Dawson County, NE: EPA's radon zone, explained

EPA places Dawson County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Dawson County sits at the 48th percentile nationally for radon potential — above 48 of every 100 rated counties.

Where Dawson County sits nationally

Dawson County, Nebraska is home to about 24,554 people across 1,013.786 square miles. Population density there runs about 24 people per square mile. By population, Dawson County is the 558th largest of every county sharing its EPA zone — the 46th percentile by population within that zone. EPA's geology-based Region 7 groups Dawson County with 411 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

EPA's Zone 2 rating for Dawson County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Dawson County — testing is the only way to know an individual home's actual level.

Testing and mitigation in Dawson County

For a Dawson County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Nebraska's state radon program

For Dawson County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Dawson 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 Dawson County's figures come from

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