What EPA's radon map says about Upshur County

EPA's own radon map rates Upshur County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. That puts Upshur County in the 48th percentile nationally for radon potential — higher than 48% of the counties EPA has rated.

How Upshur County compares

About 23,650 people live in Upshur County, West Virginia, spread over 354.638 square miles. That works out to roughly 67 people per square mile. Among counties sharing Upshur County's EPA zone, it outranks 45% of them by population. Upshur County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Upshur County

EPA's Zone 2 rating for Upshur County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Middle-of-the-pack doesn't mean risk-free for any one Upshur County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Upshur County

Mitigation cost doesn't depend on Upshur 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

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

Upshur County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Upshur County carries, the zone explainer covers what it does and doesn't tell you about any one house.