Page 325 - Industrial Wastewater Treatment, Recycling and Reuse
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298 Industrial Wastewater Treatment, Recycling, and Reuse
Table 7.6 Designated best uses of water
Designated best use Class Criteria
Drinking water source without A 1. Total coliform organism
conventional treatment but MPN/100 mL shall be 50 or
after disinfection less
2. pH between 6.5 and 8.5
3. Dissolved oxygen 6 mg/L or
more
4. Biochemical oxygen demand
5 days 20 C, 2 mg/L or less
Outdoor bathing (organized) B 1. Total coliform organism
MPN/100 mL shall be 500
or less
2. pH between 6.5 and 8.5
3. Dissolved oxygen 5 mg/L or
more
4. Biochemical oxygen demand
5 days 20 C, 3 mg/L or less
Drinking water source after C 1. Total coliform organism
conventional treatment MPN/100 mL shall be 5000
and disinfection or less
2. pH between 6 and 9
3. Dissolved oxygen 4 mg/L or
more
4. Biochemical oxygen demand
5 days 20 C, 3 mg/L or less
Propagation of wildlife D 1. pH between 6.5 and 8.5
and fisheries 2. Dissolved oxygen 4 mg/L or
more
3. Free ammonia (as N)
4. Biochemical oxygen demand
5 days 20 C, 2 mg/L or less
Irrigation, industrial cooling, E 1. pH between 6.0 and 8.5
controlled waste disposal 2. Electrical conductivity at
25 C micro mhos/cm, max-
imum 2250
3. Sodium absorption ratio
maximum 26
4. Boron maximum 2 mg/L
Below-E Not meeting any of the A, B, C,
D, and E criteria
Source: Hydrology and Water Resources Information System for India & CPCB.
