Table 2 The values of WQI and suitable for use purpose
Values | Water quality | Suitable for use purpose |
|---|---|---|
91–100 | Very good | Used good for domestic water supply purposes |
76–90 | Good | Used good water quality suitable for use for domestic water supply but need suitable treatment measures |
51–75 | Average | Used for irrigation and other equivalent purposes |
26–50 | Bad | Used for navigation and other equivalent purposes |
10–25 | Poor | Water is heavily tarnished, needing treatment measures |
<  10 | Very poor | Contaminated water, and needs to be remedied and treated |