Content of polyarenes in organogenic soil horizons and in moss Pleurozium schreberi at contaminated sites was 3-5 higher than the background values. The trend of increasing the content of polyarenes with distance from the source by 1 km has been revealed. At increased PAH falling on the tundra communities, bioaccumulation of PAH by Pleurozium schreberi was more intensive and PAH penetrated actively the moss’ membranes. The increasing of heavy PAH content was the main factor determining the intensification of PAH accumulation in mosses. Pleurozium schreberi was found to be more sensitive to changes in the atmosphere than soils and this species is good indicator of contaminations in unstable tundra communities under aerotechnogenic pollutions of different origin.