| Summary: | The aim of the research was the study of “Oława” smelter impact on surroundings. For this purpose, water, soil and sediments were collected in the vicinity of smelter and subjected to selected ecotoxicological tests. We used duckweed Spirodela polyrhiza and rotifer Brachinious calyciflorus for water from Odra River assessment, ostracod Heterocypris inconqruens for sediment studies. Mocotyledons Triticum aestivum and Avena sativa and dicotyledonous plants Sinapis alba and Lepidium sativum were used to perform soil toxicity tests. The obtained results proved slight sediment toxicity (63% death rate), but no toxicity of water was observed. The toxicity of soil was also recorded as the inhibition of root growth of tested plants species was observed, although in the closest distance from smelter only. The studies proved that only the area in the nearest vicinity of the “Oława” smelter is still contaminated with heavy metals and may pose a serious threat to the environment.
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