{"data":{"id":"us/40-cfr-81.316","jurisdiction":"us","citation":"40 CFR 81.316","heading":"Iowa.","body":"Iowa—TSP\nDesignated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards\nCentral portion of Waterloo X\nCedar Falls Township X\nEast Waterloo Township X\nRemainder of Black Hawk County X\nMason 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\nMason 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\nFalls Township X\nLake Township X\nLincoln Township X\nRemainder of Cerro Gordo County X\nAn area around downtown Clinton X\nComanche Township X\nRemainder of Clinton County X\nBurlington Township X\nRemainder of Des Moines County X\nIowa City Township X\nRemainder of Johnson County X\nAn area in and near Keokuk X\nJackson Township X\nJefferson Township X\nMadison Township X\nRemainder of Lee County X\nCedar Rapids—a portion of Linn County contained entirely within T 82 N., R 7 W.; and T 83 N., R 7 W X\nBertram Township X\nClinton Township X\nCollege Township X\nFairfax Township X\nMarion Township X\nMonroe Township X\nPutnam Township X\nRemainder of Linn County X\nThe central portion of Marshalltown X\nRemainder of Marshall County X\nThe central and southern portions of Muscatine X\nFruitland Township X\nSweetland Township X\nMontpelier Township X\nRemainder of Muscatine County X\nAn area of central Des Moines east of U.S. Highway 65 \u0026 69 (E. 14th Street) X\nPortions 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\nClay Township X\nDouglas Township X\nJefferson Township X\nRemainder of Polk County X\nThe western portion of Council Bluffs and Carter Lake X\nLake Township X\nLewis Township X\nRemainder of Pottawatomie County X\nPortions of Buffalo, Davenport, Bettendorf and Riverdale X\nRemainder of Scott County X\nCenter Township X\nRemainder of Wapello County X\nThe central portion Ft. Dodge X\nOtho Township X\nRemainder of Webster County X\nThe central and southern portions of Sioux City X\nLiberty Township X\nWoodbury Township X\nRemainder of Woodbury County X\nRemainder of State X\n1 EPA designation replaces State designation.\nIowa—1971 Sulfur Dioxide NAAQS\n[Primary and Secondary]\nDesignated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards\nEntire state X\nIowa—2010 Sulfur Dioxide NAAQS\n[Primary]\nDesignated area 1 Designation\nDate 2 Type\nMuscatine, IA 11/18/2025 Attainment.\nMuscatine County (part)\nSections 1-3, 10-15, 22-27, 34-36 of T77N, R3W (Lake Township)\nSections 1-3, 10-15, 22-27, 34-36 of T76N, R3W (Seventy-six Township)\nT77N, R2W (Bloomington Township)\nT76N, R2W (Fruitland Township)\nAll sections except 1, 12, 13, 24, 25, 36 of T77N, R1W (Sweetland Township)\nLinn County, IA Unclassifiable.\nLinn County\nWoodbury County, IA 9/12/2016 Unclassifiable.\nWoodbury County\nDes Moines County, IA 9/12/2016 Attainment/Unclassifiable.\nDes Moines County\nLouisa County, IA Attainment/Unclassifiable.\nLouisa County\nPottawattamie County, IA Attainment/Unclassifiable.\nPottawattamie County\nWapello County, IA 9/12/2016 Attainment/Unclassifiable.\nWapello County\nStatewide: Attainment/Unclassifiable.\nAdair County\nAdams County\nAllamakee County\nAppanoose County\nAudubon County\nBenton County\nBlack Hawk County\nBoone County\nBremer County\nBuchanan County\nBuena Vista County\nButler County\nCalhoun County\nCarroll County\nCass County\nCedar County\nCerro Gordo County\nCherokee County\nChickasaw County\nClarke County\nClay County\nClayton County\nClinton County\nCrawford County\nDallas County\nDavis County\nDecatur County\nDelaware County\nDickinson County\nDubuque County\nEmmet County\nFayette County\nFloyd County\nFranklin County\nFremont County\nGreene County\nGrundy County\nGuthrie County\nHamilton County\nHancock County\nHardin County\nHarrison County\nHenry County\nHoward County\nHumboldt County\nIda County\nIowa County\nJackson County\nJasper County\nJefferson County\nJohnson County\nJones County\nKeokuk County\nKossuth County\nLee County\nLucas County\nLyon County\nMadison County\nMahaska County\nMarion County\nMarshall County\nMills County\nMitchell County\nMonona County\nMonroe County\nMontgomery County\nMuscatine County (portion of Muscatine County not designated Nonattainment on 10/4/2013)\nO'Brien County\nOsceola County\nPage County\nPalo Alto County\nPlymouth County\nPocahontas County\nPolk County\nPoweshiek County\nRinggold County\nSac County\nScott County\nShelby County\nSioux County\nStory County\nTama County\nTaylor County\nUnion County\nVan Buren County\nWarren County\nWashington County\nWayne County\nWebster County\nWinnebago County\nWinneshiek County\nWorth County\nWright County\n1 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.