Water quality criteria

Designated-Best-Use

Class of water

Criteria

Drinking Water Source 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