Variable

April

May

June

Overall Mean

Range

Zn (ppm)

12.36 ± 12.36^a

9.10 ± 9.10^b

6.42 ± 6.42^c

7.90 ± 2.59

6.42 - 12.36

Cr (ppm)

2.01 ± 2.01^a

1.72 ± 1.72^b

1.57 ± 1.57^c

1.94 ± 0.81

1.57 - 2.01

Pb (ppm)

2.91 ± 2.91^a

2.34 ± 2.34^b

2.61 ± 2.61^c

2.23 ± 0.61

2.34 - 2.91

Fe (ppm)

96.49 ± 96.49^a

89.42 ± 89.42^b

90.07 ± 90.07^c

87.43 ± 6.57

89.42 - 96.49