River Water Quality in Hong Kong in 2001 · Appendix 2 Water quality parameters and analytical methods ꩥ River Water Quality in Hong Kong in 2001 A2 - 1 Appendix 2.1 Summary of

河 River Water Quality in Hong Kong in 2001 A - 1

Appendices

Appendix 1 Monitoring stations & sampling frequencies

河 River Water Quality in Hong Kong in 2001 A1 - 1

Appendix 1 Summary of river water quality monitoring stations and sampling frequencies in 2001

Water Control

Zone Watercourse Monitoring station

No. of monitoring

stations

Sampling frequency

Tolo Harbour

and Channel

Shing Mun River Shing Mun Main Channel Fo Tan Nullah Siu Lek Yuen Nullah Kwun Yam Shan Stream Tai Wai Nullah Tin Sum Nullah Lam Tsuen River Tai Po River Tai Po Kau Stream Shan Liu Stream Tung Tze Stream

TR19I TR17, TR17L TR23A, TR23L KY1 TR19, TR19A, TR19C TR20B TR12, TR12B, TR12C, TR12D, TR12E, TR12F, TR12G, TR12H, TR12I TR13 TR14 TR4 TR6

1 2 2 1 3 1 9 1 1 1 1

Monthly

Southern Mui Wo River MW1, MW2, MW3, MW4, MW5 5 Monthly

Port Shelter

Ho Chung River Sha Kok Mei Stream Tai Chung Hau Stream

PR1, PR2 PR5, PR6 PR7, PR8

2 2 2

Monthly

Junk Bay Tseng Lan Shue Stream JR3, JR6, JR11 3 Monthly

Deep Bay

River Indus River Beas River Ganges Yuen Long Creek Kam Tin River Tin Shui Wai Nullah Fairview Park Nullah Deep Bay streams

Ha Pak Nai Stream Tai Shui Hang Stream Pak Nai Stream Sheung Pak Nai Stream Ngau Hom Sha Stream Tsang Kok Stream

IN1, IN2, IN3 RB1, RB2, RB3 GR1, GR2, GR3 YL1, YL2, YL3, YL4 KT1, KT2 TSR1, TSR2 FVR1 DB1 DB2 DB3 DB5 DB6 DB8

3 3 3 4 2 2 1 1 1 1 1 1 1

Monthly

North Western

Tuen Mun River Tung Chung River

TN1, TN2, TN3, TN4, TN5, TN6 TC1, TC2, TC3

6 3 Monthly

Western Buffer

Pai Min Kok (Anglers’) Stream

AN1, AN2 2 Monthly

Victoria Harbour

Sam Dip Tam Stream Kau Wa Keng Stream Kai Tak Nullah

TW1, TW2, TW3 KW3 KN1, KN4, KN5, KN7 KN2, KN3

3 1 4 2

Monthly Monthly Monthly

3-monthly

Total 35 - 82 -

Appendix 2 Water quality parameters and analytical methods


Appendix 2.1 Summary of the parameters and analytical methods in the river water quality monitoring programme

Parameter Reporting Limit Unit Analytical Method Analysed by Purpose

1. Physical and aggregate properties

Conductivity 1 µS/cm

Dissolved oxygen 0.1 mg/L

pH 0.1 pH unit

Water temperature 0.1 °C

Multi-parameter water quality data logger, model YSI-6820 (on-site measurement)

EPD Show general conditions of the river.

Flow 1 L/s Electromagnetic flow meter, model Flo-mate 2000 (on-site measurement)

EPD

Measure rate of river flow which relates to dilution and dispersion of pollutants.

Total suspended solids 0.5 mg/L In-house method WC-IN-19, based on APHA

20ed 2540 D

Total solids 0.5 mg/L In-house method WC-IN-9, based on APHA 20ed 2540 B

Total volatile solids 0.5 mg/L In-house method WC-IN-9, based on APHA 20ed 2540 E

Government Laboratory

Turbidity 0.1 NTU Multi-parameter water quality data logger, model YSI-6820 (on-site measurement)

EPD

Indicate the amount of solids in the water, opacity of the river.

2. Aggregate organics

5-day Biochemical Oxygen Demand (BOD5)

0.1 mg/L In-house method based on APHA 18ed 5210 B EPD

Chemical Oxygen Demand (COD) 2 mg/L In-house method WH-OA-3 (A) & (B), based

on ASTM D1252-88 A & B (CODCr )

Total Organic Carbon (TOC) 1 mg/L In-house method WC-IN-22, based on APHA

20ed 5310 B

Oil and grease 0.5 mg/L In-house method WC-IN-7, based on APHA 20ed 5520 C (IR)


Measure organic pollutants and oxygen demanding materials as well as oil and grease.

3. Faecal bacteria

E. coli 1

cfu/100mL (cfu:

colony forming

unit)

Faecal coliforms 1 cfu/100mL

Ho, B.S.W. and Tam, T.Y. (1997). Enumeration of E. coli in environmental waters and wastewater using a chromogenic medium. Wat. Sci. Tech., 35, 409-413. DoE and DHSS (1983). “The bacteriological examination of drinking water supplies 1982. Report on Public Health and Medical Subjects No. 71. Methods for the Examination of Waters and Associated Materials”. Department of Environment, Department of Health and Social Security, Public Health Laboratory Service, H.M.S.O. London.

EPD

Indicate faecal contamination of river by animal wastes and domestic sewage.

Reference notes: 1. APHA - American Public Health Association: Standard Methods for the Examination of Water and Wastewater. 2. ASTM - Annual Book of American Society for the Testing and Materials Standards, Vol. 11.01 & 11.02.



Appendix 2.2 Summary of the parameters and analytical methods in the river water quality monitoring programme (continued)


4. Nutrients and inorganic constituents

Nitrogen

Ammonia-nitrogen (NH3-N) 0.005 mg/L In-house method WC-IN-2, based on ASTM

D3590-89 B (FIA)

Nitrite-nitrogen (NO2-N) 0.002 mg/L In-house method WC-IN-4, based on APHA

20ed 4500-NO2- B (FIA)

Nitrate-nitrogen (NO3-N) 0.002 mg/L In-house method WC-IN-4, based on APHA

20ed 4500-NO3- F & I (FIA)

Total Kjeldahl nitrogen (soluble; soluble & particulate)

0.05 mg/L In-house method WC-IN-1 & 2, based on ASTM D3590-89 B (FIA) & APHA 20ed 4500-N A&D (FIA)

Phosphorus

Ortho-phosphate as phosphorus (PO4-P)

0.002 mg/L In-house method WC-IN-3, based on ASTM D515-88 B (FIA)

Total phosphorus (soluble ; soluble & particulate)

0.02 mg/L In-house method WC-IN-1 & 3, based on ASTM D515-88 B (FIA) & APHA 20ed 4500-P G (FIA)

Silicon

Molybdate-reactive silica 0.05 mg/L In-house method WC-IN-5, based on APHA

20ed 4500-SiO2 C&E (FIA)


Measure the amount of plant nutrients and the extent of eutrophication in the water.

Cyanide 0.01 mg/L In-house method WC-IN-8(A), based on ASTM D4374-93 (FIA, amperometric)

Anionic surfactants (as Manoxol OT) 0.05 mg/L

In-house method WH-OA-6, based on BS 6068, Section 2.23 (1986) (Colorimetric) & In-house method WC-IN-24, based on Abbott, D.C. “Analyst”, Vol.87, p.286(1962) & S. Motomizu et al., “Analyst” Vol.113, p.747(1988) (FIA)

Fluoride 0.2 mg/L In-house method WC-IN-18(A), based on APHA 20ed 4500-F- C & G (Ion Selective Electrode) and ASTM D1179-93 (FIA)

Free hydrogen sulphide 0.01 mg/L In-house method WC-IN-17, based on APHA

20ed 4500S2- D (Colorimetric)

Sulphide (soluble ; soluble & particulate)

0.02 mg/L In-house method WC-IN-17, based on APHA 20ed 4500S2- D (Colorimetric)


Reflect anoxic state of the rivers, as well as pollution caused by detergents and other inorganic chemicals.




Appendix 2.3 Summary of the parameters and analytical methods in the river water quality monitoring programme (continued)


5. Biological examination

Chlorophyll-a 0.2 mg/m3 In house method WC-IN-6, based on APHA 20ed 10200H 2 (spectrophotometric)

Pheo-pigment 0.2 mg/m3 In house method WC-IN-6, based on APHA 20ed 10200H 2 (spectrophotometric)


Indicate the amount of algal biomass in river water.

6. Metals

Aluminium 50 µg/L

Antimony 1 µg/L

Arsenic 1 µg/L

Barium 1 µg/L

Beryllium 1 µg/L

Boron 50 µg/L

Cadmium 0.1 µg/L

Chromium 1 µg/L

Copper 1 µg/L

Iron 50 µg/L

Lead 1 µg/L

Manganese 10 µg/L

Mercury 1 µg/L

Molybdenum 2 µg/L

Nickel 1 µg/L

Silver 1 µg/L

Thallium 1 µg/L

Vanadium 2 µg/L

Zinc 10 µg/L

In-house method WC-ME-7, based on USEPA Method 6020A (ICP-MS)


Determine toxic metal pollution of the river caused by industrial discharges.


Appendix 3 Key Water Quality Objectives (WQOs) for inland waters

BOD5 COD SS* DO E. coli(mg/L) (mg/L) (mg/L) (mg/L) (cfu/100mL)

<= <= <= >= <=Shing Mun (A)Shing Mun (C)Shing Mun (F) 3 15 0a

Shing Mun (H)Shing Mun (I) 6.0 9.0 25Lam Tsuen (D) 3 15 0a

Tai Po (C)Other inland watersexcept Shing Mun (B),(D), (E), (G), LamTsuen (C) and Tai Po(A), (B)

6.0 9.0 25

Whole zone 3 15 1b

Mui Wo (C)Mui Wo (E)Other inland watersexcept Mui Wo (A),(B), (D), (F)

6.0 9.0 25

* : SS is calculated based on annual median.a : E. coli level is calculated as the running median of the 5 most recent consecutive samples taken at intervals between 7 and 21 days (or 14 and 42 days).b : E. coli level is calculated as the geometric mean of the 5 most recent consecutive samples taken at intervals between 7 and 21 days.c : E. coli level is calculated as the geometric mean of all samples collected in one calendar year.d : E. coli level is calculated as the running median of the 5 most recent consecutive samples taken at intervals between 7 and 21 days.

