Ouachita County, AR radon potential

Ouachita County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Ouachita County sits at the 14th percentile nationally for radon potential — above 14 of every 100 rated counties.

Ouachita County by the numbers

Ouachita County, Arkansas is home to about 21,684 people across 732.721 square miles. Population density there runs about 30 people per square mile. Within its own EPA zone, Ouachita County is bigger by population than 43% of the counties that share it. EPA's geology-based Region 6 groups Ouachita County with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Ouachita 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 label describes Ouachita County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Ouachita County

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

Where Ouachita County's figures come from

Ouachita County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.