Is Desha County, AR a radon risk area?

EPA places Desha 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. Rank it against the rest of the country and Desha County lands in the 7th percentile for radon potential.

Where Desha County sits nationally

About 10,321 people live in Desha County, Arkansas, spread over 741.227 square miles. Population density there runs about 14 people per square mile. Rank 812 by population within its EPA zone puts Desha County at the 21st percentile among zone peers. EPA's geology-based Region 6 groups Desha County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Desha County

At Zone 3, Desha County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Even at Zone 3, Desha 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 Desha County

Nothing about Desha 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

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.