Assessment of the Pollution Load of Effluents Discharged from Higher Institutions in Ethiopia: The Case of Bahir Dar University Zenzelma Campus

Table 4

The studied heavy metal content of the analyzed wastewater samples.

SP	Cu (mg/L)	Mn (mg/L)	Pb (mg/L)	Cd (mg/L)
Outlet1	0.18 ± 0.00^g	0.005 ± 0.00^c	0.019 ± 0.00^f	0.014 ± 0.00^g
Outlet2	0.66 ± 0.00^d	0.005 ± 0.00^c	0.18 ± 0.00^a	0.196 ± 0.00^a
Outlet3	0.06 ± 0.00^h	ND	0.024 ± 0.00^c	0.081 ± 0.00^e
D1	0.27 ± 0.01^f	0.002 ± 0.00^f	0.019 ± 0.00^f	0.090 ± 0.00^c
D2	1.3 ± 0.00^c	0.004 ± 0.00^d	0.019 ± 0.00^f	0.16 ± 0.00^b
D3	1.75 ± 0.00^a	0.01 ± 0.00^a	0.023 ± 0.00^d	0.089 ± 0.00^d
D4	1.5 ± 0.00^b	0.006 ± 0.00^b	0.02 ± 0.00^e	0.08 ± 0.00^f
U	0.32 ± 0.00^e	0.003 ± 0.00^e	0.026 ± 0.00^b	0.007 ± 0.00^h
Average	0.75 ± 0.13	0.004 ± 0.001	0.041 ± 0.011	0.090 ± 0.013
-value	0.001	0.001	0.001	0.001
ECS	2	0.5	0.01	0.003
WHO	2	0.5	0.01	0.003

ECS: Ethiopian Compulsory Standard; ND: not detected.