The Virginia Department of Health Radon Program has identified changes to the EPA Radon Risk Map of the state based on the additional radon test results accumulated by Radon Program. Making the update in May 2024, changes include changes to designation for several counties, including:
· Loudoun County should be designated as high risk – not moderate.
· The “low risk” counties along the I-95 corridor that border high risk jurisdictions to their west (ex. Henrico, Hanover, Richmond City, Caroline, King George) should be designated as moderate risk.
Additionally, the Radon Program notes that many homes built in the Williamsburg area at low elevations and/or cut into river valleys have shown high radon test results. See this article for more details: William & Mary radon study, "A new, fine-grained map shows radon-gas risk zones in Williamsburg" by researchers in William & Mary’s Department of Geology. The information about the study is available at https://www.wm.edu/news/stories/2022/a-new,-fine-grained-map-shows-radon-gas-risk-zones-in-williams…
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