\n2 This date is April 9, 2018, unless otherwise noted.\nIowa—Carbon Monoxide\nDesignated Area Designation Classification\nDate 1 Type Date 1 Type\nStatewide Unclassifiable/Attainment\nAdair County\nAdams County\nAllamakee County\nAppanoose County\nAudubon County\nBenton County\nBlack Hawk County\nBoone County\nBremer County\nBuchanan County\nBuena Vista County\nButler County\nCalhoun County\nCarroll County\nCass County\nCedar County\nCerro Gordo County\nCherokee County\nChickasaw County\nClarke County\nClay County\nClayton County\nClinton County\nCrawford County\nDallas County\nDavis County\nDecatur County\nDelaware County\nDes Moines County\nDickinson County\nDubuque County\nEmmet County\nFayette County\nFloyd County\nFranklin County\nFremont County\nGreene County\nGrundy County\nGuthrie County\nHamilton County\nHancock County\nHardin County\nHarrison County\nHenry County\nHoward County\nHumboldt County\nIda County\nIowa County\nJackson County\nJasper County\nJefferson County\nJohnson County\nJones County\nKeokuk County\nKossuth County\nLee County\nLinn County\nLouisa County\nLucas County\nLyon County\nMadison County\nMahaska County\nMarion County\nMarshall County\nMills County\nMitchell County\nMonona County\nMonroe County\nMontgomery County\nMuscatine County\nO'Brien County\nOsceola County\nPage County\nPalo Alto County\nPlymouth County\nPocahontas County\nPolk County\nPottawattamie County\nPoweshiek County\nRinggold County\nSac County\nScott County\nShelby County\nSioux County\nStory County\nTama County\nTaylor County\nUnion County\nVan Buren County\nWapello County\nWarren County\nWashington County\nWayne County\nWebster County\nWinnebago County\nWinneshiek County\nWoodbury County\nWorth County\nWright County\n1 This date is November 15, 1990, unless otherwise noted.\nIowa—Ozone (1-Hour Standard)2\nDesignated area Designation Classification\nDate1 Type Date1 Type\nStatewide Unclassifiable/Attainment\nAdair County\nAdams County\nAllamakee County\nAppanoose County\nAudubon County\nBenton County\nBlack Hawk County\nBoone County\nBremer County\nBuchanan County\nBuena Vista County\nButler County\nCalhoun County\nCarroll County\nCass County\nCedar County\nCerro Gordo County\nCherokee County\nChickasaw County\nClarke County\nClay County\nClayton County\nClinton County\nCrawford County\nDallas County\nDavis County\nDecatur County\nDelaware County\nDes Moines County\nDickinson County\nDubuque County\nEmmet County\nFayette County\nFloyd County\nFranklin County\nFremont County\nGreene County\nGrundy County\nGuthrie County\nHamilton County\nHancock County\nHardin County\nHarrison County\nHenry County\nHoward County\nHumboldt County\nIda County\nIowa County\nJackson County\nJasper County\nJefferson County\nJohnson County\nJones County\nKeokuk County\nKossuth County\nLee County\nLinn County\nLouisa County\nLucas County\nLyon County\nMadison County\nMahaska County\nMarion County\nMarshall County\nMills County\nMitchell County\nMonona County\nMonroe County\nMontgomery County\nMuscatine County\nO'Brien County\nOsceola County\nPage County\nPalo Alto County\nPlymouth County\nPocahontas County\nPolk County\nPottawattamie County\nPoweshiek County\nRinggold County\nSac County\nScott County\nShelby County\nSioux County\nStory County\nTama County\nTaylor County\nUnion County\nVan Buren County\nWapello County\nWarren County\nWashington County\nWayne County\nWebster County\nWinnebago County\nWinneshiek County\nWoodbury County\nWorth County\nWright County\n1 This date is October 18, 2000, unless otherwise noted.\n2 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Iowa.\nIowa—1997 Annual PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designation a Classification\nDate 1 Type Date Type\nStatewide:\nAdair County Unclassifiable/Attainment.\nAdams County Unclassifiable/Attainment.\nAllamakee County Unclassifiable/Attainment.\nAppanoose County Unclassifiable/Attainment.\nAudubon County Unclassifiable/Attainment.