Radon Pros in Texas

Last updated: March 2026

Texas includes all three EPA radon zones, with higher-risk pockets scattered across a geologically diverse landscape. North Texas, parts of the Hill Country, and some west Texas regions have Zone 1 and Zone 2 counties with elevated predicted indoor radon potential. The Gulf Coast and many south Texas counties are Zone 3 with lower averages. Texas geology changes rapidly across regions — limestone karst, granitic intrusions, and shale formations create localized conditions where neighboring counties can have very different risk profiles. Texas requires radon professionals to be licensed through the Texas Department of State Health Services radon program, one of the few southern states with a formal licensing framework. In real estate transactions, radon testing is not mandated but is increasingly requested in Dallas-Fort Worth, Austin, and San Antonio markets where awareness is growing. Texas is notable for the disconnect between its large radon-affected population and relatively low testing rates compared to Midwest and Northeast states. The EPA recommends testing all Texas homes with ground contact, particularly in the north and central regions. County-level zone maps are especially useful in Texas because statewide averages obscure the genuine risk in specific metros and rural areas where readings can exceed 10 pCi/L.