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Home » About Ministry » Environment » Standards and Norms » Specific Industrial Effluent Standards

Specific Industrial Effluent Standards

Industrial Effluents Standards
Tolerance Limits for Industrial Effluents Discharged into Inland Surface Waters

Part - 1
Tanning Industry

Characteristics	Tolerance Limit
Colour and odour	Absent * *
Total dissolved solids, mg/L, Max	2100
Suspended solids, mg/L, Max	100
Biochemical oxygen demand
(5 days at 20⁰ C) mg/L, Max	100
Chlorides as (Cl) mg/L, Max	600
Hexavalent chromium (as Cr) mg/L, Max	0.1
Total chromium (as Cr) mg/L, Max	2
Sulphide (as S) mg/L, Max	2
Sodium %, Max	60
Chemical oxygen demand mg/L, Max	250
pH Value	6.0-9.0

** For colour and odour, no requirements have been laid down standard but it is recommended that, as far as practicable, colour and unpleasant odour should be absent in the standards.

Part - II
Wool Processing Industries

Characteristics	Tolerance Limit
Suspended Solids, mg/L	100
Biochemical Oxygen Demand (5 days at 20⁰ C), mg/L	100
Oil and grease, mg/L	10
Chemical Oxygen Demand, mg/L	250
Total Chromium (as Cr), mg/L	2
Sulphide (as S), mg/L	2
Phenolic compounds (as C₆ h₅ OH), mg/L	5
pH Value	5.5-9.0
Temperature ⁰ C	40

Part - III
Fermentation Industries

Characteristics	Tolerance Limit
pH	5.5 to 9.0
TSS, mg/1, max	100
BOD 5 days at 20⁰ C mg/l, max	60

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Part - IV
Vegetable Ghee and Oil Industries

Characteristics	Tolerance Limit
BOD5 days at 20⁰ C, mg/L Max	100
COD, mg/l, Max	250
pH	9-Jun
Oil and Grease, mg/l, Max	10
Nickel, mg/l, Max	3

Part - V
Paper and Pulp Industries

Characteristics	Tolerance Limits
pH	5.5-9
Suspended Solids, mg/l	100
BOD5 days at 20⁰C, mg/l Max	100

Part - VI
Dairy Industry

S.N.	Characteristics	Tolerance Limits
1	pH	5.5-8.5
2	TSS mg/litre, Max	150
3	BOD (5 days at 20⁰ C) mg/litre, Max	100
4	Oil and Grease, mg/litre, Max	10
5	COD, mg/litre, Max	250

Part-VII
Sugar Industry

S.N.	Characteristics	Tolerance Limits
1	pH	5.5-8.5
2	TSS mg/litre, Max	100
3	BOD (5 days at 20⁰ C) mg/litre, Max	100
4	COD, mg/litre, Max	250

Part-VIII
Cotton Textile Industry

S.N.	Characteristics	Tolerance Limits
1	pH	6.0-9.0
2	TSS mg/litre, Max	150
3	BOD (5 days at 20⁰ C) mg/litre, Max	100
4	COD, mg/litrre, Max	250

Part-IX
Soap Industries

S. N.	Characteristics	Tolerance Limits
1	BOD(5 days at 20⁰ C) mg/litre, Max	100
2	COD mg/ litre, Max	250
3	pH	6.0-9.0
4	TSS mg/litre, Max	200
5	Oil & Grease mg/litre, Max	10
6	Phenolic Compound mg/litre, Max	1

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