Table 1. Average purification efficacy of reverse osmosis (RO) systems.
Adapted from [9].
| Component | Efficacy (%) |
| Calcium | 97 |
| Fluoride | 95 |
| Magnesium | 96 |
| Phosphate | 95 |
| Sodium | 94 |
| Sulphate | 94 |
| Iron | 95 |
| Zinc | 95 |
| Nitrate | 90 |
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