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PCA demonstrated >77% of the variance of the measured variables by its four initial components (PCs) as tabulated in Table 4.

Table 4

Explaining total variance with four main components

PCs	Eigenvalue	% Of Variance	Cumulative %
1	3.400	34.005	34.005
2	1.801	18.014	52.019
3	1.490	14.902	66.920
4	1.034	10.336	77.256

PCs	Eigenvalue	% Of Variance	Cumulative %
1	3.400	34.005	34.005
2	1.801	18.014	52.019
3	1.490	14.902	66.920
4	1.034	10.336	77.256

Table 5

Rotated factor loadings with communality estimates

Parameter	PC1	PC2	PC3	PC4	Communalities
Turbidity	−0.027	−0.091	*0.894*	0.054	0.794
Color	0.081	0.087	*0.881*	−0.046	0.801
pH	−0.247	*0.790*	0.105	−0.087	0.658
Cl⁻	*0.960*	−0.205	0.013	−0.131	0.897
Total hardness	*0.844*	0.187	0.056	0.149	0.874
Total alkalinity	0.484	0.536	0.030	0.240	0.750
TDS	*0.971*	0.030	−0.018	−0.016	0.946
NO₃⁻	−0.189	0.083	0.007	*0.847*	0.721
No₂⁻	0.135	−0.135	0.003	*0.830*	0.716
F⁻	0.221	0.680	−0.100	0.061	0.569

Parameter	PC1	PC2	PC3	PC4	Communalities
Turbidity	−0.027	−0.091	*0.894*	0.054	0.794
Color	0.081	0.087	*0.881*	−0.046	0.801
pH	−0.247	*0.790*	0.105	−0.087	0.658
Cl⁻	*0.960*	−0.205	0.013	−0.131	0.897
Total hardness	*0.844*	0.187	0.056	0.149	0.874
Total alkalinity	0.484	0.536	0.030	0.240	0.750
TDS	*0.971*	0.030	−0.018	−0.016	0.946
NO₃⁻	−0.189	0.083	0.007	*0.847*	0.721
No₂⁻	0.135	−0.135	0.003	*0.830*	0.716
F⁻	0.221	0.680	−0.100	0.061	0.569

Note: Parameter loadings greater than 0.75 are indicated in bold italics and parameter loadings between 0.5 and 0.75 are indicated in bold values.