| Total hardness (mg CaCO3/L) | Water type | Number of samples | Percentage (%) of samples |
| <75 | Soft | 8 | 8.3 |
| 75 - 150 | Moderately hard | 20 | 20.8 |
| 150 - 300 | Hard | 42 | 43.8 |
| >300 | Very hard | 26 | 27.1 |