河 River Water Quality in Hong Kong in 2001 A3-1

Subzone (pH unit)>= and <=

30

pH

6.5 8.55

5

1000a

6.5 8.5 20

6.5 8.5

5

305

20

WCZ

Tolo Harbour andChannel

Tolo HarbourSupplementary

201000a

1000a30

30

4

Appendix 3.1 Summary of key Water Quality Objectives (WQOs) for different watercourses in the river monitoring programme

Southern 610c

Appendix 3 Key Water Quality Objectives (WQOs) for inland waters

BOD5 COD SS* DO E. coli(mg/L) (mg/L) (mg/L) (mg/L) (cfu/100mL)

<= <= <= >= <=Ho Chung (A) 6.5 8.5Other inland watersInland waters 1000d

IndusBeasGangesYuen Long & Kam Tin(Upper)Yuen Long & Kam Tin(Lower)Other inland waters 6.0 9.0Tuen Mun (C) 6.5 8.5 3 15Other inland watersexcept Tuen Mun (A),(B)Other inland waters

Inland waters

* : SS is calculated based on annual median.a : E. coli level is calculated as the running median of the 5 most recent consecutive samples taken at intervals between 7 and 21 days (or 14 and 42 days).b : E. coli level is calculated as the geometric mean of the 5 most recent consecutive samples taken at intervals between 7 and 21 days.c : E. coli level is calculated as the geometric mean of all samples collected in one calendar year.d : E. coli level is calculated as the running median of the 5 most recent consecutive samples taken at intervals between 7 and 21 days.


25

4

5

0d

1000d

30

6.0

1000b

20

9.0 5 30 25

305

6.5 8.53 15

Appendix 3.2 Summary of key Water Quality Objectives (WQOs) for different watercourses in the river monitoring programme

North Western

Western BufferVictoria Harbour(Phase One)

Deep Bay

Junk Bay

Port Shelter 610c

>= and <=WCZ Subzone

pH(pH unit)

6.0 9.0

Main Channel

Tolo Harbour

Shing Mun River

Siu Lek YuenNullah

Tai WaiNullah

Tin Sum

N

Fo Tan Nullah

Sha TinWo Che Estate

Lek Yuen Estate

Hin Keng Estate

Heung Fan Liu

Kuk Liu

HK SportsInstitute

Racecourse

City OneSha Tin

Hang SengSchool of Commerce

Kwong YuenEstate

Excellent

Bad

Fair

Very Bad

Good

TR19A3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR193

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR20B3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR19I3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Tin Sum Nullah

Excellent

Bad

Fair

Very Bad

Good

TR19C3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Appendix 5.1 Water Quality Index (WQI) of Shing Mun River and its tributaries

A5 -1

Appendix 5

Tolo

Harbour

and Channel W

ater Control Z

one

河R

iver Water Q

uality in Hong K

ong in 2001

A5 -2

河R

iver Water Q

uality in Hong K

ong in 2001

N

Fo Tan Nullah

Tolo Harbour

Main Channel

Shing Mun River

Siu LekYuen Nullah

Kwun Yam ShanNullah

Sha Tin

Tai WaiNullah

Tin Sum Nullah

Wo Che Estate

Lek Yuen Estate

Hin Keng Estate

Tai Wai Station

Heung Fan LiuKuk Liu

HK SportsInstitute

Fo Tan Station

Racecourse

City OneSha Tin

Hang SengSchool of Commerce

Kwong YuenEstate

Excellent

Bad

Fair

Very Bad

Good

TR23L3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR23A3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

KY13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR17L3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR173

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Appendix 5

Tolo

Harbour

and Channel W

ater Control Z

one

Appendix 5.2 Water Quality Index (WQI) of Shing Mun River and its tributaries (continued)

A5 -3

河R

iver Water Q

uality in Hong K

ong in 2001

N

Lam Tsuen River

Kau Liu Ha

Lam Tsuen Kuk

Tai Po HuiTinLiuHa

ToloHarbour

Tai Po

Lam Tsuen

Tai WoSheShan

Ping LongTai Mong Che

Pak Ngau Shek

Kam Shan

Shan TongTo YuenTung

Excellent

Bad

Fair

Very Bad

Good

TR12C3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR12D3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR12B3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR12H3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR12F3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR12G3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Appendix 5

Tolo

Harbour

and Channel W

ater Control Z

one

Appendix 5.3 Water Quality Index (WQI) of Lam Tsuen River and its tributaries

A5 -4

河R

iver Water Q

uality in Hong K

ong in 2001

NShui Wai

Tai Po Hui

Tai Po RiverTolo Harbour

Lam Tsuen River

Kam Shan

Excellent

Bad

Fair

Very Bad

Good

TR12E3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR123

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR12I3

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR133

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Lam Tsuen

Tai Po

Tai Wo

Shan TongTo Yuen

Tung

Ping LongTai Mong Che

Pak Ngau Shek

Tin LiuHa

SheShan

Kau Liu Ha

Lam Tsuen Kuk

Appendix 5

Tolo

Harbour

and Channel W

ater Control Z

one

Appendix 5.4 Water Quality Index (WQI) of Lam Tsuen River (continued) and Tai Po River and their tributaries

A5 -5

河R

iver Water Q

uality in Hong K

ong in 2001

N

Tung Tze Stream

Tai Po Kau Stream

Shan Liu StreamPlover Cove

Reservoir

Tolo Harbour

PloverCove

Excellent

Bad

Fair

Very Bad

Good

TR63

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TR143

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exExcellent

Bad

Fair

Very Bad

Good

TR43

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Tai Po

Ting Kok

CheungShue Tan

Ma Liu Shui

Lai Chi Hang

Ha Tei Ha

Appendix 5

Tolo

Harbour

and Channel W

ater Control Z

one

Appendix 5.5 Water Quality Index (WQI) of minor streams in the Tolo Harbour and Channel Water Control Zone

Excellent

Bad

Fair

Very Bad

Good

MW43

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

MW33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

N

Mui Wo River

Pak NganHeung

Tai TeiTong

Luk TeiTong

Wang Tong

Silver MineBay

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

MW13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

ChungHau

ButterflyHill

Ngan WanEstate

Mui WoSchool San

LungWai

Excellent

Bad

Fair

Very Bad

Good

MW53

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

MW23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Appendix 6

Southern Water C

ontrol Zone

A6 Appendix 6.1 Water Quality Index (WQI) of Mui Wo River and its tributaries -1

Appendix 7.1 Water Quality Index (WQI) of Ho Chung River and its tributaries

Ho Chung RiverTin Liu Hebe Haven

Wo Mei

N

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

PR13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

PR23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Ho ChungMarina Cove

Nam Pin Wai

Luk Mei Tsuen

Nam Wai

Sai Kung

KaiHam

Appendix 7

Port Shelter Water C

ontrol Zone

A7 -1

Excellent

Bad

Fair

Very Bad

Good

N

Sha KokMei

Sha Kok Mei Stream

Sai Kung

Sai Kung Hoi

Fu Tei Hau

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

PR53

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

PR63

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

PoliceStation

SportsGround

Sha Kok MeiTemporary

Housing AreaKap Pin Long

Tan CheungPo Lo Che

Appendix 7


ontrol Zone

A7 Appendix 7.2 Water Quality Index (WQI) of Sha Kok Mei Stream and its tributaries -2

Appendix 7.3 Water Quality Index (WQI) of Tai Chung Hau Stream and its tributaries

Tai ChungHau

Tai Chung Hau Stream

Hebe Haven

N

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

PR73

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exExcellent

Bad

Fair

Very Bad

Good

PR83

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Lion’s NatureEducation Centre

Wu Lei Tau

Ta Ho Tun

Pak KongVillage

Pak Sha Wan

Kau Sai San Tsuen

Ma On Shan Country Park

Appendix 7


ontrol Zone

A7 -3

Appendix 8.1 Water Quality Index (WQI) of Tseng Lan Shue Stream and its tributaries

N

Junk Bay

Tseng LanShue

Tseung Kwan O

Pak Shek Wo

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

JR113

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exExcellent

Bad

Fair

Very Bad

Good

JR33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exExcellent

Bad

Fair

Very Bad

Good

JR63

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Tseng Kwan OUpper VillageTai Ngau Wu

