Parameters | Acceptable limit |
pH value | 6.5 - 8.5 |
Colour (Hazen) | 5 |
Turbidity, NTU | 1 |
Total Dissolved Solids (TDS) (mg/l) | 500 |
Total alkalinity (mg/l) | 200 |
Total hardness (mg/l) | 200 |
Calcium (mg/l) | 75 |
Magnesium (mg/l) | 30 |
Chloride (mg/l) | 250 |
Sulphate (mg/l) | 200 |
Nitrate (mg/l) | 45 |
Iron (mg/l) | 0.3 |
Total Coliform (MPN/100) | Absent |
Faecal coliform | Absent |
E. coli | Absent |