GroundRules
40 CFR 81.316: Iowa.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER C—AIR PROGRAMS
- PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES
- Subpart C—Section 107 Attainment Status Designations
Iowa—TSP
Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
Central portion of Waterloo X
Cedar Falls Township X
East Waterloo Township X
Remainder of Black Hawk County X
Mason City—A portion of Cerro Gordo County contained entirely within sections 27, 28, 29, 32, 33, 34 and 35 of T97N R20W and sections 2, 3, 4 and 5 of T96N R20W X
Mason City—two separate portions of Cerro Gordo County contained entirely within sections 13, 24 and 25 of T97N R21W; sections 18, 19, 20, 21, 30, 31 and 35 of T97N R20W; and sections 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 15, 16 and 17 of T96N R20W X
Falls Township X
Lake Township X
Lincoln Township X
Remainder of Cerro Gordo County X
An area around downtown Clinton X
Comanche Township X
Remainder of Clinton County X
Burlington Township X
Remainder of Des Moines County X
Iowa City Township X
Remainder of Johnson County X
An area in and near Keokuk X
Jackson Township X
Jefferson Township X
Madison Township X
Remainder of Lee County X
Cedar Rapids—a portion of Linn County contained entirely within T 82 N., R 7 W.; and T 83 N., R 7 W X
Bertram Township X
Clinton Township X
College Township X
Fairfax Township X
Marion Township X
Monroe Township X
Putnam Township X
Remainder of Linn County X
The central portion of Marshalltown X
Remainder of Marshall County X
The central and southern portions of Muscatine X
Fruitland Township X
Sweetland Township X
Montpelier Township X
Remainder of Muscatine County X
An area of central Des Moines east of U.S. Highway 65 & 69 (E. 14th Street) X
Portions of Polk County contained entirely within T 78 N. R 23 W.; T 78 N. R 24 W.; T 78 N. R 25 W.; T 80 R 24 W.; T 79 N. R 23 W.; T 79 N. R 24 W.; and T 79 R 25 W X
Clay Township X
Douglas Township X
Jefferson Township X
Remainder of Polk County X
The western portion of Council Bluffs and Carter Lake X
Lake Township X
Lewis Township X
Remainder of Pottawatomie County X
Portions of Buffalo, Davenport, Bettendorf and Riverdale X
Remainder of Scott County X
Center Township X
Remainder of Wapello County X
The central portion Ft. Dodge X
Otho Township X
Remainder of Webster County X
The central and southern portions of Sioux City X
Liberty Township X
Woodbury Township X
Remainder of Woodbury County X
Remainder of State X
1 EPA designation replaces State designation.
Iowa—1971 Sulfur Dioxide NAAQS
[Primary and Secondary]
Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
Entire state X
Iowa—2010 Sulfur Dioxide NAAQS
[Primary]
Designated area 1 Designation
Date 2 Type
Muscatine, IA 11/18/2025 Attainment.
Muscatine County (part)
Sections 1-3, 10-15, 22-27, 34-36 of T77N, R3W (Lake Township)
Sections 1-3, 10-15, 22-27, 34-36 of T76N, R3W (Seventy-six Township)
T77N, R2W (Bloomington Township)
T76N, R2W (Fruitland Township)
All sections except 1, 12, 13, 24, 25, 36 of T77N, R1W (Sweetland Township)
Linn County, IA Unclassifiable.
Linn County
Woodbury County, IA 9/12/2016 Unclassifiable.
Woodbury County
Des Moines County, IA 9/12/2016 Attainment/Unclassifiable.
Des Moines County
Louisa County, IA Attainment/Unclassifiable.
Louisa County
Pottawattamie County, IA Attainment/Unclassifiable.
Pottawattamie County
Wapello County, IA 9/12/2016 Attainment/Unclassifiable.
Wapello County
Statewide: Attainment/Unclassifiable.