Pak Uk

Hebe Hill

Sam LongTsuen

Tseng Lan Shue Stream

Appendix 8

Junk Bay W

ater Control Z

one

A8 -1

Appendix 9.1 Water Quality Index (WQI) of the River Indus and its tributaries

N

Tin PingShan

Lo Wu

Shenzhen

Sheung Shui

River Ganges

Loi Tung

River Indus

River Beas

Deep Bay

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

IN13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

IN23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

IN33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

ManKam To

Ho SheungHeung

Kwu Tung

ShekWu Hui

Fanling

TsungPak Long

Kwan Tei

Lau ShuiHeung

Ping CheMa

Mei Ha

HokTau WaiTong Kung

Leng

Kan Tau Wai

Ta Kwu Ling

Wo Keng Shan

Appendix 9

Deep B

ay Water C

ontrol Zone

A9 -1

Appendix 9.2 Water Quality Index (WQI) of the River Beas and its tributaries

N

Deep Bay

Shenzhen

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

RB23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

RB13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

RB33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Tin PingShan

Lo WuSheung Shui

Loi Tung

ManKam To

Ho SheungHeung

Kwu Tung

ShekWu Hui

Fanling

TsungPak Long

Kwan Tei

Lau ShuiHeung

Ping CheMa

Mei Ha

HokTau WaiTong Kung

Leng

Kan Tau Wai

Ta Kwu Ling

Wo Keng Shan

River Ganges

River Indus

River Beas

Appendix 9

Deep B

ay Water C

ontrol Zone

A9 -2

Appendix 9.3 Water Quality Index (WQI) of the River Ganges and its tributaries

Shenzhen

Deep Bay

N

河R

iver Water Q

uality in Hong K

ong in 2001

GR13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

GR23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

GR33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Tin PingShan

Lo WuSheung Shui

Loi Tung

ManKam To

Ho SheungHeung

Kwu Tung

ShekWu Hui

Fanling

TsungPak Long

Kwan Tei

Lau ShuiHeung

Ping Che MaMei Ha

HokTau WaiTong Kung

Leng

Kan Tau Wai

Ta Kwu Ling

Wo Keng Shan

Excellent

Bad

Fair

Very Bad

Good

River Ganges

River Indus

River Beas

Appendix 9

Deep B

ay Water C

ontrol Zone

A9 -3

Excellent

Bad

Fair

Very Bad

Good

Kam Tin River

Kam TinYuen Long

Yuen Long Creek

Shap PatHeung

Tai KeiLeng

N

Pat Heung

Deep Bay

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

YL13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exExcellent

Bad

Fair

Very Bad

Good

YL43

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

YL23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

KT13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

YL33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exExcellent

Bad

Fair

Very Bad

Good

KT23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Long PingEstate

Ma TinTsuen

Yuen LongKau Hui

Nam Sang Wai

Shui Tau

Ho HokShan Shek Kong

CampNg KaTsuen

Appendix 9

Deep B

ay Water C

ontrol Zone

A9 Appendix 9.4 Water Quality Index (WQI) of Yuen Long Creek and Kam Tin River and their tributaries -4

Excellent

Bad

Fair

Very Bad

Good

N Deep Bay

Fairview ParkNullahTin Shui Wai

Nullah

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

TSR13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

FVR13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

TSR23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

FairviewPark

Nam Sang Wai

Tai Sang Wai

LutChau

Mai Po NatureReserve

Wo Shing Wai

Palm Springs

Royal Palms

Yuen Long

Shek PoTsuen

Hung ShuiKiu

Tan KwaiTsuen

Wo Ping SanTsuen

Yuen Long Creek

Appendix 9

Deep B

ay Water C

ontrol Zone

A9 Appendix 9.5 Water Quality Index (WQI) of Tin Shui Wai Nullah and Fairview Park Nullah and their tributaries -5

Appendix 9.6 Water Quality Index (WQI) of minor streams in the Deep Bay Water Control Zone

Pak NaiStream

Ngau HomSha Stream

SheungPak NaiStream

Ha Pak NaiStream

Deep Bay

河R

iver Water Q

uality in Hong K

ong in 2001

N

Tai ShuiHang

Stream

Tsang KokStream

Excellent

Bad

Fair

Very Bad

Good

DB13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

DB23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

DB83

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Yuen Tau Shan

Castle Peak

Po Lor Shan

Appendix 9

Deep B

ay Water C

ontrol Zone

A9 -6

Excellent

Bad

Fair

Very Bad

Good

Deep Bay

河R

iver Water Q

uality in Hong K

ong in 2001

N

Excellent

Bad

Fair

Very Bad

Good

DB53

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

DB33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

DB63

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Yuen Tau Shan

Po Lor Shan

Castle Peak

Pak NaiStream

Ngau HomSha Stream

SheungPak NaiStream

Ha Pak NaiStream

Tai ShuiHang

Stream

Tsang KokStream

Appendix 9

Deep B

ay Water C

ontrol Zone

A9 Appendix 9.7 Water Quality Index (WQI) of minor streams in the Deep Bay Water Control Zone (continued) -7

Excellent

Bad

Fair

Very Bad

Good

Excellent

Bad

Fair

Very Bad

Good

Excellent

Bad

Fair

Very Bad

Good N

San Fat Estate

Lam Tei

Tuen Mun River

Fu Tei

Tuen Mun

Castle Peak Bay

河R

iver Water Q

uality in Hong K

ong in 2001

TN13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TN43

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

TN23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TN53

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

TN33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TN63

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Yau Oi Estate

Chelsea Heights

Tuen MunSan Hui

Siu Hong Court

To Yuen Wai

LingnanUniversity

Ho Tin LRT

Tuen Mun Hospital

A

Appendix 10

North W

estern Water C

ontrol Zone

10 - Appendix 10.1 Water Quality Index (WQI) of Tuen Mun River and its tributaries

1

Appendix 10.2 Water Quality Index (WQI) of Tung Chung River and its tributaries

Tung Chung

Tung Chung Wan

Tung Chung River

N

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

TC13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TC23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TC33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Ngau Au

Nim Yuen ShekLauPo

ShekMunKap

San Tung Chung Hung

Wong Lung Hang

Shek Sze Shan

Shan Ha

Ling Pe

Ma WanChung

A

Appendix 10

North W

estern Water C

ontrol Zone

10 -2

Appendix 11.1 Water Quality Index (WQI) of Pai Min Kok (Anglers’) Stream and its tributaries

N

Anglers’Beach

Pai Min Kok Stream(Anglers’Stream)

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

AN13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

AN23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Tsing Lung Tau

Sea Crest Villa

Pai MinKok

Village

A

Appendix 11

Western B

uffer Water C

ontrol Zone

11 -1

Excellent

Bad

Fair

Very Bad

Good

TW33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

N Sam Dip Tam Stream

Lo Wai

Yi Pei ChunSai Lau Kok Tsuen

Western Monastery

Cheung Pei Shan Road

San Tsuen

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

TW13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

TW23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Shek Wai Kok Estate

A

Appendix 12

Victoria H

arbourW

ater Control Z

one

12 - Appendix 12.1 Water Quality Index (WQI) of Sam Dip Tam Stream and its tributaries

1

Appendix 12.2 Water Quality Index (WQI) of Kau Wa Keng Stream

Kau WaKeng

Mei Foo

Kau Wa Keng Stream

Ha Kwai Chung

Lai King Hill Road

N

河R

iver Water Q

uality in Hong K

ong in 2001

Excellent

Bad

Fair

Very Bad

Good

KW33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

PrincessMargaretHospital

Kau Wa KengSan Tsuen Chung Shan

Terreace

A

Appendix 12

Victoria H

arbourW

ater Control Z

one

12 -2

Appendix 12.3 Water Quality Index (WQI) of Kai Tak Nullah

河R

iver Water Q

uality in Hong K

ong in 2001

N

San Po Kong

KowloonCity

Kowloon Bay

old Kai Tak Airport RunwayExcellent

Bad

Fair

Very Bad

Good

KN13

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

KN43

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

KN23

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

KN33

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

ex

Excellent

Bad

Fair

Very Bad

Good

KN73

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exExcellent

Bad

Fair

Very Bad

Good

KN53

6

9

12

15

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

Year

Wat

er Q

ual

ity

Ind

exWongTaiSin

WangTauHom

Ex-Hong KongInternational Airport

(Kai Tak)

Kai Tak Nullah

Tsz Wan Shan Diamond Hill

Lok Fu

A

Appendix 12

Victoria H

arbourW

ater Control Z

one

12 -3

Appendix 13Appendix 13.1 Summary of water quality monitoring data for Shing Mun River in 2001

Sampling StationParameter Unit Tin Sum Nullah Tai Wai Nullah Kwun Yam Shan Stream Siu Lek Yuen Nullah

TR20B TR19A TR19C TR19 KY1 TR23L TR23ADissolved oxygen mg/L 8.5 8.8 9.0 9.3 8.6 9.9 6.5

(7.6 - 10.0) (7.7 - 10.4) (8.0 - 10.4) (8.2 - 11.3) (5.1 - 10.5) (7.3 - 11.3) (3.2 - 9.1)pH 7.8 7.7 7.4 7.6 7.9 8.9 7.8

(7.2 - 8.0) (7.1 - 8.9) (7.1 - 7.6) (7.1 - 7.8) (7.2 - 8.8) (8.0 - 9.6) (7.3 - 8.1)Suspended solids mg/L 2 4 3 5 2 3 5

(1 - 13) (2 - 15) (2 - 17) (2 - 35) (1 - 7) (1 - 19) (3 - 13)5-day Biochemical Oxygen Demand mg/L 1 1 2 4 1 1 5

(1 - 4) (1 - 12) (1 - 14) (1 - 21) (1 - 3) (1 - 7) (3 - 7)Chemical Oxygen Demand mg/L 8 7 8 11 4 8 14

(3 - 17) (3 - 29) (2 - 15) (4 - 24) (2 - 8) (3 - 18) (9 - 19)Oil & grease mg/L 0.5 0.5 0.5 0.5 0.5 0.5 0.5

(0.5 - 0.5) (0.5 - 1.4) (0.5 - 0.7) (0.5 - 8.4) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5)Faecal coliforms cfu/100mL 1 1,200 38,000 79,000 1,700 51,000 240,000

(1 - 6) (1 - 840,000) (1,900 - 1,100,000) (20,000 - 910,000) (120 - 14,000) (14,000 - 370,000) (80,000 - 510,000)E. coli cfu/100mL 1 480 6,300 12,000 730 2,200 23,000

(1 - 1) (1 - 440,000) (680 - 770,000) (1,100 - 470,000) (70 - 11,000) (580 - 15,000) (3,000 - 100,000)Ammonia-nitrogen mg/L 0.06 0.08 0.10 0.19 0.02 0.03 0.50

(0.02 - 0.12) (0.02 - 2.30) (0.03 - 1.10) (0.02 - 1.40) (0.01 - 0.03) (0.01 - 0.11) (0.08 - 1.00)Nitrate-nitrogen mg/L 2.65 1.85 1.30 1.50 0.40 0.14 0.33

