Is Anderson County, TX a radon risk area?

Anderson County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Anderson County sits at the 23rd percentile nationally for radon potential — above 23 of every 100 rated counties.

How Anderson County compares

About 59,512 people live in Anderson County, Texas, spread over 1,062.617 square miles. Population density there runs about 56 people per square mile. Rank 304 by population within its EPA zone puts Anderson County at the 71st percentile among zone peers. Geologically, Anderson 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

Anderson County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for Anderson County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Anderson County

Nothing about Anderson 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

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

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