Is Kinney County, TX a radon risk area?

EPA's own radon map rates Kinney County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Kinney County ranks higher in radon potential than 2% of rated counties (the 2nd percentile).

Where Kinney County sits nationally

About 3,191 people live in Kinney County, Texas, spread over 1,360.533 square miles. Population density there runs about 2 people per square mile. Rank 976 by population within its EPA zone puts Kinney County at the 5th percentile among zone peers. EPA's geology-based Region 6 groups Kinney County with 502 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

At Zone 3, Kinney 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 Kinney County — EPA's guidance to test every home makes no exception for counties predicted low.

If Kinney County tests above the action level

Nothing about Kinney 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

Kinney County's test kit answers today; a Airthings radon monitor keeps answering for Kinney 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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.