Is Logan County, WV a radon risk area?

EPA's own radon map rates Logan County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Logan County in the 18th percentile nationally for radon potential — higher than 18% of the counties EPA has rated.

How Logan County compares

About 30,560 people live in Logan County, West Virginia, spread over 452.904 square miles. Population density there runs about 67 people per square mile. Rank 476 by population within its EPA zone puts Logan County at the 54th percentile among zone peers. Logan County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Logan County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Even at Zone 3, Logan 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 Logan County

Nothing about Logan 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

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Logan County's numbers. Whatever zone Logan County carries, the zone explainer covers what it does and doesn't tell you about any one house.