Is Macon County, TN a radon risk area?

Macon 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. Nationally that's the 49th percentile for radon potential — Macon County outranks 49% of every county EPA has rated.

Macon County by the numbers

About 27,189 people live in Macon County, Tennessee, spread over 307.144 square miles. Population density there runs about 89 people per square mile. Rank 521 by population within its EPA zone puts Macon County at the 50th percentile among zone peers. EPA's geology-based Region 4 groups Macon County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Macon County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). A county-wide moderate average, like Macon County's, can still hide a specific house well above or below it — testing is what actually answers the question.

If Macon County tests above the action level

Nothing about Macon 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 Tennessee's state radon program

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

More on how this number was built

Macon 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.