San Miguel County, NM radon potential

EPA's own radon map rates San Miguel County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 84th percentile for radon potential — San Miguel County outranks 84% of every county EPA has rated.

Where San Miguel County sits nationally

San Miguel County, New Mexico is home to about 26,428 people across 4,721.515 square miles. Population density there runs about 6 people per square mile. Within its own EPA zone, San Miguel County is bigger by population than 53% of the counties that share it. EPA's geology-based Region 6 groups San Miguel County with 502 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line San Miguel County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. That doesn't mean every San Miguel County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

If San Miguel County tests above the action level

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

Where San Miguel County's figures come from

San Miguel County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone San Miguel County carries, the zone explainer covers what it does and doesn't tell you about any one house.