Designated area
| Designation
a
| Classification
|
---|
Date
1
| Type
| Date
| Type
|
---|
Statewide:
| | | | |
Adair County | | Unclassifiable/Attainment.
| | |
Adams County | | Unclassifiable/Attainment.
| | |
Allamakee County | | Unclassifiable/Attainment.
| | |
Appanoose County | | Unclassifiable/Attainment.
| | |
Audubon County | | Unclassifiable/Attainment.
| | |
Benton County | | Unclassifiable/Attainment.
| | |
Black Hawk County | | Unclassifiable/Attainment.
| | |
Boone County | | Unclassifiable/Attainment.
| | |
Bremer County | | Unclassifiable/Attainment.
| | |
Buchanan County | | Unclassifiable/Attainment.
| | |
Buena Vista County | | Unclassifiable/Attainment.
| | |
Butler County | | Unclassifiable/Attainment.
| | |
Calhoun County | | Unclassifiable/Attainment.
| | |
Carroll County | | Unclassifiable/Attainment.
| | |
Cass County | | Unclassifiable/Attainment.
| | |
Cedar County | | Unclassifiable/Attainment.
| | |
Cerro Gordo County | | Unclassifiable/Attainment.
| | |
Cherokee County | | Unclassifiable/Attainment.
| | |
Chickasaw County | | Unclassifiable/Attainment.
| | |
Clarke County | | Unclassifiable/Attainment.
| | |
Clay County | | Unclassifiable/Attainment.
| | |
Clayton County | | Unclassifiable/Attainment.
| | |
Clinton County | | Unclassifiable/Attainment.
| | |
Crawford County | | Unclassifiable/Attainment.
| | |
Dallas County | | Unclassifiable/Attainment.
| | |
Davis County | | Unclassifiable/Attainment.
| | |
Decatur County | | Unclassifiable/Attainment.
| | |
Delaware County | | Unclassifiable/Attainment.
| | |
Des Moines County | | Unclassifiable/Attainment.
| | |
Dickinson County | | Unclassifiable/Attainment.
| | |
Dubuque County | | Unclassifiable/Attainment.
| | |
Emmet County | | Unclassifiable/Attainment.
| | |
Fayette County | | Unclassifiable/Attainment.
| | |
Floyd County | | Unclassifiable/Attainment.
| | |
Franklin County | | Unclassifiable/Attainment.
| | |
Fremont County | | Unclassifiable/Attainment.
| | |
Greene County | | Unclassifiable/Attainment.
| | |
Grundy County | | Unclassifiable/Attainment.
| | |
Guthrie County | | Unclassifiable/Attainment.
| | |
Hamilton County | | Unclassifiable/Attainment.
| | |
Hancock County | | Unclassifiable/Attainment.
| | |
Hardin County | | Unclassifiable/Attainment.
| | |
Harrison County | | Unclassifiable/Attainment.
| | |
Henry County | | Unclassifiable/Attainment.
| | |
Howard County | | Unclassifiable/Attainment.
| | |
Humboldt County | | Unclassifiable/Attainment.
| | |
Ida County | | Unclassifiable/Attainment.
| | |
Iowa County | | Unclassifiable/Attainment.
| | |
Jackson County | | Unclassifiable/Attainment.
| | |
Jasper County | | Unclassifiable/Attainment.
| | |
Jefferson County | | Unclassifiable/Attainment.
| | |
Johnson County | | Unclassifiable/Attainment.
| | |
Jones County | | Unclassifiable/Attainment.
| | |
Keokuk County | | Unclassifiable/Attainment.
| | |
Kossuth County | | Unclassifiable/Attainment.
| | |
Lee County | | Unclassifiable/Attainment.
| | |
Linn County | | Unclassifiable/Attainment.
| | |
Louisa County | | Unclassifiable/Attainment.
| | |
Lucas County | | Unclassifiable/Attainment.
| | |
Lyon County | | Unclassifiable/Attainment.
| | |
Madison County | | Unclassifiable/Attainment.
| | |
Mahaska County | | Unclassifiable/Attainment.
| | |
Marion County | | Unclassifiable/Attainment.
| | |
Marshall County | | Unclassifiable/Attainment.
| | |
Mills County | | Unclassifiable/Attainment.
| | |
Mitchell County | | Unclassifiable/Attainment.
| | |
Monona County | | Unclassifiable/Attainment.
| | |
Monroe County | | Unclassifiable/Attainment.
| | |
Montgomery County | | Unclassifiable/Attainment.
| | |
Muscatine County | | Unclassifiable/Attainment.
| | |
O'Brien County | | Unclassifiable/Attainment.
| | |
Osceola County | | Unclassifiable/Attainment.
| | |
Page County | | Unclassifiable/Attainment.
| | |
Palo Alto County | | Unclassifiable/Attainment.
| | |
Plymouth County | | Unclassifiable/Attainment.
| | |
Pocahontas County | | Unclassifiable/Attainment.
| | |
Polk County | | Unclassifiable/Attainment.
| | |
Pottawattamie County | | Unclassifiable/Attainment.
| | |
Poweshiek County | | Unclassifiable/Attainment.
| | |
Ringgold County | | Unclassifiable/Attainment.
| | |
Sac County | | Unclassifiable/Attainment.
| | |
Scott County | | Unclassifiable/Attainment.
| | |
Shelby County | | Unclassifiable/Attainment.
| | |
Sioux County | | Unclassifiable/Attainment.
| | |
Story County | | Unclassifiable/Attainment.
| | |
Tama County | | Unclassifiable/Attainment.
| | |
Taylor County | | Unclassifiable/Attainment.
| | |
Union County | | Unclassifiable/Attainment.
| | |
Van Buren County | | Unclassifiable/Attainment.
| | |
Wapello County | | Unclassifiable/Attainment.
| | |
Warren County | | Unclassifiable/Attainment.
| | |
Washington County | | Unclassifiable/Attainment.
| | |
Wayne County | | Unclassifiable/Attainment.
| | |
Webster County | | Unclassifiable/Attainment.
| | |
Winnebago County | | Unclassifiable/Attainment.
| | |
Winneshiek County | | Unclassifiable/Attainment.
| | |
Woodbury County | | Unclassifiable/Attainment.
| | |
Worth County | | Unclassifiable/Attainment.
| | |
Wright County | | Unclassifiable/Attainment.
| | |