Environmental quality standards for water and effluent standards

Last update:2013-4-10

1. Ambient Standards

Water Quality Standards includes: drinking water standards, drinking water in covered container standards, groundwater standards and surface water standards.

1.1 Drinking Water Qualtiy Standards
1.2 Drinking Water Qualtiy in Covered Container
1.3 Groundwater Qualtiy Standards
1.4 Groundwater Qualtiy Standards for Drinking Purposes
1.5 Surface Water Quality Standards

2. Emission Standards

2.1 General Industrial Wastewater Discharge Standards
2.2 Standards for Specific Industries
2.3 Effluent Standards for Pig Farms
2.4 Gas Stataion Effluent Standards
2.5 Wastewater Discharge Standards from the Urban Areas

1.1 Drinking Water Quality Standards

A. Bacteriological Parameters

Paramenters	Units	Concetration
Faecal Coliform	MPN/100ml	0
Total Coliform	MPN/100ml	< 2.2
Entero virus	MPN/100ml	0

B. Physical - Chemical Parameters

No	Parameters	Unit	Concentration
No	Parameters	Unit	Minimum	Maximum
1	Aluminum	mg/l	0.1	0.2
2	Ammonia	mg/l	0.5	1.5
3	Chloride	mg/l	200	250
4	Copper	mg/l	1.0	2.0
5	Iron	mg/l	0.3	<1
6	Manganese	mg/l	0.1	0.5
7	Sodium	mg/l	200	250
8	Sulphate	mg/l	200	250
9	Hydrogen Sulphide	mg/l	0.05	0.1
10	Conductivity	us/cm	-	<1,000
11	Total dissolved solids	mg/l	500	600
12	Sodium Chloride	mg/l	100	300-350
13	Potential of Hydrogen	-	6.5	8.5
14	Temperature	°C	25	35
15	Hardness	mg/l	50	300
16	Turbidity	NTU	-	<10
17	Taste and Odour	-	-	Acceptable
18	Colour	TCU	-	5
19	Residual Chloride (if Chlorine disinfection is used)	mg/l	-	<0.2

C. Health Significant Chemical Parameters

No	Parameters	Unit	Maximum Concentration
1	Antimony	mg/l	0.005
2	Arsenic	mg/l	0.01 - 0.05
3	Barium	mg/l	0.7
4	Boron	mg/l	0.5
5	Cadmium	mg/l	0.003
6	Chromium	mg/l	0.05
7	Cyanide	mg/l	0.07
8	Fluoride	mg/l	1.5
9	Lead	mg/l	0.01
10	Mercury	mg/l	0.001
11	Nitrate	mg/l	50
12	Nitrite	mg/l	3
13	Selenium	mg/l	0.01

D. Priority Parameters

No	Parameters	Unit	Maximum Concentration
1	Iron	mg/l	<1
2	Manganese	mg/l	<0.5
3	Arsenic	mg/l	<0.05
4	Fluoride	mg/l	<1.5
5	Nitrate	mg/l	50
6	Nitrite	mg/l	3
7	Nitrite Nitrogen	mg/l	1
8	Potential of Hydrogen	-	6.5 - 8.5
9	Coliform	MPN/100ml	0
10	Conductivity	us/cm	1000
11	Residual Chloride (if Chlorine disinfection is used)	mg/l	0.2
12	Total Hardness	mg/l	<300
13	Turbidity	NTU	<10
14	Taste and Ordour	-	Acceptable

1.2 Drinking Water Quality in Covered Container

No	Parameters	Unit	Permitted Concentration
1	Arsenic	mg/l	0.01 - 0.05
2	Barium	mg/l	0.7
3	Boron	mg/l	0.5
4	Cadmium	mg/l	0.003
5	Chromium	mg/l	0.05
6	Copper	mg/l	2
7	Fluoride	mg/l	1.5
8	Lead	mg/l	0.01 - 0.05
9	Manganese	mg/l	0.5
10	Mercury	mg/l	0.001
11	Nitrate	mg/l	50
12	Iron	mg/l	0.3
13	Potential of Hydrogen	-	6.5 - 8.5
14	Hardness	mg/l	100 -300

