What EPA's radon map says about Cedar County

Cedar County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Cedar County sits at the 74th percentile nationally for radon potential — above 74 of every 100 rated counties.

Cedar County by the numbers

About 8,262 people live in Cedar County, Nebraska, spread over 740.189 square miles. That works out to roughly 11 people per square mile. Among counties sharing Cedar County's EPA zone, it outranks 23% of them by population. Cedar County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Cedar 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. Being in Zone 1 raises the odds Cedar County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

Next steps for a home in Cedar County

Mitigation cost doesn't depend on Cedar 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

Cedar County's test kit answers today; a Airthings radon monitor keeps answering for Cedar 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

The methodology guide shows exactly which EPA and Census sources feed Cedar County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.