What EPA's radon map says about Moore County

Moore County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Moore County sits at the 73rd percentile nationally for radon potential — above 73 of every 100 rated counties.

Where Moore County sits nationally

About 6,773 people live in Moore County, Tennessee, spread over 129.223 square miles. Averaged across its land area, Moore County runs about 52 people per square mile. Among counties sharing Moore County's EPA zone, it outranks 20% of them by population. Geologically, Moore County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Moore County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Moore County will test well under the action level, and EPA's guidance is to test regardless of zone.

Next steps for a home in Moore County

Mitigation cost doesn't depend on Moore County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Tennessee's state radon program

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

Moore 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.