What EPA's radon map says about Greeley County

EPA's own radon map rates Greeley County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. That puts Greeley County in the 67th percentile nationally for radon potential — higher than 67% of the counties EPA has rated.

Where Greeley County sits nationally

About 2,197 people live in Greeley County, Nebraska, spread over 569.826 square miles. Averaged across its land area, Greeley County runs about 4 people per square mile. Among counties sharing Greeley County's EPA zone, it outranks 4% of them by population. Geologically, Greeley County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Where the national indoor average runs about 1.3 pCi/L, Greeley County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. That doesn't mean every Greeley 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.

Testing and mitigation in Greeley County

Mitigation cost doesn't depend on Greeley 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 Nebraska's state radon program

Greeley County's test kit answers today; a Airthings radon monitor keeps answering for Greeley County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.