In the course of an atom absorption tests it was established that aquatic organisms and active slime that had been obtained from sewage recycling facilities of Dneprodzerzhinsk town displayed bioabsorptive properties in relation to heavy metals, such as copper, manganese, cobalt, cadmium, lead, zinc and iron. While comparing the capacities of accumulating heavy metals, possessed by the aquatic organisms and active slime, the authors established that Herpobdella octoculata and Asellus aquaticus had higher adsorption potential of mentioned toxical substances than active slime. The test concentrations of heavy metals, established in the paper, have been displayed in the form of pie-charts.