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Electronic Code of Federal Regulations

e-CFR data is current as of December 9, 2019

Title 40Chapter ISubchapter CPart 81Subpart C → §81.316


Title 40: Protection of Environment
PART 81—DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES
Subpart C—Section 107 Attainment Status Designations


§81.316   Iowa.

Iowa—TSP

Designated area Does not meet primary standardsDoes not meet secondary standards Cannot be classified Better than national standards
Central portion of WaterlooX
Cedar Falls TownshipX
East Waterloo TownshipX
Remainder of Black Hawk CountyX
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 R20WX
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 R20WX
Falls TownshipX
Lake TownshipX
Lincoln TownshipX
Remainder of Cerro Gordo CountyX
An area around downtown ClintonX
Comanche TownshipX
Remainder of Clinton CountyX
Burlington TownshipX
Remainder of Des Moines CountyX
Iowa City TownshipX
Remainder of Johnson CountyX
An area in and near KeokukX
Jackson TownshipX
Jefferson TownshipX
Madison TownshipX
Remainder of Lee CountyX
Cedar Rapids—a portion of Linn County contained entirely within T 82 N., R 7 W.; and T 83 N., R 7 WX
Bertram TownshipX
Clinton TownshipX
College TownshipX
Fairfax TownshipX
Marion TownshipX
Monroe TownshipX
Putnam TownshipX
Remainder of Linn CountyX
The central portion of MarshalltownX
Remainder of Marshall CountyX
The central and southern portions of MuscatineX
Fruitland TownshipX
Sweetland TownshipX
Montpelier TownshipX
Remainder of Muscatine CountyX
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 WX
Clay TownshipX
Douglas TownshipX
Jefferson TownshipX
Remainder of Polk CountyX
The western portion of Council Bluffs and Carter LakeX
Lake TownshipX
Lewis TownshipX
Remainder of Pottawatomie CountyX
Portions of Buffalo, Davenport, Bettendorf and RiverdaleX
Remainder of Scott CountyX
Center TownshipX
Remainder of Wapello CountyX
The central portion Ft. DodgeX
Otho TownshipX
Remainder of Webster CountyX
The central and southern portions of Sioux CityX
Liberty TownshipX
Woodbury TownshipX
Remainder of Woodbury CountyX
Remainder of StateX

1EPA designation replaces State designation.

Iowa—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

Designated areaDoes not meet primary standardsDoes not meet secondary standardsCannot be classifiedBetter than national standards
Entire stateX

Iowa—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area1Designation
Date2Type
Muscatine, IA10/4/13Nonattainment.
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, IAUnclassifiable.
Linn County
Woodbury County, IA9/12/16Unclassifiable.
Woodbury County
Des Moines County, IA9/12/16Attainment/Unclassifiable.
Des Moines County
Louisa County, IAAttainment/Unclassifiable.
Louisa County
Pottawattamie County, IAAttainment/Unclassifiable.
Pottawattamie County
Wapello County, IA9/12/16Attainment/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 10/4/13)
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

1Includes 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.

2This date is April 9, 2018, unless otherwise noted.

Iowa—Carbon Monoxide

Designated AreaDesignationClassification
Date1TypeDate1Type
StatewideUnclassifiable/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

1This date is November 15, 1990, unless otherwise noted.

Iowa—Ozone (1-Hour Standard)2

Designated areaDesignationClassification
Date1 TypeDate1 Type
StatewideUnclassifiable/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

1This date is October 18, 2000, unless otherwise noted.

