Is Roosevelt County, NM a radon risk area?

Roosevelt County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Nationally that's the 45th percentile for radon potential — Roosevelt County outranks 45% of every county EPA has rated.

Roosevelt County by the numbers

About 18,713 people live in Roosevelt County, New Mexico, spread over 2,446.051 square miles. Population density there runs about 8 people per square mile. Rank 647 by population within its EPA zone puts Roosevelt County at the 37th percentile among zone peers. EPA's geology-based Region 6 groups Roosevelt County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Roosevelt County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Roosevelt County's Zone 2 prediction lands in the gap between the two. A county-wide moderate average, like Roosevelt County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Testing and mitigation in Roosevelt County

Nothing about Roosevelt 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 New Mexico's state radon program

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