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

EPA's own radon map rates Kimball County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. That puts Kimball County in the 35th percentile nationally for radon potential — higher than 35% of the counties EPA has rated.

How Kimball County compares

Kimball County, Nebraska is home to about 3,305 people across 951.942 square miles. Population density there runs about 3 people per square mile. By population, Kimball County is the 979th largest of every county sharing its EPA zone — the 5th percentile by population within that zone. EPA's geology-based Region 7 groups Kimball County with 411 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Kimball County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). A county-wide moderate average, like Kimball County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Testing and mitigation in Kimball County

For a Kimball 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 Kimball County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Kimball County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Kimball County's figures come from

Kimball County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Kimball County carries, the zone explainer covers what it does and doesn't tell you about any one house.