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Cambodia water quality standards

 

 

Standard water quality and quantity of disposal substances for the protection of water resources, and public health, and bio-diversity conservation

Table 1: Standard water quality of public waterbody for bio-diversity conservation (Royal Government of the Kingdom of Cambodia, 2021)

No.

Parameter

Unit

Standard

Waterbody type I

Waterbody type II

Coastal water

1

pH

 

6.5 – 8.5

6.5 – 8.5

7.0 – 8.3

2

Dissolved Oxygen (DO)

mg/l

> 3

>4

>8

3

BOD5

mg/l

<8

<6

-

4

CODMn

mg/l

<10

<8

<8 1

5

Total Suspended Solid (TSS)

mg/l

<100

<100

<80

6

Salinity

mg/l

<1000

<1000

-

7

Nitrate (NO3 as N)

mg/l

<2.4

<1.2

<0.06

8

Total Nitrogen (T-N)

mg/l

<3

<2

<2

9

Total Phosphorus (T-P)

mg/l

<0.25

<0.15

<0.09

10

Oil or Grease

mg/l

-

-

<0.14

Note:

-         Waterbody type I: refers to close waterbody type such as lake, pond, reservoir, wetland, including stream, tributary, channel, and drainage, whose having no inflow water in dry season. 

-         Waterbody type II: refers to open waterbody type such as river, stream, including stream, tributary, channel, and drainage, whose having inflow water in dry season.

-         (-): no value

-         (1): refer to chemical oxygen demand base on potassium permanganate (COD­OH)

 

Table 2: Standard water quality of public waterbody for public health protection (Royal Government of the Kingdom of Cambodia, 2021)

No.

Parameter

Unit

Standard

1

Carbon tetrachloride (CCl4)

µg/l

<4

2

Hexachlorobenzene (C6Cl6)

µg/l

<0.03

3

DDT

µg/l

<1

4

Aldrin (C12H8Cl6O)

µg/l

<0.01

5

Dieldrin (C12H8Cl6O)

µg/l

<0.01

6

Endrine (C10H13NO3)

µg/l

<0.005

7

Isodrine (C12H8Cl6)

µg/l

<0.005

8

Tetrachloroethylene (C2Cl4)

µg/l

<10

9

Hexachlorobutadiene (C4Cl6)

µg/l

<0.01

10

Chloroform (CHCl3)

µg/l

<300

11

1,2-Dichloroethylene (C2H2Cl2)

µg/l

<40

12

Trichloroethylene (C2HCl3)

µg/l

<10

13

1,2,4-Trichlorobenzene (C6H3Cl3)

µg/l

<0.4

14

Hexachlorocyclohexane (C6H6Cl6)

µg/l

<0.05

15

Benzene (C6H6)

µg/l

<10

16

Cadmium (Cd)

µg/l

<3

17

Silver (Hg)

µg/l

<0.5

18

Organic Silver (CH3Hg+ and C6H6Hg)

µg/l

Not available

19

Lead (Pb)

µg/l

<10

20

Chromium ion, valent 6 (Cr6+)

µg/l

<50

21

Arsenic (As)

µg/l

<10

22

Selenium (Se)

µg/l

<10

23

Polychlorinated biphenyls (PCB)

µg/l

Not available

24

Cyanide (CN)

µg/l

<5

25

Dichloromethane (CH2Cl2)

µg/l

<20

26

Total coliforms

MPN/100mL

<1000

 

Table 3: Standards of the quantity of toxic chemicals or hazardous substances contained in hazardous waste which is allowed to be disposed in sanitary landfills (MoE, 2015)

 

 

No.

 

Chemical Name

 

Unit (mg/kg of dry waste)

Maximum Condensation of Toxic Chemicals in Waste

1

Arsenic and its compounds (As)

mg/kg

< 40

2

Cadmium and its compounds (Cd)

mg/kg

< 5.0

3

Chromium and its compounds (Cr)+6

mg/kg

< 380

4

Copper and its compounds (Cu)

mg/kg

< 190

5

Lead and its compounds (Pb)

mg/kg

< 420

6

Mercury and its compounds (Hg)

mg/kg

< 10

7

Molybdenum and its compounds (Mo)

mg/kg

< 57

8

Nickel and its compounds (Ni)

mg/kg

< 75

9

Selenium and its compounds (Se)

mg/kg

< 100

10

Zinc and its compounds (Zn)

mg/kg

< 500

11

Cyanide and its compounds (CN)

mg/kg

< 50

12

Fluorine and its compounds (F)

mg/kg

< 400

13

Manganese and its compounds (Mn)

mg/kg

< 500

14

Benzene (C6H6)

mg/kg

< 1.0

15

Toluene (C6H5CH3)

mg/kg

< 130

16

Ethyl Benzene (C6H5CH2CH3)

mg/kg

< 50

17

Xylene (C6H4C2H6)

mg/kg

< 25

18

Phenol (C6H6O)

mg/kg

< 40

19

Cresol (CH3C6H4OH)

mg/kg

< 5.0

20

Styrene (C6H5CH=CH2)

mg/kg

< 100

21

Polyhydroxyalkanoates (All of 10 kinds of  PHA)

mg/kg

< 40

22

Naphthalene (C10H8)

mg/kg

< 40

23

Phenanthrene (C14H10)

mg/kg

< 40

24

Anthracene (C14H10)

mg/kg

< 40

25

Fluoranthene (C16H10)

