| Sample Site ID | July 2006 | July 2017 | ||||
| WiQi | WQI | Classification (QI) | WiQi | WQI | Classification (QI) | |
| S1 | - | - | - | 198.92 | 170.1 | Unsuitable for drinking |
| S2 | 105.58 | 90.26 | Very bad | 267.13 | 228.38 | Unsuitable for drinking |
| S3 | 114.51 | 97.89 | Very bad | 503.44 | 430.4 | Unsuitable for drinking |
| S4 | 129.10 | 110.40 | Unsuitable for drinking | 237.17 | 202.8 | Unsuitable for drinking |
| S5 | - | - | - | 388.12 | 331.8 | Unsuitable for drinking |
| S6 | 52.68 | 45.03 | Good | 296.88 | 253.1 | Unsuitable for drinking |
| S7 | 62.86 | 53.74 | Poor | 284.68 | 243.4 | Unsuitable for drinking |
| S8 | 60.10 | 51.38 | Poor | 352.21 | 301.1 | Unsuitable for drinking |
| S9 | 83.085 | 71.03 | Poor | 405.78 | 346.9 | Unsuitable for drinking |