(0.43 - 4.20) (0.45 - 3.50) (0.96 - 2.00) (0.95 - 2.10) (0.21 - 0.65) (0.06 - 0.42) (0.05 - 0.89)Total Kjeldahl nitrogen, SP mg/L 0.42 0.19 0.27 0.49 0.11 0.19 0.97

(0.05 - 0.64) (0.06 - 4.00) (0.05 - 1.90) (0.09 - 2.40) (0.05 - 0.18) (0.08 - 0.71) (0.49 - 1.80)Ortho-phosphate mg/L 0.02 0.02 0.06 0.08 0.07 0.03 0.04

(0.01 - 0.09) (0.01 - 0.44) (0.01 - 0.17) (0.01 - 0.29) (0.02 - 0.12) (0.01 - 0.04) (0.01 - 0.11)Total phosphorus, SP mg/L 0.07 0.07 0.11 0.16 0.12 0.05 0.15

(0.02- 0.30) (0.02 - 0.64) (0.05 - 0.33) (0.07 - 0.50) (0.07 - 0.18) (0.02 - 0.10) (0.06 - 0.25)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02 0.02 0.02

(0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02)Aluminium µg/L 250 125 120 145 70 95 90

(70 - 1,600) (60 - 210) (60 - 210) (80 - 390) (50 - 100) (50 - 140) (50 - 160)Cadmium µg/L 0.10 0.20 0.20 0.20 0.10 0.10 0.10

(0.10 - 0.10) (0.10 - 4.30) (0.10 - 0.70) (0.10 - 0.60) (0.10 - 0.10) (0.10 - 0.30) (0.10 - 0.20)Chromium µg/L 1.0 1.0 1.0 1.0 1.0 1.0 3.0

(1.0 - 4.0) (1.0 - 4.0) (1.0 - 2.0) (1.0 - 4.0) (1.0 - 3.0) (1.0 - 3.0) (1.0 - 6.0)Copper µg/L 3.0 2.5 20.0 19.0 1.0 2.0 4.5

(1.0 - 6.0) (1.0 - 6.0) (8.0 - 61.0) (9.0 - 43.0) (1.0 - 2.0) (1.0 - 15.0) (3.0 - 12.0)Lead µg/L 1.0 1.0 2.0 2.0 1.0 1.0 1.0

(1.0 - 2.0) (1.0 - 2.0) (1.0 - 3.0) (1.0 - 4.0) (1.0 - 1.0) (1.0 - 3.0) (1.0 - 7.0)Zinc µg/L 20 20 40 40 10 20 20

(10 - 60) (20 - 230) (20 - 120) (20 - 100) (10 - 60) (10 - 150) (10 - 90)Flow L/s 73 31 75 72 3 15 NM

(27 - 132) (17 - 281) (30 - 402) (41 - 360) (1 - 55) (5 - 61)

Notes: 1. Data presented are in annual medians of monthly samples; except those for faecal coliforms and E. coli which are in annual geometric means. 2. Figures in brackets are annual ranges. 3. NM indicates no measurement taken. 4. cfu - colony forming unit. 5. SP - soluble and particulate fractions i.e. total value. 6. Values at or below laboratory reporting limits are presented as laboratory reporting limits (see Appendix 2). 7. Equal values for annual medians (or geometric means) and ranges indicate that all data are the same as or below laboratory reporting limits.


Water quality results for the Tolo Harbour and Channel WCZ

Appendix 13Appendix 13.2 Summary of water quality monitoring data for Shing Mun River, Tai Po River and minor streams in the Tolo Harbour & Channel Water Control Zone in 2001

Sampling StationParameter Unit Fo Tan Nullah Shing Mun Main Channel Tai Po River Tai Po Kau Stream Shan Liu Stream Tung Tze Stream

TR17 TR17L TR19I TR13 TR14 TR4 TR6Dissolved oxygen mg/L 8.4 6.8 7.3 8.1 8.6 8.0 6.4

(6.6 - 10.0) (4.6 - 9.5) (3.4 - 11.9) (7.4 - 9.6) (7.2 - 10.7) (6.8 - 10.5) (5.0 - 10.2)pH 7.8 7.6 7.9 7.1 7.3 7.5 7.5




(3 - 56) (10 - 23) (9 - 22) (2 - 13) (2 - 13) (2 - 8) (6 - 22)Oil & grease mg/L 0.8 0.5 0.5 0.5 0.5 0.5 0.5

(0.5 - 8.8) (0.5 - 0.6) (0.5 - 0.5) (0.5 - 0.6) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5)Faecal coliforms cfu/100mL 280,000 39,000 17,000 110,000 7,100 11,000 5,300

(38,000 - 950,000) (810 - 160,000) (380 - 280,000) (32,000 - 750,000) (540 - 53,000) (2,300 - 48,000) (56 - 130,000)E. coli cfu/100mL 48,000 6,800 4,200 67,000 860 1,400 1,700

(5,600 - 470,000) (200 - 49,000) (110 - 140,000) (14,000 - 720,000) (72 - 26,000) (350 - 5,900) (44 - 80,000)Ammonia-nitrogen mg/L 0.13 0.30 0.21 0.28 0.03 0.09 0.24





(0.02 - 0.55) (0.03 - 0.13) (0.03 - 0.27) (0.03 - 0.45) (0.03 - 0.07) (0.04 - 0.17) (0.03 - 0.22)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02 0.02 0.02

(0.02 - 0.08) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02)Aluminium µg/L 180 90 100 70 75 70 85

(70 - 490) (50 - 150) (50 - 140) (50 - 90) (50 - 110) (50 - 100) (50 - 240)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.30) (0.10 - 0.20) (0.10 - 0.20) (0.10 - 0.20) (0.10 - 0.20) (0.10 - 0.30) (0.10 - 0.20)Chromium µg/L 1.0 4.0 3.5 1.0 1.0 1.0 3.5

(1.0 - 1.0) (1.0 - 7.0) (1.0 - 7.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 6.0)Copper µg/L 4.0 6.0 6.5 2.0 1.0 1.5 5.0

(1.0 - 11.0) (4.0 - 9.0) (5.0 - 11.0) (1.0 - 2.0) (1.0 - 2.0) (1.0 - 13.0) (1.0 - 11.0)Lead µg/L 3.0 1.0 1.0 1.0 1.5 1.0 1.5

(2.0 - 9.0) (1.0 - 2.0) (1.0 - 2.0) (1.0 - 2.0) (1.0 - 3.0) (1.0 - 7.0) (1.0 - 6.0)Zinc µg/L 45 25 20 20 15 10 20

(10 - 90) (10 - 40) (10 - 50) (10 - 50) (10 - 20) (10 - 50) (10 - 70)Flow L/s 32 NM NM 179 51 71 NM

(10 - 214) (103 - 945) (5 - 442) (22 - 284)




Appendix 13Appendix 13.3 Summary of water quality monitoring data for Lam Tsuen River in 2001

Sampling StationParameter Unit Lam Tsuen River

TR12H TR12D TR12G TR12F TR12C TR12B TR12E TR12 TR12IDissolved oxygen mg/L 8.9 8.7 8.2 8.4 8.6 8.8 8.5 8.8 5.8

(7.4 - 10.1) (7.6 - 10.5) (7.4 - 9.4) (8.0 - 10.2) (6.5 - 9.9) (7.7 - 10.2) (8.0 - 9.5) (7.8 - 11.8) (3.9 - 7.9)pH 7.3 7.3 7.1 7.3 7.2 7.2 7.7 7.3 7.2

(6.7 - 7.6) (6.8 - 7.6) (6.6 - 7.3) (6.7 - 7.6) (6.6 - 7.8) (6.7 - 7.8) (7.4 - 8.0) (6.8 - 8.8) (6.7 - 7.6)Suspended solids mg/L 1 1 1 2 4 2 13 10 6

(1 - 5) (1 - 740) (1 - 5) (1 - 6) (2 - 49) (1 - 7) (1 - 52) (2 - 380) (4 - 10)5-day Biochemical Oxygen Demand mg/L 1 1 1 1 2 1 1 2 6

(1 - 2) (1 - 3) (1 - 2) (1 - 1) (1 - 5) (1 - 2) (1 - 2) (1 - 13) (1 - 9)Chemical Oxygen Demand mg/L 4 3 4 5 9 6 5 15 19

(2 - 9) (2 - 23) (2 - 9) (3 - 9) (4 - 15) (2 - 11) (2 - 10) (5 - 37) (5 - 26)Oil & grease mg/L 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5

(0.5 - 0.5) (0.5 - 1.0) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.7) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.9) (0.5 - 0.6)Faecal coliforms cfu/100mL 2,500 1,900 1,200 8,200 45,000 15,000 11,000 8,600 270,000

(96 - 19,000) (400 - 15,000) (69 - 4,000) (1,100 - 52,000) (13,000 - 130,000) (4,800 - 91,000) (2,400 - 120,000) (2,400 - 50,000) (19,000 - 5,100,000)E. coli cfu/100mL 630 220 96 1,700 11,000 7,000 4,500 1,300 78,000

(93 - 8,000) (26 - 5,100) (19 - 230) (490 - 26,000) (600 - 28,000) (1,800 - 39,000) (560 - 80,000) (250 - 5,000) (5,300 - 1,300,000)Ammonia-nitrogen mg/L 0.02 0.02 0.02 0.06 0.40 0.12 0.05 0.29 0.62

(0.01 - 0.04) (0.01 - 0.05) (0.01 - 0.05) (0.02 - 0.13) (0.11 - 0.91) (0.03 - 0.49) (0.01 - 0.25) (0.03 - 1.40) (0.05 - 1.20)Nitrate-nitrogen mg/L 0.85 0.23 0.03 0.38 1.10 0.90 0.30 2.80 0.98

(0.65 - 1.30) (0.09 - 0.37) (0.01 - 0.09) (0.16 - 0.53) (0.50 - 2.00) (0.44 - 1.30) (0.20 - 0.59) (0.94 - 15.00) (0.23 - 2.10)Total Kjeldahl nitrogen, SP mg/L 0.06 0.05 0.09 0.18 0.63 0.31 0.16 1.19 1.10

