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FINAL April 9, 2019 121
F.4 Category 4a Waters
Maryland's 2018 Final Integrated Report - Category 4a Waters
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130102-T-ASSAWOMAN_BAY
Assawoman Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus approved in 2014.
Upstream Source
Dissolved Oxygen
MD-02130102-T-GREYS_CREEK
Assawoman Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus approved in 2014.
Upstream Source
Dissolved Oxygen
MD-02130102-T-GREYS_CREEK
Assawoman Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus approved in 2014.
Upstream Source
Dissolved Oxygen
MD-02130102-T-ASSAWOMAN_BAY
Assawoman Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus approved in 2014.
Upstream Source
Dissolved Oxygen
MD-02130103-T-STMARTIN_RIVER
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130103-T-TURVILLE_CREEK
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Agriculture
Dissolved Oxygen
Page 1 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130103-T-HERRING_CREEK
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Agriculture
Dissolved Oxygen
MD-02130103-T-ISLE_OF_WIGHT_BAY
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Agriculture
Dissolved Oxygen
MD-02130103-T-ISLE_OF_WIGHT_BAY
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130103-T-SHINGLE_LANDING_PRONG
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130103-T-MANKLIN_CREEK
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130103-T-SHINGLE_LANDING_PRONG
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Agriculture
Dissolved Oxygen
Page 2 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130103-T-STMARTIN_RIVER
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Agriculture
Dissolved Oxygen
MD-02130103-T-BISHOPVILLE_PRONG
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130103-T-MANKLIN_CREEK
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Agriculture
Dissolved Oxygen
MD-02130103-T-HERRING_CREEK
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130103-T-BISHOPVILLE_PRONG
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Agriculture
Dissolved Oxygen
MD-02130103-T-TURVILLE_CREEK
Isle of Wight Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Urban Runoff/Storm Sewers
Dissolved Oxygen
Page 3 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130104-T
Sinepuxent Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus approved in 2014.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130104-T
Sinepuxent Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus approved in 2014.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130105-T-NEWPORT_CREEK
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Agriculture
Dissolved Oxygen
MD-02130105-T-NEWPORT_BAY
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
Data collected to support TMDL development in the Newport Bay watershed led to the identification of phosphorus as a significant pollutant in the mainstem portion of Newport Bay.
Agriculture
Dissolved Oxygen
MD-02130105-T-MARSHALL_CREEK
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Agriculture
Dissolved Oxygen
MD-02130105-T-AyerCreek_and_KittsBranch
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002. The Ayer Creek and Kitts Branch assessment records were consolidated into one record in the 2016 IR.
Agriculture
Dissolved Oxygen
Page 4 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130105-T-NEWPORT_BAY
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002.
Agriculture
Dissolved Oxygen
MD-02130105-T-AyerCreek_and_KittsBranch
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
A revised set of TMDLs for nitrogen and phosphorus were approved in 2014 and now supercede the previous TMDLs approved in 2002. The Ayer Creek and Kitts Branch assessment records were consolidated into one record in the 2016 IR.
Agriculture
Dissolved Oxygen
MD-02130105-T-NEWPORT_CREEK
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
Data collected to support TMDL development in the Newport Bay watershed led to the identification of phosphorus as a significant pollutant in Newport Creek.
Agriculture
Dissolved Oxygen
MD-02130105-T-MARSHALL_CREEK
Newport Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Agriculture
Dissolved Oxygen
MD-021301060672-Big_Mill_Pond
Chincoteague Bay WO Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2002
Agriculture
Unknown
MD-021301060672-Big_Mill_Pond
Chincoteague Bay WO Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2002
Agriculture
Dissolved Oxygen
Page 5 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130106-T
Chincoteague Bay WO Coastal Bay
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Upstream Source
Dissolved Oxygen
MD-02130106-T
Chincoteague Bay WO Coastal Bay
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDLs for nitrogen and phosphorus were approved in 2014.
Upstream Source
Dissolved Oxygen
MD-POCMH-OH-02130201
Pocomoke Sound SO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2010
This listing was split back out from the combined listing in 2008 (AU-ID: MD-POCMH-OH-Pocomoke_Sound-River) for TMDL accounting purposes. A joint TMDL written in concert with VA was approved in 2009.
Manure Runoff
Direct Measurement
MD-POCOH
POCOH - Middle Pocomoke River Oligohaline
WO, SO Chesapeake Bay segment
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Water Clarity
MD-POCOH
POCOH - Middle Pocomoke River Oligohaline
WO, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POCOH
POCOH - Middle Pocomoke River Oligohaline
WO, SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 6 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POCOH
POCOH - Middle Pocomoke River Oligohaline
WO, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POCOH
POCOH - Middle Pocomoke River Oligohaline
WO, SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POCMH-SWSAV
POCMH - Lower Pocomoke River Mesohaline
SO Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The combined assessment of SAV acreage and water clarity does not meet standards. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-POCOH-02130202-Pocomoke
Lower Pocomoke River SO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2010
This listing was split back out from the combined listing in 2008 (AU-ID: MD-POCMH-OH-Pocomoke_Sound-River) for TMDL accounting purposes. A joint TMDL written in concert with VA was approved in 2009.
Manure Runoff
Direct Measurement
MD-POCTF
POCTF - Upper Pocomoke River Tidal Fresh
WO, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POCTF
POCTF - Upper Pocomoke River Tidal Fresh
WO, SO Chesapeake Bay segment
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Water Clarity
Page 7 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POCTF
POCTF - Upper Pocomoke River Tidal Fresh
WO, SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POCTF
POCTF - Upper Pocomoke River Tidal Fresh
WO, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POCTF
POCTF - Upper Pocomoke River Tidal Fresh
WO, SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-02130203
Upper Pocomoke River WI, WO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
The Biostressor analysis indicates that excess phosphorus is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Crop Production (Crop Land or Dry Land)
94%
Dissolved Oxygen
MD-021302030648-Adkins_Pond
Upper Pocomoke River WI Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2002
Agriculture
Dissolved Oxygen
MD-021302030648-Adkins_Pond
Upper Pocomoke River WI Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2002
Agriculture
Unknown
Page 8 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130203
Upper Pocomoke River WI, WO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2014
The Biostressor analysis indicates that sediment is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Crop Production (Crop Land or Dry Land)
84%
Habitat Evaluation
MD-02130204-Multiple_segments
Dividing Creek WI, WO, SO
Non-tidal Segment(s)
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Wastes from Pets
Direct Measurement
MD-TANMH-LAWS_UPPER-THOROFARE
TANMH - Tangier Sound Mesohaline
SO Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2012
TMDL approved in 2006. Recent data shows this area failing to meet the shellfish bacteria standard.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-TANMH-SWSAV
TANMH - Tangier Sound Mesohaline
DO, SO Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-TANMH
TANMH - Tangier Sound Mesohaline
DO, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-TANMH
TANMH - Tangier Sound Mesohaline
DO, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 9 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-BIGMH-SWSAV
BIGMH - Big Annemessex River Mesohaline
SO Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-MANMH
MANMH - Manokin River Mesohaline
SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
MD-MANMH-MANOKIN_RIVER
MANMH - Manokin River Mesohaline
SO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-MANMH
MANMH - Manokin River Mesohaline
SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. Older TMDLs (2001) for nitrogen and BOD also still apply to this segment.
Agriculture
Dissolved Oxygen
MD-MANMH
MANMH - Manokin River Mesohaline
SO Chesapeake Bay segment
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD)
TMDL approved 2002
This assessment record remains from an older TMDL approved in 2001.
Agriculture
Direct Measurement
MD-MANMH-ST.PETERS_CREEK
MANMH - Manokin River Mesohaline
SO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
Page 10 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-MANMH
MANMH - Manokin River Mesohaline
SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
MD-MANMH-SWSAV
MANMH - Manokin River Mesohaline
SO Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-MANMH
MANMH - Manokin River Mesohaline
SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. Older TMDLs (2001) for nitrogen and BOD also still apply to this segment.
Agriculture
Dissolved Oxygen
MD-WICMH-Wicomico_River
WICMH - Wicomico River Mesohaline
WI, SO Tidal Shellfish Area
Shellfishing Fecal Coliform Split out from a previous listing
2018
WICHMH-Wicomico_River-4 (Station 1406004) was split out from this listing (MD-WICMH-Wicomico_River) in the 2018 IR since it now supports the shellfish harvesting bacteria standard.
On-site Treatment Systems (Septic Systems and Similar Decentralized Systems)
Direct Measurement
MD-021303010558-Tony_Tank_Lake
Lower Wicomico River WI Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2000
Urban Runoff/Storm Sewers
Unknown
MD-WICMH-02130301
WICMH - Wicomico River Mesohaline
WI, SO Chesapeake Bay segment
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD)
TMDL approved 2002
This assessment record remains due to a TMDL approved in 2001.
Urban Runoff/Storm Sewers
Direct Measurement
Page 11 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021303010558-Tony_Tank_Lake
Lower Wicomico River WI Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2000
Agriculture
Dissolved Oxygen
MD-WICMH
WICMH - Wicomico River Mesohaline
WI, SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire WICMH segment. Older TMDLs also still apply to the Wicomico Creek (2001) and Lower Wicomico River (2001) portions of this segment.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-WICMH
WICMH - Wicomico River Mesohaline
WI, SO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire WICMH segment. Older TMDLs also still apply to the Wicomico Creek (2001) and Lower Wicomico River (2001) portions of this segment.
Agriculture
Dissolved Oxygen
MD-WICMH
WICMH - Wicomico River Mesohaline
WI, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire WICMH segment. Older TMDLs also still apply to the Wicomico Creek (2001) and Lower Wicomico River (2001) portions of this segment.
