receiving water standards

RECEIVING WATER STANDARDS

In the context of wastewater treatment, the term, 'receiving water ' is defined as a stream, river, lake, ocean or other body into which wastewater or treated effluent is discharged. The Central Pollution Control Board (CPCB) under the environment protection rules of 1986 in schedule VI, has set "General Standards for discharge of environmental pollutants" as effluents as given below:

1. Colour and odour 
2. Suspended solids not to exceed 100 mg/l
3. Particulate size of suspended particles should pass through 850 micron IS sieve
4. pH value should lie between 5.5 and 9
5. Temperature should not exceed 5 C more than receiving water temperature
6. Oil and grease should not exceed 10 mg/l
7. Total residual chlorine should not exceed 1 mg/l
8. Ammonical nitrogen as (N) should not exceed 50 mg/l
9. Total kjeldahl as ammonia should not exceed 100 mg/l
10. Free Ammonia should not exceed 5 mg/l
11. BOD for 3 days at 27C should not exceed 30 mg/l
12. COD should not exceed 250 mg/l
13. Arsenic should not exceed 0.2 mg/l
14. Mercury should not exceed 0.01 mg/l
15. Lead should not exceed 1 mg/l
16. Cadmium should not exceed 2 mg/l
17. Hexavalent chromium (Cr6+) should not exceed 0.1 mg/l
18. Copper should not exceed should not exceed 3 mg/l
19. Zinc should not exceed 5 mg/l
20. Selenium should not exceed 0.05 mg/l
21. Nickel should not exceed 3 mg/l
22. Cyanide should not exceed 0.2 mg/l
23. Fluoride should not exceed 2.0 should not exceed 
24. Sulphides should not exceed 2.0 mg/l
25. Dissolved Phosphates should not exceed 5.0 mg/l
26. Phenoile compounds should not exceed 1 mg/l
27. Radioactive materials
1. Alpha emitter should not exceed  10^-7 mg/l
2. Beta emitter should not exceed 10^-6 mg/l
28. Manganese should not exceed 2 mg/l
29. Iron should not exceed 3 mg/l
30. Vanadium should not exceed 0.2 mg/l
31. Nitrate Nitrogen should not exceed 10 mg/l