Is Athens County, OH a radon risk area?

Athens County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Rank it against the rest of the country and Athens County lands in the 57th percentile for radon potential.

Where Athens County sits nationally

About 63,218 people live in Athens County, Ohio, spread over 503.643 square miles. Averaged across its land area, Athens County runs about 126 people per square mile. Rank 294 by population within its EPA zone puts Athens County at the 72nd percentile among zone peers. Geologically, Athens County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

What this actually means for a house in Athens County

Athens County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Middle-of-the-pack doesn't mean risk-free for any one Athens County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Athens County

Nothing about Athens 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 Ohio's state radon program

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

Athens 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.