Correct option is B
| Parameter |
Acceptable Limit |
Permissible Limit in Absence of Alternate Source |
| Total suspended solids (mg/L) |
500 |
2000 |
| Turbidity (NTU) |
1 |
10 |
| Colour (TCU) |
5 |
25 |
| Taste & Odour (TON) |
1 |
3 |
| Total dissolved solids (mg/L) |
500 |
2000 |
| Alkalinity (mg/L as CaCO3) |
200 |
600 |
| pH |
7-8.5 |
< 6.5 & > 9.2 |
| Hardness (mg/L as CaCO3) |
200 |
600 |
| Chloride content (mg/L) |
0.15 |
0.15 |
| Nitrite (mg/L) |
0 |
0 |
| Nitrate (mg/L) |
45 |
No Relaxation |
| Fluoride content (mg/L) |
1 |
1.5 |
| Iron as Fe (mg/L) |
1(Old=0.3) |
No Relaxation |
| Sulphate (mg/L) |
200 |
400 |
| Calcium (mg/L) |
75 |
200 |
| Free residual Chlorine (mg/L) |
0.2 |
1 |
| Total Arsenic as As (mg/L) |
0.01 |
NO Relaxation (Old=0.05) |
| Uranium, mg/l |
0.03 |
No relaxation |
