The growing requirements of environmental protection make it necessary to assess the contamination of soils affected by waste sites causing nuisance to the environment. Studies carried out in the immediate vicinity of an oil industry waste site in Jasło-Niegłowice in the Podkarpacie province revealed that the soils had an alkaline reaction, a high concentration of organic carbon and low levels of nitrogen, nitrates and chlorides. The accumulation of the elements studies was not high: the permissible limits were exceeded the most for zinc, nickel and cadmium. Elevated levels of Cr, Pb, Cd, Co, Zn, Cu, Fe and As were found in the arable layer, and of Ni – in the sub-arable layer. The microbiological condition of the agricultural topsoil around the waste site can be considered safe from the sanitary point of view.

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