| Sample code | WQI | Water quality (grade) | ||||||
| Nov 17 | Jan 18 | Apr 18 | Jul 18 | Nov 17 | Jan 18 | Apr 18 | Jul 18 | |
| Sme | 8.87 | 13.92 | 36.13 | 10.49 | Excellent (A) | Excellent (A) | Excellent (A) | Excellent (A) |
| Bme | 62.22 | 88.56 | 39.70 | 19.66 | Poor (C) | Very poor (D) | Good (B) | Good (B) |
| Bkw | 2.34 | 7.44 | 12.94 | 46.69 | Excellent (A) | Excellent (A) | Excellent (A) | Good (B) |
| Wkw | 114.16 | 10.64 | 12.27 | 124.61 | Unfit for drinking (E) | Excellent (A) | Excellent (A) | Unfit for drinking (E) |
| Smy | 10.68 | 5.34 | 3.53 | 24.17 | Excellent (A) | Excellent (A) | Excellent (A) | Excellent (A) |
| Wko | 11.48 | 1.79 | 53.84 | 56.80 | Excellent (A) | Excellent (A) | Poor (C) | Poor (C) |