Agriculture
Dissolved Oxygen
MD-WICMH
WICMH - Wicomico River Mesohaline
WI, SO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire WICMH segment. Older TMDLs also still apply to the Wicomico Creek (2001) and Lower Wicomico River (2001) portions of this segment.
Urban Runoff/Storm Sewers
Dissolved Oxygen
Page 12 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-WICMH-02130302-1
WICMH - Wicomico River Mesohaline
SO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2012
The size of this impaired assessment unit was reduced in 2014 as two of the three stations delineating this area were meeting shellfish harvesting standards.
On-site Treatment Systems (Septic Systems and Similar Decentralized Systems)
Direct Measurement
MD-02130304-Multiple_segments_1
Wicomico River Headwaters WI Non-tidal Segment(s)
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2008
Inadvertantly listed as a tidal water in 1996. Changed to non-tidal in 2004 to refine the area of impairment. The impaired portion of this watershed is confined to specified portions of Leonard Pond Run, Brewington Branch and Middle Neck Branch.
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-02130304
Wicomico River Headwaters WI Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2002
TMDL includes Johnson PondAgriculture
Dissolved Oxygen
MD-02130304-Johnsons_Pond
Wicomico River Headwaters WI Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2002
TMDL includes all of Wicomico River watershed
Agriculture
Direct Measurement
MD-02130304-Johnsons_Pond
Wicomico River Headwaters WI Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2002
TMDL includes all of Wicomico River watershed
Agriculture
Dissolved Oxygen
MD-02130304
Wicomico River Headwaters WI Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2002
TMDL includes Johnson PondAgriculture
Habitat Evaluation
Page 13 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-NANMH-Nanticoke_River-1
NANMH - Lower Nanticoke River Mesohaline
DO, WI Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2009
This shellfish harvesting area was split in the 2016 IR because two stations (1405144A and 1405144B) are now meeting the shellfish harvesting criteria. This listing record still captures the remaining impaired portion of the Nanticoke River.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-NANTF
NANTF - Upper Nanticoke River Tidal Fresh
DO, WI Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-NANTF
NANTF - Upper Nanticoke River Tidal Fresh
DO, WI Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-NANTF
NANTF - Upper Nanticoke River Tidal Fresh
DO, WI Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-NANTF
NANTF - Upper Nanticoke River Tidal Fresh
DO, WI Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 14 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-NANOH
NANOH - Middle Nanticoke River Oligohaline
DO, WI Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire NANOH segment. An older TMDL (2001) also still applies to the Marshyhope Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-NANOH-SWSAV
NANOH - Middle Nanticoke River Oligohaline
DO, WI Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The combined assessment of SAV acreage and water clarity does not meet standards. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-NANOH
NANOH - Middle Nanticoke River Oligohaline
DO, WI Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire NANOH segment. An older TMDL (2001) also still applies to the Marshyhope Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-NANOH
NANOH - Middle Nanticoke River Oligohaline
DO, WI Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire NANOH segment. An older TMDL (2001) also still applies to the Marshyhope Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-NANOH
NANOH - Middle Nanticoke River Oligohaline
DO, WI Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire NANOH segment. An older TMDL (2001) also still applies to the Marshyhope Creek portion of this segment.
Source Unknown
Dissolved Oxygen
Page 15 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-HNGMH
HNGMH - Honga River Mesohaline
DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-HNGMH
HNGMH - Honga River Mesohaline
DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-HNGMH-Back_Creek
Honga River DO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2008
Wastes from Pets
Direct Measurement
MD-LCHMH-SWSAV
LCHMH - Little Choptank River Mesohaline
DO Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-LCHMH-Church_Creek
Little Choptank River DO Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2012
TMDL completed in 2005. Newest data shows that the bacteria water quality standard is not being met.
Wastes from Pets
Direct Measurement
MD-LCHMH
LCHMH - Little Choptank River Mesohaline
DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 16 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-LCHMH
LCHMH - Little Choptank River Mesohaline
DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOMH1-TOWN_CREEK
CHOMH1 - Choptank River Mesohaline mouth 1
TA Tidal subsegment
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD)
TMDL approved 2004
This assessment records remains due to a TMDL approved in 2003.
Agriculture
Direct Measurement
MD-CHOMH2-Goose_Creek
Lower Choptank River DO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-CHOMH2-Whitehall_Creek
Lower Choptank River DO Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2016
TMDL completed in 2006.Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-CHOMH1-Northeast_Branch
Lower Choptank River TA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-CHOMH1-San_Domingo_Creek_NE_Branch
Lower Choptank River TA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2008
A separate TMDL was done for the northwest and northeast branch of San Domingo.
Manure Runoff
Direct Measurement
MD-CHOMH2-Warwick_River
Lower Choptank River DO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
Page 17 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHOMH1-SWSAV
CHOMH1 - Choptank River Mesohaline mouth 1
TA, DO Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-CHOMH2-Indian_Creek
Lower Choptank River DO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-CHOMH1-Tred_Avon_River
Lower Choptank River TA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-021304030463-La_Trappe_Creek_Pond
Lower Choptank River TA Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2004
Municipal Point Source Discharges
Dissolved Oxygen
MD-02130403-UTLTC
Lower Choptank River TA Non-tidal Segment(s)
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD), nitrogenous
TMDL approved 2004
TMDL developed for the unnamed trib to La Trappe Creek.
Municipal Point Source Discharges
Direct Measurement
MD-CHOMH2-LOWER_CHOPTANK_RIVER_MAINSTEM
Lower Choptank River TA, DO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2008
A new shellfishing area contiguous to this listing was added to the area of impairment. It is represented by the listing MD-CHOMH2-CHOPTANK_RIVER_MAINSTEM2
Manure Runoff
Direct Measurement
Page 18 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130403-UTLTC
Lower Choptank River TA Non-tidal Segment(s)
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD), carbonaceous
TMDL approved 2004
TMDL developed for the unnamed trib to La Trappe Creek.
Municipal Point Source Discharges
Direct Measurement
MD-CHOMH1-Tar_Creek-2
Lower Choptank River TA Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2016
TMDL was previously completed for this area. Newer data shows this smaller portion of Tar Creek as failing to meet the shellfish harvesting criteria.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-CHOMH2
CHOMH2 - Lower Choptank River Mesohaline 2
TA, DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOMH2
CHOMH2 - Lower Choptank River Mesohaline 2
TA, DO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOMH2
CHOMH2 - Lower Choptank River Mesohaline 2
TA, DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOMH1
CHOMH1 - Choptank River Mesohaline mouth 1
TA, DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHOMH1 segment. An older TMDL (2003) also still applies to the Town Creek portion of this segment.
Source Unknown
Dissolved Oxygen
Page 19 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHOMH1
CHOMH1 - Choptank River Mesohaline mouth 1
TA, DO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHOMH1 segment. An older TMDL (2003) also still applies to the Town Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHOMH1
CHOMH1 - Choptank River Mesohaline mouth 1
TA, DO Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHOMH1 segment. An older TMDL (2003) also still applies to the Town Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHOMH2
CHOMH2 - Lower Choptank River Mesohaline 2
TA, DO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOMH2-SWSAV
CHOMH2 - Lower Choptank River Mesohaline 2
TA, DO Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-CHOMH2-Lower_Choptank_River_Mainstem-2
CHOMH2 - Lower Choptank River Mesohaline 2
TA, DO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2018
This is a new listing that adds an additional chunk of impaired water onto the original shellfish listing for the mainstem Choptank. In 2018 it was determined that this area was covered under the previous Mainstem TMDL
Source Unknown
Direct Measurement
Page 20 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHOMH1
CHOMH1 - Choptank River Mesohaline mouth 1
TA, DO Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHOMH1 segment. An older TMDL (2003) also still applies to the Town Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHOOH
CHOOH - Choptank River Oligohaline
TA, DO, CA
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOOH
CHOOH - Choptank River Oligohaline
TA, DO, CA
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOOH
CHOOH - Choptank River Oligohaline
TA, DO, CA
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOOH-SWSAV
CHOOH - Choptank River Oligohaline
TA, DO, CA
Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
Page 21 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHOOH
CHOOH - Choptank River Oligohaline
TA, DO, CA
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOTF
CHOTF - Upper Choptank River Tidal Fresh
TA, QA, CA
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOTF
CHOTF - Upper Choptank River Tidal Fresh
TA, QA, CA
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOTF
CHOTF - Upper Choptank River Tidal Fresh
TA, QA, CA
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOTF
CHOTF - Upper Choptank River Tidal Fresh
TA, QA, CA
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CHOTF
CHOTF - Upper Choptank River Tidal Fresh
TA, QA, CA
Chesapeake Bay segment
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Water Clarity
Page 22 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130405-Tuckahoe_Lake
Tuckahoe Creek QA, CA Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2004
Atmospheric Deposition - Toxics
Direct Measurement
MD-EASMH-Little_Creek
Eastern Bay QA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 23 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-EASMH
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-EASMH-SWSAV
EASMH - Eastern Bay Mesohaline
QA, TA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-EASMH-Leeds_Creek
Miles River TA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-EASMH-Miles_River
Miles River TA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
An additional area was added to this restricted shellfish area and was not covered under this TMDL. See listing for MD-EASMH-Miles_River2.
Manure Runoff
Direct Measurement
MD-EASMH-Wye_River
Wye River QA, TA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2008
Livestock (Grazing or Feeding Operations)
Direct Measurement
Page 24 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-EASMH-WYE_RIVER-2
Wye River QA, TA Tidal Shellfish Area
Shellfishing Fecal Coliform Split out from a previous listing
2018
This shellfish harvesting area was split in the 2018 IR because three stations (0802014, 0802019, and 0802023) are now meeting the shellfish harvesting criteria. This listing record still captures the remaining impaired portion of the Wye River.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-EASMH-Wells_Cove
Kent Narrows - Prospect Bay QA Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2014
TMDL approved in 2006. Recent data shows that bacteria water quality standards are being exceeded.
