Is Logan County, NE a radon risk area?

EPA places Logan County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Logan County ranks higher in radon potential than 0% of rated counties (the 0th percentile).

Logan County by the numbers

About 694 people live in Logan County, Nebraska, spread over 570.698 square miles. Population density there runs about 1 people per square mile. Rank 1018 by population within its EPA zone puts Logan County at the 1st percentile among zone peers. Logan County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Logan County

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Logan County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for Logan County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Logan County

Nothing about Logan County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Nebraska's state radon program

Logan County's test kit answers today; a Airthings radon monitor keeps answering for Logan 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 Logan County's numbers. Whatever zone Logan County carries, the zone explainer covers what it does and doesn't tell you about any one house.