What EPA's radon map says about Nuckolls County

EPA places Nuckolls County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 70th percentile for radon potential — Nuckolls County outranks 70% of every county EPA has rated.

How Nuckolls County compares

About 4,094 people live in Nuckolls County, Nebraska, spread over 575.155 square miles. Population density there runs about 7 people per square mile. Among counties sharing Nuckolls County's EPA zone, it outranks 11% of them by population. Geologically, Nuckolls County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Zone vs. an actual test

Nuckolls 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 Nuckolls 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.

Testing and mitigation in Nuckolls County

Mitigation cost doesn't depend on Nuckolls 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

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

The methodology guide shows exactly which EPA and Census sources feed Nuckolls County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.