What EPA's radon map says about Eagle County

EPA places Eagle 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. That puts Eagle County in the 55th percentile nationally for radon potential — higher than 55% of the counties EPA has rated.

How Eagle County compares

About 54,330 people live in Eagle County, Colorado, spread over 1,684.47 square miles. Population density there runs about 32 people per square mile. Among counties sharing Eagle County's EPA zone, it outranks 68% of them by population. EPA's geology-based Region 8 groups Eagle County with 290 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Eagle County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Eagle County's Zone 2 prediction lands in the gap between the two. Eagle County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Eagle County

Mitigation cost doesn't depend on Eagle County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Colorado's state radon program

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Eagle County's numbers. Whatever zone Eagle County carries, the zone explainer covers what it does and doesn't tell you about any one house.