What EPA's radon map says about Newton County

Newton County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Newton County ranks higher in radon potential than 4% of rated counties (the 4th percentile).

Newton County by the numbers

About 7,026 people live in Newton County, Arkansas, spread over 821.076 square miles. That works out to roughly 9 people per square mile. Among counties sharing Newton County's EPA zone, it outranks 13% of them by population. Geologically, Newton County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

What this actually means for a house in Newton County

Newton County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 rating means Newton County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Newton County

Mitigation cost doesn't depend on Newton 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 Arkansas's state radon program

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

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