Table 9.

Potential ecological risk index (PERI and RI) values of heavy metals.

Elements	Minimum	Maximum	Mean
As	0.0065	70.9198	14.2749
Cr	0.0048	1.1545	0.3321
Cu	0.0054	1.8301	0.1995
Ni	0.1783	2.9259	0.9142
Pb	0.1128	20.8070	0.8581
Zn	0.0121	0.1908	0.04456
RI	0.357979	72.37594	16.62427