Sandoval County, NM radon potential

Sandoval 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 61st percentile for radon potential — Sandoval County outranks 61% of every county EPA has rated.

Where Sandoval County sits nationally

Sandoval County, New Mexico is home to about 157,757 people across 3,710.194 square miles. That works out to roughly 43 people per square mile. Within its own EPA zone, Sandoval County is bigger by population than 86% of the counties that share it. Sandoval County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

EPA's Zone 2 rating for Sandoval County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A county-wide moderate average, like Sandoval County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Testing and mitigation in Sandoval County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find New Mexico's state radon program

For Sandoval County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Sandoval County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Sandoval County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.