Radon gas can dissolve in groundwater and later be released into the air during such normal household activities as showering, dishwashing and doing laundry. In New Hampshire, the migration of radon up from the soil contributes the largest percent of radon found in the average home. The radon contributed from building materials is typically very small. DES recommends that these two predominant pathways should be evaluated and that initial action to reduce radon exposure should target the pathway that contributes the largest percentage to the occupant's exposure. The primary risk pathway from exposure to radon gas is through inhalation of radon laden air in a home.
Studies show that high levels of radon gas in the air increase the risk of developing lung cancer.
An additional health risk is associated with the ingestion of the radon that remains dissolved in the water that you consume. This risk is substantially lower than that associated with inhalation. The air risk is relatively high when compared to other drinking water contaminants. For more health risk information concerning radon you may call 271-4764, or visit the Department of Health and Human Services' Bureau of Radiological Health Radon Program web site . Indoor Air Recommendation.