Harlan County, NE radon potential

EPA places Harlan 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 69th percentile for radon potential — Harlan County outranks 69% of every county EPA has rated.

Harlan County by the numbers

Harlan County, Nebraska is home to about 3,018 people across 553.466 square miles. That works out to roughly 5 people per square mile. Within its own EPA zone, Harlan County is bigger by population than 8% of the counties that share it. EPA's geology-based Region 7 groups Harlan County with 411 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Where the national indoor average runs about 1.3 pCi/L, Harlan County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Some Harlan County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Testing and mitigation in Harlan County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Nebraska's state radon program

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.