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

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