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

EPA places Chase 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. Chase County sits at the 35th percentile nationally for radon potential — above 35 of every 100 rated counties.

Chase County by the numbers

Chase County, Nebraska is home to about 3,764 people across 894.425 square miles. Population density there runs about 4 people per square mile. By population, Chase County is the 968th largest of every county sharing its EPA zone — the 6th percentile by population within that zone. Chase 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 Chase County

EPA's Zone 2 rating for Chase County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Middle-of-the-pack doesn't mean risk-free for any one Chase County address — a moderate county average still leaves individual homes to test either side of it.

Next steps for a home in Chase County

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

Where Chase 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. Whatever zone Chase County carries, the zone explainer covers what it does and doesn't tell you about any one house.