Wastes from Pets
Direct Measurement
MD-CHSOH-Lower_Chester_River
Lower Chester River KE, QA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2009
TMDL written and approved for a contiguous body of water that includes parts of the Southeast Creek, Lower Chester, and Middle Chester that are tidal.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHSMH-SWSAV
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
Page 25 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
Page 26 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHSMH
CHSMH - Lower Chester River Mesohaline
KE, QA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSMH segment. An older TMDL (2000) also still applies to the Corsica River portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CHSOH
CHSOH - Middle Chester River Oligohaline
KE, QA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSOH segment. Older TMDLs also still apply to the Southeast Creek (2003), Middle Chester (2006), and Upper Chester River (2006) portions of this segment.
Agriculture
Dissolved Oxygen
MD-CHSOH
CHSOH - Middle Chester River Oligohaline
KE, QA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSOH segment. Older TMDLs also still apply to the Southeast Creek (2003), Middle Chester (2006), and Upper Chester River (2006) portions of this segment.
Agriculture
Dissolved Oxygen
Page 27 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHSOH
CHSOH - Middle Chester River Oligohaline
KE, QA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSOH segment. Older TMDLs also still apply to the Southeast Creek (2003), Middle Chester (2006), and Upper Chester River (2006) portions of this segment.
Agriculture
Dissolved Oxygen
MD-CHSOH
CHSOH - Middle Chester River Oligohaline
KE, QA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CHSOH segment. Older TMDLs also still apply to the Southeast Creek (2003), Middle Chester (2006), and Upper Chester River (2006) portions of this segment.
Agriculture
Dissolved Oxygen
MD-CHSMH-02130507
Corsica River KE, QA Tidal subsegment
Fishing PCBs in Fish Tissue TMDL approved 2012
This listing only applies to the Corsica River (02130507) portion of CHSMH.
Upstream/Downstream Source
Direct Measurement
MD-CHSMH-Corsica_River
Corsica River QA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-CHSOH-Southeast_River
Southeast Creek KE, QA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2009
TMDL written and approved for a contiguous body of water that includes parts of the Southeast Creek, Lower Chester, and Middle Chester that are tidal.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-CHSOH-Middle_Chester_River
Middle Chester River KE, QA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2009
TMDL written and approved for a contiguous body of water that includes parts of the Southeast Creek, Lower Chester, and Middle Chester that are tidal.
Livestock (Grazing or Feeding Operations)
Direct Measurement
Page 28 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021305090415-Urieville_Lake
Middle Chester River KE Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2000
Agriculture
Dissolved Oxygen
MD-021305090415-Urieville_Lake
Middle Chester River KE Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2000
Agriculture
Unknown
MD-CHSTF
CHSTF - Upper Chester River Tidal Fresh
KE, QA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2006) also still applies.
Agriculture
Dissolved Oxygen
MD-CHSTF
CHSTF - Upper Chester River Tidal Fresh
KE, QA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2006) also still applies.
Agriculture
Dissolved Oxygen
MD-CHSTF
CHSTF - Upper Chester River Tidal Fresh
KE, QA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2006) also still applies.
Agriculture
Dissolved Oxygen
MD-02130510-Millington_Wildlife_Ponds
Upper Chester River KE Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2012
Atmospheric Deposition - Toxics
Direct Measurement
MD-CHSTF-Duck_Neck_Beach
Upper Chester River QA No longer a recognized Beach
Water Contact Sports Enterococcus TMDL approved 2012
No longer designated as a beach by QA County. QA County will no longer be monitoring this site.
Wildlife Other than Waterfowl
Direct Measurement
Page 29 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CHSTF
CHSTF - Upper Chester River Tidal Fresh
KE, QA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2006) also still applies.
Agriculture
Dissolved Oxygen
MD-ELKOH
ELKOH - Elk River Oligohaline
CE Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2014
This listing now incorporates the Little, Lower, and Upper portions of the Elk (watersheds 02130601, 02130603, 02130605). These listings were aggregated since they were hydrologically connected.
Non-point Source
Direct Measurement
MD-ELKOH
ELKOH - Elk River Oligohaline
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-ELKOH
ELKOH - Elk River Oligohaline
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-ELKOH
ELKOH - Elk River Oligohaline
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-ELKOH
ELKOH - Elk River Oligohaline
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 30 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-BOHOH
BOHOH - Bohemia River Oligohaline
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2001) also still applies.
Agriculture
Dissolved Oxygen
MD-BOHOH
BOHOH - Bohemia River Oligohaline
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2001) also still applies.
Agriculture
Dissolved Oxygen
MD-BOHOH
BOHOH - Bohemia River Oligohaline
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2001) also still applies.
Agriculture
Dissolved Oxygen
MD-BOHOH
BOHOH - Bohemia River Oligohaline
CE Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2012
Upstream/Downstream Source
Direct Measurement
MD-BOHOH
BOHOH - Bohemia River Oligohaline
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2001) also still applies.
Agriculture
Dissolved Oxygen
MD-C&DOH
C&DOH - C&D Canal Oligohaline
CE Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2014
Non-point Source
Direct Measurement
Page 31 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-C&DOH
C&DOH - C&D Canal Oligohaline
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-C&DOH
C&DOH - C&D Canal Oligohaline
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-C&DOH
C&DOH - C&D Canal Oligohaline
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-C&DOH
C&DOH - C&D Canal Oligohaline
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-NORTF
NORTF - North East River Tidal Fresh
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Agriculture
Dissolved Oxygen
MD-NORTF
NORTF - North East River Tidal Fresh
CE Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2012
This listing only applies to watershed 02130608.
Upstream/Downstream Source
Direct Measurement
Page 32 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-NORTF
NORTF - North East River Tidal Fresh
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Agriculture
Dissolved Oxygen
MD-NORTF
NORTF - North East River Tidal Fresh
CE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Agriculture
Dissolved Oxygen
MD-NORTF
NORTF - North East River Tidal Fresh
CE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Agriculture
Dissolved Oxygen
MD-SASOH
SASOH - Sassafras River Oligohaline
CE, KE Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2012
Contaminated Sediments
Direct Measurement
MD-SASOH
SASOH - Sassafras River Oligohaline
CE, KE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2002) also still applies.
Agriculture
Dissolved Oxygen
MD-SASOH
SASOH - Sassafras River Oligohaline
CE, KE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2002) also still applies.
Agriculture
Dissolved Oxygen
Page 33 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-SASOH
SASOH - Sassafras River Oligohaline
CE, KE Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
MD-SASOH-SWSAV
SASOH - Sassafras River Oligohaline
CE, KE Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-SASOH
SASOH - Sassafras River Oligohaline
CE, KE Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
MD-BSHOH
BSHOH - Bush River Oligohaline
HA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-BSHOH
BSHOH - Bush River Oligohaline
HA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-BSHOH
BSHOH - Bush River Oligohaline
HA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 34 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-BSHOH
BSHOH - Bush River Oligohaline
HA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-02130704
Bynum Run HA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2011
The Biostressor analysis indicated that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL for sediment addresses a portion of the biological impairment listing.
Urban Runoff/Storm Sewers
37%
Habitat Evaluation
MD-GUNOH-02130801
Gunpowder River HA, BA Tidal subsegment
Fishing PCBs in Fish Tissue TMDL approved 2016
This listing only applies to the Gunpowder River portion of GUNOH. TMDL approved in 2016. Note: Seneca Creek is not included as part of this listing since it is not hydrologically connected to the Gunpowder.
Contribution from Downstream Waters due to Tidal Action
Direct Measurement
MD-GUNOH
GUNOH - Gunpowder River Oligohaline
HA, BA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-GUNOH
GUNOH - Gunpowder River Oligohaline
HA, BA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-GUNOH
GUNOH - Gunpowder River Oligohaline
HA, BA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 35 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-GUNOH
GUNOH - Gunpowder River Oligohaline
HA, BA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-GUNOH-SWSAV
GUNOH - Gunpowder River Oligohaline
HA, BA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-MIDOH
MIDOH - Middle River Oligohaline
BA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MIDOH
MIDOH - Middle River Oligohaline
BA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MIDOH
MIDOH - Middle River Oligohaline
BA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MIDOH
MIDOH - Middle River Oligohaline
BA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 36 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130802
Lower Gunpowder Falls BA 1st thru 4th order streams
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2018
The Biostressor analysis indicates that sediment is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing. TMDL has been approved for sediments.
Urban Runoff/Storm Sewers
61%
Habitat Evaluation
MD-GUNOH-02130803
Bird River BA Tidal subsegment
Fishing PCBs in Fish Tissue TMDL approved 2016
This listing only applies Bird River (02130803). TMDL approved in 2016.
Contribution from Downstream Waters due to Tidal Action
Direct Measurement
MD-02130805-Multiple_segments
Loch Raven Reservoir BA, CR Subwatershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-02130805-Loch_Raven_Reservoir
Loch Raven Reservoir BA, CR Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2008
Agriculture
Unknown
MD-02130805-Loch_Raven_Reservoir
Loch Raven Reservoir BA, CR Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2008
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02130805-Loch_Raven_Reservoir
Loch Raven Reservoir BA, CR Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2006
Recent fish tissue data shows levels of mercury below the criteria. However, additional data is needed to confirm this improvement and thus justify a delisting.
Atmospheric Deposition - Toxics
Direct Measurement
Page 37 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130806
Prettyboy Reservoir BA, CR River Mainstem
Water Contact Sports Fecal Coliform TMDL approved 2009
This assessment was previously only shown as a small segment impairment. It has now been corrected to show all flowing waters within this watershed as impaired (Category 4a) and addressed by the TMDL.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-021308060313-Prettyboy_Reservoir
Prettyboy Reservoir BA Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2006
Recent fish tissue data shows levels of mercury below the criteria. However, additional data is needed to confirm this improvement and thus justify a delisting.
