Red Willow County, NE: EPA's radon zone, explained
Red Willow County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Rank it against the rest of the country and Red Willow County lands in the 76th percentile for radon potential.
Where Red Willow County sits nationally
Red Willow County, Nebraska is home to about 10,409 people across 717.17 square miles. That works out to roughly 15 people per square mile. By population, Red Willow County is the 752nd largest of every county sharing its EPA zone — the 29th percentile by population within that zone. Red Willow 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 Red Willow County
Where the national indoor average runs about 1.3 pCi/L, Red Willow County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Being in Zone 1 raises the odds Red Willow County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.
Next steps for a home in Red Willow County
For a Red Willow 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 Red Willow County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Red Willow County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.
Where Red Willow 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.