Is Carson County, TX a radon risk area?

EPA's own radon map rates Carson County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Carson County ranks higher in radon potential than 36% of rated counties (the 36th percentile).

Where Carson County sits nationally

About 5,822 people live in Carson County, Texas, spread over 920.235 square miles. That works out to roughly 6 people per square mile. Rank 925 by population within its EPA zone puts Carson County at the 10th percentile among zone peers. Geologically, Carson County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Carson County's Zone 2 prediction. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Carson County — testing is the only way to know an individual home's actual level.

If Carson County tests above the action level

Nothing about Carson 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

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

More on how this number was built

Carson County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.