Is Red River County, TX a radon risk area?

EPA's own radon map rates Red River County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Red River County sits at the 8th percentile nationally for radon potential — above 8 of every 100 rated counties.

How Red River County compares

About 11,696 people live in Red River County, Texas, spread over 1,043.896 square miles. That works out to roughly 11 people per square mile. Rank 778 by population within its EPA zone puts Red River County at the 25th percentile among zone peers. Geologically, Red River 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

At Zone 3, Red River 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. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Red River County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Red River County

Nothing about Red River 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

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

Red River County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Red River County carries, the zone explainer covers what it does and doesn't tell you about any one house.