Is Valencia County, NM a radon risk area?

EPA places Valencia County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Valencia County sits at the 58th percentile nationally for radon potential — above 58 of every 100 rated counties.

How Valencia County compares

About 80,813 people live in Valencia County, New Mexico, spread over 1,066.717 square miles. Averaged across its land area, Valencia County runs about 76 people per square mile. Rank 237 by population within its EPA zone puts Valencia County at the 77th percentile among zone peers. Valencia 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 Valencia County

Valencia County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Nothing about a Zone 2 label lowers the case for testing in Valencia County — EPA recommends it in every zone, moderate included.

If Valencia County tests above the action level

Nothing about Valencia 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

Valencia County's test kit answers today; a Airthings radon monitor keeps answering for Valencia County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Valencia County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.