Is Benton County, MS a radon risk area?

Benton County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally that's the 5th percentile for radon potential — Benton County outranks 5% of every county EPA has rated.

Benton County by the numbers

About 7,566 people live in Benton County, Mississippi, spread over 406.616 square miles. That works out to roughly 19 people per square mile. Rank 889 by population within its EPA zone puts Benton County at the 14th percentile among zone peers. Geologically, Benton County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

What this actually means for a house in Benton County

Benton County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 label describes Benton County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Benton County

Nothing about Benton 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 Mississippi'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. Code RADONZONE-10OFF takes 10% off at checkout.

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.