| N | Canal/Drain | Contamination Index (Cd) | |||
| Short Use | Long Use | ||||
| (Cd) | (Cd) Class | (Cd) | (Cd) Class | ||
| 1 | DA | −7.49 | Safe | 8.06 | High |
| 2 | CD | 7.51 | High | 6.61 | High |
| 3 | DD | −7.26 | Safe | 9.75 | High |
| 4 | DK | 2.80 | Medium | 33.20 | High |
| 5 | DY | −5.67 | Safe | 5.49 | High |