Lancaster County
Lancaster County is classified by the EPA’s 1993 Map of Radon Zones as Zone 3, the lowest risk category. The predicted average indoor radon screening level is below 2 pCi/L. However, elevated radon has been found in homes in all three zones, and the EPA recommends that all homes be tested.
Measured in Virginia Homes
The Virginia Department of Health lists Lancaster County as insufficient data: it has 20 home radon test results from 2016–2024, too few for VDH to report an average. The highest single result was 11.2 pCi/L.
The EPA zone above comes from a 1993 map built mostly from geology and the limited test data available then. VDH’s figures are actual test results reported by radon test kit vendors. VDH cautions that its averages should not be used to predict radon in any single home — the only way to know your home’s level is to test it.
Source: Virginia Department of Health, Office of Radiological Health, Radon Program — Virginia Radon Test Results map · data.
Lancaster County is classified as EPA Radon Zone 3, the lowest risk category, with predicted average indoor levels below 2 pCi/L. It is one of 44 Zone 3 counties in Virginia (32% of the state's 136 counties). While the overall risk is lower, the EPA still recommends testing all homes — elevated radon has been found in homes in every zone across the country. Local geology can vary significantly even within a single county.
Test for radon in Lancaster County
EPA Zone 3 has lower predicted radon potential, but the EPA recommends testing every home regardless — elevated radon has been measured in every zone.
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What This Means for Lancaster County
Should You Test?
The EPA recommends testing all homes, even in Zone 3. While predicted levels are the lowest, elevated radon has been found in homes in every zone. Geology can vary significantly within a county, and individual home construction plays a major role. A simple test kit costs $15–$30.
Real Estate
While this area has the lowest predicted radon levels, it's still good practice to include radon testing in a home inspection, especially for homes with basements or slab-on-grade foundations. A basic test costs $15–$30 and provides peace of mind.
New Construction
While radon-resistant construction is not as critical in Zone 3, the incremental cost ($350–$500) during new construction is modest insurance. At minimum, consider installing a passive radon vent pipe during construction — it can easily be activated with a fan later if testing reveals elevated levels.