What EPA's radon map says about Benton County

EPA's own radon map rates Benton County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Benton County sits at the 44th percentile nationally for radon potential — above 44 of every 100 rated counties.

Benton County by the numbers

About 16,173 people live in Benton County, Tennessee, spread over 394.306 square miles. Population density there runs about 41 people per square mile. Among counties sharing Benton County's EPA zone, it outranks 33% of them by population. EPA's geology-based Region 4 groups Benton County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Benton 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. Nothing about a Zone 2 label lowers the case for testing in Benton County — EPA recommends it in every zone, moderate included.

Next steps for a home in Benton County

Mitigation cost doesn't depend on Benton 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

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

Benton County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Benton County carries, the zone explainer covers what it does and doesn't tell you about any one house.