Saturday, 12 March 2016

1. PRIMARY WATER QUALITY CRITERIA FOR DESIGNATED - BEST - USE - CLASSES


Classification Category Tolerance Limit
Drinking Water Source without conventional treatment but after disinfections A
  1. Total Coliform Organism MPN/100 ml shall be 50 or less
  2. pH between 6.5 and 8.5
  3. Dissolved Oxygen 6mg/l or more 
  4. Biochemical oxygen demand 5 days 20o C l o2mg/r less
Outdoor Bathing       (Organized ) B
  1. Total Coliforms Organism MPN/100 ml shall be 500 or less
  2. pH between 6.5 and 8.5
  3. Dissolved Oxygen 5mg/l or more
  4. Biochemical Oxygen Demand 5 days 20oC 3mg/l or less
Drinking Water source after conventional treatment and disinfections C
  1. Total Coliforms Organism MPN/100 ml shall be 5000 or less
  2. pH between 6.5 and  8.5
  3. Dissolved Oxygen 4mg/l or more
  4. Biochemical Oxygen Demand 5 days 20oC 3mg/l or less
Propagation of Wild Life and Fisheries  D
  1. pH between 6.5 and 8.5
  2. Dissolved Oxygen 4mg/l or more
  3. Free Ammonia ( as N )1.2 mg/l or less
Irrigation  Industrial   Cooling,  Controlled waste disposal 
 E
  1. pH between 6.0 and 8.5
  2. Electrical Conductivity at 25oC micro mhos/cm Max. 2250
  3. Sodium absorption ratio Max. 26
  4. Boron Max. 2 mg/l
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