Zavala County, TX radon potential

EPA places Zavala 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. Zavala County sits at the 6th percentile nationally for radon potential — above 6 of every 100 rated counties.

How Zavala County compares

Zavala County, Texas is home to about 9,209 people across 1,297.407 square miles. That works out to roughly 7 people per square mile. Within its own EPA zone, Zavala County is bigger by population than 18% of the counties that share it. EPA's geology-based Region 6 groups Zavala County with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

A Zone 3 county like Zavala County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 label describes Zavala County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Zavala 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 Texas's state radon program

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

Where Zavala County's figures come from

Zavala 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.