Is Val Verde County, TX a radon risk area?

Val Verde County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Val Verde County lands in the 22nd percentile for radon potential.

Where Val Verde County sits nationally

About 47,999 people live in Val Verde County, Texas, spread over 3,144.75 square miles. That works out to roughly 15 people per square mile. Rank 354 by population within its EPA zone puts Val Verde County at the 66th percentile among zone peers. EPA's geology-based Region 6 groups Val Verde County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Val Verde County

Val Verde 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. Don't read Zone 3 as a pass for Val Verde County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Val Verde County

Nothing about Val Verde County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Texas's state radon program

Val Verde County's test kit answers today; a Airthings radon monitor keeps answering for Val Verde County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Val Verde County's numbers. Whatever zone Val Verde County carries, the zone explainer covers what it does and doesn't tell you about any one house.