What are the primary routes of exposure of radon to humans?
Evidence suggests that the primary route of exposure of radon to humans is through the respiration of radon gas. A secondary route of exposure is through radon contaminated drinking water. The primary source of human exposure to radon is breathing radon in indoor air of homes; radon can enter indoor air from soil under foundations. (4) Most of the risk involved with radon in drinking water(nearly 90%) comes from breathing radon released into the air from household water sources. (4) Ingestion of high levels of radon in drinking water is also believed to pose a risk too, although it poses a lesser risk than inhalation. (5) Further evidence from the Physicians Guide on RADON states ” if inhaled, radon decay products unattached or attached to the surface of aerosols, dusts, and smoke particles become deeply lodged or trapped in the lungs where they can radiate and penetrate the cells of mucous membranes, bronchi, and other pulmonary tissues.” (1) Radon comes from within earth and is a by
