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Environmental Standards
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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