The investigations were conducted to determine the effect of applied mineral fertilization, treatment with a waste from magnesium phosphate production, and liming on the content of selected macroelements in soil effluents. Among the analysed elements the greatest amounts of nitrogen and calcium were leached from the soils. Applied fertilization and liming significantly increased concentrations of both elements in the soil effluents, but did not cause any significant changes in phos-phorus content. Potassium content in water leaching from the soil of the fertilizer treatments was sig-nificantly higher than this element concentration in water leaching from the non-fertilized soil, irre-spective of applied liming. The greatest amounts of magnesium and sulphur were assessed in soil effluents from the treatments where the waste from magnesium sulphate production was used. On the basis of the obtained results it was found that sulphur supply to the soil with the mineral fertilizer and also with the waste from magnesium sulphate production may significantly increase the concentration of this element in soil effluents. Under conditions of the experiment, nitrogen poses the most serious hazard of water contamination with elements as a result of their infiltration. In surface water assess-ment the content of the other leached elements is of secondary importance.