El Paso County, TX radon potential

El Paso County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. El Paso County sits at the 32nd percentile nationally for radon potential — above 32 of every 100 rated counties.

Where El Paso County sits nationally

El Paso County, Texas is home to about 875,784 people across 1,013.525 square miles. That works out to roughly 864 people per square mile. Within its own EPA zone, El Paso County is bigger by population than 97% of the counties that share it. EPA's geology-based Region 6 groups El Paso County with 502 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

At Zone 3, El Paso 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. A Zone 3 rating means El Paso 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.

Next steps for a home in El Paso 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 El Paso County, an ongoing number beats a one-time test - a Airthings radon monitor tracks El Paso 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 El Paso County's figures come from

El Paso County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone El Paso County carries, the zone explainer covers what it does and doesn't tell you about any one house.