1.3 Groundwater Quality Standards

No	Substances	Unit	Standard Value	Method of Measurement
I. Volatile Organic Compound
1	Benzene	mg/l	0.005	Purge and Trap Gas Chromatography or Purge and Trap Gas Chromatography/Mass Spectrometry
2	Carbon Tetrachloride	mg/l	0.005
3	1.2-Dichloroethane	mg/l	0.005
4	1.1-Dichloroethylene	mg/l	0.007
5	Cis-1.2-Dichloroethyline	mg/l	0.070
6	Trans-1.2-Dichloroethylene	mg/l	0.1
7	Dichloromethane	mg/l	0.005
8	Ethyl benzene	mg/l	0.7
9	Styrene	mg/l	0.1
10	Tetrachloroethylene	mg/l	0.005
11	Toluene	mg/l	1
12	Trichloroethylene	mg/l	0.005
13	Toluene	mg/l	0.2
14	Trichloroethylene	mg/l	0.005
15	Total Xylenes	mg/l	10
II. Heavy Metals
1	Cadmium	mg/l	0.003	Direct Aspiration/ Absorption Spectrometry or Inductively Coupled Plasma/Plasma Emission Spectroscopy
2	Hexavalent Chromium	mg/l	0.05
3	Copper	mg/l	1
4	Lead	mg/l	0.01
5	Manganese	mg/l	0.5
6	Nickel	mg/l	0.02
7	Zinc	mg/l	5
8	Arsenic	mg/l	0.01	Hydride Generation/ Atomic Absorption Spectrometry of Inductively Coupled Plasma / Plasma Emission Spectroscopy
9	Selenium	mg/l	0.01
10	Mercury	mg/l	0.001	Cold-Vapour Atomic Absorption Spectrometry / Plasma Emission Spectroscopy
III. Pesticides
1	Chlordane	mg/l	0.0002	Liquid-Liquid Extraction
2	Dieldrin	mg/l	0.00003	Gas Chromatography / Mass Spectrometry or Liquid-Liquid Extraction Gas Chromatography (Method I)
3	Heptachlor	mg/l	0.0004
4	Heptachlor Epoxide	mg/l	0.0002
5	DDT	mg/l	0.002
6	2,4D	mg/l	0.03	Liquid-Liquid Extraction Gas Chromatography
7	Atrazine	mg/l	0.003	Liquid-Liquid Extraction Gas Chromatography
8	Lindane	mg/l	0.0002	Liquid-Liquid Extraction Gas Chromatography (Method II)
9	Pentachlorophenol	mg/l	0.001	Liquid-Liquid Extraction Chromatography or Liquid-Liquid Extraction Gas Chromatography / Mass Spectrometry
IV. Others
1	Benzo (a)pyrene	mg/l	0.0002	Liquid-Liquid Extraction Chromatography or Liquid-Liquid Extraction Gas Chromatography / Mass Spectrometry
2	Cyanide	mg/l	0.2	Pyridine Barbituric Acid or Colorimetric or Iron Chromatography
3	PCBs	mg/l	0.0005	Liquid-Liquid Extraction Gas Chromatography (Method II)
4	Vinyl Chloride	mg/l	0.002	Purge and Trap Gas Chromatography or Purge and Trap Gas Chromatography/Mass Spectrometry

1.4 Groundwater Standards for Drinking Purposes

Characteristics	Parameters		Unit	Permitted Standard Value
Characteristics	Parameters		Unit	Suitable	Maximum
Physical	1	Colour	Platinum-Cobalt (Pt-Co)	5	15
	2	Turbidity	JTU	5	20
	3	Potential of Hydrogen	-	7.0 - 8.5	6.5 - 9.2
Chemical	4	Iron	mg/l	≤0.5	1
	5	Manganese	mg/l	≤0.3	0.5
	6	Copper	mg/l	≤1.0	1.5
	7	Zinc	mg/l	≤5.0	15
	8	Sulphate	mg/l	≤200	250
	9	Chloride	mg/l	≤250	600
	10	Fluoride	mg/l	≤0.7	1
	11	Nitrate	mg/l	≤15	45
	12	Total Hardness as CaCO3	mg/l	≤300	500
	13	Non-carbonate hardness as CaCO3	mg/l	≤200	250
Toxic chemical substances	14	Total solids	mg/l	≤600	1200
	15	Arsenic	mg/l	None	0.05
	16	Cyanide	mg/l	None	0.1
	17	Lead	mg/l	None	0.05
	18	Mercury	mg/l	None	0.001
	19	Cadmium	mg/l	None	0.01
	20	Selenium	mg/l	None	0.01
Bacteria	21	Coliform bacteria	MPN/100ml	<2.2	<2.2
	22	E. coli bacteria	-	None	None
	23	Standard plate count	Colonies/ml	≤500	-

