Is Lawrence County, OH a radon risk area?

Lawrence 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. That puts Lawrence County in the 56th percentile nationally for radon potential — higher than 56% of the counties EPA has rated.

Lawrence County by the numbers

About 55,829 people live in Lawrence County, Ohio, spread over 453.394 square miles. Population density there runs about 123 people per square mile. Rank 324 by population within its EPA zone puts Lawrence County at the 69th percentile among zone peers. EPA's geology-based Region 5 groups Lawrence County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Lawrence County's Zone 2 prediction lands in the gap between the two. Lawrence County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Lawrence County

Nothing about Lawrence 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

Lawrence County's test kit answers today; a Airthings radon monitor keeps answering for Lawrence 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 Lawrence County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.