(0.05 - 0.10) (0.05 - 0.22) (0.05 - 0.19) (0.07 - 0.38) (0.31 - 1.20) (0.07 - 0.68) (0.05 - 0.30) (0.13 - 4.10) (0.16 - 2.40)Ortho-phosphate mg/L 0.02 0.01 0.01 0.04 0.11 0.09 0.02 0.22 0.12

(0.01 - 0.05) (0.01 - 0.02) (0.01 - 0.03) (0.01 - 0.07) (0.02 - 0.36) (0.01 - 0.16) (0.01 - 0.04) (0.04 - 2.40) (0.05 - 0.22)Total phosphorus, SP mg/L 0.04 0.02 0.06 0.08 0.21 0.16 0.05 0.72 0.24

(0.02 - 0.05) (0.02 - 0.06) (0.02 - 0.15) (0.05 - 0.13) (0.13 - 0.58) (0.04 - 0.24) (0.02 - 0.08) (0.10 - 2.60) (0.08 - 0.44)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02

(0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.04)Aluminium µg/L 50 50 50 50 95 50 175 145 90

(50 - 60) (50 - 1,800) (50 - 110) (50 - 50) (60 - 3,200) (50 - 90) (90 - 560) (60 - 3,300) (50 - 270)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.40) (0.10 - 2.70) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.40) (0.10 - 0.40) (0.10 - 0.20)Chromium µg/L 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 2.0

(1.0 - 1.0) (1.0 - 3.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 2.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 3.0) (1.0 - 9.0)Copper µg/L 1.0 1.0 1.0 1.0 1.0 2.0 1.0 4.5 4.0

(1.0 - 2.0) (1.0 - 27.0) (1.0 - 4.0) (1.0 - 1.0) (1.0 - 6.0) (1.0 - 3.0) (1.0 - 2.0) (1.0 - 15.0) (2.0 - 8.0)Lead µg/L 1.0 1.0 1.0 1.0 1.0 1.0 1.5 1.5 1.0

(1.0 - 3.0) (1.0 - 240.0) (1.0 - 2.0) (1.0 - 1.0) (1.0 - 6.0) (1.0 - 2.0) (1.0 - 5.0) (1.0 - 90.0) (1.0 - 3.0)Zinc µg/L 15 10 10 10 10 20 20 25 25

(10 - 40) (10 - 210) (10 - 40) (10 - 30) (10 - 40) (10 - 30) (10 - 30) (10 - 90) (10 - 120)Flow L/s 72 51 27 44 53 341 56 131 NM

(11 - 1,920) (12 - 294) (5 - 223) (8 - 308) (11 - 288) (111 - 5,760) (17 - 203) (14 - 1,265)




Appendix 13Appendix 13.4 Summary of water quality monitoring data for Mui Wo River in 2001

Sampling StationParameter Unit Mui Wo River

MW1 MW2 MW3 MW4 MW5Dissolved oxygen mg/L 8.4 8.5 8.8 8.0 8.0

(6.8 - 10.8) (7.4 - 11.2) (7.4 - 11.2) (6.6 - 10.2) (6.0 - 12.4)pH 7.1 7.5 7.2 7.3 7.3

(6.5 - 8.1) (6.7 - 8.1) (6.5 - 7.9) (6.5 - 8.1) (6.5 - 8.1)Suspended solids mg/L 2 4 2 8 5

(1 - 11) (1 - 14) (1 - 33) (4 - 37) (2 - 16)5-day Biochemical Oxygen Demand mg/L 1 1 1 1 1

(1 - 3) (1 - 4) (1 - 3) (1 - 4) (1 - 2)Chemical Oxygen Demand mg/L 6 8 4 10 10

(3 - 12) (3 - 17) (2 - 7) (5 - 15) (5 - 16)Oil & grease mg/L 0.5 0.5 0.5 0.5 0.5

(0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5)Faecal coliforms cfu/100mL 10,000 18,000 2,100 5,300 16,000

(2,200 - 82,000) (5,200 - 58,000) (250 - 6,400) (260 - 190,000) (1,300 - 120,000)E. coli cfu/100mL 3,700 2,700 140 1,100 2,800

(510 - 65,000) (400 - 11,000) (7 - 1,200) (80 - 120,000) (420 - 36,000)Ammonia-nitrogen mg/L 0.04 0.31 0.02 0.16 0.46

(0.02 - 0.22) (0.05 - 0.88) (0.01 - 0.06) (0.06 - 0.20) (0.11 - 1.10)Nitrate-nitrogen mg/L 0.23 0.13 0.21 0.18 0.11

(0.11 - 0.60) (0.09 - 0.26) (0.10 - 0.65) (0.08 - 0.33) (0.06 - 0.15)Total Kjeldahl nitrogen, SP mg/L 0.15 0.52 0.10 0.35 0.74

(0.05 - 0.40) (0.11 - 1.20) (0.05 - 0.16) (0.18 - 0.48) (0.22 - 1.40)Ortho-phosphate mg/L 0.11 0.07 0.05 0.05 0.05

(0.03 - 0.24) (0.01 - 0.18) (0.02 - 0.10) (0.01 - 0.12) (0.02 - 0.08)Total phosphorus, SP mg/L 0.15 0.14 0.07 0.12 0.14

(0.06 - 0.27) (0.05 - 0.28) (0.04 - 0.20) (0.05 - 0.15) (0.06 - 0.25)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02

(0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02)Aluminium µg/L 100 90 75 110 80

(60 - 160) (50 - 170) (50 - 160) (70 - 220) (50 - 160)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.30)Chromium µg/L 1.0 1.5 1.0 2.5 1.0

(1.0 - 8.0) (1.0 - 5.0) (1.0 - 2.0) (1.0 - 6.0) (1.0 - 4.0)Copper µg/L 1.0 2.5 1.0 4.5 2.0

(1.0 - 8.0) (1.0 - 8.0) (1.0 - 2.0) (1.0 - 9.0) (1.0 - 3.0)Lead µg/L 1.0 1.0 1.0 1.5 1.0

(1.0 - 3.0) (1.0 - 3.0) (1.0 - 2.0) (1.0 - 4.0) (1.0 - 4.0)Zinc µg/L 30 20 40 20 20

(10 - 60) (10 - 30) (20 - 150) (10 - 60) (10 - 90)Flow L/s 60 NM 18 308 30

(5 - 150) (1 - 115) (108 - 743) (4 - 420)



Water quality results for the Southern WCZ

Appendix 13Appendix 13.5 Summary of water quality monitoring data for rivers in the Port Shelter and Junk Bay Water Control Zones in 2001

Sampling StationParameter Unit Ho Chung River Sha Kok Mei Stream Tai Chung Hau Stream Tseng Lan Shue Stream

PR1 PR2 PR5 PR6 PR7 PR8 JR3 JR6 JR11Dissolved oxygen mg/L 8.1 8.6 8.6 8.9 8.8 8.7 5.9 6.8 8.5

(5.3 - 8.9) (7.7 - 9.7) (6.5 - 9.5) (7.4 - 10.3) (8.0 - 10.2) (7.1 - 10.0) (3.9 - 7.5) (4.8 - 7.8) (8.0 - 10.6)pH 7.1 7.4 7.3 7.5 7.5 7.3 7.1 7.6 7.4


(2 - 11) (1 - 2) (2 - 5) (1 - 13) (1 - 1,600) (1 - 9) (2 - 46) (4 - 34) (2 - 7)5-day Biochemical Oxygen Demand mg/L 1 1 1 4 1 1 12 13 2


(5 - 14) (2 - 7) (3 - 12) (3 - 19) (2 - 21) (3 - 10) (10 - 70) (12 - 51) (3 - 16)Oil & grease mg/L 0.5 0.5 0.5 0.5 0.5 0.5 1.1 1.5 0.5


(3,900 - 280,000) (510 - 8,200) (5,500 - 67,000) (49,000 - 360,000) (12,000 - 80,000) (10,000 - 250,000) (21,000 - 1,200,000) (370,000-1,100,000) (1,200 - 84,000)E. coli cfu/100mL 9,100 420 6,400 20,000 8,400 9,800 75,000 320,000 2,300

(1,200 - 110,000) (100 - 2,900) (950 - 47,000) (6,700 - 66,000) (3,700 - 29,000) (6,100 - 18,000) (14,000 - 560,000) (100,000-870,000) (320 - 54,000)Ammonia-nitrogen mg/L 0.46 0.03 0.13 0.67 0.07 0.07 5.60 4.50 0.06


(0.12 - 0.40) (0.10 - 0.49) (0.48 - 1.40) (1.20 - 2.80) (0.42 - 1.60) (0.66 - 2.40) (0.42 - 1.60) (1.10 - 3.40) (1.30 - 6.90).Total Kjeldahl nitrogen, SP mg/L 0.68 0.13 0.29 1.01 0.21 0.28 7.90 5.95 0.33



(0.03 - 0.36) (0.02 - 0.05) (0.06 - 0.21) (0.09 - 0.56) (0.04 - 0.21) (0.04 - 0.18) (0.30 - 1.80) (0.53 - 2.20) (0.17 - 1.60)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.02

(0.02 - 0.24) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.05) (0.02 - 0.07) (0.02 - 0.02)Aluminium µg/L 95 70 80 85 95 65 120 145 80

(50 - 170) (50 - 110) (50 - 140) (60 - 330) (50 - 5,500) (50 - 120) (100 - 1,300) (80 - 320) (50 - 150)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.20) (0.10 - 0.30) (0.10 - 0.10) (0.10 - 0.30) (0.10 - 0.30) (0.10 - 0.10)Chromium µg/L 2.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0

(1.0 - 7.0) (1.0 - 4.0) (1.0 - 4.0) (1.0 - 2.0) (1.0 - 2.0) (1.0 - 1.0) (1.0 - 5.0) (1.0 - 4.0) (1.0 - 2.0)Copper µg/L 4.0 1.0 2.0 2.0 2.0 1.5 4.5 8.5 3.0

