Hamilton County, NE: EPA's radon zone, explained

Hamilton County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Rank it against the rest of the country and Hamilton County lands in the 75th percentile for radon potential.

How Hamilton County compares

Hamilton County, Nebraska is home to about 9,564 people across 542.03 square miles. Averaged across its land area, Hamilton County runs about 18 people per square mile. By population, Hamilton County is the 776th largest of every county sharing its EPA zone — the 27th percentile by population within that zone. EPA's geology-based Region 7 groups Hamilton County with 411 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Hamilton 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. Some Hamilton County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Next steps for a home in Hamilton County

For a Hamilton County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Nebraska's state radon program

For Hamilton County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Hamilton County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Hamilton County's figures come from

Hamilton County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.