mg/kg

< 40

26

Benz(a)anthracene (C18H12)

mg/kg

< 40

27

Chrysene (C18H12)

mg/kg

< 40

28

Benzo(k)fluoranthene (C20H12)

mg/kg

< 40

29

Benzopyrene (C20H12)

mg/kg

< 40

30

Benzo(ghi)pyrene (C22H12)

mg/kg

< 40

31

Indeno(1 2 3-cd)pyrene (C22H12)

mg/kg

< 40

32

Dichloromethane (CH2Cl2)

mg/kg

< 10

34

Trichloromethane (CHCl3)

mg/kg

< 10

35

Carbon Tetrachloride (CCl4)

mg/kg

< 1.0

36

Tetracholoethylene (Cl2C=CCl2)

mg/kg

< 60

37

1,1-dichloroethane (C2H4Cl2)

mg/kg

< 40

38

1,2-dichloroethane (ClCH2-CH2Cl)

mg/kg

< 15

39

Vinyl Chloride (C2H3Cl)

mg/kg

< 4.0

40

1,1,1-trichloroethane (CH3CCl3)

mg/kg

< 0.1

41

1,1,2-dichloroethane (C2H3Cl3)

mg/kg

< 15

42

Chlorobenzene (C6H5Cl)

mg/kg

< 10

 

Standards of the quantity of toxic chemicals or hazardous substances allowed in soils (MoE, 2015)

 

 

No.

 

Chemical Name

Unit (mg/kg of dry waste)

Maximum Condensation of Toxic Chemicals Allowed in Soils

1

Arsenic and its compounds (As)

mg/kg

<15

2

Barium and it compounds (Ba)

mg/kg

< 160

3

Cadmium and its compounds (Cd)

mg/kg

< 0.8

4

Chromium and its compounds (Cr)+6

mg/kg

< 100

5

Copper and its compounds (Cu)

mg/kg

< 125

6

Lead and its compounds (Pb)

mg/kg

< 85

7

Mercury and its compounds (Hg)

mg/kg

< 0.3

8

Molybdenum and its compounds (Mo)

mg/kg

< 3.0

9

Nickel and its compounds (Ni)

mg/kg

< 35

10

Selenium and its compounds (Se)

mg/kg

< 0.7

11

Zinc and its compounds (Zn)

mg/kg

< 140

12

Manganese and its compounds (Mn)

mg/kg

< 300

13

Cobalt (Co)

mg/kg

< 9

14

Antimony (Sb)

mg/kg

< 3

15

Beryllium (Be)

mg/kg

< 1.1

16

Silver (Ag)

mg/kg

< 1.1

17

Thorium (Th)

mg/kg

< 1

18

Vanadium (V)

mg/kg

< 42

19

Free cyanide(CN)

mg/kg

< 1

20

Bromine (Br)

mg/kg

< 20

21

Fluorine and its compounds (F)

mg/kg

< 400

22

Benzene (C6H6)

mg/kg

< 0.01

23

Toluene (C6H5CH3)

mg/kg

< 0.01

24

Ethyl Benzene (C6H5CH2CH3)

mg/kg

< 0.03

25

Xylene (C6H4C2H6)

mg/kg

< 0.1

26

Phenol (C6H6O)

mg/kg

< 0.05

27

Styrene (C6H5CH=CH2)

mg/kg

< 0.3

28

Polyhydroxyalkanoates (All of 10 kinds of  PHA)

mg/kg

 

< 1

29

Naphthalene (C10H8)

mg/kg

< 1

30

Phenanthrene (C14H10)

mg/kg

< 1

31

Anthracene (C14H10)

mg/kg

< 1

32

Fluoranthene (C16H10)

mg/kg

< 1

33

Benz(a)anthracene (C18H12)

mg/kg

< 1

34

Chrysene (C18H12)

mg/kg

< 1

35

Benzo(k)fluoranthene (C20H12)

mg/kg

< 1

36

Benzopyrene (C20H12)

mg/kg

< 1

37

Benzo(ghi)pyrene (C22H12)

mg/kg

< 1

38

Indeno(1 2 3-cd)pyrene (C22H12)

mg/kg

< 1

39

Dichloromethane (CH2Cl2)

mg/kg

< 0.4

40

Trichloromethane (CHCl3)

mg/kg

< 0.02

41

Carbon Tetrachloride (CCl4)

mg/kg

< 0.4

42

Trichloroethylene (C2HCl3)

mg/kg

< 0.1

 

 

References

Royal Government of the Kingdom of Cambodia (2021). Sub-Decree No. 103 ANKr/BK on the amendment of article 4, 9, 11, 12, 17, Annex 2, Annex 3, Annex 4 and, Annex 5 of the Sub-Decree No. 27 ANKr/BK dated April 6, 1999 on Water Pollution Control. Kingdom of Cambodia. https://data.opendevelopmentcambodia.net/en/laws_record/sub-decree-no-103-on-the-amendment-of-article-4-article-9-article-11-article-12-article-17-and-tabl  

MoE (2015). Prakas No 387 Br.K.B.Sth on the Launch of Standards of the Quantity of Toxins or Hazardous Substances Allowed to be Disposed.  Ministry of Environment, Kingdom of Cambodia. https://moe.gov.kh/wp-content/uploads/2017/02/Prakas_2015_Standard-of-HS-in-Waste-and-in-Soil.pdf       

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