PCA was used to examine the root of each water quality
parameter due to nature and anthropogenic activities based
on three cluster regions. Eight varimax factors (VFs)
accounted for 76.45% of the total variance in the data set
were found. The largest source of variation (26.29%) appears
to be from water quality parameters associated natural
process (dissolution of rocks), point source pollution
(industrial and municipal waste water) and non-point source
pollution (mostly from agricultural activities). It is
noteworthy that PCA confirm exactly the result of CA and
determine the pollution source.