| Formula | Reference |
Total Hardness | TH (CaCO3) mg/L = 2.5 Ca2+ + 4.1 Mg2+ | [1] |
Water Quality Index |
| [20] |
CAI1 | [Cl − (Na + K)]/Cl] | [14] [15] [16] |
CAI2 | [Cl − (Na + K)]/SO4 + HCO3 + CO3 + NO3] | [14] [15] [16] |