The evaluation of degree of soil pollution the Lower Don and the Azov Sea region by nickel (Ni). Given the main geochemical characteristics of the item, its impact on human health at concentrations exceeding the MAC. Considered the main sources of Ni in the geological environment of the Rostov-on-Don city; analyzed migration routes. Allocated and described lithogeochemical anomalies with the contents of the element 1 to 3.5 MAC. Calculated basic geochemical criteria, according to which the identified categories by degree of soil pollution.
Keywords: heavy metals, migration, dispersed rocks, soils, concentration, technogenic sources, waste water, pollution, lithochemical anomaly.