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WATER QUALITY & SAFETY IN GRAND RAPIDS
Eric DeLongDeputy City Manager
• DRINKING WATER
• WATER RESOURCE RECOVERY
• STORMWATER
• SURFACE WATER/GROUNDWATER
HERE’S OUR QUALITY FOCUS
HERE’S WHY WATER MATTERS
• PUBLIC HEALTH
• FOOD PROCESSING
• BEER CITY
• ENVIRONMENTAL QUALITY
• RECREATION
DRINKING WATER &WATER RESOURCE RECOVERY FACILITY
PARTNERSHIPSAWARDS & RECOGNITIONS
DRINKING WATER
• The Lake Michigan Filtration Plant was built in 1962 and with an expansion in 1989, total production capacity was pushed to 135 million gallons a day (MGD).
• Over the past twenty years, water demands in the system have varied with annual average pumpage rates ranging from 34 MGD to 45 MGD. The maximum daily pumpage rates during this period have ranged from 62 MGD to 96 MGD.
• The Lake Michigan Filtration Plant treats and pumps 13.351 billion gallons of water to our customers annually, or an average of 36.5 million gallons a day.
• The plant serves roughly 300,000 customers with a service area of 137 square miles.
• Annual
LAKE MICHIGAN FILTRATION PLANT
June 2018, the Michigan Department of Environmental Quality released new regulatory changes pertaining to the Lead and Copper Rule (LCR) as follows:
• The lead action level to be lowered from 15 ppb to 12 ppb, effective 2025.
• Partial lead service line replacement is no longer allowed, except in the case of an emergency repair.
• Water supplies must replace all lead service lines at an average of 5% per year or in accordance to an approved asset management plan.
• The full lead service line must be replaced at water supply expense, regardless of ownership.
• A statewide advisory council will be created to assist with development of public awareness campaign materials. Supplies serving more than 50,000 people, a community advisory board council must be established to assist with development of public awareness campaign materials.
NEW LEAD REGULATIONSREDUCE LEAD RISKS THROUGH THE LEAD AND COPPER RULE
Maximum Contaminant Level Goal- The level of a contaminant in drinking water below which thereis no known or expected risk to health.Action Level (AL)- The concentration of contaminant which, if exceeded, triggers treatment.The 90th percentile no more than 10 percent of your samples can be above action level.
One of the primary sources of lead and copper contamination in drinking water is associated with the corrosion of piping and solder. Corrosion (a chemical reaction causing the dissolution of a material into its environment) of pipes and solder can cause
lead and copper concentrations to increase as the metals are leached into the water supply.
Since the introduction of corrosion control treatment, lead levels have remained consistently low.
LEAD IN WATER
Monitored and tested 24 hours a day, 7 days a week bylicensed water plant operators
Supervisory Control and Data Acquisition (SCADA) is asystem of software and hardware that allows us to:
• Control processes locally or at remote locations.• Monitor, gather and process real-time data.• Distinguish between normal and abnormal operation.• Directly interact with sensors, valves, pumps, and
motors.
WATER QUALITY MONITORING - LMFP
Corrosion Control Study
The City is conducting a corrosion control optimization study of our treated water.We are looking at different blends of phosphates, chlorine and Ph levels, andvariation of products to best minimize our customers exposure to lead in drinkingwater.
Lead Service Line Replacement (LSLR) Program*
In April of 2017, the City enacted administrative policy #17-01 for full leadservice line replacement (LSLR) at NO cost to homeowners. The policy requiresreplacement of any lead service line in the event of disturbance; during aconstruction project or failure on a service line (public or private).
Since adoption, there has been 587 full LSLRs:• 301 due to emergency leaks• 286 due to construction projects• 111 pending through the 2018 project season
*Program will require little adaptation to new lead regulations
OUT IN FRONT
Utilities systems are responsible for managing the infrastructure in respect to health and safety of the public. Managing these assets helps us identify and address the deficiencies and deterioration of our infrastructure that can threaten the ability of the system to provide a safe and reliable service.
