EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ...

Annex III, Page No i
Annexure – 3
Drinking water standards (IS 10500: 1991) and surface water quality
standards
Drinking water Standards (IS 10500 : 1991)
S.No. Parameter Requirements
(Desirable
Limits)
Permissible
Limits in
absence of
alternative
source
1. Color, Hazen units, max 5 25
2. Odour Unobjectionable
-
3. Taste Agreeable -
4. Turbidity NTU, max 5 10
5. pH value 5.5 to 9.0 5.5 to 9.9
6. Total hardness (as CaCO3) mg/l, 300 600
max
7. Iron (as Fe) mg/l max 0.3 1.0
8. Chlorides (as Cl) mg/l max 250 1000
9. Free Chlorine mg/l, min 0.2 -
10. Dissolved solids mg/l, max 500 2000
11. Calcium (as Ca) mg/l, max 75 200
12. Copper (as Cu), mg/l max 0.5 1.5
13. Manganese (as Mn), mg/l max 0.1 0.3
14. Sulphate (as SO4), mg/l max 200 400
15. Nitrate (as NO3), mg/l max 45 100
16. Fluoride (as F), mg/l max 1.0 1.5
17. Phenolic compounds (as C 6 H 5 OH) 0.001 0.002
mg/lt, max
18. Mecrcuty (as Hg), mg/l max 0.001 0.001
19. Cadmium (as Cd), mg/l max 0.01 0.01
20. Selenium (as Se), mg/l max 0.01 0.01
21. Arsenic (as As) mg/l max 0.05 0.05
22. Cyanide (as CN), mg/l max 0.05 0.05
23. Lead (as Pb), mg/l max 0.05 0.05
24. Zinc (as Zn), mg/l max 5.0 15.0
25. Total chromium (as Cr), mg/lt, max 0.05 0.05
26. Aluminum (as Al), mg/lt, max 0.03 0.2
27. Boron, max 1.0 5.0