Table 2.
Classification of heavy metals pollution based on calculated HPI40.
| S.N. | HPI specification | Class of heavy metals pollution |
|---|---|---|
| 1 | < 25 | Excellent |
| 2 | 26–50 | Good |
| 3 | 51–75 | Poor |
| 4 | 76–100 | Very poor |
| 5 | > 100 | Unsuitable for consumption |
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