Radon gas cannot be seen, smelled or tasted, but it may be a health hazard in your home.

Exposure to radon may cause as many as 21,000 cases of lung cancer each year in the United States, including almost 700 cases per year in Virginia. Testing your home, workplace or other normally occupied area is the only way to know for sure if an indoor radon problem exists.

More Resources from VDH

Radon Potential Map

Fairfax County radon potential map The Radon Potential of Rocks and Soil in Fairfax County, Virginia, Button, James K, et al., 1988. Short-term test results from a study conducted by the Fairfax County Health Department during the winters of 1986-87 and 1987-88 found that radon levels above the EPA action level of 4 picoCuries per liter of air can occur anywhere in the areas shown on the Fairfax County Radon Potential Map. In the areas of LOW potential (yellow), 14 percent of the homes tested had radon levels that were a problem. At the other end of the radon range, 56 percent of the homes tested in the areas of HIGH potential (red) did not have problem radon levels. The Radon Potential Map provides a general description of radon within Fairfax County.

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