Radon zones in Iowa
Zone 1: 99, Zone 2: 0, Zone 3: 0. A zone is an area estimate; EPA says all homes should be tested.
- Adair County Zone 1
- Adams County Zone 1
- Allamakee County Zone 1
- Appanoose County Zone 1
- Audubon County Zone 1
- Benton County Zone 1
- Black Hawk County Zone 1
- Boone County Zone 1
- Bremer County Zone 1
- Buchanan County Zone 1
- Buena Vista County Zone 1
- Butler County Zone 1
- Calhoun County Zone 1
- Carroll County Zone 1
- Cass County Zone 1
- Cedar County Zone 1
- Cerro Gordo County Zone 1
- Cherokee County Zone 1
- Chickasaw County Zone 1
- Clarke County Zone 1
- Clay County Zone 1
- Clayton County Zone 1
- Clinton County Zone 1
- Crawford County Zone 1
- Dallas County Zone 1
- Davis County Zone 1
- Decatur County Zone 1
- Delaware County Zone 1
- Des Moines County Zone 1
- Dickinson County Zone 1
- Dubuque County Zone 1
- Emmet County Zone 1
- Fayette County Zone 1
- Floyd County Zone 1
- Franklin County Zone 1
- Fremont County Zone 1
- Greene County Zone 1
- Grundy County Zone 1
- Guthrie County Zone 1
- Hamilton County Zone 1
- Hancock County Zone 1
- Hardin County Zone 1
- Harrison County Zone 1
- Henry County Zone 1
- Howard County Zone 1
- Humboldt County Zone 1
- Ida County Zone 1
- Iowa County Zone 1
- Jackson County Zone 1
- Jasper County Zone 1
- Jefferson County Zone 1
- Johnson County Zone 1
- Jones County Zone 1
- Keokuk County Zone 1
- Kossuth County Zone 1
- Lee County Zone 1
- Linn County Zone 1
- Louisa County Zone 1
- Lucas County Zone 1
- Lyon County Zone 1
- Madison County Zone 1
- Mahaska County Zone 1
- Marion County Zone 1
- Marshall County Zone 1
- Mills County Zone 1
- Mitchell County Zone 1
- Monona County Zone 1
- Monroe County Zone 1
- Montgomery County Zone 1
- Muscatine County Zone 1
- O'Brien County Zone 1
- Osceola County Zone 1
- Page County Zone 1
- Palo Alto County Zone 1
- Plymouth County Zone 1
- Pocahontas County Zone 1
- Polk County Zone 1
- Pottawattamie County Zone 1
- Poweshiek County Zone 1
- Ringgold County Zone 1
- Sac County Zone 1
- Scott County Zone 1
- Shelby County Zone 1
- Sioux County Zone 1
- Story County Zone 1
- Tama County Zone 1
- Taylor County Zone 1
- Union County Zone 1
- Van Buren County Zone 1
- Wapello County Zone 1
- Warren County Zone 1
- Washington County Zone 1
- Wayne County Zone 1
- Webster County Zone 1
- Winnebago County Zone 1
- Winneshiek County Zone 1
- Woodbury County Zone 1
- Worth County Zone 1
- Wright County Zone 1
County not listed? See what we left out and why. Leave your email to hear if this data changes.