Is Hopkins County, TX a radon risk area?

Hopkins County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Hopkins County ranks higher in radon potential than 20% of rated counties (the 20th percentile).

How Hopkins County compares

About 38,784 people live in Hopkins County, Texas, spread over 767.431 square miles. That works out to roughly 51 people per square mile. Rank 411 by population within its EPA zone puts Hopkins County at the 60th percentile among zone peers. Hopkins County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Hopkins County

Hopkins 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. A Zone 3 rating means Hopkins 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.

If Hopkins County tests above the action level

Nothing about Hopkins 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

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

Hopkins 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.