What EPA's radon map says about Elbert County

EPA's own radon map rates Elbert County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Rank it against the rest of the country and Elbert County lands in the 85th percentile for radon potential.

How Elbert County compares

About 29,382 people live in Elbert County, Colorado, spread over 1,850.086 square miles. Averaged across its land area, Elbert County runs about 16 people per square mile. Among counties sharing Elbert County's EPA zone, it outranks 56% of them by population. Geologically, Elbert County is grouped into EPA Region 8 alongside 290 other counties that share its rock and soil setting.

Zone vs. an actual test

Elbert County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. That doesn't mean every Elbert 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.

Next steps for a home in Elbert County

Mitigation cost doesn't depend on Elbert 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

Elbert County's test kit answers today; a Airthings radon monitor keeps answering for Elbert 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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.