The effect of purified municipal sewage on the content and uptake of sulphur and chlorine by spring rape and sunflower was determined in a two-year pot experiment. The experiment was set up on podzolic soil and peak-muck soil. Biologically purified municipal sewage used in the study came from a municipal biological-mechanical treatment plant, Hajdów, in Lublin. The results obtained indicated that sewage influenced an increase of sulphate sulphur content in plants. However, the influence of sewage on the amount of organic sulphur was more distinct in spring rape than in sunflower. Sewage application of sewage caused an increase of the total sulphur and chlorine content in both plants. The above allows for the conclusion that the components analyzed were significantly eliminated from sewage water. Among the plants tested, spring rape was more suitable for thorough sewage treatment than sunflower.