What EPA's radon map says about Mitchell County

EPA places Mitchell 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 that's the 6th percentile for radon potential — Mitchell County outranks 6% of every county EPA has rated.

Where Mitchell County sits nationally

About 8,968 people live in Mitchell County, Texas, spread over 911.093 square miles. Population density there runs about 10 people per square mile. Among counties sharing Mitchell County's EPA zone, it outranks 18% of them by population. Geologically, Mitchell 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

Mitchell 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. Even at Zone 3, Mitchell County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Mitchell County

Mitigation cost doesn't depend on Mitchell County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Texas's state radon program

Mitchell County's test kit answers today; a Airthings radon monitor keeps answering for Mitchell 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 Mitchell County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.