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Map of Radon Zones in Iowa based on Environmental Protection Agency (EPA) data

Back to Radon Zones in the United States




Radon zones
 Zone 3 (0 counties)
 Zone 2 (0 counties)
 Zone 1 (99 counties)
  Highest Potential: counties have a predicted average indoor radon screening level greater than 4 pCi/L (pico curies per liter) (red zones)
  Moderate Potential: counties have a predicted average indoor radon screening level between 2 and 4 pCi/L (orange zones)
  Low Potential: counties have a predicted average indoor radon screening level less than 2 pCi/L (yellow zones)
Adair County
Radon zone : 1

Adams County
Radon zone : 1

Allamakee County
Radon zone : 1

Appanoose County
Radon zone : 1

Audubon County
Radon zone : 1

Benton County
Radon zone : 1

Black Hawk County
Radon zone : 1

Boone County
Radon zone : 1

Bremer County
Radon zone : 1

Buchanan County
Radon zone : 1

Buena Vista County
Radon zone : 1

Butler County
Radon zone : 1

Calhoun County
Radon zone : 1

Carroll County
Radon zone : 1

Cass County
Radon zone : 1

Cedar County
Radon zone : 1

Cerro Gordo County
Radon zone : 1

Cherokee County
Radon zone : 1

Chickasaw County
Radon zone : 1

Clarke County
Radon zone : 1

Clay County
Radon zone : 1

Clayton County
Radon zone : 1

Clinton County
Radon zone : 1

Crawford County
Radon zone : 1

Dallas County
Radon zone : 1

Davis County
Radon zone : 1

Decatur County
Radon zone : 1

Delaware County
Radon zone : 1

Des Moines County
Radon zone : 1

Dickinson County
Radon zone : 1

Dubuque County
Radon zone : 1

Emmet County
Radon zone : 1

Fayette County
Radon zone : 1

Floyd County
Radon zone : 1

Franklin County
Radon zone : 1

Fremont County
Radon zone : 1

Greene County
Radon zone : 1

Grundy County
Radon zone : 1

Guthrie County
Radon zone : 1

Hamilton County
Radon zone : 1

Hancock County
Radon zone : 1

Hardin County
Radon zone : 1

Harrison County
Radon zone : 1

Henry County
Radon zone : 1

Howard County
Radon zone : 1

Humboldt County
Radon zone : 1

Ida County
Radon zone : 1

Iowa County
Radon zone : 1

Jackson County
Radon zone : 1

Jasper County
Radon zone : 1

Jefferson County
Radon zone : 1

Johnson County
Radon zone : 1

Jones County
Radon zone : 1

Keokuk County
Radon zone : 1

Kossuth County
Radon zone : 1

Lee County
Radon zone : 1

Linn County
Radon zone : 1

Louisa County
Radon zone : 1

Lucas County
Radon zone : 1

Lyon County
Radon zone : 1

Madison County
Radon zone : 1

Mahaska County
Radon zone : 1

Marion County
Radon zone : 1

Marshall County
Radon zone : 1

Mills County
Radon zone : 1

Mitchell County
Radon zone : 1

Monona County
Radon zone : 1

Monroe County
Radon zone : 1

Montgomery County
Radon zone : 1

Muscatine County
Radon zone : 1

O'Brien County
Radon zone : 1

Osceola County
Radon zone : 1

Page County
Radon zone : 1

Palo Alto County
Radon zone : 1

Plymouth County
Radon zone : 1

Pocahontas County
Radon zone : 1

Polk County
Radon zone : 1

Pottawattamie County
Radon zone : 1

Poweshiek County
Radon zone : 1

Ringgold County
Radon zone : 1

Sac County
Radon zone : 1

Scott County
Radon zone : 1

Shelby County
Radon zone : 1

Sioux County
Radon zone : 1

Story County
Radon zone : 1

Tama County
Radon zone : 1

Taylor County
Radon zone : 1

Union County
Radon zone : 1

Van Buren County
Radon zone : 1

Wapello County
Radon zone : 1

Warren County
Radon zone : 1

Washington County
Radon zone : 1

Wayne County
Radon zone : 1

Webster County
Radon zone : 1

Winnebago County
Radon zone : 1

Winneshiek County
Radon zone : 1

Woodbury County
Radon zone : 1

Worth County
Radon zone : 1

Wright County
Radon zone : 1


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