Radon is odorless and invisible.
Radon gas is the 2nd leading cause of lung cancer and is estimated to cause 14,000 deaths per year, according to the National Safety Council. Radon enters a home through cracks in floors and walls, floor drains, drain systems and sump pits, construction joints, and exposed soil in crawlspaces. Homes with well-water can develop radon concentrations through showering and doing laundry. The EPA, the Surgeon General, the American Lung Association, and the American Medical Association recommend testing for radon gas as a health precaution. Many corporate relocation companies require testing for radon gas prior to home purchase, and require mitigation if the concentration exceeds the acceptable threshold.