2The 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 areaDesignationaClassification
Date1TypeDateType
Statewide:
Adair CountyUnclassifiable/Attainment.
Adams CountyUnclassifiable/Attainment.
Allamakee CountyUnclassifiable/Attainment.
Appanoose CountyUnclassifiable/Attainment.
Audubon CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Black Hawk CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Bremer CountyUnclassifiable/Attainment.
Buchanan CountyUnclassifiable/Attainment.
Buena Vista CountyUnclassifiable/Attainment.
Butler CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Cedar CountyUnclassifiable/Attainment.
Cerro Gordo CountyUnclassifiable/Attainment.
Cherokee CountyUnclassifiable/Attainment.
Chickasaw CountyUnclassifiable/Attainment.
Clarke CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clayton CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Dallas CountyUnclassifiable/Attainment.
Davis CountyUnclassifiable/Attainment.
Decatur CountyUnclassifiable/Attainment.
Delaware CountyUnclassifiable/Attainment.
Des Moines CountyUnclassifiable/Attainment.
Dickinson CountyUnclassifiable/Attainment.
Dubuque CountyUnclassifiable/Attainment.
Emmet CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Floyd CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Fremont CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Guthrie CountyUnclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Howard CountyUnclassifiable/Attainment.
Humboldt CountyUnclassifiable/Attainment.
Ida CountyUnclassifiable/Attainment.
Iowa CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Jones CountyUnclassifiable/Attainment.
Keokuk CountyUnclassifiable/Attainment.
Kossuth CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Linn CountyUnclassifiable/Attainment.
Louisa CountyUnclassifiable/Attainment.
Lucas CountyUnclassifiable/Attainment.
Lyon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Mahaska CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Mills CountyUnclassifiable/Attainment.
Mitchell CountyUnclassifiable/Attainment.
Monona CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Muscatine CountyUnclassifiable/Attainment.
O'Brien CountyUnclassifiable/Attainment.
Osceola CountyUnclassifiable/Attainment.
Page CountyUnclassifiable/Attainment.
Palo Alto CountyUnclassifiable/Attainment.
Plymouth CountyUnclassifiable/Attainment.
Pocahontas CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Pottawattamie CountyUnclassifiable/Attainment.
Poweshiek CountyUnclassifiable/Attainment.
Ringgold CountyUnclassifiable/Attainment.
Sac CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Sioux CountyUnclassifiable/Attainment.
Story CountyUnclassifiable/Attainment.
Tama CountyUnclassifiable/Attainment.
Taylor CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Van Buren CountyUnclassifiable/Attainment.
Wapello CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Winnebago CountyUnclassifiable/Attainment.
Winneshiek CountyUnclassifiable/Attainment.
Woodbury CountyUnclassifiable/Attainment.
Worth CountyUnclassifiable/Attainment.
Wright CountyUnclassifiable/Attainment.

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after January 5, 2005, unless otherwise noted.

Iowa—2012 Annual PM2.5 NAAQS

[Primary]

