Code

Oder of dominance for major ions

WQI

Class

Cation

Anion

GW1

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

110.6

Poor

GW2

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > Cl⁻ + F > ${\text{SO}}_4^2$

41.2

Good

GW3

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

61.1

Good

GW4

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

77.2

Good

GW5

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

110.6

Poor

GW6

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

56.2

Good

GW7

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

62.3

Good

GW8

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > Cl⁻ + F > ${\text{SO}}_4^2$

73.3

Good

GW9

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

50.3

Good

GW10

Ca²⁺ > Na⁺ + K > Mg²⁺

${\text{HCO}}_3^{-}$ + CO₃ > ${\text{SO}}_4^2$ > Cl⁻ + F

38.5

Excellent