Adair County
Adams County
Allamakee County
Appanoose County
Audubon County
Benton County
Black Hawk County
Boone County
Bremer County
Buchanan County
Buena Vista County
Butler County
Calhoun County
Carroll County
Cass County
Cedar County
Cerro Gordo County
Cherokee County
Chickasaw County
Clarke County
Clay County
Clayton County
Clinton County
Crawford County
Dallas County
Davis County
Decatur County
Delaware County
Dickinson County
Dubuque County
Emmet County
Fayette County
Floyd County
Franklin County
Fremont County
Greene County
Grundy County
Guthrie County
Hamilton County
Hancock County
Hardin County
Harrison County
Henry County
Howard County
Humboldt County
Ida County
Iowa County
Jackson County
Jasper County
Jefferson County
Johnson County
Jones County
Keokuk County
Kossuth County
Lee County
Lucas County
Lyon County
Madison County
Mahaska County
Marion County
Marshall County
Mills County
Mitchell County
Monona County
Monroe County
Montgomery County
Muscatine County (portion of Muscatine County not designated Nonattainment on 10/4/2013)
O'Brien County
Osceola County
Page County
Palo Alto County
Plymouth County
Pocahontas County
Polk County
Poweshiek County
Ringgold County
Sac County
Scott County
Shelby County
Sioux County
Story County
Tama County
Taylor County
Union County
Van Buren County
Warren County
Washington County
Wayne County
Webster County
Winnebago County
Winneshiek County
Worth County
Wright County
1 Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.
2 This date is April 9, 2018, unless otherwise noted.
Iowa—Carbon Monoxide
Designated Area Designation Classification
Date 1 Type Date 1 Type
Statewide Unclassifiable/Attainment
Adair County
Adams County
Allamakee County
Appanoose County
Audubon County
Benton County
Black Hawk County
Boone County
Bremer County
Buchanan County
Buena Vista County
Butler County
Calhoun County
Carroll County
Cass County
Cedar County
Cerro Gordo County
Cherokee County
Chickasaw County
Clarke County
Clay County
Clayton County
Clinton County
Crawford County
Dallas County
Davis County
Decatur County
Delaware County
Des Moines County
Dickinson County
Dubuque County
Emmet County
Fayette County
Floyd County
Franklin County
Fremont County
Greene County
Grundy County
Guthrie County
Hamilton County
Hancock County
Hardin County
Harrison County
Henry County
Howard County
Humboldt County
Ida County
Iowa County
Jackson County
Jasper County
Jefferson County
Johnson County
Jones County
Keokuk County
Kossuth County
Lee County
Linn County
Louisa County
Lucas County
Lyon County
Madison County
Mahaska County
Marion County
Marshall County
Mills County
Mitchell County
Monona County
Monroe County
Montgomery County
Muscatine County
O'Brien County
Osceola County
Page County
Palo Alto County
Plymouth County
Pocahontas County
Polk County
Pottawattamie County
Poweshiek County
Ringgold County
Sac County
Scott County
Shelby County
Sioux County
Story County
Tama County
Taylor County
Union County
Van Buren County
Wapello County
Warren County
Washington County
Wayne County
Webster County
Winnebago County
Winneshiek County
Woodbury County
Worth County
Wright County
1 This date is November 15, 1990, unless otherwise noted.
Iowa—Ozone (1-Hour Standard)2
Designated area Designation Classification
Date1 Type Date1 Type
Statewide Unclassifiable/Attainment
Adair County
Adams County
Allamakee County
Appanoose County
Audubon County
Benton County
Black Hawk County
Boone County
Bremer County
Buchanan County
Buena Vista County
Butler County
Calhoun County
Carroll County
Cass County
Cedar County
Cerro Gordo County
Cherokee County
Chickasaw County
Clarke County
Clay County
Clayton County
Clinton County
Crawford County
Dallas County
Davis County
Decatur County
Delaware County
Des Moines County
Dickinson County
Dubuque County
Emmet County
Fayette County
Floyd County
Franklin County
Fremont County
Greene County
Grundy County
Guthrie County
Hamilton County
Hancock County
Hardin County
Harrison County
Henry County
Howard County
Humboldt County
Ida County
Iowa County
Jackson County
Jasper County
Jefferson County
Johnson County
Jones County
Keokuk County
Kossuth County
Lee County
Linn County
Louisa County
Lucas County
Lyon County
Madison County
Mahaska County
Marion County
Marshall County
Mills County
Mitchell County
Monona County
Monroe County
Montgomery County
Muscatine County
O'Brien County
Osceola County
Page County
Palo Alto County
Plymouth County
Pocahontas County
Polk County
Pottawattamie County
Poweshiek County
Ringgold County
Sac County
Scott County
Shelby County
Sioux County
Story County
Tama County
Taylor County
Union County
Van Buren County
Wapello County
Warren County
Washington County
Wayne County
Webster County
Winnebago County
Winneshiek County
Woodbury County
Worth County
Wright County
1 This date is October 18, 2000, unless otherwise noted.
2 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Iowa.
