Is Milam County, TX a radon risk area?

Milam County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Milam County lands in the 16th percentile for radon potential.

How Milam County compares

About 26,159 people live in Milam County, Texas, spread over 1,016.356 square miles. That works out to roughly 26 people per square mile. Rank 526 by population within its EPA zone puts Milam County at the 49th percentile among zone peers. EPA's geology-based Region 6 groups Milam County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Milam County

A Zone 3 county like Milam County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 rating means Milam County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Next steps for a home in Milam County

Nothing about Milam 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

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