Designated area1DesignationClassification
Date2TypeDate2Type
Statewide:
Adair CountyUnclassifiable/Attainment
Adams CountyUnclassifiable/Attainment
Allamakee CountyUnclassifiable/Attainment
Appanoose CountyUnclassifiable/Attainment
Audubon CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Black Hawk CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Bremer CountyUnclassifiable/Attainment
Buchanan CountyUnclassifiable/Attainment
Buena Vista CountyUnclassifiable/Attainment
Butler CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Cedar CountyUnclassifiable/Attainment
Cerro Gordo CountyUnclassifiable/Attainment
Cherokee CountyUnclassifiable/Attainment
Chickasaw CountyUnclassifiable/Attainment
Clarke CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clayton CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Dallas CountyUnclassifiable/Attainment
Davis CountyUnclassifiable/Attainment
Decatur CountyUnclassifiable/Attainment
Delaware CountyUnclassifiable/Attainment
Des Moines CountyUnclassifiable/Attainment
Dickinson CountyUnclassifiable/Attainment
Dubuque CountyUnclassifiable/Attainment
Emmet CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Floyd CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Fremont CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Guthrie CountyUnclassifiable/Attainment
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Harrison CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Howard CountyUnclassifiable/Attainment
Humboldt CountyUnclassifiable/Attainment
Ida CountyUnclassifiable/Attainment
Iowa CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Jones CountyUnclassifiable/Attainment
Keokuk CountyUnclassifiable/Attainment
Kossuth CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Linn CountyUnclassifiable/Attainment
Louisa CountyUnclassifiable/Attainment
Lucas CountyUnclassifiable/Attainment
Lyon CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Mahaska CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Mills CountyUnclassifiable/Attainment
Mitchell CountyUnclassifiable/Attainment
Monona CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Muscatine CountyUnclassifiable/Attainment
O'Brien CountyUnclassifiable/Attainment
Osceola CountyUnclassifiable/Attainment
Page CountyUnclassifiable/Attainment
Palo Alto CountyUnclassifiable/Attainment
Plymouth CountyUnclassifiable/Attainment
Pocahontas CountyUnclassifiable/Attainment
Polk CountyUnclassifiable/Attainment
Pottawattamie CountyUnclassifiable/Attainment
Poweshiek CountyUnclassifiable/Attainment
Ringgold CountyUnclassifiable/Attainment
Sac CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Sioux CountyUnclassifiable/Attainment
Story CountyUnclassifiable/Attainment
Tama CountyUnclassifiable/Attainment
Taylor CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Van Buren CountyUnclassifiable/Attainment
Wapello CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Webster CountyUnclassifiable/Attainment
Winnebago CountyUnclassifiable/Attainment
Winneshiek CountyUnclassifiable/Attainment
Woodbury CountyUnclassifiable/Attainment
Worth CountyUnclassifiable/Attainment
Wright CountyUnclassifiable/Attainment

1Includes areas of Indian country located in each county or area, except as otherwise specified.

2This date is April 15, 2015, unless otherwise noted.

Iowa—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated areaDesignationaClassification
Date1TypeDateType
Statewide:
Adair CountyUnclassifiable/Attainment
Adams CountyUnclassifiable/Attainment
Allamakee CountyUnclassifiable/Attainment
Appanoose CountyUnclassifiable/Attainment
Audubon CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Black Hawk CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Bremer CountyUnclassifiable/Attainment
Buchanan CountyUnclassifiable/Attainment
Buena Vista CountyUnclassifiable/Attainment
Butler CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Cedar CountyUnclassifiable/Attainment
Cerro Gordo CountyUnclassifiable/Attainment
Cherokee CountyUnclassifiable/Attainment
Chickasaw CountyUnclassifiable/Attainment
Clarke CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clayton CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Dallas CountyUnclassifiable/Attainment
Davis CountyUnclassifiable/Attainment
Decatur CountyUnclassifiable/Attainment
Delaware CountyUnclassifiable/Attainment
Des Moines CountyUnclassifiable/Attainment
Dickinson CountyUnclassifiable/Attainment
Dubuque CountyUnclassifiable/Attainment
Emmet CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Floyd CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Fremont CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Guthrie CountyUnclassifiable/Attainment
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Harrison CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Howard CountyUnclassifiable/Attainment
Humboldt CountyUnclassifiable/Attainment
Ida CountyUnclassifiable/Attainment
Iowa CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Jones CountyUnclassifiable/Attainment
Keokuk CountyUnclassifiable/Attainment
Kossuth CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Linn CountyUnclassifiable/Attainment
Louisa CountyUnclassifiable/Attainment
Lucas CountyUnclassifiable/Attainment
Lyon CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Mahaska CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Mills CountyUnclassifiable/Attainment
Mitchell CountyUnclassifiable/Attainment
Monona CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Muscatine CountyUnclassifiable/Attainment
O'Brien CountyUnclassifiable/Attainment
Osceola CountyUnclassifiable/Attainment
Page CountyUnclassifiable/Attainment
Palo Alto CountyUnclassifiable/Attainment
Plymouth CountyUnclassifiable/Attainment
Pocahontas CountyUnclassifiable/Attainment
Polk CountyUnclassifiable/Attainment
Pottawattamie CountyUnclassifiable/Attainment
Poweshiek CountyUnclassifiable/Attainment
Ringgold CountyUnclassifiable/Attainment
Sac CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Sioux CountyUnclassifiable/Attainment
Story CountyUnclassifiable/Attainment
Tama CountyUnclassifiable/Attainment
Taylor CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Van Buren CountyUnclassifiable/Attainment
Wapello CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Webster CountyUnclassifiable/Attainment
Winnebago CountyUnclassifiable/Attainment
Winneshiek CountyUnclassifiable/Attainment
Woodbury CountyUnclassifiable/Attainment
Worth CountyUnclassifiable/Attainment
Wright CountyUnclassifiable/Attainment

