Table 4.
Heavy metal pollution Index.
| Heavy metal | Mean Value (mg/L) Mi | Permissible limit (mg/L) Si | Desirable limit (mg/L) Ii | K | Unit weightage Wi | Qi | Qi*Wi | HPI |
|---|---|---|---|---|---|---|---|---|
| Nickel | 0.0254 | 0.02 | – | 0.4 | 0.05 | 127 | 6.35 | 248.5 |
| Zinc | 1.3651 | 5 | 15 | 1.005 | 4.975124378 | 136.3 | 678.3532 | |
| Copper | 0.0813 | 0.05 | 1.5 | 1.005 | 0.049751244 | 97.8 | 4.86773 | |
| Chromium | 0.0352 | 0.05 | 1 | 0.05 | 70.4 | 3.52 | ||
| Cadmium | 0.0374 | 0.003 | 1.02 | 0.002941176 | 1246.6 | 3.666667 | ||
| Iron | 6.4672 | 0.3 | 0.99 | 0.303030303 | 2155.7 | 653.2525 | ||
| Lead | 0.0212 | 0.01 | 1 | 0.01 | 212 | 2.12 | ||
| ∑Wi= 5.44 | ∑Wi*Qi= 1352.13 |