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Overview of the Water quality in major river systems of India
  
| Class A:
River water fit for drinking after proper disinfection with the addition of chlorine or
bleaching powder. |
Class
B: This water is fit for bathing. |
| Class
C: Water fit for drinking only after proper treatment (screening to remove
physical matters or particulate such as paper, plastic, etc. |
Class
D: This is fit for fish and wildlife. |
Class E: Suitable only for industrial cooling,
irrigation, etc. |
|