Component

Variables

Strong (>0.75)

Moderate (0.75 - 0.50)

Weak (0.50 - 0.30)

1

EC, TDS, Na⁺, K⁺, Cl⁻, NO₃,

${\text{SO}}_4^{2-}$

2

Pb (mg/L)

NH₄, Turb (NTU), Fe (mg/L)

3

pH, DO (mg/L)

4

Temp (˚C)

5

DO (mg/L)