Heavy Metal Concentrations in Fish from River Tano in Ghana and the Health Risks Posed to Consumers

Table 6

Carcinogenic risk index for As, Cr, and Cd metals in fish samples.

Fish species	Cd		As		Cr
	EDI	CRI	EDI	CRI	EDI	CRI
Mormyrus rume	0.01	1.5 .510^−2	1.07	4.0 × 10^−1	5.32	2.66
Leptocypris niloticus	0.01	1.5 .510^−2	0.55	2.1 × 10^−1	11.5	5.75
Oreochromis niloticus	N/A	N/A	0.05	1.9 × 10^−2	9.64	4.82
Chrysichthys johnelsi	0.01	1.5 .510^−2	0.77	2.9 .910^−1	11.8	5.9
Clarias gariepinus	0.01	1.5 .510^−2	0.36	1.4 .410^−1	5.75	2.9
Parachanna obscura	0.004	6.0 .010^−3	0.56	2.1 .110^−1	6.39	3.2
Sarotherodon melanotheron	0.004	6.0 .010^−3	0.39	1.5 .510^−1	6.35	3.2
Ctenopoma gariepinus	0.004	6.0 .010^−3	0.93	3.5 .510^−1	14.4	7.1
Sarotherodon galilaeus	N/A	N/A	0.917	3.5 .510^−1	20.8	10.4
Ctenopoma kingsleyae	N/A	N/A	0.906	3.4 .410^−1	18.7	9.35

N/A means not applicable.