Atmospheric Deposition - Toxics
Direct Measurement
MD-021308060313-Prettyboy_Reservoir
Prettyboy Reservoir BA Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2008
Agriculture
Dissolved Oxygen
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The combined assessment of SAV acreage and water clarity does not meet standards. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
Page 38 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Fishing Chlordane TMDL approved 2002
Recently collected data on Brown Bullheads and white perch shows chlordane levels below the fish tissue threshold. However, the department prefers to collect data on catfish prior to delisting this segment for chlordane.
Contaminated Sediments
Direct Measurement
MD-02130901
Back River BA, BC 1st thru 4th order streams
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2018
TMDL applies only to non-tidal 1st-4th order streams within the MD 8-digit Back River wastershed (MD-02130901).
Urban Runoff/Storm Sewers
85%
Habitat Evaluation
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Aquatic Life and Wildlife Polychlorinated biphenyls (PCBs)
TMDL approved 2014
Contaminated Sediments
Direct Measurement
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-02130901-HERRING_RUN
Back River BA, BC River Mainstem
Water Contact Sports Fecal Coliform TMDL approved 2008
applies to basin numbers 021309011040, 021309011041, 021309011042
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
Page 39 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2014
Contaminated Sediments
Direct Measurement
MD-BACOH
BACOH - Back River Oligohaline
BA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-PATMH-SWSAV
PATMH - Patapsco River Mesohaline
AA, BA, BC
SAV Grow Zone
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Non-navigation Channel Areas
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2007) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Non-navigation Channel Areas
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2007) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Non-navigation Channel Areas
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2007) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
Page 40 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Non-navigation Channel Areas
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2007) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-PATMH-CURTIS_BAY_CREEK
PATMH - Patapsco River Mesohaline
AA, BC Tidal subsegment
Aquatic Life and Wildlife Polychlorinated biphenyls (PCBs)
TMDL approved 2014
This PCB listing was due to sediment data and fish tissue.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-PATMH-Middle-NorthwestHarbor-littoral
PATMH - Patapsco River Mesohaline
AA, BA, BC
Tidal subsegment
Water Contact Sports Trash TMDL approved 2016
Listing only applies to the littoral zone of the Middle Branch (Ferry Bar Park around to Harbor Hospital Center) and the littoral zone of the Northwest Harbor (from Hull Street Pier to Canton Waterfront Park).
Illegal Dumps or Other Inappropriate Waste Disposal
Direct Measurement
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Non-navigation Channel Areas
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2007) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Non-navigation Channel Areas
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2007) also still applies.
Municipal Point Source Discharges
Dissolved Oxygen
Page 41 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PATMH-02130903
Baltimore Harbor Watershed AA, BA, BC
Chesapeake Bay segment
Fishing Chlordane TMDL approved 2002
This listing only applies to the Baltimore Harbor (02130903) portion of PATMH. Recently collected data on chlordane levels in fish tissue generally show levels to be below the fish tissue threshold. However more data is needed to confirm delisting.
Contaminated Sediments
Direct Measurement
MD-PATMH-02130903-Mainstem
Baltimore Harbor Watershed AA, BA, BC
Tidal subsegment
Fishing PCBs in Fish Tissue TMDL approved 2014
This listing only applies to the Baltimore Harbor (02130903) portion of PATMH. A TMDL has now been completed.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-PATMH-FURNACE_CREEK
PATMH - Patapsco River Mesohaline
AA Subwatershed
Water Contact Sports Enterococcus TMDL approved 2012
Data collected in 2007 by AA county indicate Furnace Creek is impaired for bacteria, see "ListingReview_old98_listings.doc" - 303(d) data for 2008 list. NOTE: Area for Furnace Creek does not include Back Creek which = 0.024 sq. miles
Wildlife Other than Waterfowl
Direct Measurement
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Navigation Channel
Seasonal Deep-Channel Refuge Use
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant-designated use combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PATMH
PATMH - Patapsco River Mesohaline
AA, BA, BC
Navigation Channel
Seasonal Deep-Channel Refuge Use
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant-designated use combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 42 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PATMH-Bear_Creek
PATMH - Patapsco River Mesohaline
BA Tidal subsegment
Aquatic Life and Wildlife Polychlorinated biphenyls (PCBs)
TMDL approved 2014
This PCB listing was due to sediment data and fish tissue.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-PATMH-MARLEY_CREEK
PATMH - Patapsco River Mesohaline
AA Subwatershed
Water Contact Sports Enterococcus TMDL approved 2012
Data collected in 2007 by AA county indicate Marley Creek is impaired for bacteria, see "ListingReview_old98_listings.doc" - 303(d) data for 2008 list. NOTE: Tanyard Cove area was not included in Marley Creek and = 0.067 sq miles.
Wastes from Pets
Direct Measurement
MD-02130904
Jones Falls BA, BC Non-tidal 8-digit watershed
Water Contact Sports Fecal Coliform TMDL approved 2008
Cause/Pollutant was changed from generic (Fecal Bacteria) back to the original Fecal Coliform to align with EPA parameter names.
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-02130904
Jones Falls BA, BC Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
The Biostressor analysis indicated that TSS is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Urban Runoff/Storm Sewers
93%
Habitat Evaluation
MD-02130904-Lake_Roland
Jones Falls BA Impoundments
Fishing PCBs in Fish Tissue TMDL approved 2014
Upstream Source
Direct Measurement
MD-02130905
Gwynns Falls BA, BC Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2010
The Biostressor analysis indicated that TSS is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Urban Runoff/Storm Sewers
24%
Habitat Evaluation
Page 43 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130905
Gwynns Falls BA, BC Non-tidal 8-digit watershed
Water Contact Sports Fecal Coliform TMDL approved 2008
Cause/Pollutant was changed from generic (Fecal Bacteria) back to the original Fecal Coliform to align with EPA parameter names.
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-02130906
Patapsco River Lower North Branch
AA, BA, BC, HO, CR
Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
The Biostressor analysis indicated that TSS is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Urban Runoff/Storm Sewers
70%
Habitat Evaluation
MD-02130906-Multiple_segments_upper
Patapsco River Lower North Branch
AA, BA, BC, HO, CR
Subwatershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
This listing was split out from the previous watershed-wide listing for fecal bacteria in the Lower North Branch Patapsco watershed.
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-02130906-Multiple_segments_lower
Patapsco River Lower North Branch
AA, BA, BC, HO, CR
Subwatershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
This listing was split out from the previous watershed-wide listing for fecal bacteria in the Lower North Branch Patapsco watershed.
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-02130907-Multiple_segments
Liberty Reservoir BA, CR Non-tidal Segment(s)
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-02130907-Liberty_Reservoir
Liberty Reservoir BA, CR Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
TMDL completed.Crop Production (Crop Land or Dry Land)
Dissolved Oxygen
Page 44 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02130907-Liberty_Reservoir
Liberty Reservoir BA, CR Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2014
TMDL completed.Crop Production (Crop Land or Dry Land)
Direct Measurement
MD-MAGMH
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MAGMH
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2016
Contaminated Sediments
Direct Measurement
MD-MAGMH-Magothy_River
MAGMH - Magothy River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-MAGMH
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MAGMH
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MAGMH
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 45 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-MAGMH
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MAGMH-Tar_Cove
MAGMH - Magothy River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2012
TMDL approved in 2006. Recent data continue to show the shellfish criteria being exceeded.
Wastes from Pets
Direct Measurement
MD-MAGMH
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-MAGMH-Forked_Creek
MAGMH - Magothy River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-MAGMH-SWSAV
MAGMH - Magothy River Mesohaline
AA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-CB4MH-Whitehall_Meredith_Creeks
CB4MH - Middle Chesapeake Bay Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2008
Original shellfish-area listing for Severn River was split into 3 separate listings in 2004 to refine area of impairment. These listings were split into: the mainstem Severn, Mill Creek, and a combined listing for Meredith and Whitehall Creek.
Wastes from Pets
Direct Measurement
Page 46 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-SEVMH
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SEVMH-Severn_River-2
SEVMH - Severn River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2008
In 2010 the Severn River shellfish listing was split into two separate geographic areas after the middle section became approved for shellfish harvesting. This record captures the upstream-most bacteria impairment.
Wastes from Pets
Direct Measurement
MD-CB4MH-Mill_Creek
CB4MH - Middle Chesapeake Bay Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2008
Original shellfish-area listing for Severn River was split into 3 separate listings in 2004 to refine area of impairment. These listings were split into: the mainstem Severn, Mill Creek, and a combined listing for Meredith and Whitehall Creek.
Wastes from Pets
Direct Measurement
MD-SEVMH
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SEVMH
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2016
This listing only includes the Severn mainstem, not Whitehall or Mill Creek.
Contaminated Sediments
Direct Measurement
MD-SEVMH
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 47 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-SEVMH-SWSAV
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-SEVMH
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SEVMH
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SEVMH
SEVMH - Severn River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SOUMH
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SOUMH-DUVALL_CREEK
SOUMH - South River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
Page 48 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-SOUMH-SELBY_BAY-1
SOUMH - South River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform Split out from a previous listing
2018
This area assessed by station 0306801 does not meet shellfish harvesting standards. MD-SOUMH-SELBY_BAY-2 was split from this listing since stations 036115 and 0306015 were currently meeting the shellfish harvesting bacteria critera.