(2.0 - 6.0) (1.0 - 2.0) (1.0 - 6.0) (1.0 - 3.0) (1.0 - 53.0) (1.0 - 7.0) (2.0 - 18.0) (4.0 - 17.0) (2.0 - 4.0)Lead µg/L 1.0 1.0 1.0 1.0 1.0 1.0 2.0 2.5 1.0

(1.0 - 4.0) (1.0 - 2.0) (1.0 - 1.0) (1.0 - 3.0) (1.0 - 140.0) (1.0 - 2.0) (1.0 - 11.0) (1.0 - 4.0) (1.0 - 4.0)Zinc µg/L 25 10 10 30 15 15 40 60 20

(10 - 190) (10 - 60) (10 - 60) (20 - 50) (10 - 230) (10 - 40) (20 - 120) (40 - 200) (10 - 50)Flow L/s NM 105 90 NM 105 NM NM NM 80

(28 - 720) (36 - 415) (11 - 1,140) (14 - 304)



Water quality results for the Port Shelter and Junk Bay WCZs

Appendix 13Appendix 13.6 Summary of water quality monitoring data for the River Indus, the River Beas and the River Ganges in 2001

Sampling StationParameter Unit River Indus River Beas River Ganges

IN1 IN2 IN3 RB1 RB2 RB3 GR1 GR2 GR3Dissolved oxygen mg/L 4.8 5.6 7.8 7.6 8.8 6.9 5.6 6.6 7.8

(1.8 - 7.3) (2.4 - 7.6) (5.2 - 9.4) (5.3 - 8.9) (7.1 - 10.3) (3.8 - 8.9) (2.7 - 8.9) (3.1 - 8.4) (5.9 - 9.0)pH 7.0 6.8 6.9 7.2 7.4 6.9 7.1 6.9 6.9


(21 - 90) (9 - 72) (2 - 23) (12 - 160) (13 - 1,100) (11 - 1,200) (17 - 190) (5 - 73) (2 - 54)5-day Biochemical Oxygen Demand mg/L 9 6 4 7 6 8 19 9 1


(12 - 49) (8 - 35) (8 - 21) (10 - 33) (8 - 63) (12 - 120) (13 - 170) (20 - 91) (4 - 11)Oil & grease mg/L 0.5 0.5 0.5 0.5 0.5 0.5 0.7 1.0 0.5


(180,000 - 6,600,000) (5,800-38,000,000) (3,600 - 390,000) (27,000 - 220,000) (13,000 - 520,000) (51,000 - 1,100,000) (230,000 - 1,200,000) (130,000 - 2,500,000) (3,100 - 780,000)E. coli cfu/100mL 150,000 44,000 4,700 17,000 18,000 42,000 120,000 95,000 6,000

(20,000 - 3,800,000) (230-350,000) (580 - 72,000) (5,000 - 52,000) (6,300 - 100,000) (12,000 - 240,000) (20,000 - 530,000) (31,000 - 220,000) (70 - 410,000)Ammonia-nitrogen mg/L 2.70 1.95 0.57 3.10 3.80 3.20 20.00 4.40 0.11





(0.50 - 2.10) (0.16 - 0.43) (0.32 - 1.90) (0.33 - 1.40) (0.42 - 1.60) (0.41 - 3.20) (1.20 - 21.00) (1.60 - 4.60) (0.02 - 0.07)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02 0.02 0.04 0.03 0.02

(0.02 - 0.44) (0.02 - 0.03) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.09) (0.02 - 0.26) (0.02 - 0.12) (0.02 - 0.02)Aluminium µg/L 260 150 65 285 365 220 235 150 50

(180 - 610) (50 - 260) (50 - 130) (140 - 430) (170 - 1,300) (140 - 2,600) (160 - 660) (100 - 320) (50 - 240)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.70) (0.10 - 0.20) (0.10 - 0.20) (0.10 - 0.10) (0.10 - 0.40) (0.10 - 0.80) (0.10 - 0.40) (0.10 - 1.80) (0.10 - 0.10)Chromium µg/L 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0

(1.0 - 7.0) (1.0 - 3.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 5.0) (1.0 - 3.0) (1.0 - 2.0) (1.0 - 1.0)Copper µg/L 6.0 4.5 7.5 5.5 8.0 5.0 19.0 7.0 1.0

(4.0 - 14.0) (2.0 - 8.0) (5.0 - 31.0) (2.0 - 8.0) (3.0 - 22.0) (3.0 - 78.0) (7.0 - 110.0) (4.0 - 39.0) (1.0 - 3.0)Lead µg/L 4.0 4.0 1.0 5.0 7.0 4.0 3.0 2.0 1.0

(2.0 - 9.0) (1.0 - 9.0) (1.0 - 2.0) (1.0 - 13.0) (2.0 - 45.0) (1.0 - 99.0) (1.0 - 5.0) (1.0 - 4.0) (1.0 - 5.0)Zinc µg/L 105 450 35 30 40 75 70 55 20

(30 - 240) (90 - 24,000) (20 - 60) (20 - 50) (20 - 170) (20 - 1,300) (30 - 200) (30 - 140) (10 - 70)Flow L/s NM NM 35 200 870 624 83 49 23

(19 - 484) (114 - 1,224) (204 - 12,116) (300 - 5,680) (15 - 1,734) (8 - 712) (12 - 228)



Water quality results for the Deep Bay WCZ

Appendix 13Appendix 13.7 Summary of water quality monitoring data for Yuen Long Creek, Kam Tin River and Tin Shui Wai Nullah in 2001

Parameter Unit Yuen Long Creek Tin Shui Wai Nullah YL1 YL2 YL3 YL4 KT1 KT2 TSR1 TSR2

Dissolved oxygen mg/L 4.2 7.8 5.1 5.6 5.9 6.3 5.7 9.2(1.9 - 8.1) (6.1 - 10.0) (1.6 - 7.6) (1.4 - 7.6) (1.9 - 7.3) (3.2 - 11.7) (2.9 - 10.9) (7.7 - 13.0)

pH 7.2 7.4 7.3 7.7 7.2 7.3 7.4 7.8(6.4 - 7.9) (6.9 - 8.2) (7.1 - 8.0) (7.1 - 9.4) (6.9 - 7.6) (6.6 - 8.2) (7.0 - 8.2) (7.2 - 9.3)

Suspended solids mg/L 28 14 87 150 60 76 41 19(13 - 140) (10 - 45) (15 - 270) (22 - 1,300) (37 - 530) (41 - 130) (10 - 590) (6 - 250)

5-day Biochemical Oxygen Demand mg/L 20 7 71 69 17 15 14 1(1 - 180) (1 - 11) (3 - 130) (8 - 170) (1 - 42) (1 - 30) (5 - 220) (1 - 15)

Chemical Oxygen Demand mg/L 48 24 69 72 43 44 24 7(9 - 250) (6 - 38) (10 - 170) (20 - 170) (14 - 150) (17 - 120) (8 - 54) (3 - 18)

Oil & grease mg/L 1.5 0.6 3.5 7.1 1.0 0.6 0.6 0.5(0.5 - 37.0) (0.5 - 1.1) (0.5 - 23.0) (0.5 - 19.0) (0.5 - 4.9) (0.5 - 1.2) (0.5 - 9.1) (0.5 - 0.5)

Faecal coliforms cfu/100mL 460,000 200,000 2,700,000 2,400,000 500,000 57,000 1,500,000 44,000(61,000 - 2,100,000) (87,000 - 640,000) (460,000 - 9,600,000) (580,000 - 7,100,000) (98,000 - 2,500,000) (2,000 - 190,000) (280,000 - 23,000,000) (7,500 - 210,000)

E. coli cfu/100mL 320,000 61,000 1,300,000 860,000 250,000 6,500 880,000 16,000(25,000 - 1,800,000) (23,000 - 170,000) (310,000 - 5,100,000) (270,000 - 2,100,000) (51,000 - 1,900,000) (1,300 - 29,000) (120,000 - 18,000,000) (2,000 - 200,000)

Ammonia-nitrogen mg/L 5.85 6.70 15.50 7.40 15.00 4.85 3.75 0.24(0.02 - 90.00) (0.72 - 24.00) (1.30 - 39.00) (1.10 - 14.00) (1.30 - 30.00) (0.38 - 16.00) (1.00 - 8.80) (0.03 - 0.48)

Nitrate-nitrogen mg/L 0.40 1.25 0.75 0.01 0.65 0.39 0.84 0.94(0.01 - 1.50) (0.61 - 2.50) (0.01 - 1.30) (0.01 - 1.40) (0.01 - 1.30) (0.03 - 2.30) (0.39 - 1.50) (0.49 - 1.60)

Total Kjeldahl nitrogen, SP mg/L 6.80 7.65 20.50 12.00 19.00 9.00 5.40 0.62(0.86 - 99.00) (1.10 - 26.00) (1.80 - 46.00) (2.30 - 19.00) (2.20 - 42.00) (1.30 - 20.00) (1.40 - 17.00) (0.05 - 1.70)

Ortho-phosphate mg/L 1.30 1.45 2.25 0.63 3.05 0.42 0.48 0.05(0.24 - 9.20) (0.20 - 3.70) (0.41 - 6.40) (0.01 - 1.60) (0.57 - 4.50) (0.09 - 1.80) (0.11 - 1.10) (0.01 - 0.10)

Total phosphorus, SP mg/L 1.65 1.80 3.90 1.75 4.50 1.45 0.90 0.11(0.36 - 10.00) (0.38 - 4.10) (0.67 - 8.50) (0.75 - 2.40) (0.99 - 9.30) (0.73 - 2.80) (0.28 - 4.70) (0.04 - 0.24)

Sulphide, SP mg/L 0.04 0.02 0.05 0.02 0.02 0.02 0.02 0.02(0.02 - 0.29) (0.02 - 0.02) (0.02 - 0.26) (0.02 - 0.09) (0.02 - 0.06) (0.02 - 0.03) (0.02 - 0.21) (0.02 - 0.02)

