Fishes in C. river elicited higher (P<0.05) heavy metals concentrations compare to Fishes in M. pond. The values were all greater than themaximum permissible limit of heavy metal in fish 0.01, 0.05, 1.5, 0.5, 0.01 and 0.3 mg/kg respectively recommended by FAO/WHO except Cr in the control farm which is within the limit. The result of health risk assessment shows that fishes from C. river have a higher risk from the daily intake, health risk index and hazard index with average values greater than one (2.845) and compared to fish in M. pond with average less than one (0.64).The study concludes that water treatment sludge discharge in Chanchagariverhave deleterious effect on fishes and also bioaccumulate heavy metals in the fish. The risk assessment shows that fish in C.River are contaminated with heavy metals and could pose health risk from heavy metalContamination when consume.
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