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Table 6 Rotated factor loadings of PCA application for water quality parameters

From: Quality modeling of drinking groundwater using GIS in rural communities, northwest of Iran

Parameters PC1 PC2 PC3
Mg 2+ 0.959 −0.093 −0.096
K + 0.853 0.289 −0.008
HCO 3 0.820 0.411 −0.074
SO 4 2− 0.806 0.425 0.041
Hardness 0.796 0.526 −0.166
EC 0.734 0.673 −0.040
NO 3 2− −0.062 0.884 0.062
Ca 2+ 0.330 0.867 −0.168
Cl 0.371 0.856 −0.017
Na + 0.587 0.722 0.132
F 0.100 −0.049 0.868
pH −0.477 0.049 0.575
Eigenvalue 7.244 1.780 1.092
Variance % 60.366 14.833 9.102
Cumulative % 60.366 75.199 84.301
  1. Numbers in bold indicate effective parameter in each PC.