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வாட்டர் specification

INDIAN STANDARD SPECIFICATIONS FOR DRINKING WATER
IS: 10500
S.NO. Parameter Requirement
desirable Limit
Remarks
1. Colour 5 May be extended up to 50 if toxic
substances are suspected
2. Turbidity 10 May be relaxed up to 25 in the
absence of alternate
3. pH 6.5 to 8.5 May be relaxed up to 9.2 in the
absence
4. Total Hardness 300 May be extended up to 600
5. Calcium as Ca 75 May be extended up to 200
6. Magnesium as Mg 30 May be extended up to 100
7. Copper as Cu 0.05 May be relaxed up to 1.5
8. Iron 0.3 May be extended up to 1
9. Manganese 0.1 May be extended up to 0.5
10. Chlorides 250 May be extended up to 1000
11. Sulphates 150 May be extended up to 400
12. Nitrates 45 No relaxation
13. Fluoride 0.6 to 1.2 If the limit is below 0.6 water should
be rejected, Max. Limit is extended
to 1.5
14. Phenols 0.001 May be relaxed up to 0.002
15. Mercury 0.001 No relaxation
16. Cadmium 0.01 No relaxation
17. Selenium 0.01 No relaxation
18. Arsenic 0.05 No relaxation
19. Cyanide 0.05 No relaxation
20. Lead 0.1 No relaxation
21. Zinc 5.0 May be extended up to 10.0
22. Anionic detergents
(MBAS)
0.2 May be relaxed up to 1
23. Chromium as Cr+6 0.05 No relaxation
24. Poly nuclear aromatic
Hydrocarbons
-- --
25. Mineral Oil 0.01 May be relaxed up to 0.03
26. Residual free Chlorine 0.2 Applicable only when water is
chlorinated
27. Pesticides Absent --
28. Radio active -- --

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