Wastes from Pets
Direct Measurement
MD-SOUMH
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2016
Contaminated Sediments
Direct Measurement
MD-SOUMH
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SOUMH
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-02131003
South River AA 1st thru 4th order streams
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2018
TMDL applies only to non-tidal 1st-4th order streams within the MD 8-digit South River watershed.
Urban Runoff/Storm Sewers
54%
Habitat Evaluation
MD-SOUMH
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 49 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-SOUMH
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-SOUMH-RAMSEY_LAKE
SOUMH - South River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-SOUMH-SOUTH_RIVER
SOUMH - South River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-SOUMH-SWSAV
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-SOUMH
SOUMH - South River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-RHDMH
RHDMH - Rhode River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 50 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-RHDMH
RHDMH - Rhode River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-WSTMH-PARISH_CREEK
WSTMH - West River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-WSTMH
WSTMH - West River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-WSTMH-SWSAV
WSTMH - West River Mesohaline
AA Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-WSTMH
WSTMH - West River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-RHDMH-Cadle_Creek
RHDMH - Rhode River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
Page 51 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-WSTMH
WSTMH - West River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-RHDMH
RHDMH - Rhode River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-WSTMH
WSTMH - West River Mesohaline
AA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-RHDMH-Bear_Neck_Creek
RHDMH - Rhode River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2016
New data shows this area now exceeding the shellfish harvesting area criteria. A TMDL was previously completed in 2006.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-WSTMH-WEST_RIVER
WSTMH - West River Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-WST-RHDMH-02131004
West River AA Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2016
This listing applies to all of the tidal portion of watershed 02131004.
Contaminated Sediments
Direct Measurement
MD-RHDMH
RHDMH - Rhode River Mesohaline
AA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 52 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CB4MH-TracyRockhold_Creeks
CB4MH - Middle Chesapeake Bay Mesohaline
AA Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-02131005
Other West Chesapeake Bay AA, CV 1st thru 4th order streams
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2018
TMDL applies only to non-tidal 1st-4th order streams within the MD 8-digit Other West Chesapeake watershed.
Anthropogenic Land Use Changes
72%
Habitat Evaluation
MD-PAXOH
PAXOH - Middle Patuxent River Oligohaline
PG, CV Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXOH
PAXOH - Middle Patuxent River Oligohaline
PG, CV Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXMH
PAXMH - Lower Patuxent River Mesohaline
CH, CV, PG, SM
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXMH
PAXMH - Lower Patuxent River Mesohaline
CH, CV, PG, SM
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 53 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PAXMH-ISLAND_CREEK
PAXMH - Lower Patuxent River Mesohaline
CV Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2012
TMDL approved in 2004.Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-PAXMH
Lower Patuxent River CH, CV, PG, SM
Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2018
TMDL approved for this segment.Atmospheric Deposition - Toxics
Direct Measurement
MD-PAXMH-WASHINGTON_PERSIMMON_CREEK
PAXMH - Lower Patuxent River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-PAXOH-SWSAV
PAXOH - Middle Patuxent River Oligohaline
PG, CV Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-021311010873-Lake_Lariat
Patuxent River lower CV Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2004
Atmospheric Deposition - Toxics
Direct Measurement
MD-PAXMH-CUCKOLD_CREEK
PAXMH - Lower Patuxent River Mesohaline
SO Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-PAXOH
PAXOH - Middle Patuxent River Oligohaline
PG, CV Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 54 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PAXMH-SOLOMONS_ISLAND_HARBOR
PAXMH - Lower Patuxent River Mesohaline
CV Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-CB5MH-HARPER_PEARSON_CREEKS
CB5MH - Lower Chesapeake Bay Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
No longer monitored. Originally monitored to see if area was suitable for aquaculture. However, lease is not active and there is no harvestable resource. Area is in prohibited zone.
Wastes from Pets
Direct Measurement
MD-CB5MH-GOOSE_CREEK
CB5MH - Lower Chesapeake Bay Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
No longer monitored. Originally monitored to see if area was suitable for aquaculture operations.
Wastes from Pets
Direct Measurement
MD-PAXMH-INDIAN_CREEK
PAXMH - Lower Patuxent River Mesohaline
CH, SM Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2012
Indian Creek is currently violating the shellfish harvesting bacteria criteria.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-PAXMH-TRENT_HALL_CREEK
PAXMH - Lower Patuxent River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-PAXMH-ST.THOMAS_CREEK
PAXMH - Lower Patuxent River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-PAXOH
PAXOH - Lower Patuxent River Oligohaline
PG, CV Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2018
TMDL approved for this segment.Non-point Source
Direct Measurement
Page 55 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PAXMH-SWSAV
PAXMH - Lower Patuxent River Mesohaline
CH, CV, PG, SM
Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-PAXOH
PAXOH - Middle Patuxent River Oligohaline
PG, CV Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXMH-TOWN_CREEK
PAXMH - Lower Patuxent River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-PAXMH
PAXMH - Lower Patuxent River Mesohaline
CH, CV, PG, SM
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXMH
PAXMH - Lower Patuxent River Mesohaline
CH, CV, PG, SM
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXMH
PAXMH - Lower Patuxent River Mesohaline
CH, CV, PG, SM
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 56 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PAXMH
PAXMH - Lower Patuxent River Mesohaline
CH, CV, PG, SM
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXMH-MILL_CREEK
PAXMH - Lower Patuxent River Mesohaline
CH Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2009
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-PAXTF
PAXTF - Upper Patuxent River Tidal Fresh
AA, CV, PG
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXTF-SWSAV
PAXTF - Upper Patuxent River Tidal Fresh
AA, CV, PG
Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-PAXTF
PAXTF - Upper Patuxent River Tidal Fresh
AA, CV, PG
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PAXTF
PAXTF - Upper Patuxent River Tidal Fresh
AA, CV, PG
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 57 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PAXTF
PAXTF - Middle Patuxent River Tidal Fresh
AA, CV, PG
Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2018
TMDL approved for this segment.Non-point Source
Direct Measurement
MD-PAXTF
PAXTF - Upper Patuxent River Tidal Fresh
AA, CV, PG
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-WBRTF
WBRTF - Western Branch Patuxent River Tidal Fresh
PG Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2000) also still applies.
Source Unknown
Dissolved Oxygen
MD-WBRTF
WBRTF - Western Branch Patuxent River Tidal Fresh
PG Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2000) also still applies.
Source Unknown
Dissolved Oxygen
MD-WBRTF
WBRTF - Western Branch Patuxent River Tidal Fresh
PG Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2000) also still applies.
Source Unknown
Dissolved Oxygen
MD-WBRTF
WBRTF - Western Branch Patuxent River Tidal Fresh
PG Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2000) also still applies.
Source Unknown
Dissolved Oxygen
Page 58 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-WBRTF
WBRTF - Western Branch Patuxent River Tidal Fresh
PG Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Water Clarity
MD-WBRTF
WBRTF - Western Branch Patuxent River Tidal Fresh
PG Chesapeake Bay segment
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD)
TMDL approved 2002
This assessment remains due to a TMDL approved in 2000.
Municipal Point Source Discharges
Direct Measurement
MD-02131104
Patuxent River upper AA, HO, PG
Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
The Biostressor analysis indicates that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL and listing for sediment addresses a portion of the biological impairment listing.
Urban Runoff/Storm Sewers
66%
Habitat Evaluation
MD-021311040938-Cash_Lake
Patuxent River upper PG Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2012
Atmospheric Deposition - Toxics
Direct Measurement
MD-02131104-lower
Patuxent River upper AA, HO, PG
Non-tidal Segment(s)
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2012
From point at Old Queen Anne's bridge on Old Queen Anne's bridge road to the confluence of the Patuxent River with the Little Patuxent River.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-02131105
Little Patuxent River AA, HO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
The Biostressor analysis indicated that sediment is a major stressor affecting biological integrity in this watershed. The TMDL for sediment addresses a portion of the biological impairment listing.
Urban Runoff/Storm Sewers
84%
Habitat Evaluation
Page 59 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021311050955-Centennial_Lake
Little Patuxent River HO Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2004
Agriculture
Dissolved Oxygen
MD-021311050955-Centennial_Lake
Little Patuxent River HO Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2004
Agriculture
Unknown
MD-021311070941-Rocky_Gorge_Reservoir
Rocky Gorge Dam HO, MO, PG
Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2009
Name of listing changed from Duckett Reservoir to proper name as Rocky Gorge Reservoir.
Crop Production (Crop Land or Dry Land)
Dissolved Oxygen
MD-021311080966-Triadelphia_Reservoir
Brighton Dam MO, HO Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2009
Crop Production (Crop Land or Dry Land)
Dissolved Oxygen
MD-021311080966-Triadelphia_Reservoir
Brighton Dam MO, HO Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2009
Crop Production (Crop Land or Dry Land)
Unknown
MD-CB1TF
CB1TF - Northern Chesapeake Bay Tidal Fresh
CE, HA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB1TF segment. An older TMDL (2002) also still applies to the Swan Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CB1TF
CB1TF - Northern Chesapeake Bay Tidal Fresh
CE, HA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB1TF segment. An older TMDL (2002) also still applies to the Swan Creek portion of this segment.
Source Unknown
Dissolved Oxygen
Page 60 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CB1TF
CB1TF - Northern Chesapeake Bay Tidal Fresh
CE, HA Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB1TF segment. An older TMDL (2002) also still applies to the Swan Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CB1TF
CB1TF - Northern Chesapeake Bay Tidal Fresh
CE, HA Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB1TF segment. An older TMDL (2002) also still applies to the Swan Creek portion of this segment.
Source Unknown
Dissolved Oxygen
MD-CB2OH
CB2OH - Northern Chesapeake Bay Oligohaline
BA, CE, HA, KE
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB2OH segment. Older TMDLs also still apply to the Fairlee (1999), Stillpond (2002), and Worton Creek (2002) portions of this segment.
