Table 3.

Mean levels of metals and metalloids in sediment samples in the study areas.

Sampling Station	Community	As mg/kg		Cd—mg/kg		Pb—mg/kg		Hg—mg/kg
		* Mean (SD	Min–Max	* Mean (SD)	Min–Max	* Mean (SD)	Min–Max	* Mean (SD)	Min–Max
River Anikoko	Brakwaline	0.987 (0.081)	0.871–1.102	0.162 (0.016)	0.139–0.185	0.008 (0.003)	0.004–0.012	0.469 (0.143)	0.267–0.671
River Abodwesh	Himan	0.605 (0.051)	0.532–0.678	0.067 (0.019)	0.041–0.094	0.010 (0.001)	0.008–0.012	0.789 (0.164)	0.557–1.021
River Ankobra	Prestea	0.313 (0.069)	0.215–0.412	0.092 (0.013)	0.073–0.111	0.124 (0.009)	0.11–0.133	0.562 (0.185)	0.301–0.823
River Amenkume	Prestea	0.276 (0.002)	0.273–0.279	0.073 (0.016)	0.051–0.095	0.005 (0.002)	0.002–0.008	0.168 (0.035)	0.118–0.218
River Dinyame	Himan	0.063 (0.004)	0.058–0.068	0.044 (0.006)	0.035–0.053	0.053 (0.013)	0.035–0.071	0.801 (0.057)	0.720–0.882
River Anfoe	Anofe	0.041 (0.004)	0.036–0.046	0.063 (0.022)	0.032–0.094	0.034 (0.008)	0.022–0.046	0.130 (0.014)	0.110–0.150
River Woawora	Dumase	0.032 (0.004)	0.027–0.037	0.053 (0.013)	0.035–0.071	0.023 (0.006)	0.014–0.032	0.231 (0.023)	0.199–0.263
River Benyan	Dumase	0.021(0.002)	0.018–0.024	0.023(0.006)	0.014–0.032	0.042 (0.011)	0.026–0.058	0.140 (0.007)	0.130–0.150
River Mansi	Dumase	0.102 (0.012)	0.085–0.119	0.015 (0.004)	0.009–0.021	0.172 (0.017)	0.148–0.196	0.120 (0.007)	0.110–0.130
GSA—175/WHO [39]	−	27		6		−		−

Notes: * The concentrations reported in this table are the means; SD represents standard deviation.