What EPA's radon map says about Andrews County

Andrews County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Andrews County ranks higher in radon potential than 12% of rated counties (the 12th percentile).

Andrews County by the numbers

About 18,923 people live in Andrews County, Texas, spread over 1,500.686 square miles. That works out to roughly 13 people per square mile. Among counties sharing Andrews County's EPA zone, it outranks 38% of them by population. EPA's geology-based Region 6 groups Andrews County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Andrews County

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Andrews 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 Andrews County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Andrews County

Mitigation cost doesn't depend on Andrews 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

Andrews County's test kit answers today; a Airthings radon monitor keeps answering for Andrews 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.