\nBenton County Unclassifiable/Attainment.\nBlack Hawk County Unclassifiable/Attainment.\nBoone County Unclassifiable/Attainment.\nBremer County Unclassifiable/Attainment.\nBuchanan County Unclassifiable/Attainment.\nBuena Vista County Unclassifiable/Attainment.\nButler County Unclassifiable/Attainment.\nCalhoun County Unclassifiable/Attainment.\nCarroll County Unclassifiable/Attainment.\nCass County Unclassifiable/Attainment.\nCedar County Unclassifiable/Attainment.\nCerro Gordo County Unclassifiable/Attainment.\nCherokee County Unclassifiable/Attainment.\nChickasaw County Unclassifiable/Attainment.\nClarke County Unclassifiable/Attainment.\nClay County Unclassifiable/Attainment.\nClayton County Unclassifiable/Attainment.\nClinton County Unclassifiable/Attainment.\nCrawford County Unclassifiable/Attainment.\nDallas County Unclassifiable/Attainment.\nDavis County Unclassifiable/Attainment.\nDecatur County Unclassifiable/Attainment.\nDelaware County Unclassifiable/Attainment.\nDes Moines County Unclassifiable/Attainment.\nDickinson County Unclassifiable/Attainment.\nDubuque County Unclassifiable/Attainment.\nEmmet County Unclassifiable/Attainment.\nFayette County Unclassifiable/Attainment.\nFloyd County Unclassifiable/Attainment.\nFranklin County Unclassifiable/Attainment.\nFremont County Unclassifiable/Attainment.\nGreene County Unclassifiable/Attainment.\nGrundy County Unclassifiable/Attainment.\nGuthrie County Unclassifiable/Attainment.\nHamilton County Unclassifiable/Attainment.\nHancock County Unclassifiable/Attainment.\nHardin County Unclassifiable/Attainment.\nHarrison County Unclassifiable/Attainment.\nHenry County Unclassifiable/Attainment.\nHoward County Unclassifiable/Attainment.\nHumboldt County Unclassifiable/Attainment.\nIda County Unclassifiable/Attainment.\nIowa County Unclassifiable/Attainment.\nJackson County Unclassifiable/Attainment.\nJasper County Unclassifiable/Attainment.\nJefferson County Unclassifiable/Attainment.\nJohnson County Unclassifiable/Attainment.\nJones County Unclassifiable/Attainment.\nKeokuk County Unclassifiable/Attainment.\nKossuth County Unclassifiable/Attainment.\nLee County Unclassifiable/Attainment.\nLinn County Unclassifiable/Attainment.\nLouisa County Unclassifiable/Attainment.\nLucas County Unclassifiable/Attainment.\nLyon County Unclassifiable/Attainment.\nMadison County Unclassifiable/Attainment.\nMahaska County Unclassifiable/Attainment.\nMarion County Unclassifiable/Attainment.\nMarshall County Unclassifiable/Attainment.\nMills County Unclassifiable/Attainment.\nMitchell County Unclassifiable/Attainment.\nMonona County Unclassifiable/Attainment.\nMonroe County Unclassifiable/Attainment.\nMontgomery County Unclassifiable/Attainment.\nMuscatine County Unclassifiable/Attainment.\nO'Brien County Unclassifiable/Attainment.\nOsceola County Unclassifiable/Attainment.\nPage County Unclassifiable/Attainment.\nPalo Alto County Unclassifiable/Attainment.\nPlymouth County Unclassifiable/Attainment.\nPocahontas County Unclassifiable/Attainment.\nPolk County Unclassifiable/Attainment.\nPottawattamie County Unclassifiable/Attainment.\nPoweshiek County Unclassifiable/Attainment.\nRinggold County Unclassifiable/Attainment.\nSac County Unclassifiable/Attainment.\nScott County Unclassifiable/Attainment.\nShelby County Unclassifiable/Attainment.\nSioux County Unclassifiable/Attainment.\nStory County Unclassifiable/Attainment.\nTama County Unclassifiable/Attainment.\nTaylor County Unclassifiable/Attainment.\nUnion County Unclassifiable/Attainment.\nVan Buren County Unclassifiable/Attainment.\nWapello County Unclassifiable/Attainment.\nWarren County Unclassifiable/Attainment.\nWashington County Unclassifiable/Attainment.\nWayne County Unclassifiable/Attainment.\nWebster County Unclassifiable/Attainment.\nWinnebago County Unclassifiable/Attainment.\nWinneshiek County Unclassifiable/Attainment.\nWoodbury County Unclassifiable/Attainment.\nWorth County Unclassifiable/Attainment.\nWright County Unclassifiable/Attainment.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 90 days after January 5, 2005, unless otherwise noted.