Greeley County, KS radon potential
EPA places Greeley County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Greeley County ranks higher in radon potential than 66% of rated counties (the 66th percentile).
Where Greeley County sits nationally
Greeley County, Kansas is home to about 1,152 people across 778.404 square miles. Population density there runs about 1 people per square mile. Within its own EPA zone, Greeley County is bigger by population than 1% of the counties that share it. 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.
If Greeley County tests above the action level
A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.
Find Kansas's state radon program
For Greeley County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Greeley 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 Greeley 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.