Matrix

statistic Parameters

Hg

Pb

Cd

As

Fe

well

Boreholes

Min

0.41

0.05

0.00

0.00

775.19*

Max

4.63

6.56

0.18

5.64

3551.46*

Aveg

1.67

3.10

0.08

0.60

2233.48*

Ecart-type

0.88

1.75

0.04

1.18

629.89

Cv (%)

52.69

56.50

48.30

198.15

28.20

Min

0.55

0.12

0.00

0.14

1167.06*

Max

3.70

9.31

0.17

8.67

3944.44*

Aveg

1.76

4.08

0.08

1.27

2427.94*

Ecart-type

0.95

0.91

0.04

2.36

628.88

Cv (%)

58.89

22.36

52.67

185.85

25.90

(WHO, 2017)

6

10

3

10

300