\nIowa—2012 Annual PM2.5 NAAQS\n[Primary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nStatewide:\nAdair County Unclassifiable/Attainment\nAdams County Unclassifiable/Attainment\nAllamakee County Unclassifiable/Attainment\nAppanoose County Unclassifiable/Attainment\nAudubon County Unclassifiable/Attainment\nBenton County Unclassifiable/Attainment\nBlack Hawk County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nBremer County Unclassifiable/Attainment\nBuchanan County Unclassifiable/Attainment\nBuena Vista County Unclassifiable/Attainment\nButler County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nCass County Unclassifiable/Attainment\nCedar County Unclassifiable/Attainment\nCerro Gordo County Unclassifiable/Attainment\nCherokee County Unclassifiable/Attainment\nChickasaw County Unclassifiable/Attainment\nClarke County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nClayton County Unclassifiable/Attainment\nClinton County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDavis County Unclassifiable/Attainment\nDecatur County Unclassifiable/Attainment\nDelaware County Unclassifiable/Attainment\nDes Moines County Unclassifiable/Attainment\nDickinson County Unclassifiable/Attainment\nDubuque County Unclassifiable/Attainment\nEmmet County Unclassifiable/Attainment\nFayette County Unclassifiable/Attainment\nFloyd County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFremont County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nGrundy County Unclassifiable/Attainment\nGuthrie County Unclassifiable/Attainment\nHamilton County Unclassifiable/Attainment\nHancock County Unclassifiable/Attainment\nHardin County Unclassifiable/Attainment\nHarrison County Unclassifiable/Attainment\nHenry County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nHumboldt County Unclassifiable/Attainment\nIda County Unclassifiable/Attainment\nIowa County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nJasper County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nJones County Unclassifiable/Attainment\nKeokuk County Unclassifiable/Attainment\nKossuth County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nLinn County Unclassifiable/Attainment\nLouisa County Unclassifiable/Attainment\nLucas County Unclassifiable/Attainment\nLyon County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMahaska County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMarshall County Unclassifiable/Attainment\nMills County Unclassifiable/Attainment\nMitchell County Unclassifiable/Attainment\nMonona County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nMuscatine County Unclassifiable/Attainment\nO'Brien County Unclassifiable/Attainment\nOsceola County Unclassifiable/Attainment\nPage County Unclassifiable/Attainment\nPalo Alto County Unclassifiable/Attainment\nPlymouth County Unclassifiable/Attainment\nPocahontas County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nPottawattamie County Unclassifiable/Attainment\nPoweshiek County Unclassifiable/Attainment\nRinggold County Unclassifiable/Attainment\nSac County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nShelby County Unclassifiable/Attainment\nSioux County Unclassifiable/Attainment\nStory County Unclassifiable/Attainment\nTama County Unclassifiable/Attainment\nTaylor County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nWapello County Unclassifiable/Attainment\nWarren County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nWayne County Unclassifiable/Attainment\nWebster County Unclassifiable/Attainment\nWinnebago County Unclassifiable/Attainment\nWinneshiek County Unclassifiable/Attainment\nWoodbury County Unclassifiable/Attainment\nWorth County Unclassifiable/Attainment\nWright County Unclassifiable/Attainment\n1 Includes areas of Indian country located in each county or area, except as otherwise specified.\n2 This date is April 15, 2015, unless otherwise noted.