Uvalde County, TX: EPA's radon zone, explained

EPA's own radon map rates Uvalde County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Uvalde County ranks higher in radon potential than 16% of rated counties (the 16th percentile).

How Uvalde County compares

Uvalde County, Texas is home to about 25,138 people across 1,551.922 square miles. Population density there runs about 16 people per square mile. By population, Uvalde County is the 544th largest of every county sharing its EPA zone — the 47th percentile by population within that zone. EPA's geology-based Region 6 groups Uvalde County with 502 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Uvalde County's Zone 3 prediction is the low end of the scale. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Uvalde County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Uvalde County

For a Uvalde County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Texas's state radon program

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

Uvalde 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.