Aluminium µg/L 230 240 295 555 450 350 335 270(150 - 410) (140 - 460) (120 - 1,300) (230 - 6,300) (260 - 1,700) (150 - 720) (190 - 1,200) (110 - 1,300)

Cadmium µg/L 0.15 0.10 0.30 0.20 0.20 0.10 0.10 0.10(0.10 - 1.70) (0.10 - 0.30) (0.10 - 1.30) (0.10 - 1.10) (0.10 - 0.60) (0.10 - 0.20) (0.10 - 0.70) (0.10 - 0.10)

Chromium µg/L 1.0 1.0 2.0 2.0 1.0 1.0 1.0 1.0(1.0 - 4.0) (1.0 - 1.0) (1.0 - 12.0) (1.0 - 10.0) (1.0 - 4.0) (1.0 - 1.0) (1.0 - 11.0) (1.0 - 1.0)

Copper µg/L 10.5 5.0 38.0 10.5 15.0 9.5 10.0 2.0(4.0 - 69.0) (3.0 - 10.0) (3.0 - 110.0) (4.0 - 26.0) (8.0 - 58.0) (6.0 - 15.0) (3.0 - 29.0) (1.0 - 5.0)

Lead µg/L 4.0 3.5 6.0 13.0 11.5 7.5 6.5 5.0(2.0 - 9.0) (2.0 - 10.0) (1.0 - 21.0) (4.0 - 100.0) (4.0 - 38.0) (4.0 - 18.0) (2.0 - 30.0) (2.0 - 40.0)

Zinc µg/L 65 30 195 75 70 40 115 25(30 - 750) (20 - 40) (20 - 420) (30 - 200) (30 - 260) (20 - 80) (30 - 1,900) (10 - 70)

Flow L/s 144 252 800 293 594 102 NM 46(43 - 6,960) (153 - 2,864) (138 - 8,400) (84 - 1,170) (60 - 6,860) (27 - 704) (3 - 972)



Kam Tin RiverSampling Station


Appendix 13Appendix 13.8 Summary of water quality monitoring data for Fairview Park Nullah and minor streams in the Deep Bay Water Control Zone in 2001

Sampling StationParameter Unit Fairview Park Nullah Ha Pak Nai Stream Tai Shui Hang Stream Pak Nai Stream Sheung Pak Nai Stream Ngau Hom Sha Stream Tsang Kok Stream

FVR1 DB1 DB2 DB3 DB5 DB6 DB8Dissolved oxygen mg/L 5.5 8.4 8.0 8.0 8.1 7.7 8.9

(4.0 - 6.5) (7.9 - 10.9) (7.4 - 10.6) (7.4 - 10.7) (7.2 - 10.4) (3.1 - 10.3) (8.0 - 10.8)pH 7.1 7.1 7.2 6.7 7.0 7.0 7.6




(14 - 47) (2 - 8) (2 - 5) (2 - 7) (2 - 10) (3 - 36) (2 - 8)Oil & grease mg/L 0.5 0.5 0.5 0.5 0.5 0.5 0.5

(0.5 - 0.7) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5)Faecal coliforms cfu/100mL 460,000 250 350 2,100 820 11,000 700

(72,000 - 1,800,000) (29 - 910) (17 - 11,000) (410 - 63,000) (95 - 13,000) (2,300 - 250,000) (41 - 3,500)E. coli cfu/100mL 48,000 33 54 910 160 4,900 40

(8,000 - 580,000) (4 - 130) (10 - 800) (140 - 57,000) (32 - 5,900) (660 - 190,000) (9 - 140)Ammonia-nitrogen mg/L 5.80 0.02 0.03 0.04 0.03 4.05 0.03





(0.56 - 2.00) (0.02 - 0.04) (0.02 - 0.03) (0.02 - 0.14) (0.02 - 0.04) (0.27 - 2.50) (0.02 - 0.02)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02 0.02 0.02

(0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.03) (0.02 - 0.02)Aluminium µg/L 210 85 75 60 60 100 85

(170 - 450) (50 - 220) (50 - 190) (50 - 170) (50 - 390) (50 - 240) (50 - 240)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.20) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.60) (0.10 - 0.10)Chromium µg/L 1.0 1.0 1.0 1.0 1.0 1.0 1.0

(1.0 - 6.0) (1.0 - 1.0) (1.0 - 2.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 12.0) (1.0 - 1.0)Copper µg/L 5.0 1.0 1.0 1.0 1.0 2.0 1.0

(4.0 - 9.0) (1.0 - 2.0) (1.0 - 2.0) (1.0 - 3.0) (1.0 - 12.0) (1.0 - 55.0) (1.0 - 2.0)Lead µg/L 5.0 1.0 1.0 1.5 1.5 2.0 1.0

(2.0 - 20.0) (1.0 - 2.0) (1.0 - 3.0) (1.0 - 4.0) (1.0 - 23.0) (1.0 - 19.0) (1.0 - 2.0)Zinc µg/L 30 10 20 20 10 30 20

(20 - 70) (10 - 40) (10 - 30) (10 - 30) (10 - 40) (10 - 130) (10 - 70)Flow L/s NM 18 28 47 27 16 NM

(3 - 350) (3 - 1,544) (7 - 212) (4 - 207) (1 - 363)




Appendix 13Appendix 13.9 Summary of water quality monitoring data for Tuen Mun River and Tung Chung River in 2001

Sampling StationParameter Unit Tuen Mun River Tung Chung River

TN1 TN2 TN3 TN4 TN5 TN6 TC1 TC2 TC3Dissolved oxygen mg/L 4.1 8.7 5.6 5.7 5.6 5.8 7.7 7.9 8.3

(2.6 - 8.4) (7.7 - 11.8) (2.7 - 9.3) (2.2 - 9.4) (3.7 - 8.7) (2.8 - 8.9) (5.4 - 8.5) (7.0 - 10.3) (8.0 - 10.9)pH 7.7 7.0 8.1 7.9 8.0 7.4 7.1 7.1 7.5


(10 - 280) (4 - 400) (6 - 540) (3 - 880) (3 - 250) (3 - 20) (1 - 2) (1 - 25) (1 - 28)5-day Biochemical Oxygen Demand mg/L 41 3 7 3 5 3 1 1 1


(23 - 93) (2 - 130) (12 - 42) (7 - 290) (10 - 79) (7 - 18) (3 - 10) (2 - 12) (2 - 8)Oil & grease mg/L 3.8 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5

(1.7 - 14.0) (0.5 - 38.0) (0.5 - 3.8) (0.5 - 1.2) (0.5 - 7.9) (0.5 - 0.6) (0.5 - 0.5) (0.5 - 0.5) (0.5 - 0.5)Faecal coliforms cfu/100mL 1,900,000 17,000 470,000 230,000 340,000 200,000 1,200 3,200 6,300

(550,000 - 9,100,000) (1 - 120,000) (95,000 - 1,300,000) (41,000 - 900,000) (67,000 - 860,000) (18,000 - 2,600,000) (130 - 20,000) (920 - 11,000) (160 - 290,000)E. coli cfu/100mL 410,000 4,200 85,000 44,000 77,000 31,000 79 110 850

(140,000 - 780,000) (1 - 41,000) (10,000 - 260,000) (7,000 - 430,000) (12,000 - 250,000) (800 - 250,000) (18 - 380) (26 - 390) (36 - 160,000)Ammonia-nitrogen mg/L 7.60 0.36 1.00 0.65 0.71 0.55 0.01 0.01 0.07





(1.00 - 2.50) (0.06 - 0.66) (0.12 - 1.40) (0.10 - 61.00) (0.12 - 3.80) (0.10 - 0.28) (0.02 - 0.04) (0.02 - 0.05) (0.02 - 0.25)Sulphide, SP mg/L 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02

(0.02 - 0.11) (0.02 - 0.02) (0.02 - 0.03) (0.02 - 0.08) (0.02 - 0.04) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02)Aluminium µg/L 350 355 890 530 695 200 50 55 50

(230 - 1,000) (90 - 2,400) (120 - 3,100) (80 - 10,000) (80 - 22,000) (60 - 420) (50 - 70) (50 - 70) (50 - 100)Cadmium µg/L 0.10 0.15 0.20 0.10 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.80) (0.10 - 0.60) (0.10 - 0.40) (0.10 - 0.60) (0.10 - 0.70) (0.10 - 0.20) (0.10 - 0.10) (0.10 - 0.30) (0.10 - 0.30)Chromium µg/L 1.0 1.0 5.0 6.0 5.5 4.0 1.0 1.0 1.0

(1.0 - 4.0) (1.0 - 9.0) (1.0 - 11.0) (1.0 - 12.0) (1.0 - 19.0) (2.0 - 8.0) (1.0 - 3.0) (1.0 - 1.0) (1.0 - 1.0)Copper µg/L 7.0 2.5 9.0 6.5 9.0 7.0 1.0 1.0 1.0

(4.0 - 14.0) (1.0 - 19.0) (3.0 - 13.0) (2.0 - 16.0) (2.0 - 26.0) (3.0 - 12.0) (1.0 - 2.0) (1.0 - 3.0) (1.0 - 5.0)Lead µg/L 6.0 9.0 7.0 6.0 7.5 2.0 1.0 1.0 1.0

(2.0 - 35.0) (2.0 - 82.0) (1.0 - 36.0) (1.0 - 67.0) (1.0 - 92.0) (1.0 - 8.0) (1.0 - 2.0) (1.0 - 1.0) (1.0 - 2.0)Zinc µg/L 60 60 40 35 40 20 10 10 20

(30 - 160) (30 - 200) (20 - 80) (10 - 110) (20 - 90) (10 - 40) (10 - 60) (10 - 50) (10 - 130)Flow L/s 87 102 NM NM NM NM 30 41 NM

(52 - 331) (17 - 495) (1 - 204) (2 - 150)