\nIowa—1997 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nStatewide:\nAdair County Unclassifiable/Attainment\nAdams County Unclassifiable/Attainment\nAllamakee County Unclassifiable/Attainment\nAppanoose County Unclassifiable/Attainment\nAudubon County Unclassifiable/Attainment\nBenton County Unclassifiable/Attainment\nBlack Hawk County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nBremer County Unclassifiable/Attainment\nBuchanan County Unclassifiable/Attainment\nBuena Vista County Unclassifiable/Attainment\nButler County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nCass County Unclassifiable/Attainment\nCedar County Unclassifiable/Attainment\nCerro Gordo County Unclassifiable/Attainment\nCherokee County Unclassifiable/Attainment\nChickasaw County Unclassifiable/Attainment\nClarke County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nClayton County Unclassifiable/Attainment\nClinton County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDavis County Unclassifiable/Attainment\nDecatur County Unclassifiable/Attainment\nDelaware County Unclassifiable/Attainment\nDes Moines County Unclassifiable/Attainment\nDickinson County Unclassifiable/Attainment\nDubuque County Unclassifiable/Attainment\nEmmet County Unclassifiable/Attainment\nFayette County Unclassifiable/Attainment\nFloyd County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFremont County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nGrundy County Unclassifiable/Attainment\nGuthrie County Unclassifiable/Attainment\nHamilton County Unclassifiable/Attainment\nHancock County Unclassifiable/Attainment\nHardin County Unclassifiable/Attainment\nHarrison County Unclassifiable/Attainment\nHenry County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nHumboldt County Unclassifiable/Attainment\nIda County Unclassifiable/Attainment\nIowa County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nJasper County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nJones County Unclassifiable/Attainment\nKeokuk County Unclassifiable/Attainment\nKossuth County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nLinn County Unclassifiable/Attainment\nLouisa County Unclassifiable/Attainment\nLucas County Unclassifiable/Attainment\nLyon County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMahaska County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMarshall County Unclassifiable/Attainment\nMills County Unclassifiable/Attainment\nMitchell County Unclassifiable/Attainment\nMonona County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nMuscatine County Unclassifiable/Attainment\nO'Brien County Unclassifiable/Attainment\nOsceola County Unclassifiable/Attainment\nPage County Unclassifiable/Attainment\nPalo Alto County Unclassifiable/Attainment\nPlymouth County Unclassifiable/Attainment\nPocahontas County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nPottawattamie County Unclassifiable/Attainment\nPoweshiek County Unclassifiable/Attainment\nRinggold County Unclassifiable/Attainment\nSac County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nShelby County Unclassifiable/Attainment\nSioux County Unclassifiable/Attainment\nStory County Unclassifiable/Attainment\nTama County Unclassifiable/Attainment\nTaylor County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nWapello County Unclassifiable/Attainment\nWarren County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nWayne County Unclassifiable/Attainment\nWebster County Unclassifiable/Attainment\nWinnebago County Unclassifiable/Attainment\nWinneshiek County Unclassifiable/Attainment\nWoodbury County Unclassifiable/Attainment\nWorth County Unclassifiable/Attainment\nWright County Unclassifiable/Attainment\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 90 days after January 5, 2005, unless otherwise noted.\nIowa—2006 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nStatewide:\nAdair County Unclassifiable/Attainment\nAdams County Unclassifiable/Attainment\nAllamakee County Unclassifiable/Attainment\nAppanoose County Unclassifiable/Attainment\nAudubon County Unclassifiable/Attainment\nBenton County Unclassifiable/Attainment\nBlack Hawk County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nBremer County Unclassifiable/Attainment\nBuchanan County Unclassifiable/Attainment\nBuena Vista County Unclassifiable/Attainment\nButler County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nCass County Unclassifiable/Attainment\nCedar County Unclassifiable/Attainment\nCerro Gordo County Unclassifiable/Attainment\nCherokee County Unclassifiable/Attainment\nChickasaw County Unclassifiable/Attainment\nClarke County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nClayton County Unclassifiable/Attainment\nClinton County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDavis County Unclassifiable/Attainment\nDecatur County Unclassifiable/Attainment\nDelaware County Unclassifiable/Attainment\nDes