Pollution evaluation, sources and risk assessment of heavy metals in hand-dug wells from Ejisu-Juaben Municipality, Ghana

Environmental Systems Research

Table 7 Non-carcinogenic risk (hazard quotient, HQ) and overall toxic risk (hazard index, HI) of water from hand-dug wells in Ejisu-Juaben Municipality

Code	HQ						\(\mathop \sum \nolimits {\text{HI }} = {\text{HQ}}\)
Code	Mn	Fe	Cu	Pb	Zn	Cd	\(\mathop \sum \nolimits {\text{HI }} = {\text{HQ}}\)
1	0.0070	0.0054	3.64 × 10⁻⁶	0.1399	0.0009	0.0490	0.2022
2	0.0079	3.5 × 10⁻⁵	0.0009	0.0350	–	0.0245	0.0683
3	0.0175	0.0003	0.0021	0.0420	0.0005	0.0245	0.0869
4	0.0052	0.0008	0.0018	0.0350	0.0004	0.0000	0.0432
5	0.0166	0.0012	0.0021	0.0350	0.0007	–	0.0556
6	0.0061	0.0012	0.0009	0.0490	0.0007	–	0.0579
7	0.0061	0.0036	0.0031	–	0.0009	–	0.0137
8	0.0157	0.0011	0.0040	–	0.0001	–	0.0209
9	0.0114	0.0068	0.0028	0.0595	0.0008	0.0000	0.0813
10	0.0079	0.0015	0.0034	–	0.0001	–	0.0129
11	0.0044	0.0026	0.0049	0.0420	0.0019	0.0000	0.0558
12	0.0175	0.0027	0.0015	–	0.0002	–	0.0219
13	0.0149	0.1149	0.0021	–	–	–	0.1319
14	0.0052	0.0037	0.0043	0.0035	0.0006	0.0000	0.0173
15	0.0061	0.0070	0.0058	0.0595	0.0013	0.0000	0.0797
16	0.0114	0.0020	0.0034	0.0140	0.0003	–	0.0311
17	0.0044	0.0023	0.0046	0.1050	0.0009	0.0000	0.1172
18	0.0166	0.0017	0.0012	0.0525	0.0004	–	0.0724
19	0.0105	0.0016	0.0031	0.0175	0.0006	–	0.0333