Stonewall County, TX radon potential

Stonewall County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Stonewall County ranks higher in radon potential than 1% of rated counties (the 1st percentile).

Where Stonewall County sits nationally

Stonewall County, Texas is home to about 1,235 people across 916.313 square miles. That works out to roughly 1 people per square mile. Within its own EPA zone, Stonewall County is bigger by population than 2% of the counties that share it. Stonewall County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Stonewall 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. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Stonewall County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Stonewall 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 Texas's state radon program

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

Where Stonewall County's figures come from

Stonewall County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.