EN
This paper summarizes measurements of the radioactivity of soil and plant samples from the part of the Łęczna-Włodawa lake district, which is under a re-naturalization project, in Lublin and Chełm provinces (Eastern Poland). The aim of the studies was to determine the concentrations of particular radionuclides in the soils and plants of this district. The total radioactivity is reported as well as the contribution of artificial radionuclides (Cs-134, C-137) whose presence is due to radioactive fall-out. The total radioactivity of the soil samples ranges from 100-900 Bq/kg, and that of plant samples from 100—1300 Bq/kg. Contamination by radiocesium depends on the migration of water.