Iowa—1997 Annual PM2.5 NAAQS
[Primary and Secondary]
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.
a Includes Indian Country located in each county or area, except as otherwise specified.
1 This date is 90 days after January 5, 2005, unless otherwise noted.
Iowa—2012 Annual PM2.5 NAAQS
[Primary]
Designated area 1 Designation Classification
Date 2 Type Date 2 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
1 Includes areas of Indian country located in each county or area, except as otherwise specified.
2 This date is April 15, 2015, unless otherwise noted.
Iowa—1997 24-Hour PM2.5 NAAQS
[Primary and Secondary]
Designated area Designationa Classification
Date1 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
a Includes Indian Country located in each county or area, except as otherwise specified.
1 This date is 90 days after January 5, 2005, unless otherwise noted.
Iowa—2006 24-Hour PM2.5 NAAQS
[Primary and Secondary]
Designated area Designationa Classification
Date1 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
a Includes Indian Country located in each county or area, except as otherwise specified.
1 This date is 30 days after November 13, 2009, unless otherwise noted.
Iowa—NO2 (1971 Annual Standard)
Designated area Does not meet primary standards Cannot be classified or better than national standards
Entire State X
Iowa—NO2 (2010 1-Hour Standard)
Designated area Designation a
Date 1 Type
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.
a Includes Indian Country located in each county or area, except as otherwise specified.
1 This date is 90 days after October 31, 2011, unless otherwise noted.
Iowa—1997 8-Hour Ozone NAAQS
[Primary and Secondary]
Designated area Designation a Category/classification
Date 1 Type Date 1 Type
Statewide Unclassifiable/Attainment
Adair County
Adams County
Allamakee County
Appanoose County
Audubon County
Benton County
Black Hawk County
Boone County
Bremer County
Buchanan County
Buena Vista County
Butler County
Calhoun County
Carroll County
Cass County
Cedar County
Cerro Gordo County
Cherokee County
Chickasaw County
Clarke County
Clay County
Clayton County
Clinton County
Crawford County
Dallas County
Davis County
Decatur County
Delaware County
Des Moines County
Dickinson County
Dubuque County
Emmet County
Fayette County
Floyd County
Franklin County
Fremont County
Greene County
Grundy County
Guthrie County
Hamilton County
Hancock County
Hardin County
Harrison County
Henry County
Howard County
Humboldt County
Ida County
Iowa County
Jackson County
Jasper County
Jefferson County
Johnson County
Jones County
Keokuk County
Kossuth County
Lee County
Linn County
Louisa County
Lucas County
Lyon County
Madison County
Mahaska County
Marion County
Marshall County
Mills County
Mitchell County
Monona County
Monroe County
Montgomery County
Muscatine County
O'Brien County
Osceola County
Page County
Palo Alto County
Plymouth County
Pocahontas County
Polk County
Pottawattamie County
Poweshiek County
Ringgold County
Sac County
Scott County
Shelby County
Sioux County
Story County
Tama County
Taylor County
Union County
Van Buren County
Wapello County
Warren County
Washington County
Wayne County
Webster County
Winnebago County
Winneshiek County
Woodbury County
Worth County
Wright County
a Includes Indian Country located in each county or area, except as otherwise specified.
