Table 2 Standards for drinking water (Bureau of Indian Standards (BIS) 2012; IS: 10500)

From: Assessment of water quality and suitability analysis of River Ganga in Rishikesh, India

S. No. Parameter Acceptable limit Permissible limit in the absence of alternate source
1. Colour (Hazen units) 5 15
2. Odour Agreeable Agreeable
3. pH value 6.5–8.5 No relaxation
4. Taste Agreeable Agreeable
5. Turbidity (NTU units) 1 5
6. Total dissolved solids (mg/l) 500 2000
7. Aluminium (mg/l) 0.03 0.2
8. Ammonia (mg/l) 0.5 No relaxation
9. Anionic detergents (as MBAS) (mg/l) 0.2 1.0
10. Barium (as Ba) (mg/l) 0.7 No relaxation
11. Boron (as B) (mg/l) 0.5 1.0
12. Cadmium (mg/l) 0.003 No relaxation
13. Calcium (as Ca) (mg/l) 75 200
14. Chloramines (as Cl2) (mg/l) 4.0 No relaxation
15. Chloride (as Cl) (mg/l) 250 1,000
16. Copper (mg/l) 0.05 1.5
17. Fluoride (mg/l) 1.0 1.5
18. Iron (mg/l) 0.3 No relaxation
19. Lead (mg/l) 0.01 No relaxation
20. Magnesium (mg/l) 30 100
21. Mercury (mg/l) 0.001 No relaxation
22. Nickel (mg/l) 0.02 No relaxation
23. Nitrate (mg/l) 45 No relaxation
24. Phenolic compounds (as C6H5OH) (mg/l) 0.001 0.002
25. Selenium (as Se) (mg/l) 0.01 No relaxation
26. Sulphate (as SO4) (mg/l) 200 400
27. Sulphide (as H2S) (mg/l) 0.05 No relaxation
28. Total alkalinity (as CaCO3) (mg/l) 200 600
29. Total arsenic (mg/l) 0.01 No relaxation
30. Total chromium 0.05 No relaxation
31. Total hardness (as CaCO3) (mg/l) 200 600
32. Zinc (mg/l) 5.0 15.0
33. Aldrin/Dieldrin (μg/l) 0.03 No relaxation
34. Chlorpyriphos (μg/l) 30 No relaxation
35. 2,4-D (μg/l) 30 No relaxation
36. DDT (μg/l) 1.0 No relaxation
37. Endosulfan (μg/l) 0.4 No relaxation
38. Radioactive α emitters (Bq/l) 0.1 No relaxation
39. Radioactive β emitters (Bq/l) 1.0 No relaxation
40. Total Coliform bacteria Shall not be detectable in any 100 ml sample