| WQI Classes | Types of Water | Possible Uses |
| 0 - 25 | Excellent quality | Drinking water, irrigation and industries |
| >25 - 50 | Good quality | Drinking water, irrigation and industries |
| >50 - 75 | Bad quality | Irrigation and industries |
| >75 - 100 | Very bad quality | Irrigation |
| >100 | Non-drinking water | Appropriate treatment required before use |