1.5 Surface Water Quality Standards

No	Substances	Unit	Standard Value	Method of Measurement
1	Colour. Odour and Taste	-	N	-
2	Temperature	°C	N'	Thermometer
3	Potential of Hydrogen	-	5-9	Electronic pH Meter
4	Dissolved Oxygen	mg/l	6	Azide Modification
5	COD	mg/l	5	Potassium permanganate
6	BOD5	mg/l	1,5	Azide Modification at 20 degree C, 5 days
7	Total Coliform Bacteria	MPN/100ml	5000	Multiple Tube Fermentation
8	Faecal Coliform Bacteria	MPN/100ml	1000	Multiple Tube Fermentation
9	Nitrate-Nitrogen	mg/l	<5.0	Cadmium Reduction
10	Ammonia-Nitrogen	mg/l	0.2	Distillation Nesslerization
11	Phenols	mg/l	0.005	Distillation, 4-Amin anti-pyrenne
12	Copper	mg/l	0.1	Atomic Absorption Direct Aspiration
13	Nickel	mg/l	0.1
14	Manganese	mg/l	1.0
15	Zinc	mg/l	1.0
16	Cadmium	mg/l	0.005
17	Chromium, Hexavalent	mg/l	0.05
18	Lead	mg/l	0.05
19	Mercury	mg/l	0.002	Atomic Absorption Cold Vapour
20	Arsenic	mg/l	0.01	Atomic Absorption Direct Aspiration
21	Cyanide	mg/l	0.005	Direct Aspiration
22	Alpha-Radioactive	Becquerel/l	0.1	Pyridine-Barbituric
23	Beta-Radioactive	Becquerel/l	1.0	Counting machine
24	Total Organochlorine	mg/l	0.05	Gas Chromatography
25	DDT	mg/l	1.0
26	Alpha-BHC	mg/l	0.02
27	Dieldrin	mg/l	0.1
28	Aldrin	mg/l	0.1
29	Heptachlor and Heptachlor Epoxide	mg/l	0.2
30	Endrin	mg/l	None

2.1 General Industrial Wastewater Discharge Standards

2.1.1 Standards for General Industries

No	Parameters	Unit	Maximum Concentration
1	BOD5	mg/l	40
2	Ammonia Nitrogen	mg/l	4
3	Total Suspended Substances	mg/l	40
4	Potential of Hydrogen	-	6-9.5
5	Total Dissolved Substances	mg/l	3,500
6	Phenols	mg/l	0.3
7	Phosphorous	mg/l	1.0
8	Silver	mg/l	0.1
9	Zinc	mg/l	1.0
10	Sulphide	mg/l	1.0
11	Free Chlorine	mg/l	1.0
12	Chloride	mg/l	500
13	Iron	mg/l	2.0
14	Fluoride	mg/l	15
15	Cyanide	mg/l	0.1
16	Copper	mg/l	0.5
17	Lead	mg/l	0.2
18	Oil and Grease	mg/l	5
19	Nickel	mg/l	0.2
20	Mercury	mg/l	0.005
21	Manganese	mg/l	1.0
22	Arsenic	mg/l	0.25
23	Barium	mg/l	1.0
24	Cadmium	mg/l	0.03
25	Chromium	mg/l	0.1
26	Total Chromium	mg/l	0.5

2.1.2 Sugar Cane Factories

No	Parameters	Unit	Maximum Concentration
1	BOD5	mg/l	60
2	Total Suspended Substances	mg/l	100
3	Potential of Hydrogen	-	6-9.5

2.1.3 Textiles and Garments Factories with Dyeing of Yarns

No	Parameters	Unit	Maximum Concentration
1	BOD5	mg/l	40
2	Phenols	mg/l	1
3	Total Supended Substances	mg/l	40
4	Potential of Hydrogen	-	6-9.5

2.1.4 Pulp Products

No	Parameters	Unit	Maximum Concentration
1	BOD5	mg/l	90
2	Ammmonia-Nitrogen	mg/l	7
3	Phenols	mg/l	1
4	Total Suspended Substances	mg/l	60
5	Potential of Hydrogen	-	6-9.5

2.1.5 Paper Products

No	Parameters	Unit	Maximum Concentration
1	BOD5	mg/l	30
2	Total Suspended Substances	mg/l	30
3	Potential of Hydrogen	-	6-9.5

2.1.6 Slaughtering Factories

No	Parameters	Unit	Maximum Concentration
1	BOD5	mg/l	40
2	Ammmonia-Nitrogen	mg/l	4
3	Total Suspended Substances	mg/l	40
4	Potential of Hydrogen	-	6-9.5

