| Maximum Permissible Limits for Industrial Effluent Discharges (2003) | ||||
| (mg/litre) | ||||
| Parameter | Into Inland Surface Waters Indian Standards 2490 (1974) | Into Public Sewers Indian Standards 3306 (1974) | Onland for Irrigation Indian Standards 3307 (1974) | Marine Coastal Area |
| pH | 5.9-9.0 | 5.5-9.0 | 5.5-9.0 | 5.5-9.1 |
| Biological oxygen demand (for 5 days at 200C) | ||||
| Chemical oxygen demand | ||||
| Suspended solids | ||||
| Total dissolved solids (inorganic) | ||||
| Temperature (0C) | ||||
| Oil and grease | ||||
| Phenolic Compounds | ||||
| Cyanides | ||||
| Sulphides | ||||
| Fluorides | ||||
| Total residual chlorine | ||||
| Pesticides | ||||
| Arsenic | ||||
| Cadmium | ||||
| Chromium (hexavalent) | ||||
| Copper | ||||
| Lead | ||||
| Mercury | ||||
| Nickel | ||||
| Selenium | ||||
| Zinc | ||||
| Chlorides | ||||
| Boron | ||||
| Sulphates | ||||
| Sodium (%) | ||||
| Ammoniacal nitrogen | ||||
| Radioactive materials | ||||
| Alpha emitters (milli curie/millilitre) | ||||
| Beta emitters (m curie/millilitre) | ||||
