What EPA's radon map says about Conway County

EPA places Conway County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Conway County sits at the 14th percentile nationally for radon potential — above 14 of every 100 rated counties.

Conway County by the numbers

About 21,422 people live in Conway County, Arkansas, spread over 551.953 square miles. That works out to roughly 39 people per square mile. Among counties sharing Conway County's EPA zone, it outranks 43% of them by population. Geologically, Conway 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 Conway County

Conway 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 Conway County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Conway County

Mitigation cost doesn't depend on Conway 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

Conway County's test kit answers today; a Airthings radon monitor keeps answering for Conway County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 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. Whatever zone Conway County carries, the zone explainer covers what it does and doesn't tell you about any one house.