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after January 5, 2005, unless otherwise noted.

Iowa—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated areaDesignationaClassification
Date1TypeDateType
Statewide:
Adair CountyUnclassifiable/Attainment.
Adams CountyUnclassifiable/Attainment
Allamakee CountyUnclassifiable/Attainment
Appanoose CountyUnclassifiable/Attainment
Audubon CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Black Hawk CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Bremer CountyUnclassifiable/Attainment
Buchanan CountyUnclassifiable/Attainment
Buena Vista CountyUnclassifiable/Attainment
Butler CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Cedar CountyUnclassifiable/Attainment
Cerro Gordo CountyUnclassifiable/Attainment
Cherokee CountyUnclassifiable/Attainment
Chickasaw CountyUnclassifiable/Attainment
Clarke CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clayton CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Dallas CountyUnclassifiable/Attainment
Davis CountyUnclassifiable/Attainment
Decatur CountyUnclassifiable/Attainment
Delaware CountyUnclassifiable/Attainment
Des Moines CountyUnclassifiable/Attainment
Dickinson CountyUnclassifiable/Attainment
Dubuque CountyUnclassifiable/Attainment
Emmet CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Floyd CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Fremont CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Guthrie CountyUnclassifiable/Attainment
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Harrison CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Howard CountyUnclassifiable/Attainment
Humboldt CountyUnclassifiable/Attainment
Ida CountyUnclassifiable/Attainment
Iowa CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Jones CountyUnclassifiable/Attainment
Keokuk CountyUnclassifiable/Attainment
Kossuth CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Linn CountyUnclassifiable/Attainment
Louisa CountyUnclassifiable/Attainment
Lucas CountyUnclassifiable/Attainment
Lyon CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Mahaska CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Mills CountyUnclassifiable/Attainment
Mitchell CountyUnclassifiable/Attainment
Monona CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Muscatine CountyUnclassifiable/Attainment
O'Brien CountyUnclassifiable/Attainment
Osceola CountyUnclassifiable/Attainment
Page CountyUnclassifiable/Attainment
Palo Alto CountyUnclassifiable/Attainment
Plymouth CountyUnclassifiable/Attainment
Pocahontas CountyUnclassifiable/Attainment
Polk CountyUnclassifiable/Attainment
Pottawattamie CountyUnclassifiable/Attainment
Poweshiek CountyUnclassifiable/Attainment
Ringgold CountyUnclassifiable/Attainment
Sac CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Sioux CountyUnclassifiable/Attainment
Story CountyUnclassifiable/Attainment
Tama CountyUnclassifiable/Attainment
Taylor CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Van Buren CountyUnclassifiable/Attainment
Wapello CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Webster CountyUnclassifiable/Attainment
Winnebago CountyUnclassifiable/Attainment
Winneshiek CountyUnclassifiable/Attainment
Woodbury CountyUnclassifiable/Attainment
Worth CountyUnclassifiable/Attainment
Wright CountyUnclassifiable/Attainment

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 30 days after November 13, 2009, unless otherwise noted.