2.2 Standards for Specific Industries

2.2.1 Factories that Contain Organic Substances

No	Types of Factories	Parameters
No	Types of Factories	Max BOD6	Max pH	Max TSS
1	Canned fish	40	6-9.5	50
2	Beer	30	6-9.5	30
3	Starch	70	6-9.5	80
4	Tannery	40	6-9.5	40
5	Yarn Dyeing	40	6-9.5	40
6	Pharmacy	40	6-9.5	40

2.2.2 Factories that Contain Inorganic Substances: Metal Plating

No	Parameters	Unit	Permitted Concentration
1	Potential of Hydrogen	-	6-9.5
2	Zinc	mg/l	5.0
3	Cyanide	mg/l	0.2
4	Total Suspended Substances	mg/l	30
5	Chrome	mg/l	0.3
6	Total Chrome	mg/l	2.0
7	Nickel	mg/l	0.2
8	Copper	mg/l	1.0
9	Total Heavy Metal	mg/l	6.0
10	Oil and Grease	mg/l	30

2.2.3 Battery Products

No	Parameters	Unit	Permitted Concentration
1	Lead	mg/l	0.2
2	Copper	mg/l	0.5
3	Zinc	mg/l	1
4	Animony	mg/l	1
5	Cadmium	mg/l	0.03
6	Chromium	mg/l	0.5
7	Nickel	mg/l	1.0
8	Mercury	mg/l	0.005
9	Potential of Hydrogen	-	6-9.5

2.3 Effluent Standards for Pig Farms

No	Parameters	Unit	Maximum Permitted Value
No	Parameters	Unit	Standard A	Standard B	Method for Examination
1	Potential of Hydrogen	mg/l	5-5.9	5-5.9	pH Meter
2	Biochemical Oxygen Demand	mg/l	60	100	Aside Modification or Membrance Electrode
3	Chemical Oxygen Demand	mg/l	300	400	Potassium Dichromate Digestion, Open Reflux or Closed Reflux
4	Suspended Solids	mg/l	150	200	Glass Fibre Filter Disc, Dry Evaporation 103-105 degree Celsius
5	Total Kjeldahl Nitrogen	mg/l	120	200	Kjeldahl; Colorimetric or Ammonia Selective Electrode

Standard A:: 1. Large Farm is more than 400 Livestock Units (LU); 2. Medium Farm is 60-400 LU.
Standard B:: 1. Small Farm is 6<60LU.; 2. 1LU equals 500kg.; 3. Weight of breeding pig = 170kg/head; 4. Weight of fattended pig = 60kg/head; 5. Weight of nursling pig = 12kg/head

2.4 Gas Station Effluent Standards

No	Parameters	Unit	Range or Maximum Permitted Value	Method of Examination
1	Potential of Hydrogen	-	5.5-9	pH Meter
2	Chemical Oxygen Demand	mg/l	200	Potassium Dichromate Digestion
3	Suspended Solid	mg/l	60	Glass Fibre Filter Disc
4	Oil and Grease	mg/l	15	Extract with solvent

2.5 Wastewater Discharge Standards from the Urban Area

2.5.1 Wastewater Discharge Standards

No	Parameters	Standards
		A	B	C	D	E
1	Biochemical Oxygen Demand	Not more than (mg/l)
		30	40	50	60	200
2	Suspended Solids	Not more than (mg/l)
		30	40	50	50	60
3	Settle able Solids	Not more than (mg/l)
		0.5	0.5	0.5	0.5	-
4	Total Dissolved Solids	Not more than (mg/l)
		3000	2500	2000	1500	-
5	Chemical Oxygen demand	Not more than (mg/l)
		120	130	150	350	400
6	Sulphide	Not more than (mg/l)
		1.0	1.0	3.0	4.0	-
7	Total Kjeldahl Nitrogen	Not more than (mg/l)
		35	35	40	40	-
8	Fat Oil and Grease	Not more than (mg/l)
		20	20	20	20	100
9	Temperature	Not more than (degree Celsius)
		40	40	40	40	40
10	Potential of Hydrogen	Not more than
		6-9.5	6-9.5	6-9.5	6-9.5	6-9.5