Source Unknown
Dissolved Oxygen
MD-CB2OH
CB2OH - Northern Chesapeake Bay Oligohaline
BA, CE, HA, KE
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB2OH segment. Older TMDLs also still apply to the Fairlee (1999), Stillpond (2002), and Worton Creek (2002) portions of this segment.
Source Unknown
Dissolved Oxygen
MD-CB2OH
CB2OH - Northern Chesapeake Bay Oligohaline
BA, CE, HA, KE
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB2OH segment. Older TMDLs also still apply to the Fairlee (1999), Stillpond (2002), and Worton Creek (2002) portions of this segment.
Source Unknown
Dissolved Oxygen
Page 61 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CB2OH
CB2OH - Northern Chesapeake Bay Oligohaline
BA, CE, HA, KE
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/10 addresses the nutrient load allocations for the entire CB2OH segment. Older TMDLs also still apply to the Fairlee (1999), Stillpond (2002), and Worton Creek (2002) portions of this segment.
Source Unknown
Dissolved Oxygen
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 62 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB3MH-SWSAV
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-CB3MH
CB3MH - Upper Chesapeake Bay Mesohaline
BA, AA, KE, QA
Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB5MH
CB5MH - Lower Chesapeake Bay Mesohaline
CV, SM, DO, SO
Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB5MH
CB5MH - Lower Chesapeake Bay Mesohaline
CV, SM, DO, SO
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 63 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CB5MH
CB5MH - Lower Chesapeake Bay Mesohaline
CV, SM, DO, SO
Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB5MH
CB5MH - Lower Chesapeake Bay Mesohaline
CV, SM, DO, SO
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB5MH-SWSAV
CB5MH - Lower Chesapeake Bay Mesohaline
CV, SM, DO, SO
Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-CB5MH
CB5MH - Lower Chesapeake Bay Mesohaline
CV, SM, DO, SO
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB5MH
CB5MH - Lower Chesapeake Bay Mesohaline
CV, SM, DO, SO
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB4MH
CB4MH - Middle Chesapeake Bay Mesohaline
AA, CV, QA, TA, DO
Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 64 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-CB4MH
CB4MH - Middle Chesapeake Bay Mesohaline
AA, CV, QA, TA, DO
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB4MH
CB4MH - Middle Chesapeake Bay Mesohaline
AA, CV, QA, TA, DO
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB4MH
CB4MH - Middle Chesapeake Bay Mesohaline
AA, CV, QA, TA, DO
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB4MH-SWSAV
CB4MH - Middle Chesapeake Bay Mesohaline
AA, CV, QA, TA, DO
Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-CB4MH
CB4MH - Middle Chesapeake Bay Mesohaline
AA, CV, QA, TA, DO
Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-CB4MH
CB4MH - Middle Chesapeake Bay Mesohaline
AA, CV, QA, TA, DO
Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 65 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POTMH-Whites_Neck_Creek
Potomac River Lower tidal SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-POTMH-Tall_Timbers_Cove
Potomac River Lower tidal SM Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2012
TMDL approved in 2005. Most recent data shows that the shellfish bacteria standard is not being met.
Wastes from Pets
Direct Measurement
MD-POTMH-OH-02140101
Potomac River Lower Tidal CH, SM Tidal subsegment
Fishing PCBs in Fish Tissue TMDL approved 2008
TMDLs for the tidal portion of the Anacostia and Potomac Rivers were jointly developed between VA, DC, and MD. These TMDLs addressed tidal PCB listings in these MD watersheds: 02140101, 02140102, 02140201, and 02140205.
Upstream Source
Direct Measurement
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
Page 66 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Seasonal Deep-Channel Refuge Use
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Seasonal Deep-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
MD-POTMH-SWSAV
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
Page 67 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
MD-POTMH
POTMH - Lower Potomac River Mesohaline
CH, SM Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
A TMDL established on 12/29/2010 addresses the nutrient load allocations for the entire POTMH segment. An older TMDL (2005) also still applies to the Breton Bay portion of this segment.
Agriculture
Dissolved Oxygen
MD-POTOH-TF-02140102
Potomac River Middle Tidal CH Tidal subsegment
Fishing PCBs in Fish Tissue TMDL approved 2008
TMDLs for the tidal portion of the Anacostia and Potomac Rivers were jointly developed between VA, DC, and MD. These TMDLs addressed tidal PCB listings in these MD watersheds: 02140101, 02140102, 02140201, and 02140205.
Upstream Source
Direct Measurement
MD-POTOH1
POTOH1 - Lower Potomac River Oligohaline
CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
MD-POTOH1
POTOH1 - Lower Potomac River Oligohaline
CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
Page 68 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POTOH1
POTOH1 - Lower Potomac River Oligohaline
CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
MD-POTOH1
POTOH1 - Lower Potomac River Oligohaline
CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Agriculture
Dissolved Oxygen
MD-POTTF
POTTF - Upper Potomac River Tidal Fresh
CH, MO, PG
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POTTF
POTTF - Upper Potomac River Tidal Fresh
CH, MO, PG
Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POTTF
POTTF - Upper Potomac River Tidal Fresh
CH, MO, PG
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POTTF
POTTF - Upper Potomac River Tidal Fresh
CH, MO, PG
Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 69 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POTMH-St.Inigoes_Creek-3
POTMH - Lower Potomac River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform Split out from a previous listing
2016
This downstream embayment within St. Inigoes Creek is still restricted to shellfish harvesting.
Manure Runoff
Direct Measurement
MD-021401030718-ST_MARYS_LAKE
St. Mary's River SM Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2004
Atmospheric Deposition - Toxics
Direct Measurement
MD-POTMH-St.Inigoes_Creek-1
POTMH - Lower Potomac River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform Split out from a previous listing
2016
The upstream area of St. Inigoes Creek is still exceeding the shellfish harvesting area criteria.
Manure Runoff
Direct Measurement
MD-POTMH-LOCUST_GROVE_COVE
POTMH - Lower Potomac River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Also known as St. Georges Creek.Manure Runoff
Direct Measurement
MD-POTMH-Carthagena_Creek-2
POTMH - Lower Potomac River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2016
TMDL approved in 2005. Recent data shows the upstream portion of Carthagena Creek as exceeding the shellfish harvesting area criteria.
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-POTMH-CHERRY_COVE_CREEK
POTMH - Lower Potomac River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Wastes from Pets
Direct Measurement
MD-POTMH-ST.PATRICKS_CREEK
POTMH - Lower Potomac River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
Page 70 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POTMH-St.Clements_Bay-1
POTMH - Lower Potomac River Mesohaline
SM Tidal Shellfish Area
Shellfishing Fecal Coliform Relisted 2012
TMDL approved in 2005. Most recent data shows that the shellfish bacteria standard is not being met. This listing has been split as station 1302001 is now not meeting criteria while 1302004 continues to meet criteria (See MD-POTMH-St.Clements_Bay2).
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-POTMH-Charleston_Creek
POTMH - Lower Potomac River Mesohaline
CH Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-POTMH-Chaptico_Bay
Wicomico River SM Tidal Shellfish Area
Shellfishing Fecal Coliform TMDL approved 2006
Manure Runoff
Direct Measurement
MD-POTOH2
POTOH2 - Port Tobacco River Oligohaline
CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (1999) also still applies.
Agriculture
Dissolved Oxygen
MD-POTOH2
POTOH2 - Port Tobacco River Oligohaline
CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (1999) also still applies.
Agriculture
Dissolved Oxygen
MD-POTOH2
POTOH2 - Port Tobacco River Oligohaline
CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (1999) also still applies.
Agriculture
Dissolved Oxygen
Page 71 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-POTOH2
POTOH2 - Port Tobacco River Oligohaline
CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (1999) also still applies.
Agriculture
Dissolved Oxygen
MD-POTOH3
POTOH3 - Nanjemoy Creek CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POTOH3
POTOH3 - Nanjemoy Creek CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POTOH3
POTOH3 - Nanjemoy Creek CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POTOH3
POTOH3 - Nanjemoy Creek CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-POTOH3-SWSAV
POTOH3 - Nanjemoy Creek CH Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
Page 72 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-MATTF
MATTF - Mattawoman Creek Tidal Fresh
CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-MATTF
MATTF - Mattawoman Creek Tidal Fresh
CH Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Agriculture
Dissolved Oxygen
MD-MATTF
MATTF - Mattawoman Creek Tidal Fresh
CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Agriculture
Dissolved Oxygen
MD-MATTF
MATTF - Mattawoman Creek Tidal Fresh
CH Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2005) also still applies.
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-POTTF-02140201
Potomac River Upper tidal PG, CH Tidal subsegment
Fishing PCBs in Fish Tissue TMDL approved 2008
TMDLs for the tidal portion of the Anacostia and Potomac Rivers were jointly developed between VA, DC, and MD. These TMDLs addressed tidal PCB listings in these MD watersheds: 02140101, 02140102, 02140201, and 02140205.
Upstream Source
Direct Measurement
Page 73 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02140202
Potomac River Montgomery County
FR, MO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2014
The Biostressor analysis indicated that sediment is a major stressor affecting biological integrity in this watershed. The TMDL and listing for sediment addresses a portion of the biological impairment listing.
Crop Production (Crop Land or Dry Land)
85%
Habitat Evaluation
MD-PISTF
PISTF - Piscataway Creek tidal Fresh
PG Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PISTF
PISTF - Piscataway Creek tidal Fresh
PG Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-02140203
Piscataway Creek PG Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2008
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-PISTF
PISTF - Piscataway Creek tidal Fresh
PG Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
MD-PISTF
PISTF - Piscataway Creek tidal Fresh
PG Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
Dissolved Oxygen
Page 74 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-PISTF
PISTF - Piscataway Creek tidal Fresh
PG Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2012
The SAV restoration goal is not being met and no water clarity data are available. This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010.
