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Table 5

Principal component analysis (PCA) for source identification

123
Drinking water 
Total variance (%) 56.69 26.52 16.78 
pH −0.8869 0.0266 0.4612 
Temp 0.9235 0.2283 0.3082 
Turbidity −0.1329 0.9263 −0.3526 
Coliform 0.9822 0.1763 −0.0653 
Fecal coliform 0.4198 0.6402 −0.6434 
Total hardness −0.9146 −0.1085 0.3897 
Ca+2 hardness −0.1594 0.0075 0.9872 
Mg+2 hardness −0.4432 −0.0836 −0.8925 
Alkalinity −0.8350 −0.4251 0.3495 
TS 0.9853 0.0071 0.1707 
TDS 0.9847 0.0040 0.1744 
TSeS 0.8506 0.2463 0.4646 
Chlorides −0.1329 0.9263 −0.3526 
Ni −0.1262 −0.4530 0.8825 
Zn −0.9709 −0.1987 0.1338 
Cd 0.5560 0.7896 0.2596 
Cr 0.3112 0.8870 0.3411 
Pb −0.6197 −0.7848 −0.0027 
Wastewater 
Total variance (%) 63.76 25.32 10.9 
pH −0.899 0.104 0.426 
Temp 0.938 0.312 −0.154 
BOD 0.596 0.788 0.155 
COD −0.280 0.078 0.957 
TKN −0.114 0.107 0.988 
Total hardness 0.974 0.167 −0.153 
Ca+2 hardness 0.949 0.119 −0.293 
Mg+2 hardness 0.979 0.201 −0.043 
Alkalinity 0.464 0.147 −0.874 
TS 0.069 0.997 0.034 
TDS 0.069 0.997 0.027 
TSeS 0.070 0.997 0.034 
Chlorides 0.902 0.295 −0.316 
Ni 0.930 0.297 −0.216 
Cd 0.912 −0.016 −0.410 
Cr −0.903 0.251 0.349 
Pb −0.658 0.207 0.724 
123
Drinking water 
Total variance (%) 56.69 26.52 16.78 
pH −0.8869 0.0266 0.4612 
Temp 0.9235 0.2283 0.3082 
Turbidity −0.1329 0.9263 −0.3526 
Coliform 0.9822 0.1763 −0.0653 
Fecal coliform 0.4198 0.6402 −0.6434 
Total hardness −0.9146 −0.1085 0.3897 
Ca+2 hardness −0.1594 0.0075 0.9872 
Mg+2 hardness −0.4432 −0.0836 −0.8925 
Alkalinity −0.8350 −0.4251 0.3495 
TS 0.9853 0.0071 0.1707 
TDS 0.9847 0.0040 0.1744 
TSeS 0.8506 0.2463 0.4646 
Chlorides −0.1329 0.9263 −0.3526 
Ni −0.1262 −0.4530 0.8825 
Zn −0.9709 −0.1987 0.1338 
Cd 0.5560 0.7896 0.2596 
Cr 0.3112 0.8870 0.3411 
Pb −0.6197 −0.7848 −0.0027 
Wastewater 
Total variance (%) 63.76 25.32 10.9 
pH −0.899 0.104 0.426 
Temp 0.938 0.312 −0.154 
BOD 0.596 0.788 0.155 
COD −0.280 0.078 0.957 
TKN −0.114 0.107 0.988 
Total hardness 0.974 0.167 −0.153 
Ca+2 hardness 0.949 0.119 −0.293 
Mg+2 hardness 0.979 0.201 −0.043 
Alkalinity 0.464 0.147 −0.874 
TS 0.069 0.997 0.034 
TDS 0.069 0.997 0.027 
TSeS 0.070 0.997 0.034 
Chlorides 0.902 0.295 −0.316 
Ni 0.930 0.297 −0.216 
Cd 0.912 −0.016 −0.410 
Cr −0.903 0.251 0.349 
Pb −0.658 0.207 0.724 
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