Cd

Cu

Pb

Zn

SQGs

TEC

0.99

31.60

35.80

121.00

PEC

4.98

149.00

128.00

459.00

Values in this study

Mean

3.78

5.74

96.55

157.86

Minimum

0.40

2.11

33.52

1.77

Maximum

9.90

9.70

202.19

891,91

% of samples< TEC

2.78

100

4.17

50.00

% of samples between TEC and PEC

70.83

0

76.39

43.06

% of samples>PEC

26.39

0

19.44

6.94