Iowa—NO2 (1971 Annual Standard)

Designated areaDoes not meet primary standardsCannot be classified or better than national standards
Entire StateX

Iowa—NO2 (2010 1-Hour Standard)

Designated areaDesignationa
Date1Type
Adair CountyUnclassifiable/Attainment.
Adams CountyUnclassifiable/Attainment.
Allamakee CountyUnclassifiable/Attainment.
Appanoose CountyUnclassifiable/Attainment.
Audubon CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Black Hawk CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Bremer CountyUnclassifiable/Attainment.
Buchanan CountyUnclassifiable/Attainment.
Buena Vista CountyUnclassifiable/Attainment.
Butler CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Cedar CountyUnclassifiable/Attainment.
Cerro Gordo CountyUnclassifiable/Attainment.
Cherokee CountyUnclassifiable/Attainment.
Chickasaw CountyUnclassifiable/Attainment.
Clarke CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clayton CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Dallas CountyUnclassifiable/Attainment.
Davis CountyUnclassifiable/Attainment.
Decatur CountyUnclassifiable/Attainment.
Delaware CountyUnclassifiable/Attainment.
Des Moines CountyUnclassifiable/Attainment.
Dickinson CountyUnclassifiable/Attainment.
Dubuque CountyUnclassifiable/Attainment.
Emmet CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Floyd CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Fremont CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Guthrie CountyUnclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Howard CountyUnclassifiable/Attainment.
Humboldt CountyUnclassifiable/Attainment.
Ida CountyUnclassifiable/Attainment.
Iowa CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Jones CountyUnclassifiable/Attainment.
Keokuk CountyUnclassifiable/Attainment.
Kossuth CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Linn CountyUnclassifiable/Attainment.
Louisa CountyUnclassifiable/Attainment.
Lucas CountyUnclassifiable/Attainment.
Lyon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Mahaska CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Mills CountyUnclassifiable/Attainment.
Mitchell CountyUnclassifiable/Attainment.
Monona CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Muscatine CountyUnclassifiable/Attainment.
O'Brien CountyUnclassifiable/Attainment.
Osceola CountyUnclassifiable/Attainment.
Page CountyUnclassifiable/Attainment.
Palo Alto CountyUnclassifiable/Attainment.
Plymouth CountyUnclassifiable/Attainment.
Pocahontas CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Pottawattamie CountyUnclassifiable/Attainment.
Poweshiek CountyUnclassifiable/Attainment.
Ringgold CountyUnclassifiable/Attainment.
Sac CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Sioux CountyUnclassifiable/Attainment.
Story CountyUnclassifiable/Attainment.
Tama CountyUnclassifiable/Attainment.
Taylor CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Van Buren CountyUnclassifiable/Attainment.
Wapello CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Winnebago CountyUnclassifiable/Attainment.
Winneshiek CountyUnclassifiable/Attainment.
Woodbury CountyUnclassifiable/Attainment.
Worth CountyUnclassifiable/Attainment.
Wright CountyUnclassifiable/Attainment.

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after October 31, 2011, unless otherwise noted.

Iowa—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area DesignationaCategory/classification
Date1Type Date1Type
StatewideUnclassifiable/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

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is June 15, 2004, unless otherwise noted.

Iowa—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated areaDesignationClassification
Date1TypeDate1Type
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

1This date is July 20, 2012, unless otherwise noted.

Iowa—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area1DesignationClassification
Date2TypeDateType
StatewideAttainment/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..

1Includes 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.

2This date is January 16, 2018, unless otherwise noted.

Iowa—2008 Lead NAAQS

Designated areaDesignation for the 2008 NAAQSa
Date1Type
Pottawattamie County, IA:
Pottawattamie County (part)10/4/2018Attainment.
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 StateUnclassifiable/Attainment.

aIncludes Indian Country located in each county or area, except as otherwise specified.

1December 31, 2011 unless otherwise noted.

[43 FR 8964, Mar. 3, 1978]

Editorial Note: For Federal Register citations affecting §81.316, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.

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