Conejos County, CO: EPA's radon zone, explained

Conejos 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 38th percentile for radon potential — Conejos County outranks 38% of every county EPA has rated.

How Conejos County compares

Conejos County, Colorado is home to about 7,549 people across 1,287.426 square miles. Averaged across its land area, Conejos County runs about 6 people per square mile. By population, Conejos County is the 883rd largest of every county sharing its EPA zone — the 14th percentile by population within that zone. EPA's geology-based Region 8 groups Conejos County with 290 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Conejos 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. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Conejos County — testing is the only way to know an individual home's actual level.

Testing and mitigation in Conejos County

For a Conejos 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 Colorado's state radon program

For Conejos County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Conejos 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 Conejos 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. Whatever zone Conejos County carries, the zone explainer covers what it does and doesn't tell you about any one house.