R2 value Regression equation
0.931 EC=0.064 (TH)-1.142
0.903 EC=0.115 (Ca+2)-7.876
0.929 EC=0.029 (Mg+2)+0.082
0.863 EC=0.002 (Na+1)+2.009
0.789 EC=0.014 (SO42-)+4.844
0.929 EC=0.002 (Cl-)+0.246
0.372 Turbidity=0.003 (SO42- )+2.560
0.953 TH=18.27 (Ca+2) – 1041
0.998 TH=4.735 (Mg+2)+194.2
0.974 TH=0.475 (Na+1)+426
0.653 TH=2.055 (SO42-)+1287
0.990 TH=0.320 (Cl-)+235
0.939 Ca+2 =0.245 (Mg+2)+77.69
0.918 Ca+2 =0.024 (Na+1)+89.6
0.651 Ca+2 =0.109 SO42-+130
0.927 Ca+2 =0.016 (Cl-)+80.01
0.974 Mg+2=0.100 (Na+1)+49.27
0.651 Mg+2=0.432 (SO42-)+232
0.992 Mg+2=0.067 (Cl-)+8.49
0.516 Na+1=3.791 (SO42-)+2424
0.962 Na+1=0.657 (Cl-) – 207.9
0.669 SO42-=0.103 (Cl-)+45.69
Table 5: Linear-regression equations to predict water quality variables.