Month

Zinc (Zn)

Copper (Cu)

Chromium (Cr)

January

13.8 ± 2.35

16.5 ± 3.11

24.1 ± 3.89

February

19.7 ± 1.51

16.54 ± 2.17

18.74 ± 4.21

March

Below detection limit

2.1 ± 1.87

7.24 ± 1.69

April

5.46 ± 1.47

11.1 ± 5.60

19.7 ± 3.32