Table 3 Enrichment factor (EF) and geoaccumulation index (I_geo) of heavy metals in soil samples

S₁

3.74

1.07

3.00

2.08

2.27

S₂

–

1.68

–

1.86

2.15

S₃

0.42

1.15

0.90

1.98

2.27

S₄

− 0.39

1.44

0.53

2.08

1.80

S₅

− 0.07

1.23

− 0.27

1.86

1.83

S₆

0.42

1.23

0.55

2.08

1.89

S₇

2.19

1.30

1.55

2.08

2.37

S₈

1.51

1.37

0.77

2.08

2.37

S₉

1.56

1.23

1.07

2.18

1.89

S₁₀

0.86

0.57

–

1.06

0.83

S₁₁

1.82

0.79

0.50

0.98

1.31

S₁₂

0.86

0.98

− 0.14

0.89

0.95

S₁₃

1.65

1.37

− 0.42

1.60

0.89

S₁₄

–

0.57

–

0.93

0.80

S₁₅

1.07

0.98

0.42

0.91

0.92

S₁₆

–

0.98

–

1.22

0.37

S₁₇

1.31

0.44

0.58

0.79

1.03

S₁₈

–

1.44

–

1.98

2.37

S₁₉

0.70

1.15

− 0.32

1.98

1.89

S₂₀

1.70

1.23

1.34

1.98

1.81

S₂₁

–

1.37

–

1.98

1.89

S₂₂

0.93

1.15

− 0.42

2.18

2.27

S₂₃

1.51

1.30

0.73

2.08

2.03

S₂₄

0.61

1.23

− 0.47

2.36

1.89

S₂₅

1.82

1.37

1.00

1.51

1.89

S₂₆

0.93

1.44

0.86

1.74

0.83

S₂₇

1.00

0.14

0.20

− 0.87

0.70

S₂₈

− 0.07

1.15

− 1.06

1.86

2.03

S₂₉

–

1.37

–

1.86

1.74

S₃₀

1.19

1.23

− 0.42

2.08

2.27

S₃₁

3.05

1.23

0.63

2.18

1.80

Average

–

–

–

–

–