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

EPA places Baxter County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. That puts Baxter County in the 54th percentile nationally for radon potential — higher than 54% of the counties EPA has rated.

How Baxter County compares

Baxter County, Arkansas is home to about 43,007 people across 553.929 square miles. Averaged across its land area, Baxter County runs about 78 people per square mile. By population, Baxter County is the 383rd largest of every county sharing its EPA zone — the 63rd percentile by population within that zone. Baxter County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Baxter County

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Baxter County's Zone 2 prediction. Nothing about a Zone 2 label lowers the case for testing in Baxter County — EPA recommends it in every zone, moderate included.

Next steps for a home in Baxter County

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

Where Baxter County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Baxter County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.