2.5.2 Classification of building according to the Wastewater Discharge Standards

No	Parameters	Size of Buildings	Standards
1	Buildings	Less than 100 rooms	D
		From 101 to 500 rooms	C
		Above 501 rooms	B
2	Hotels	Less than 60 rooms	D
		From 61-200 rooms	C
		Above 201 rooms	B
3	Dormitries	From 10 to 50 rooms	D
		From 51 to 250 rooms	C
		Above 251 rooms	B
4	Medical Centers, Hospitals, Clinic	No bed	C
		From 1 to 30 beds	B
		Above 31 beds	A
Classification of buildings per Area
5	Residential, Temple	From 5,000 to 10,000 sq m	E
5	Residential, Temple	Above 10,001 sq m	?
6	Entertainment zone, Health center swimming pool, Fitness Center	From 1,000 to 5,000 sq m	?
6		Above 5,001 sq m	B
7	School, Education instituions, College, Universities	From 5,000 to 25,000 sq m	B
7	School, Education instituions, College, Universities	Above 25,001 sq m	A
8	Office, Enterprises,Foreign and Private buildings, Hall	From 5,000 to 10,000 sq m	C
		From 10,001 to 55,000 sq m	B
		Above 55,001 sq m	A
9	Commercial Centers and Supermarkets	From 5,000 to 25,000 sq m	B
9	Commercial Centers and Supermarkets	Above 25,0001 sq m	A
10	Markets	From 500 to 1,000 sq m	D
		From 1,001 to 1,500 sq m	C
		From 1,501 to 2,500 sq m	B
		Above 2,501 sq m	A
11	Restaurants	Less than 100 sq m	E
		From 500 to 1,000 sq m	D
		Form 1,001 to 1,500 sq m	C
		From 1,501 to 2,500 sq m	B
		Above 2,501 sq m	A
12	Auto Service Center (Motorbike, Car)	From 500 to 1,000 sq m	D
		From 1,001 to 1,500 sq m	C
		From 1,501 to 2,500 sq m	B
		Above 2,501 sq m	A
13	Teminal Stations, Airport	From 5,000 to 10,000 sq m	C
		From 10,001 to 55,000 sq m	B
		Above 55,001 sq m	A
14	Slaughterhouse in City	From 500 to 1,000 sq m	D
		From 1,001 to 1,500 sq m	C
		From 1,501 to 2,500 sq m	B
		Above 2,501 sq m	A

2.5.3Wastewater Treatment Standards for Public Areas

No	Parameters	Standards					Method of Examination
		A	B	C	D	E
1	Biochemical Oxygen Demand	Not more than (mg/l)					Manometric method at 20 Celsius for 5 consecutive days
		30	40	50	60	200
2	Suspended Solids	Not more than (mg/l)					Evaporation at about 150 Celsius during 1 hour
		30	40	50	50	60
3	Settle able Solids	Not more than (mg/l)					Glass fibre filter disc
		0.5	0.5	0.5	0.5	-
4	Total Dissolved Solids	Not more than (mg/l)					Glass fibre filter disc
		3000	2500	2000	1500	-
5	Chemical Oxygen demand	Not more than (mg/l)					Potassium Digestion
		120	130	150	350	400
6	Sulphide	Not more than (mg/l)					Titration method
		1.0	1.0	3.0	4.0	-
7	Total Kjeldahl Nitrogen	Not more than (mg/l)					Kjeldahl method
		35	35	40	40	-
8	Fat Oil and Grease	Not more than (mg/l)					Extraction by solvents and separation of the weight of fat and grease
		20	20	20	20	100
9	Temperature	Not more than (degree Celsius)					Thermometer
		40	40	40	40	40
10	Potential of Hydrogen	Not more than					pH Meter
		6-9.5	6-9.5	6-9.5	6-9.5	6-9.5

2.5.4 Type of Public Areas for Wastewater Discharge

No	Parameters	Size of Buildings	Standards
1	History and cultural tourism place	From 5,000 to 10,000 sq m	E
		From 10,001 to 55,000 sq m	D
		Above 55,001 sq m	C
2	Public Park	From 5,000 to 10,000 sq m	C
		From 10,001 to 55,000 sq m	B
		Above 55,001 sq m	A
3	Amusement Park	From 5,000 to 10,000 sq m	C
		From 10,001 to 55,000 sq m	B
		Above 55,001 sq m	A
4	Water Park	From 5,000 to 10,000 sq m	C
		From 10,001 to 55,000 sq m	B
		Above 55,001 sq m	A
5	Marsh, Pond	From 5,000 to 10,000 sq m	C
		From 10,001 to 55,000 sq m	B
		Above 55,001 sq m	A
6	Main water drainage, second water drainage, water drainage along the road	From 5,000 to 10,000 sq m	C
		From 10,001 to 55,000 sq m	B
		Above 55,001 sq m	A

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