Co

Cd

Lead

Reference

Country

ND

ND

ND

[18]

Ethiopia

0.002

0.068

0.040

[2]

Egypt

NR

0.163

0.550

[3]

Kano (Nigeria)

NR

0.099

0.710

[3]

Zaria (Nigeria)

NR

1.24

3.43

[19]

Libya

0.020

ND

0.263

This study

Zanzibar