Heavy metals

Station 1

(NBRB)

Station 2

(NGRB)

Station 3

(WMRB)

As

0.355

0.020

1.585

Cd

7.000

6.170

9.330

Cr

0.050

0.003

0.218

Pb

6.375

2.875

1.063

Mn

0.194

0.100

0.338

Fe

31.513

29.760

45.523

Cu

9.156

2.641

3.688

Zn

0.142

0.110

0.213