Nebraska Radon Levels
53Zone 1 (High)
24Zone 2 (Moderate)
16Zone 3 (Low)
57% of counties in Nebraska are classified as EPA Zone 1 (highest radon potential), meaning predicted average indoor radon levels exceed 4 pCi/L — the EPA action level. The EPA recommends that all homes be tested for radon, regardless of zone classification.
| County | EPA Zone | Risk Level |
|---|---|---|
| Adams County | Zone 1 | Highest Potential |
| Antelope County | Zone 2 | Moderate Potential |
| Arthur County | Zone 3 | Lowest Potential |
| Banner County | Zone 2 | Moderate Potential |
| Blaine County | Zone 3 | Lowest Potential |
| Boone County | Zone 1 | Highest Potential |
| Box Butte County | Zone 2 | Moderate Potential |
| Boyd County | Zone 1 | Highest Potential |
| Brown County | Zone 3 | Lowest Potential |
| Buffalo County | Zone 2 | Moderate Potential |
| Burt County | Zone 1 | Highest Potential |
| Butler County | Zone 1 | Highest Potential |
| Cass County | Zone 1 | Highest Potential |
| Cedar County | Zone 1 | Highest Potential |
| Chase County | Zone 2 | Moderate Potential |
| Cherry County | Zone 3 | Lowest Potential |
| Cheyenne County | Zone 2 | Moderate Potential |
| Clay County | Zone 1 | Highest Potential |
| Colfax County | Zone 1 | Highest Potential |
| Cuming County | Zone 1 | Highest Potential |
| Custer County | Zone 2 | Moderate Potential |
| Dakota County | Zone 1 | Highest Potential |
| Dawes County | Zone 2 | Moderate Potential |
| Dawson County | Zone 2 | Moderate Potential |
| Deuel County | Zone 2 | Moderate Potential |
| Dixon County | Zone 1 | Highest Potential |
| Dodge County | Zone 1 | Highest Potential |
| Douglas County | Zone 1 | Highest Potential |
| Dundy County | Zone 2 | Moderate Potential |
| Fillmore County | Zone 1 | Highest Potential |
| Franklin County | Zone 1 | Highest Potential |
| Frontier County | Zone 1 | Highest Potential |
| Furnas County | Zone 1 | Highest Potential |
| Gage County | Zone 1 | Highest Potential |
| Garden County | Zone 3 | Lowest Potential |
| Garfield County | Zone 3 | Lowest Potential |
| Gosper County | Zone 1 | Highest Potential |
| Grant County | Zone 3 | Lowest Potential |
| Greeley County | Zone 1 | Highest Potential |
| Hall County | Zone 2 | Moderate Potential |
| Hamilton County | Zone 1 | Highest Potential |
| Harlan County | Zone 1 | Highest Potential |
| Hayes County | Zone 1 | Highest Potential |
| Hitchcock County | Zone 1 | Highest Potential |
| Holt County | Zone 3 | Lowest Potential |
| Hooker County | Zone 3 | Lowest Potential |
| Howard County | Zone 2 | Moderate Potential |
| Jefferson County | Zone 1 | Highest Potential |
| Johnson County | Zone 1 | Highest Potential |
| Kearney County | Zone 1 | Highest Potential |
| Keith County | Zone 2 | Moderate Potential |
| Keya Paha County | Zone 2 | Moderate Potential |
| Kimball County | Zone 2 | Moderate Potential |
| Knox County | Zone 1 | Highest Potential |
| Lancaster County | Zone 1 | Highest Potential |
| Lincoln County | Zone 3 | Lowest Potential |
| Logan County | Zone 3 | Lowest Potential |
| Loup County | Zone 3 | Lowest Potential |
| McPherson County | Zone 3 | Lowest Potential |
| Madison County | Zone 1 | Highest Potential |
| Merrick County | Zone 2 | Moderate Potential |
| Morrill County | Zone 2 | Moderate Potential |
| Nance County | Zone 1 | Highest Potential |
| Nemaha County | Zone 1 | Highest Potential |
| Nuckolls County | Zone 1 | Highest Potential |
| Otoe County | Zone 1 | Highest Potential |
| Pawnee County | Zone 1 | Highest Potential |
| Perkins County | Zone 2 | Moderate Potential |
| Phelps County | Zone 1 | Highest Potential |
| Pierce County | Zone 1 | Highest Potential |
| Platte County | Zone 1 | Highest Potential |
| Polk County | Zone 1 | Highest Potential |
| Red Willow County | Zone 1 | Highest Potential |
| Richardson County | Zone 1 | Highest Potential |
| Rock County | Zone 3 | Lowest Potential |
| Saline County | Zone 1 | Highest Potential |
| Sarpy County | Zone 1 | Highest Potential |
| Saunders County | Zone 1 | Highest Potential |
| Scotts Bluff County | Zone 2 | Moderate Potential |
| Seward County | Zone 1 | Highest Potential |
| Sheridan County | Zone 2 | Moderate Potential |
| Sherman County | Zone 2 | Moderate Potential |
| Sioux County | Zone 2 | Moderate Potential |
| Stanton County | Zone 1 | Highest Potential |
| Thayer County | Zone 1 | Highest Potential |
| Thomas County | Zone 3 | Lowest Potential |
| Thurston County | Zone 1 | Highest Potential |
| Valley County | Zone 2 | Moderate Potential |
| Washington County | Zone 1 | Highest Potential |
| Wayne County | Zone 1 | Highest Potential |
| Webster County | Zone 1 | Highest Potential |
| Wheeler County | Zone 3 | Lowest Potential |
| York County | Zone 1 | Highest Potential |