Comprehensive Master Plan is a 20 year planning document updated every 5 years. It provides planning information for the orderly growth and maintenance to assure a continuous and ample supply of water which meets federal and state drinking water standards.
Capital Improvement Plan is a 5 year plan that is updated annually. It captures the necessary capital improvement budgets for all water system assets, either through replacement, expansion or optimization.
Asset Management Plan is a tool for water systems to plan for future financial needs, estimate the full cost of water service, and to ensure a sustainable utility.
Booster Pump Station
Storage Tanks
ASSET MANAGEMENT PLANNING
WATER RESOURCE RECOVERY
• DESIGN 61.1 MGD
• WET WEATHER PEAK 90 MGD
• AVG. DAILY 40 MGD
• 270,000 SERVED
• 80,000 RETAIL CUSTOMERS
• 11 CUSTOMER COMMUNITIES
• 1100+ MILES OF SEWER LINES
• 400+ MILES OF STORM LINES
WATER RESOURCE RECOVERY FACILITY
COMBINED SEWER OVERFLOW (CSO) PROJECT
• 1969 - 12.6 billion gallons of raw, untreated sewage flowed into the Grand River
• Today - 0
• $400 million
• 59 CSO points eliminated
• Completed in 2015, 4 years ahead of schedule
INNOVATION WITH PARTNERS:FOUNDERS BREWING, COFounders wastewater is high in biochemical oxygen demand (BOD)
To handle the increased BOD, a two-mile-long, 10-inch pipe was installed under Market Ave Founders directly to WRRF
140,000 gallons a day
• Equalize Plant Loadings
• Reduce Biochemical Oxygen Demand (BOD) via Digestion
• Carbon recovery through Methane Production
• Combined, Power and Heat
BIODIGESTION
STORMWATERSurface Water/Groundwater
STORMWATER MANAGEMENTGreen Infrastructure tools are used to mimic the natural water cycle
Rain Gardens
Porous Pavement
Bioretention Islands
Retention BasinsBioswales
STORMWATER MANAGEMENT - FUTUREDAYLIGHTING
RIVER RESTORATION
GREEN INFRASTRUCTURE
GUIDANCE
• REAL TIME WATER QUALITY MONITORING
• SWMM STORM SEWER MODELING
• GRAND RIVER WATER QUALITY MODEL BY LIMNOTECH
• TARGETED TMDL IMPLEMENTATION
SMART WATERSHED
STORMWATER PLAN - KNAPP’S CORNER PHASE IIOptions
• Transport to Grand River cost $6 million
• Alternative stormwater discharge locations -Chloride use reduction Pilot
Alternatives provided by Prein & Newhof
PFAS
DRINKING WATER PFAS REGULATIONS & TEST RESULTS
• No regulatory drinking water standard exists for PFAS chemicals.
• In 2016, the EPA set a lifetime health advisory level of 70 PPT, combined, for two PFAS in drinking water: perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS).
• Michigan set a State standard of 70 PPT for PFAS in drinking water on January 9, 2018.
• Testing in 2014, 2015, and 2017, indicated non-detectable levels for PFAS in city drinking water.
• In 2018, as test methods improved, the MDEQ and the City sampled the water system’s Lake Michigan source water and tap water.
• Results from tests were well below current PFAS safety standards and those being discussed. Of the multiple tests conducted, PFAS levels ranged from non-detect to 3 ppt.
• PFAS levels will remain relatively consistent since Lake Michigan is a stable source of our drinking water.
• We’ll continue to aggressively sample and test our drinking water. PFAS test results are shared publicly on the city website.
EPA & MDEQ Lifetime Health Advisory Limit = 70 ppt
1 ppt = 1 droplet in 18 million gallons of water
PFAS AT WATER RESOURCE RECOVERY FACILITY (WRRF)
• Develop PFAS Minimization Program
• Test Influent, Biosolids and Effluent
• Identify Potential Sources
• Control/Permit Sources
• Establish Domestic Background
