What EPA's radon map says about Roane County

EPA's own radon map rates Roane County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Roane County sits at the 42nd percentile nationally for radon potential — above 42 of every 100 rated counties.

Roane County by the numbers

About 13,540 people live in Roane County, West Virginia, spread over 483.563 square miles. Population density there runs about 28 people per square mile. Among counties sharing Roane County's EPA zone, it outranks 28% of them by population. Geologically, Roane County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

What this actually means for a house in Roane County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Roane County's Zone 2 prediction lands in the gap between the two. A county-wide moderate average, like Roane County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Roane County

Mitigation cost doesn't depend on Roane 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 West Virginia's state radon program

Roane County's test kit answers today; a Airthings radon monitor keeps answering for Roane 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

Roane County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.