What EPA's radon map says about Cuming County

Cuming 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 Cuming County lands in the 75th percentile for radon potential.

Where Cuming County sits nationally

About 8,952 people live in Cuming County, Nebraska, spread over 570.49 square miles. Population density there runs about 16 people per square mile. Among counties sharing Cuming County's EPA zone, it outranks 25% of them by population. EPA's geology-based Region 7 groups Cuming County with 411 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Cuming County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. That doesn't mean every Cuming 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 Cuming County tests above the action level

Mitigation cost doesn't depend on Cuming 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

Cuming County's test kit answers today; a Airthings radon monitor keeps answering for Cuming 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 Cuming County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.