1 This date is June 15, 2004, unless otherwise noted.
Iowa—2008 8-Hour Ozone NAAQS
[Primary and Secondary]
Designated area Designation Classification
Date 1 Type Date 1 Type
Statewide and Any Areas of Indian Country: Unclassifiable/Attainment
Adair County
Adams County
Allamakee County
Appanoose County
Audubon County
Benton County
Black Hawk County
Boone County
Bremer County
Buchanan County
Buena Vista County
Butler County
Calhoun County
Carroll County
Cass County
Cedar County
Cerro Gordo County
Cherokee County
Chickasaw County
Clarke County
Clay County
Clayton County
Clinton County
Crawford County
Dallas County
Davis County
Decatur County
Delaware County
Des Moines County
Dickinson County
Dubuque County
Emmet County
Fayette County
Floyd County
Franklin County
Fremont County
Greene County
Grundy County
Guthrie County
Hamilton County
Hancock County
Hardin County
Harrison County
Henry County
Howard County
Humboldt County
Ida County
Iowa County
Jackson County
Jasper County
Jefferson County
Johnson County
Jones County
Keokuk County
Kossuth County
Lee County
Linn County
Louisa County
Lucas County
Lyon County
Madison County
Mahaska County
Marion County
Marshall County
Mills County
Mitchell County
Monona County
Monroe County
Montgomery County
Muscatine County
O'Brien County
Osceola County
Page County
Palo Alto County
Plymouth County
Pocahontas County
Polk County
Pottawattamie County
Poweshiek County
Ringgold County
Sac County
Scott County
Shelby County
Sioux County
Story County
Tama County
Taylor County
Union County
Van Buren County
Wapello County
Warren County
Washington County
Wayne County
Webster County
Winnebago County
Winneshiek County
Woodbury County
Worth County
Wright County
1 This date is July 20, 2012, unless otherwise noted.
Iowa—2015 8-Hour Ozone NAAQS
[Primary and Secondary]
Designated area 1 Designation Classification
Date 2 Type Date Type
Statewide Attainment/Unclassifiable
Adair County.
Adams County.
Allamakee County.
Appanoose County.
Audubon County.
Benton County.
Black Hawk County.
Boone County.
Bremer County.
Buchanan County.
Buena Vista County.
Butler County.
Calhoun County.
Carroll County.
Cass County.
Cedar County.
Cerro Gordo County.
Cherokee County.
Chickasaw County.
Clarke County.
Clay County.
Clayton County.
Clinton County.
Crawford County.
Dallas County.
Davis County.
Decatur County.
Delaware County.
Des Moines County.
Dickinson County.
Dubuque County.
Emmet County.
Fayette County.
Floyd County.
Franklin County.
Fremont County.
Greene County.
Grundy County.
Guthrie County.
Hamilton County.
Hancock County.
Hardin County.
Harrison County.
Henry County.
Howard County.
Humboldt County.
Ida County.
Iowa County.
Jackson County.
Jasper County.
Jefferson County.
Johnson County.
Jones County.
Keokuk County.
Kossuth County.
Lee County.
Linn County.
Louisa County.
Lucas County.
Lyon County.
Madison County.
Mahaska County.
Marion County.
Marshall County.
Mills County.
Mitchell County.
Monona County.
Monroe County.
Montgomery County.
Muscatine County.
O'Brien County.
Osceola County.
Page County.
Palo Alto County.
Plymouth County.
Pocahontas County.
Polk County.
Pottawattamie County.
Poweshiek County.
Ringgold County.
Sac County.
Scott County.
Shelby County.
Sioux County.
Story County.
Tama County.
Taylor County.
Union County.
Van Buren County.
Wapello County.
Warren County.
Washington County.
Wayne County.
Webster County.
Winnebago County.
Winneshiek County.
Woodbury County.
Worth County.
Wright County. .
1 Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.
2 This date is January 16, 2018, unless otherwise noted.
Iowa—2008 Lead NAAQS
Designated area Designation for the 2008 NAAQS a
Date 1 Type
Pottawattamie County, IA:
Pottawattamie County (part) 10/4/2018 Attainment.
Area bounded by Avenue G on the north, N 16th/S 16th street on the east, 23rd Avenue on the south, and N 35th/S 35th street on the west
Rest of State Unclassifiable/Attainment.
a Includes Indian Country located in each county or area, except as otherwise specified.
1 December 31, 2011 unless otherwise noted.
Collected 2026-08-27T02:26:04Z. Source file · JSON