Yell County, AR: EPA's radon zone, explained

EPA places Yell 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. Nationally that's the 13th percentile for radon potential — Yell County outranks 13% of every county EPA has rated.

How Yell County compares

Yell County, Arkansas is home to about 20,134 people across 930.386 square miles. Averaged across its land area, Yell County runs about 22 people per square mile. By population, Yell County is the 614th largest of every county sharing its EPA zone — the 40th percentile by population within that zone. Geologically, Yell 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 Yell County

A Zone 3 county like Yell County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Yell County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Yell County

For a Yell County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Arkansas's state radon program

For Yell County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Yell County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Yell County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.