What EPA's radon map says about Maverick County

Maverick County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Maverick County sits at the 23rd percentile nationally for radon potential — above 23 of every 100 rated counties.

Maverick County by the numbers

About 58,829 people live in Maverick County, Texas, spread over 1,279.481 square miles. Population density there runs about 46 people per square mile. Among counties sharing Maverick County's EPA zone, it outranks 70% of them by population. EPA's geology-based Region 6 groups Maverick County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Maverick County

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

If Maverick County tests above the action level

Mitigation cost doesn't depend on Maverick County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Texas's state radon program

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

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Maverick County carries, the zone explainer covers what it does and doesn't tell you about any one house.