Is Boone County, WV a radon risk area?

Boone County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally that's the 14th percentile for radon potential — Boone County outranks 14% of every county EPA has rated.

Boone County by the numbers

About 20,496 people live in Boone County, West Virginia, spread over 502.37 square miles. Averaged across its land area, Boone County runs about 41 people per square mile. Rank 605 by population within its EPA zone puts Boone County at the 41st percentile among zone peers. Boone 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 Boone County

At Zone 3, Boone County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Even at Zone 3, Boone County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Testing and mitigation in Boone County

Nothing about Boone County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find West Virginia's state radon program

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Boone County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.