Is Lafayette County, AR a radon risk area?

Lafayette 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 4th percentile for radon potential — Lafayette County outranks 4% of every county EPA has rated.

How Lafayette County compares

About 6,015 people live in Lafayette County, Arkansas, spread over 529.472 square miles. Averaged across its land area, Lafayette County runs about 11 people per square mile. Rank 921 by population within its EPA zone puts Lafayette County at the 11th percentile among zone peers. EPA's geology-based Region 6 groups Lafayette County with 502 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

A Zone 3 county like Lafayette County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Even at Zone 3, Lafayette County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Lafayette County

Nothing about Lafayette 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 Arkansas's state radon program

Lafayette County's test kit answers today; a Airthings radon monitor keeps answering for Lafayette 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 Lafayette County carries, the zone explainer covers what it does and doesn't tell you about any one house.