Is Kleberg County, TX a radon risk area?

EPA places Kleberg County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Kleberg County ranks higher in radon potential than 18% of rated counties (the 18th percentile).

Kleberg County by the numbers

About 30,442 people live in Kleberg County, Texas, spread over 881.306 square miles. That works out to roughly 35 people per square mile. Rank 477 by population within its EPA zone puts Kleberg County at the 54th percentile among zone peers. Geologically, Kleberg County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Zone vs. an actual test

Kleberg County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. Don't read Zone 3 as a pass for Kleberg County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Kleberg County

Nothing about Kleberg 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

Kleberg County's test kit answers today; a Airthings radon monitor keeps answering for Kleberg 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. Whatever zone Kleberg County carries, the zone explainer covers what it does and doesn't tell you about any one house.