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Standards, weight, and relative weight for WQI computation.
| Variables | Guidelines | Weight (wi) | Relative weight (wi) |
|---|---|---|---|
| pH | 7.5 | 5 | 0.14 |
| EC | 1000 | 4 | 0.11 |
| TDS | 1500 | 5 | 0.14 |
| Total iron | 0.3 | 3 | 0.08 |
| Fluoride | 1.5 | 5 | 0.14 |
| Calcium | 75 | 3 | 0.08 |
| Chloride | 250 | 3 | 0.08 |
| Magnesium | 30 | 3 | 0.08 |
| Sulfate | 250 | 5 | 0.14 |
