What EPA's radon map says about Bradley County

EPA's own radon map rates Bradley County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Bradley County ranks higher in radon potential than 7% of rated counties (the 7th percentile).

How Bradley County compares

About 9,935 people live in Bradley County, Arkansas, spread over 649.167 square miles. Averaged across its land area, Bradley County runs about 15 people per square mile. Among counties sharing Bradley County's EPA zone, it outranks 20% of them by population. Bradley 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 Bradley County

Bradley County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 rating means Bradley County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Bradley County

Mitigation cost doesn't depend on Bradley 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

Bradley County's test kit answers today; a Airthings radon monitor keeps answering for Bradley County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.