Source Unknown
SAV and Water Clarity
MD-02140205
Anacostia River MO, PG Non-tidal 8-digit watershed
Aquatic Life and Wildlife Nitrogen, Total TMDL approved 2009
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-02140205
Anacostia River MO, PG Non-tidal 8-digit watershed
Water Contact Sports Trash TMDL approved 2012
Illegal Dumps or Other Inappropriate Waste Disposal
Direct Measurement
MD-02140205
Anacostia River MO, PG Non-tidal 8-digit watershed
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD)
TMDL approved 2009
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2008) also still applies.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Nitrogen, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2008) also still applies.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
Page 75 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02140205
Anacostia River MO, PG Non-tidal 8-digit watershed
Water Contact Sports Enterococcus TMDL approved 2008
Wastes from Pets
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Seasonal Shallow-Water Submerged Aquatic Vegetation Subcategory
Total Suspended Solids (TSS)
TMDL approved 2008
A joint TMDL developed in cooperation with DC was approved for both the tidal and nontidal portions of the Anacostia that addressed the sediment/TSS impairment.
Channel Erosion/Incision from Upstream Hydromodifications
Water Clarity
MD-ANATF-02140205
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Fishing PCBs in Fish Tissue TMDL approved 2008
TMDLs for the tidal portion of the Anacostia and Potomac Rivers were jointly developed between VA, DC, and MD. These TMDLs addressed tidal PCB listings in these MD watersheds: 02140101, 02140102, 02140201, and 02140205.
Upstream Source
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2008) also still applies.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Biochemical Oxygen Demand (BOD)
TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2008) also still applies.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Open-Water Fish and Shellfish Subcategory
Phosphorus, Total TMDL approved 2012
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2008) also still applies.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
Page 76 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Seasonal Migratory Fish Spawning and Nursery Subcategory.
Biochemical Oxygen Demand (BOD)
TMDL approved 2010
This specific waterbody-pollutant combination was addressed by a TMDL established on 12/29/2010. An older TMDL (2008) also still applies.
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Water Contact Sports Enterococcus TMDL approved 2008
Reestablished as separate listing from non tidal portion in 2004. TMDL approved on 9/19/06.
Wastes from Pets
Direct Measurement
MD-ANATF
ANATF - Anacostia River Tidal Fresh
PG Chesapeake Bay segment
Water Contact Sports Trash TMDL approved 2012
Illegal Dumps or Other Inappropriate Waste Disposal
Direct Measurement
MD-02140205-Mainstem2
Anacostia River MO, PG River Mainstem
Fishing Polychlorinated biphenyls (PCBs)
TMDL approved 2012
The extent of this listing was changed in 2014 to reflect the mainstem (including Northeast and Northwest main Branches) of the Anacostia downstream to the head of tide. Fish tissue and water data included in this assessment.
Urban Runoff/Storm Sewers
Direct Measurement
MD-02140205
Anacostia River MO, PG Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2008
A joint TMDL developed in cooperation with DC was approved for both the tidal and nontidal portions of the Anacostia that addressed the sediment/TSS impairment. TMDL approved by EPA on 7/24/07. This listing replaces the biological listing.
Urban Runoff/Storm Sewers
73%
Habitat Evaluation
MD-02140205
Anacostia River MO, PG Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2009
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Direct Measurement
Page 77 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02140206
Rock Creek MO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
The Biostressor analysis indicated that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL for sediment addresses the biological impairment for this watershed.
Urban Runoff/Storm Sewers
78%
Habitat Evaluation
MD-02140206
Rock Creek MO Non-tidal 8-digit watershed
Water Contact Sports Enterococcus TMDL approved 2008
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-02140206
Rock Creek MO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
Discharges from Municipal Separate Storm Sewer Systems (MS4)
Dissolved Oxygen
MD-02140207
Cabin John Creek MO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2011
The Biostressor analysis indicated that TSS is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Urban Runoff/Storm Sewers
58%
Habitat Evaluation
MD-02140207
Cabin John Creek MO Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2008
Sanitary Sewer Overflows (Collection System Failures)
Direct Measurement
MD-021402080857-Clopper_Lake
Seneca Creek MO Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2002
Urban Runoff/Storm Sewers
Unknown
Page 78 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021402080857-Clopper_Lake
Seneca Creek MO Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2002
Urban Runoff/Storm Sewers
Dissolved Oxygen
MD-02140208
Seneca Creek MO Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2011
The Biostressor analysis indicated that TSS is a major stressor affecting biological integrity in this watershed. The TMDL for TSS addresses a portion of the biological impairment listing.
Urban Runoff/Storm Sewers
16%
Habitat Evaluation
MD-02140302-LAKE_LINGANORE
Lower Monocacy River FR Impoundments
Aquatic Life and Wildlife Sedimentation/siltation TMDL approved 2004
Agriculture
Unknown
MD-02140302
Lower Monocacy River CR, FR, MO
Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-02140302
Lower Monocacy River CR, FR, MO
Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
Crop Production (Crop Land or Dry Land)
Dissolved Oxygen
MD-02140302
Lower Monocacy River CR, FR, MO
Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2009
The Biostressor analysis indicated that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL for sediment addresses the biological impairment.
Agriculture71%
Habitat Evaluation
MD-02140302-LAKE_LINGANORE
Lower Monocacy River FR Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2004
Municipal Point Source Discharges
Dissolved Oxygen
Page 79 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02140303
Upper Monocacy River CR, FR Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
The Biostressor analysis indicates that excess phosphorus is a major stressor affecting biological integrity in this watershed. The TMDL and listing for phosphorus addresses a portion of the biological impairment listing.
Crop Production (Crop Land or Dry Land)
39%
Dissolved Oxygen
MD-02140303
Upper Monocacy River CR, FR Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Manure Runoff
Direct Measurement
MD-02140303
Upper Monocacy River CR, FR Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2010
The Biostressor analysis indicates that excess sediments (TSS) are a major stressor affecting biological integrity in this watershed. The TMDL and listing for TSS addresses a portion of the biological impairment listing.
Agriculture51%
Habitat Evaluation
MD-02140304
Double Pipe Creek CR, FR Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Wastes from Pets
Direct Measurement
MD-02140304
Double Pipe Creek CR, FR Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
The Biostressor analysis indicates that excess phosphorus is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Agriculture78%
Dissolved Oxygen
MD-02140304
Double Pipe Creek CR, FR Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2009
The Biostressor analysis indicates that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL for sediment addresses a portion of the biological impairment listing.
Agriculture75%
Habitat Evaluation
Page 80 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02140305
Catoctin Creek FR Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
The Biostressor analysis indicates that excess phosphorus is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Crop Production (Crop Land or Dry Land)
82%
Dissolved Oxygen
MD-02140305
Catoctin Creek FR Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2009
Crop Production (Crop Land or Dry Land)
Habitat Evaluation
MD-02140501
Potomac River Washington County
WA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2012
The Biostressor analysis indicated that sediment is a major stressor affecting biological integrity in this watershed. The TMDL for sediment addresses a portion of the biological impairment listing.
Agriculture73%
Habitat Evaluation
MD-02140502
Antietam Creek WA Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-02140502
Antietam Creek WA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2014
The Biostressor analysis indicates that excess phosphorus is a major stressor affecting biological integrity in this watershed. The TMDL for phosphorus addresses a portion of the biological impairment listing.
Crop Production (Crop Land or Dry Land)
20%
Dissolved Oxygen
MD-02140502
Antietam Creek WA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2009
The Biostressor analysis indicates that sediments are a major stressor affecting biological integrity in this watershed. The TMDL for sediment addresses a portion of the biological impairment listing.
Crop Production (Crop Land or Dry Land)
45%
Habitat Evaluation
Page 81 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02140504
Conococheague Creek WA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2009
The Biostressor analysis indicates that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL and listing for sediment addresses a portion of the biological impairment listing.
Agriculture84%
Habitat Evaluation
MD-02140504
Conococheague Creek WA Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
Wastes from Pets
Direct Measurement
MD-02141002
Evitts Creek AL Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2008
The Biostressor analysis indicated that TSS is a major stressor affecting biological integrity in this watershed. The TMDL for TSS thus addresses a portion of the biological impairment listing.
Agriculture37%
Habitat Evaluation
MD-02141003
Wills Creek AL, GA Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2008
Combined Sewer Overflows
Direct Measurement
MD-021410030099-UT2_JENNINGS_RUN
Wills Creek AL, GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This segment flows downstream between Morantown and Slabtown.
Acid Mine Drainage
Direct Measurement
MD-021410030098-UT3_JENNINGS_RUN
Wills Creek AL, GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Impairment is limited to the stream segment represented by station 60/UJN0005 (not whole 12-digit watershed). Segment crosses Beartrack Farm Road.
Acid Mine Drainage
Direct Measurement
Page 82 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021410030099-UT1_JENNINGS_RUN
Wills Creek AL, GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This segment flows downstream toward Mount Savage.
Acid Mine Drainage
Direct Measurement
MD-02141003
Wills Creek AL, GA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2008
The Biostressor analysis indicated that TSS is a major stressor affecting biological integrity in this watershed. The TMDL for TSS addresses a portion of the biological impairment listing.
Urban Runoff/Storm Sewers
31%
Habitat Evaluation
MD-021410030099-JENNINGS_RUN
Wills Creek AL, GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
These segments flow downstream and cross Sugar Row Road.
