| Tolerance Limits of Selected Water Quality Parameters for Inland Surface Water Prescribed for Different uses by Bureau of Indian Standards in India (March 2002) | ||||||
| Constituent | Unit | Designated use Classes of Inland Surface water | ||||
| A | B | C | D | E | ||
| PH | Micromho/Cm/Max | 6.5-8.5 | 6.5-8.5 | 6.5-8.5 | 6.5-8.5 | 6.5-8.5 |
| Electric Conductivity at 250C | ||||||
| Calcium (Ca) | ||||||
| Magnesium (Mg) | ||||||
| Iron (Fe) | ||||||
| Free Ammonia (NH4) | ||||||
| Chloride (CT) | ||||||
| Fluoride (F) | ||||||
| Sulphate (SO4) | ||||||
| Nitrate (NO3) | ||||||
| Dissolved Oxygen (DO) | ||||||
| Biochemical Oxygen Demand (BOD) | ||||||
| Total Coliform | ||||||
| Arsenic (As) | ||||||
| Boron (B) | ||||||
| Cadmium (Cd) | ||||||
| Chromium (CR) | ||||||
| Coper (Cu) | ||||||
| Cyanide (Cn) | ||||||
| Lead (Pb) | ||||||
| Maganese (Mn) | ||||||
| Mercury (Hg) | ||||||
| Zinc (Zn) | ||||||
| Phenolic Compounds (C6H5OH) | ||||||
| Total Hardness (CaCo3) | ||||||
| Sodium Percentage | ||||||
| Sodium Absorption Ratio (SAR) | ||||||
