What EPA's radon map says about Scott County

EPA's own radon map rates Scott County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Scott County sits at the 82nd percentile nationally for radon potential — above 82 of every 100 rated counties.

Where Scott County sits nationally

About 21,388 people live in Scott County, Virginia, spread over 535.827 square miles. That works out to roughly 40 people per square mile. Among counties sharing Scott County's EPA zone, it outranks 48% of them by population. EPA's geology-based Region 3 groups Scott County with 244 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Scott County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Scott County will test well under the action level, and EPA's guidance is to test regardless of zone.

Testing and mitigation in Scott County

Mitigation cost doesn't depend on Scott County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Virginia's state radon program

Scott County's test kit answers today; a Airthings radon monitor keeps answering for Scott County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Scott County carries, the zone explainer covers what it does and doesn't tell you about any one house.