[en] Radon is one of natural pollutants that threatens the environment. It is a breakdown product of uranium and decays automatically to other radioactive elements that stick to atoms of dust in the air. When it is inhaled by human sticks to the wall of the lungs and in turn, degradation to other elements, during this decomposition radiates alpha particles which are ionizing radiations cause ionization of leveling cells and this lead chemical changes in which may hand to one of two things, either permanent changes in the cells and thus a genetic defect of a cancerous disease. The research aims to: Determination of concentrations and doses of radiation exposure to radon gas in regions collected from soil and air waste of province. Explain and link the results with higher raters of cancer of various diseases. Used in this study, the use of soil state nuclear track detectors in environmental studies has been focusing on the type of detector (CR-39) and that the characteristic features of this reagent and bear the climatic conditions. It was found the highest radon concentration in the air in Kut-spend Essaouira - the mechanics and the devastating (85.440 Bq/m³) with exposure dose (32.266 x 10^-8Sv). either in the soil for the same areas of the city of kut, the highest concentration found in the district of Essaouira -a devastating and hoses was (242.903 Bq/m³) with the dose of exposure (91.734 x 10^-8Sv). (Author)