Quay County, NM: EPA's radon zone, explained

Quay 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 39th percentile for radon potential — Quay County outranks 39% of every county EPA has rated.

How Quay County compares

Quay County, New Mexico is home to about 8,403 people across 2,873.955 square miles. That works out to roughly 3 people per square mile. By population, Quay County is the 859th largest of every county sharing its EPA zone — the 17th percentile by population within that zone. Geologically, Quay County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Quay County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Nothing about a Zone 2 label lowers the case for testing in Quay County — EPA recommends it in every zone, moderate included.

Testing and mitigation in Quay County

For a Quay County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find New Mexico's state radon program

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

Where Quay County's figures come from

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