Arkansas County, AR radon potential

EPA places Arkansas 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 11th percentile for radon potential — Arkansas County outranks 11% of every county EPA has rated.

Where Arkansas County sits nationally

Arkansas County, Arkansas is home to about 16,050 people across 992.14 square miles. Population density there runs about 16 people per square mile. Within its own EPA zone, Arkansas County is bigger by population than 33% of the counties that share it. EPA's geology-based Region 6 groups Arkansas County with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Arkansas County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for Arkansas County — EPA's guidance to test every home makes no exception for counties predicted low.

If Arkansas County tests above the action level

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Arkansas's state radon program

For Arkansas County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Arkansas 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 Arkansas County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Arkansas County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.