What EPA's radon map says about Frontier County

Frontier 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 Frontier County lands in the 68th percentile for radon potential.

How Frontier County compares

About 2,536 people live in Frontier County, Nebraska, spread over 974.655 square miles. Averaged across its land area, Frontier County runs about 3 people per square mile. Among counties sharing Frontier County's EPA zone, it outranks 6% of them by population. Frontier County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Frontier County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Frontier County will test well under the action level, and EPA's guidance is to test regardless of zone.

Next steps for a home in Frontier County

Mitigation cost doesn't depend on Frontier 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

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

Frontier County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.