The correlation matrix for both heavy and
trace elements is shown in Table 3. The results
indicated that significant Pearson correlation were
found for Pb with Cr (0.910) and Ni (0.827); Ni
with Cr (0.878), Mg with Ni (0.601) and Ca with
Ni (0.568); Cr with Mg (0.520) and Cr with Ca
(0.510); Ca with Mg (0.970). The strongest
correlation between Ca and Mg, and Ni and Cr
with majority of the elements (Fig. 2) clearly
indicates the melange zone rocks are the major
sources for the contamination of water bodies of
Islampur area, Swat district. Scatter plot in figure
3 also confirm the strong positive correlation of
Ni vs Cr and Ca vs Mg.