What EPA's radon map says about Jackson County

EPA places Jackson 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. That puts Jackson County in the 11th percentile nationally for radon potential — higher than 11% of the counties EPA has rated.

Jackson County by the numbers

About 16,673 people live in Jackson County, Arkansas, spread over 633.611 square miles. Population density there runs about 26 people per square mile. Among counties sharing Jackson County's EPA zone, it outranks 34% of them by population. Jackson 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 Jackson County

At Zone 3, Jackson 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. Don't read Zone 3 as a pass for Jackson County — EPA's guidance to test every home makes no exception for counties predicted low.

If Jackson County tests above the action level

Mitigation cost doesn't depend on Jackson 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

Jackson County's test kit answers today; a Airthings radon monitor keeps answering for Jackson 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.