Knox County, NE radon potential

EPA's own radon map rates Knox County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Knox County sits at the 74th percentile nationally for radon potential — above 74 of every 100 rated counties.

Knox County by the numbers

Knox County, Nebraska is home to about 8,306 people across 1,108.235 square miles. That works out to roughly 7 people per square mile. Within its own EPA zone, Knox County is bigger by population than 24% of the counties that share it. Geologically, Knox County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Zone vs. an actual test

Knox 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 Knox 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.

Testing and mitigation in Knox County

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 Nebraska's state radon program

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

Where Knox County's figures come from

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