Table 5.

The level of heavy metal contents in water samples collected from Holeta and Golli rivers.

Metals (Mg/ L)	Holeta River (Mean ± SD)	Golli River (Mean ± SD)
Pb	0.05 ± 0.019a	0.02 ± 0.02a
Ni	0.19 ± 0 0.15a	0.16 ± 0.12b
Mn	3.8535 ± 3.31a	2.748 ± 2.63a
Fe	204.3200 ± 129.73a	60.1525 ± 37.68b
Co	0.0445 ± 0 0.04a	0.03 ± 0.02a
Cu	0.1053 ± 0.068a	2.4175 ± 0 2.36 a
Zn	0.6050 ± 0.29a	0.9725 ± 0.89 a
Cd	0.003 ± 0.003a	0.01 ± 0.0021 a
Cr	0.1805 ± 0.13a	0.1670 ± 0.15a

NB: the mean values of the same latter were not significantly different (p ≤ 0.05).