What EPA's radon map says about Maury County

EPA's own radon map rates Maury County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Maury County sits at the 94th percentile nationally for radon potential — above 94 of every 100 rated counties.

Maury County by the numbers

About 113,411 people live in Maury County, Tennessee, spread over 613.083 square miles. That works out to roughly 185 people per square mile. Among counties sharing Maury County's EPA zone, it outranks 84% of them by population. EPA's geology-based Region 4 groups Maury County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Maury County

Maury County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Maury County specifically.

Next steps for a home in Maury County

Mitigation cost doesn't depend on Maury 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

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.