Heavy Metals and Physicochemical Parameters Evaluation in the Upper Reaches of Bonny River, Niger Delta, Nigeria

The objectives of the study were to determine distribution heavy metal contamination in water, sediments and biota (Callinectes amniciola) upper reaches Bonny Estuary impact on physicochemical characteristics water body. Sampled was from January June 2020. parameters varied slightly across months but within FEPA/WHO (2003) acceptable limits. Furthermore; compared seasonal variations determination Bio-accumulation Factor (BF) C. amnicola with respect sediment. site is a tidal creek that drains into main River channel Niger Delta, Nigeria. sampled locations/stations include Trans-Amadi slaughter Azuabie {N4°81'49.9 E7°04'63.4}, Okpoka Creek Abuloma {N4°78'02.43 E7°06'66.12} Okirika Jetty {N4°73'70.04 E7°09'56.93}. Samples surface swimming crabs collected three different stations which at least 1000 meters apart. results this show concentrations metals (Fe Zn) both higher media than approved limits prescribed by local regulatory authority. Although Cu relatively limit media. There therefore need control anthropogenic activities or around river. This will help prevent effluent solid waste discharges lead increase concentration aquatic environment. Routine monitoring should be encouraged identify major sources introduction river their impacts resources.