Wirt County, WV radon potential

EPA's own radon map rates Wirt County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Wirt County ranks higher in radon potential than 36% of rated counties (the 36th percentile).

How Wirt County compares

Wirt County, West Virginia is home to about 4,924 people across 232.511 square miles. That works out to roughly 21 people per square mile. Within its own EPA zone, Wirt County is bigger by population than 8% of the counties that share it. Geologically, Wirt County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

Zone vs. an actual test

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Wirt County's Zone 2 prediction. Middle-of-the-pack doesn't mean risk-free for any one Wirt County address — a moderate county average still leaves individual homes to test either side of it.

If Wirt County tests above the action level

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find West Virginia's state radon program

For Wirt County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Wirt County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Wirt County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.