Water Quality Criteria

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Designated-Best-Use Class of water Criteria
Drinking WaterSource without
conventional treatment but after disinfection
A Total Coliforms Organism MPN/100ml shall be 50 or less
pH between 6.5 and 8.5
Dissolved Oxygen 6mg/l or more
Biochemical Oxygen Demand 5 days 20°C 2mg/l or less
Outdoor bathing (Organised) B Total Coliforms Organism MPN/100ml shall be 500 or less pH between 6.5 and 8.5 Dissolved Oxygen 5mg/l or more
Biochemical Oxygen Demand 5 days 20°C 3mg/l or less
Drinking water source after conventional treatment and disinfection C Total Coliforms Organism MPN/100ml shall be 5000 or less pH between 6 to 9 Dissolved Oxygen 4mg/l or more
Biochemical Oxygen Demand 5 days 20°C 3mg/l or less
Propagation of Wild life and Fisheries D pH between 6.5 to 8.5 Dissolved Oxygen 4mg/l or more
Free Ammonia (as N) 1.2 mg/l or less
Irrigation, Industrial Cooling, Controlled Waste disposal E pH betwwn 6.0 to 8.5
Electrical Conductivity at 25°C micro mhos/cm Max.2250
Sodium absorption Ratio Max. 26
Boron Max. 2mg/l
  Below-E Not Meeting A, B, C, D & E Criteria