Formula

Reference

Total Hardness

TH (CaCO3) mg/L = 2.5 Ca2+ + 4.1 Mg2+

[1]

Water Quality Index

W Q I = i = 1 n W i q i [ i = 1 n W i ] 1

[20]

CAI1

[Cl − (Na + K)]/Cl]

[14] [15] [16]

CAI2

[Cl − (Na + K)]/SO4 + HCO3 + CO3 + NO3]

[14] [15] [16]