SITES/

HMs

AB

AG

AQ

AP

BZ

BB

FI

HL

JQ

KA

NB1

NB2

OG

AW

WA

WL

Geoaccumulation index

As

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Cd

0.76

0.74

0.46

0.90

0.00

0.42

0.74

1.30

0.66

1.10

0.71

0.76

0.42

1.19

1.31

1.36

Cr

0.15

1.17

0.15

0.45

−0.35

0.21

0.35

0.60

0.04

0.42

0.60

0.41

0.13

0.69

0.69

0.53

Hg

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Pb

−0.09

−0.09

−0.27

0.23

−0.36

0.83

−0.09

0.37

−0.07

0.37

0.17

0.35

−0.32

0.46

0.42

−0.46

Mean

0.16

−0.104

0.07

0.33

−0.14

0.29

0.20

0.45

0.13

0.34

0.29

0.30

0.05

0.47

0.48

0.29

Enrichment factor

As

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Cd

3.60

3.50

2.60

4.61

1.00

2.50

3.50

6.52

3.50

5.40

4.90

3.60

2.50

6.00

6.90

7.40

Cr

1.80

1.31

1.80

2.51

1.00

1.92

2.23

2.90

1.60

2.60

3.00

2.41

1.74

3.33

3.33

2.80

Hg

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Pb

1.32

1.52

1.10

1.90

1.01

1.63

1.52

2.30

1.40

2.31

1.83

2.30

1.05

2.54

2.44

2.54

Mean

5.70

5.10

4.60

7.49

2.20

4.72

6.03

9.80

5.40

8.46

8.30

6.50

4.50

9.80

10.68

10.71