Acid Mine Drainage
Direct Measurement
MD-021410040088-UT_Moores_Run
Georges Creek AL Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR to provide greater geographic specificity. The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Acid Mine Drainage34%
Direct Measurement
MD-02141004
Georges Creek AL, GA Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2008
Combined Sewer Overflows
Direct Measurement
MD-021410040093-Winebrenner_Run
Georges Creek AL Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Impaired segment identified by TMDL monitoring. The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Acid Mine Drainage34%
Direct Measurement
Page 83 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021410040089-Jackson_Run
Georges Creek AL Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Impaired segments identified by TMDL monitoring.The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Acid Mine Drainage34%
Direct Measurement
MD-02141004
Georges Creek AL, GA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2006
The Biostressor analysis indicates that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL and listing for sediment addresses a portion of the biological impairment listing.
Urban Runoff/Storm Sewers
37%
Habitat Evaluation
MD-021410040089-Mill_Run
Georges Creek AL, GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Impaired segments identified by TMDL monitoring.The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Acid Mine Drainage34%
Direct Measurement
MD-021410040092-Staub_Run
Georges Creek AL, GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Divided into smaller more spatially accurate listings for the 2012 IR. The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Atmospheric Deposition - Acidity
34%
Direct Measurement
MD-021410040088-UT_Georges_Creek
Georges Creek AL Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Listing scale refined by TMDL. The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Acid Mine Drainage34%
Direct Measurement
Page 84 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021410040091-Matthew_Run
Georges Creek AL Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Impaired segment identified by TMDL monitoring.The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. This listing replaces the biological listing.
Acid Mine Drainage34%
Direct Measurement
MD-021410050050-Laurel_Run_north
Upper North Branch Potomac River
GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-021410050049-Elklick_Run
Upper North Branch Potomac River
GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-02141005
Upper North Branch Potomac River
AL, GA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2008
Livestock (Grazing or Feeding Operations)
Habitat Evaluation
MD-021410050047-Wolfden_Run
Upper North Branch Potomac River
GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
Page 85 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021410050047-Short_Run
Upper North Branch Potomac River
GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-021410050046-N_Prong_Lostland_Run
Upper North Branch Potomac River
GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-021410050046-S_Prong_Lostland_Run
Upper North Branch Potomac River
GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-021410050039-Laurel_Run
Upper North Branch Potomac River
GA Subwatershed
Aquatic Life and Wildlife Iron TMDL approved 2012
Acid Mine Drainage
Direct Measurement
MD-021410050048-Three_Forks_Run
Upper North Branch Potomac River
GA Subwatershed
Aquatic Life and Wildlife Iron TMDL approved 2012
Acid Mine Drainage
Direct Measurement
MD-021410050048-Three_Forks_Run
Upper North Branch Potomac River
GA Subwatershed
Aquatic Life and Wildlife Aluminum TMDL approved 2012
Acid Mine Drainage
Direct Measurement
Page 86 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-02141005-Mainstem_aboveJR_Lake
Upper North Branch Potomac River
AL, GA Non-tidal Segment(s)
Aquatic Life and Wildlife Iron TMDL approved 2012
Acid Mine Drainage
Direct Measurement
MD-021410050048-Three_Forks_Run_part
Upper North Branch Potomac River
GA Subwatershed
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-021410050039-Laurel_Run
Upper North Branch Potomac River
GA Subwatershed
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-021410050039-Laurel_Run
Upper North Branch Potomac River
GA Subwatershed
Aquatic Life and Wildlife Aluminum TMDL approved 2012
Acid Mine Drainage
Direct Measurement
MD-021410050043-Glade_Run
Upper North Branch Potomac River
GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
The Biostressor analysis indicates that low pH is a major stressor affecting biological integrity in this watershed. The TMDLs for pH address a portion of the biological impairment listing.
Acid Mine Drainage32%
Direct Measurement
MD-021410060078-Miller_Run
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Atmospheric Deposition - Acidity
Direct Measurement
Page 87 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021410060075-UTAaron_Run2
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low Split out from a previous listing
2014
This side tributary to Aaron Run was split out from the mainstem low pH assessment record (2014) to reflect the fact that this segment requires more data to confirm delisting.
Acid Mine Drainage
Direct Measurement
MD-021410060079-Poplar_Lick_Run
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Atmospheric Deposition - Acidity
Direct Measurement
MD-021410060077-Savage_Reservoir
Savage River GA Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2004
Atmospheric Deposition - Toxics
Direct Measurement
MD-021410060077-Pine_Swamp_Run
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Acid Mine Drainage
Direct Measurement
MD-021410060081-Little_Savage_River
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Atmospheric Deposition - Acidity
Direct Measurement
MD-021410060075-UTAaron_Run1
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low Split out from a previous listing
2014
This side tributary to Aaron Run was split out from the mainstem low pH assessment record (2014) to reflect the fact that this segment requires more data to confirm delisting.
Acid Mine Drainage
Direct Measurement
MD-021410060078-Big_Run
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Atmospheric Deposition - Acidity
Direct Measurement
Page 88 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-021410060075-UT_Savage_River
Savage River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Acid Mine Drainage
Direct Measurement
MD-050202010009-Murley_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010010-Muddy_Creek
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010009-Herrington_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010005-Snowy_Creek
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
Page 89 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-050202010016-UT_Little_Bear_Creek
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010008-Toliver_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010010-Ned_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-05020201
Youghiogheny River GA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2006
The Biostressor analysis indicates that excess sediment is a major stressor affecting biological integrity in this watershed. The TMDL and listing for sediment addresses a portion of the biological impairment listing.
Livestock (Grazing or Feeding Operations)
35%
Habitat Evaluation
MD-050202010017-Trap_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
Page 90 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-050202010002-Cherry_Creek
Youghiogheny River GA Non-tidal Segment(s)
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
listing is for upstream of station CHC0008Livestock (Grazing or Feeding Operations)
Direct Measurement
MD-050202010014-White_Rock_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010021-UT_Mill_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010014-White_Rock_Glade
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010005-Cherry_Bottom_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
Page 91 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-050202010019-Buffalo_Run1
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010019-NorthBranch_Laurel_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010017-Laurel_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010016-UT_Bear_Creek
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202010019-UT_Glade_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
Page 92 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-050202010008-Millers_Run
Youghiogheny River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous aggregated pH impairment listing for the Youghiogheny. The size of water listed as impaired and addressed in the TMDL has not changed.
Acid Mine Drainage32%
Direct Measurement
MD-050202020026-Broadford_Lake
Little Youghiogheny River GA Impoundments
Aquatic Life and Wildlife Phosphorus, Total TMDL approved 2000
Agriculture
Dissolved Oxygen
MD-05020202
Little Youghiogheny River GA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Total Suspended Solids (TSS)
TMDL approved 2008
Agriculture
Habitat Evaluation
MD-05020202
Little Youghiogheny River GA Non-tidal 8-digit watershed
Water Contact Sports Escherichia coli (E. Coli) TMDL approved 2009
On-site Treatment Systems (Septic Systems and Similar Decentralized Systems)
Direct Measurement
MD-05020202
Little Youghiogheny River GA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD), carbonaceous
TMDL approved 2002
Municipal Point Source Discharges
Direct Measurement
MD-05020202
Little Youghiogheny River GA Non-tidal 8-digit watershed
Aquatic Life and Wildlife Biochemical Oxygen Demand (BOD), nitrogenous
TMDL approved 2002
Municipal Point Source Discharges
Direct Measurement
Page 93 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-050202030029-Cherry_Creek
Deep Creek Lake GA Subwatershed
Aquatic Life and Wildlife pH, Low TMDL approved 2004
The Biostressor analysis indicated that low pH is a major stressor affecting biological integrity in Cherry Creek. The TMDL for pH in Cherry Creek addresses a portion of the biological impairment listing.
Acid Mine Drainage45%
Direct Measurement
MD-05020203-Deep_Creek_Lake
Deep Creek Lake GA Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2004
Atmospheric Deposition - Toxics
Direct Measurement
MD-050202040035-Meadow_Run
Casselman River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous watershed pH listing. The size of water listed as impaired and addressed in the TMDL has not changed. The BSID indicated that pH is a major stressor to biological integrity in this watershed.
Acid Mine Drainage62%
Direct Measurement
MD-050202040034-Little_Shade_Run
Casselman River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous watershed pH listing. The size of water listed as impaired and addressed in the TMDL has not changed. The BSID indicated that pH is a major stressor to biological integrity in this watershed.
Acid Mine Drainage62%
Direct Measurement
MD-050202040033-Little_Laurel_Run
Casselman River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
Restoration activities implemented by MDE show two years of meeting pH standards but cannot delist until it is meeting standards for three consecutive years. Need one more year of data.
Acid Mine Drainage62%
Direct Measurement
Page 94 of 95Category 4a Waters10-Apr-19 FINAL FINAL
Assessment Unit
Basin Name County Water Type Detail
Reason For RemovalCause Cycle Delisted
Notes
Designated Use
Pollution Sources
Indicator
Percent Attributable Risk
Basin Code
MD-050202040031-SouthBranch_Casselman_River1
Casselman River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous watershed pH listing. The size of water listed as impaired and addressed in the TMDL has not changed. The BSID indicated that pH is a major stressor to biological integrity in this watershed.
Acid Mine Drainage62%
Direct Measurement
MD-050202040030-NorthBranch_Casselman_River
Casselman River GA Non-tidal Segment(s)
Aquatic Life and Wildlife pH, Low TMDL approved 2008
This listing was split out in the 2014 IR from the previous watershed pH listing. The size of water listed as impaired and addressed in the TMDL has not changed. The BSID indicated that pH is a major stressor to biological integrity in this watershed.
Acid Mine Drainage62%
Direct Measurement
MD-050202040038-Big_Piney_Reservoir
Casselman River GA Impoundments
Fishing Mercury in Fish Tissue TMDL approved 2004
Atmospheric Deposition - Toxics
Direct Measurement
Page 95 of 95Category 4a Waters10-Apr-19 FINAL FINAL
