20251015 13384800 1.0 TRUE Radon Potential Areas This data contains polygon features representing areas of radon potential within Fairfax County. These areas were developed by short-term test results from a study conducted by the Fairfax County Health Department during the winters of 1986-87 and 1987-88. For more information go to http://www.fairfaxcounty.gov/hd/air/radon.htm