Table 7.
Water quality classification for various ranges of hardness.
| Total hardness (mg/L as CaCO3) | Degree of hardness [63] | Percentage of samples (%) |
|---|---|---|
| 0–75 | Soft | 0 |
| 75–150 | Moderately hard | 11 |
| 150–300 | Hard | 15 |
| >300 | Very hard | 74 |
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