Drinking
Water Quality Standards
Water Quality Parameters and BIS standards for various chemical and biological constituents
S.No. |
Parameters |
Drinking water
IS 10500 : 2012 |
Permissible Limit |
Maximum Limit |
1 |
Odor |
Agreeable |
Agreeable |
2 |
Taste |
Agreeable |
Agreeable |
3 |
pH |
6.5 to 8.5 |
No relaxation |
4 |
TDS (mg/l) |
500 |
2000 |
5 |
Hardness (as CaCO3) (mg/l) |
200 |
600 |
6 |
Alkalinity (as CaCO3) (mg/l) |
200 |
600 |
7 |
Nitrate (mg/l) |
45 |
No relaxation |
8 |
Sulfate (mg/l) |
200 |
400 |
9 |
Fluoride (mg/l) |
1 |
1.5 |
10 |
Chloride (mg/l) |
250 |
1000 |
11 |
Turbidity (NTU) |
1 |
5 |
12 |
Arsenic (mg/l) |
0.01 |
No relaxation |
13 |
Copper (mg/l) |
0.05 |
1.5 |
14 |
Cadmium (mg/l) |
0.003 |
No relaxation |
15 |
Chromium (mg/l) |
0.05 |
No relaxation |
16 |
Lead (mg/l) |
0.01 |
No relaxation |
17 |
Iron (mg/l) |
1.0 |
No relaxation |
18 |
Zinc (mg/l) |
5 |
15 |
19 |
Fecal Coliform (cfu) |
0 |
0 |
20 |
E. Coli (cfu) |
0 |
0 |
