Is Boone County, NE a radon risk area?

EPA places Boone 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. Rank it against the rest of the country and Boone County lands in the 71st percentile for radon potential.

Boone County by the numbers

About 5,354 people live in Boone County, Nebraska, spread over 686.53 square miles. That works out to roughly 8 people per square mile. Rank 909 by population within its EPA zone puts Boone County at the 15th percentile among zone peers. Geologically, Boone 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

Boone 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. EPA's guidance doesn't change because of a Zone 1 label: test the house. What changes is the reason to not put it off in Boone County specifically.

Testing and mitigation in Boone County

Nothing about Boone County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Nebraska's state radon program

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

More on how this number was built

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