|
To qualify for Class C the Dissolved Oxygen (DO) should be 4 mg/l or
more (IS- 2296-1982)
As per Indian standards (IS- 2296-1982)
| Class |
DO Quantity required |
| A |
6 mg/l or more |
| B |
5 mg/l or more |
| C |
4 mg/l or more |
| D |
4 mg/l or more |
| E |
NA |
| Below E |
Not Meeting A, B, C, D & E Criteria |
|
Source: Central Pollution Control Board
|