L 2 effluent standards and stream standards
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The document outlines water quality criteria and effluent standards for various designated best use classifications of surface water, including drinking water sources, outdoor bathing, and irrigation. Each classification specifies parameters such as total coliforms, pH, dissolved oxygen, and biochemical oxygen demand that must be met for safe usage. Additionally, the document details effluent standards for treated effluent disposal into different environments, ensuring regulatory compliance for industrial and municipal waste discharge.
L 2 effluent standards and stream standards
- 1. INDUSTRIAL WASTE L-2 Water quality criteria and Effluent Standards INDUSTRIAL WASTE TREATMENT
- 2. DESIGNATED BEST USE CLASSIFICATION Water Quality Criteria USE CLASSIFICATION OF SURFACE WATER
- 3. Designated- Best-Use Class of water Criteria Drinking Water Source without conventional treatment but after disinfection A 1.Total Coliforms OrganismMPN/100ml shall be 50 or less 2.pH between 6.5 and 8.5 3.Dissolved Oxygen 6mg/l or more 4.Biochemical Oxygen Demand Water Quality Criteria disinfection 4.Biochemical Oxygen Demand 5 days 20oC 2 mg/l or less Outdoor bathing (Organised) B 1.Total Coliforms Organism MPN/100ml shall be 500 or less 2.pH between 6.5 and 8.5 3.Dissolved Oxygen 5mg/l or more 4.Biochemical Oxygen Demand 5 days 20oC 3 mg/l or less
- 4. Drinking water source after conventional treatment and disinfection C 1.Total Coliforms Organism MPN/100ml shall be 5000 or less 2.pH between 6 to 9 3.Dissolved Oxygen 4 mg/l or more 4.Biochemical Oxygen Demand 5 days 20oC 3 mg/l or less Propagation of Wild life and Fisheries D 1.pH between 6.5 to 8.5 2.Dissolved Oxygen 4 mg/l or more 3.Free Ammonia (as N) 1.2 mg/l or lessFisheries 3.Free Ammonia (as N) 1.2 mg/l or less Irrigation, Industrial Cooling, Controlled Waste disposal E 1.pH betwwn 6.0 to 8.5 2.Electrical Conductivity at 25oC micro mhos/cm Max.2250 3.Sodium absorption Ratio (SAR) Max. 26 4.Boron Max. 2mg/l Below -E Not Meeting A, B, C, D & E Criteria
- 7. S.No. Parameter Standards for disposal of treated effluent in Inland surface water Public Sewer Land for irrigation Marine coastal areas 1. 2. 3. (a) (b) (c) (d) 1. Colour and odour See Note-1 --- See Note-1 See Note-1 2. Suspended Solids, mg/l, Max 100 600 200 (a) For process waste water-100 (b) For coolingmg/l, Max (b) For cooling water effluent-10 per cent above total suspended matter of influent cooling water. 3. Particle size of suspended solids Shall pass 850 micron IS Sieve --- --- (a) Floatable solids, Max 3 mm (b) Settleable solids Max 850 microns.
- 8. Note :- 1. All efforts should be made to remove colour and unpleasant odour as far as practicable. 2. The standards mentioned in this notification2. The standards mentioned in this notification shall apply to all the effluents discharged such as industrial mining and mineral processing activities municipal sewage etc.
- 9. 4 . Dissolved solids (inorganic), mg/a, mac 2100 2100 2100 --- 5 . pH value 5.5 to 9.0 5.5 to 9.0 5.5 to 9.0 5.5 to 9.0 6 . Temperature oC, Max Shall not exceed 40 in any section of the stream within 15 45 at the point of discharge --- 45 at the point of discharge within 15 meters down stream from the effluent outlet 7 . Oil and grease, mg/l, max 10 20 10 20 8 . Total residual chlorine, mg/l, Max. 1.0 --- --- 1.0
- 10. 9. Ammonical nitrogen (as N), mg/l, Max. 50 50 --- 50 10. Total Kjeldahl nitrogen (as N), mg/l, Max. 100 --- --- 100 11. Free Ammonia (as NH3), mg/l, Max. 5.0 --- --- 5.0 12. Biochemical Oxygen Demand (5 days at 20oC) 30 350 100 100 Demand (5 days at 20oC) Max. 13. Chemical Oxygen Demand, mg/l, Max. 250 --- --- 250 14. Arsenic (as As), mg/l, Max. 0.2 0.2 0.2 0.2 15. Mercury (as Hg), mg/l, Max. 0.01 0.01 --- 0.01
- 11. 16. Lead (as Pb), mg/l, Max. 0.1 1.0 --- 1.0 17. Cadmium (as Cd), mg/l, Max. 2.0 1.0 --- 2.0 18. Hexavalent chromium (as Cr+6) mg/l, Max. 0.1 2.0 --- 1.0 19. Total chromium as (Cr), mg/l, Max. 2.0 2.0 --- 2.0 20. Copper (as Cu), mg/l, Max. 3.0 3.0 --- 3.0 21. Zinc (as Zn), mg/l, Max. 5.0 15 --- 15 22. Selenium (as Se), mg/l, Max. 0.05 0.05 --- 0.05 23. Nickel (as Ni), mg/l, Max. 3.0 3.0 --- 5.0 24. Boron (as B), mg/l, Max. 2.0 2.0 2.0 --- 25. Percent Sodium, Max. --- 60 60 ---
- 12. 26. Residual sodium carbonate, mg/l, Max. --- --- 5.0 --- 27. Cyanide (as CN), mg/l, Max. 0.2 2.0 0.2 0.2 28. Chloride (as Cl), mg/l, Max. 1000 1000 600 (a) 29. Fluoride (as F), mg/l, Max. 2.0 15 --- 15 30. Dissolved Phosphates (as P), mg/l, Max. 5.0 --- --- --- 31. Sulphate (as SO4), mg/l, Max. 1000 1000 1000 --- 32. Sulphide (as S), mg/l, Max. 2.0 --- --- 5.0 33. Pesticides Absent Absent Absent Absent 34. Phenolic compounds (as C6H5OH), mg/l, Max. 1.0 5.0 --- 5.0 35. Radioactive materials (a) Alpha emitters MC/ml, Max. (b) Beta emitters uc/ml, Max. 10-7 10-6 10-7 10-6 10-8 10-7 10-7 10-6
- 13. Objective Questions 1. As per effluent standards, for disposal into the ocean pH value of treated effluent shall be __________. 2. As per designated best use classification of surface waters, for Drinking Water Source without conventional treatment but after disinfection, MPN shall be ___________________. 3. As per designated best use classification of surface waters, Propagation of Wild life and Fisheries, DO shall be ___________________. 4. As per designated best use classification of surface waters, Class E corresponds to water used for _________________________________ purpose
- 14. 5. Standard for disposal of treated effluent in inland surface waters, for pH is ___________. 6. Standard for disposal of treated effluent in sewers, for BOD is ___________. 7. Standard for disposal of treated effluent in land for7. Standard for disposal of treated effluent in land for irrigation, for SS is ___________. (similar objective questions can be asked on water quality criteria and effluent standards)
- 15. Theory questions 1. Explain Designated Best Use Classification of Surface water given by CPCB. Give effluent standards for at least2. Give effluent standards for at least 10 pollutants. 3. Write Short note on effluent standards.