Water quality results for the North Western WCZ

Appendix 13Appendix 13.10 Summary of water quality monitoring data for Pai Min Kok Stream, Sam Dip Tam Stream and Kau Wa Keng Stream in 2001

Sampling StationParameter Unit Pai Min Kok Stream Sam Dip Tam Stream Kau Wa Keng Stream

AN1 AN2 TW1 TW2 TW3 KW3Dissolved oxygen mg/L 7.5 9.0 7.1 8.6 8.6 9.0

(5.9 - 8.1) (8.0 - 11.5) (6.3 - 7.7) (8.1 - 10.2) (8.0 - 10.4) (7.8 - 11.9)pH 7.5 8.0 7.3 7.9 7.3 7.4

(7.0 - 8.3) (7.7 - 8.7) (6.7 - 7.7) (7.3 - 8.1) (6.9 - 8.0) (7.1 - 7.9)Suspended solids mg/L 2 3 2 2 2 3

(1 - 16) (1 - 58) (1 - 11) (1 - 4) (1 - 22) (2 - 84)5-day Biochemical Oxygen Demand mg/L 2 1 2 3 1 3

(1 - 4) (1 - 7) (1 - 28) (1 - 4) (1 - 3) (1 - 23)Chemical Oxygen Demand mg/L 11 7 7 7 6 12

(6 - 23) (5 - 17) (3 - 90) (2 - 12) (4 - 51) (4 - 25)Oil & grease mg/L 0.5 0.5 0.5 0.5 0.5 0.5

(0.5 - 0.5) (0.5 - 1.0) (0.5 - 2.8) (0.5 - 0.6) (0.5 - 0.5) (0.5 - 0.7)Faecal coliforms cfu/100mL 27,000 19,000 220,000 130,000 36,000 120,000

(5,000 - 110,000) (3,000 - 120,000) (45,000 - 780,000) (20,000 - 670,000) (10,000 - 94,000) (44,000 - 830,000)E. coli cfu/100mL 8,700 8,800 19,000 58,000 20,000 58,000

(1,700 - 39,000) (1,100 - 56,000) (3,200 - 150,000) (1,400 - 330,000) (5,300 - 59,000) (22,000 - 190,000)Ammonia-nitrogen mg/L 0.18 0.19 0.09 0.22 0.05 0.82

(0.08 - 1.40) (0.07 - 2.80) (0.02 - 0.63) (0.04 - 1.50) (0.02 - 0.34) (0.12 - 1.70)Nitrate-nitrogen mg/L 2.45 1.50 0.66 1.35 1.85 2.30

(0.90 - 3.70) (0.50 - 4.40) (0.12 - 1.60) (1.00 - 1.80) (1.00 - 2.60) (1.50 - 3.60)Total Kjeldahl nitrogen, SP mg/L 0.41 0.40 0.33 0.42 0.22 1.20

(0.22 - 1.90) (0.20 - 3.20) (0.19 - 0.88) (0.16 - 1.80) (0.05 - 0.89) (0.02 - 4.10)Ortho-phosphate mg/L 0.24 0.17 0.05 0.15 0.12 0.06

(0.07 - 0.63) (0.06 - 1.10) (0.01 - 0.06) (0.07 - 0.20) (0.06 - 0.21) (0.01 - 0.21)Total phosphorus, SP mg/L 0.29 0.21 0.13 0.23 0.18 0.21

(0.10 - 0.75) (0.08 - 1.40) (0.08 - 0.20) (0.11 - 0.29) (0.10 - 0.26) (0.09 - 1.30)Sulphide, SP mg/L 0.02 0.02 0.02 0.02 0.02 0.02

(0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02) (0.02 - 0.02)Aluminium µg/L 135 105 65 55 70 120

(50 - 350) (60 - 1,200) (50 - 160) (50 - 110) (50 - 260) (80 - 600)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10 1.85

(0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.20) (0.70 - 6.10)Chromium µg/L 1.0 1.0 1.0 1.0 1.0 1.0

(1.0 - 4.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 1.0) (1.0 - 3.0)Copper µg/L 5.5 2.0 2.0 2.0 3.0 3.0

(3.0 - 8.0) (2.0 - 4.0) (1.0 - 3.0) (2.0 - 4.0) (2.0 - 6.0) (2.0 - 9.0)Lead µg/L 1.0 1.0 1.0 1.0 1.0 2.0

(1.0 - 7.0) (1.0 - 7.0) (1.0 - 3.0) (1.0 - 5.0) (1.0 - 16.0) (2.0 - 29.0)Zinc µg/L 30 20 20 20 30 160

(20 - 60) (20 - 50) (10 - 40) (10 - 40) (10 - 50) (70 - 390)Flow L/s NM 5 18 34 NM 11

(2 - 27) (3 - 53) (6 - 270) (3 - 78)



Water quality results for the Western Buffer and Victoria Harbour WCZs

Appendix 13Appendix 13.11 Summary of water quality monitoring data for Kai Tak Nullah in 2001

Sampling StationParameter Unit Kai Tak Nullah

KN1 KN2 KN3 KN4 KN5 KN7Dissolved oxygen mg/L 5.9 7.6 8.3 7.6 8.0 7.4

(1.2 - 8.0) (5.4 - 8.4) (6.5 - 8.7) (4.2 - 8.6) (6.6 - 9.1) (6.7 - 8.1)pH 7.3 7.4 7.4 7.1 7.3 7.3

(6.7 - 7.7) (6.9 - 7.9) (6.9 - 7.9) (6.8 - 8.0) (6.8 - 7.9) (6.8 - 7.9)Suspended solids mg/L 6 7 11 22 16 16

(3 - 13) (3 - 10) (5 - 26) (8 - 71) (5 - 73) (6 - 75)5-day Biochemical Oxygen Demand mg/L 10 10 15 17 14 14

(4 - 42) (5 - 17) (8 - 24) (8 - 95) (8 - 28) (8 - 30)Chemical Oxygen Demand mg/L 32 33 30 34 31 32

(22 - 48) (24 - 37) (23 - 37) (21 - 81) (19 - 45) (11 - 42)Oil & grease mg/L 0.5 0.5 0.5 0.6 0.5 0.5

(0.5 - 2.3) (0.5 - 0.7) (0.5 - 0.5) (0.5 - 14.0) (0.5 - 0.8) (0.5 - 2.0)Faecal coliforms cfu/100mL 1,000,000 550,000 420,000 500,000 180,000 130,000

(120,000 - 12,000,000) (130,000 - 1,400,000) (140,000 - 1,500,000) (100,000 - 9,500,000) (60,000 - 1,200,000) (58,000 - 530,000)E. coli cfu/100mL 360,000 120,000 94,000 120,000 60,000 48,000

(84,000 - 4,100,000) (64,000 - 270,000) (58,000 - 140,000) (18,000 - 2,400,000) (17,000 - 350,000) (20,000 - 420,000)Ammonia-nitrogen mg/L 7.25 6.65 6.40 5.15 5.00 5.70

(1.20 - 14.00) (0.80 - 14.00) (0.64 - 14.00) (0.56 - 13.00) (0.62 - 14.00) (0.34 - 14.00)Nitrate-nitrogen mg/L 1.75 2.60 2.90 2.15 2.20 2.45

(0.01 - 4.40) (1.40 - 4.00) (1.60 - 4.40) (0.01 - 4.00) (1.40 - 4.40) (1.40 - 4.40)Total Kjeldahl nitrogen, SP mg/L 8.70 8.00 7.85 7.75 6.80 7.15

(2.00 - 15.00) (1.60 - 15.00) (1.60 - 15.00) (1.70 - 16.00) (1.60 - 16.00) (1.40 - 16.00)Ortho-phosphate mg/L 0.99 1.30 1.30 0.84 0.74 0.78

(0.56 - 2.00) (1.00 - 1.90) (0.61 - 1.80) (0.37 - 1.80) (0.12 - 1.70) (0.06 - 1.90)Total phosphorus, SP mg/L 1.25 1.70 1.55 1.40 1.30 1.35

(0.82 - 2.10) (1.30 - 2.00) (1.10 - 2.10) (0.88 - 2.40) (0.31 - 2.30) (0.22 - 2.90)Sulphide, SP mg/L 0.12 0.05 0.02 0.02 0.02 0.02

(0.02 - 2.00) (0.02 - 0.13) (0.02 - 0.03) (0.02 - 0.09) (0.02 - 0.02) (0.02 - 0.02)Aluminium µg/L 70 60 60 100 80 95

(50 - 170) (50 - 110) (50 - 110) (50 - 200) (50 - 460) (50 - 690)Cadmium µg/L 0.10 0.10 0.10 0.10 0.10 0.10

(0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.10) (0.10 - 0.20) (0.10 - 0.20) (0.10 - 0.30)Chromium µg/L 2.5 2.0 1.5 2.5 2.5 2.5

(1.0 - 7.0) (1.0 - 5.0) (1.0 - 5.0) (1.0 - 7.0) (1.0 - 7.0) (1.0 - 7.0)Copper µg/L 4.5 5.0 6.0 6.0 6.5 6.0

(3.0 - 6.0) (4.0 - 6.0) (5.0 - 6.0) (5.0 - 14.0) (5.0 - 17.0) (5.0 - 18.0)Lead µg/L 1.0 1.0 1.5 1.0 1.5 2.0

(1.0 - 2.0) (1.0 - 2.0) (1.0 - 2.0) (1.0 - 2.0) (1.0 - 4.0) (1.0 - 7.0)Zinc µg/L 30 30 25 30 30 35

(20 - 40) (20 - 30) (20 - 60) (20 - 40) (20 - 50) (20 - 80)Flow L/s NM NM NM NM NM NM



Water quality results for the Victoria Harbour WCZ

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River Water Quality in Hong Kong in 2001 · Appendix 2 Water quality parameters and analytical methods ꩥ River Water Quality in Hong Kong in 2001 A2 - 1 Appendix 2.1 Summary of