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

EPA's own radon map rates Culberson County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Culberson County lands in the 34th percentile for radon potential.

How Culberson County compares

Culberson County, Texas is home to about 2,254 people across 3,812.156 square miles. That works out to roughly 1 people per square mile. By population, Culberson County is the 998th largest of every county sharing its EPA zone — the 3rd percentile by population within that zone. Geologically, Culberson County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

What this actually means for a house in Culberson County

EPA's Zone 2 rating for Culberson County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Middle-of-the-pack doesn't mean risk-free for any one Culberson County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Culberson County

For a Culberson 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 Culberson County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Culberson County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Culberson County's figures come from

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