Moines County Unclassifiable/Attainment\nDickinson County Unclassifiable/Attainment\nDubuque County Unclassifiable/Attainment\nEmmet County Unclassifiable/Attainment\nFayette County Unclassifiable/Attainment\nFloyd County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFremont County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nGrundy County Unclassifiable/Attainment\nGuthrie County Unclassifiable/Attainment\nHamilton County Unclassifiable/Attainment\nHancock County Unclassifiable/Attainment\nHardin County Unclassifiable/Attainment\nHarrison County Unclassifiable/Attainment\nHenry County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nHumboldt County Unclassifiable/Attainment\nIda County Unclassifiable/Attainment\nIowa County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nJasper County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nJones County Unclassifiable/Attainment\nKeokuk County Unclassifiable/Attainment\nKossuth County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nLinn County Unclassifiable/Attainment\nLouisa County Unclassifiable/Attainment\nLucas County Unclassifiable/Attainment\nLyon County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMahaska County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMarshall County Unclassifiable/Attainment\nMills County Unclassifiable/Attainment\nMitchell County Unclassifiable/Attainment\nMonona County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nMuscatine County Unclassifiable/Attainment\nO'Brien County Unclassifiable/Attainment\nOsceola County Unclassifiable/Attainment\nPage County Unclassifiable/Attainment\nPalo Alto County Unclassifiable/Attainment\nPlymouth County Unclassifiable/Attainment\nPocahontas County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nPottawattamie County Unclassifiable/Attainment\nPoweshiek County Unclassifiable/Attainment\nRinggold County Unclassifiable/Attainment\nSac County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nShelby County Unclassifiable/Attainment\nSioux County Unclassifiable/Attainment\nStory County Unclassifiable/Attainment\nTama County Unclassifiable/Attainment\nTaylor County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nWapello County Unclassifiable/Attainment\nWarren County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nWayne County Unclassifiable/Attainment\nWebster County Unclassifiable/Attainment\nWinnebago County Unclassifiable/Attainment\nWinneshiek County Unclassifiable/Attainment\nWoodbury County Unclassifiable/Attainment\nWorth County Unclassifiable/Attainment\nWright County Unclassifiable/Attainment\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 30 days after November 13, 2009, unless otherwise noted.\nIowa—NO2 (1971 Annual Standard)\nDesignated area Does not meet primary standards Cannot be classified or better than national standards\nEntire State X\nIowa—NO2 (2010 1-Hour Standard)\nDesignated area Designation a\nDate 1 Type\nAdair County Unclassifiable/Attainment.\nAdams County Unclassifiable/Attainment.\nAllamakee County Unclassifiable/Attainment.\nAppanoose County Unclassifiable/Attainment.\nAudubon County Unclassifiable/Attainment.\nBenton County Unclassifiable/Attainment.\nBlack Hawk County Unclassifiable/Attainment.\nBoone County Unclassifiable/Attainment.\nBremer County Unclassifiable/Attainment.\nBuchanan County Unclassifiable/Attainment.\nBuena Vista County Unclassifiable/Attainment.\nButler County Unclassifiable/Attainment.\nCalhoun County Unclassifiable/Attainment.\nCarroll County Unclassifiable/Attainment.\nCass County Unclassifiable/Attainment.\nCedar County Unclassifiable/Attainment.\nCerro Gordo County Unclassifiable/Attainment.\nCherokee County Unclassifiable/Attainment.\nChickasaw County Unclassifiable/Attainment.\nClarke County Unclassifiable/Attainment.\nClay County Unclassifiable/Attainment.\nClayton County Unclassifiable/Attainment.\nClinton County Unclassifiable/Attainment.\nCrawford County Unclassifiable/Attainment.\nDallas County Unclassifiable/Attainment.\nDavis County Unclassifiable/Attainment.\nDecatur County Unclassifiable/Attainment.\nDelaware County Unclassifiable/Attainment.\nDes Moines County Unclassifiable/Attainment.\nDickinson County Unclassifiable/Attainment.\nDubuque County Unclassifiable/Attainment.\nEmmet County Unclassifiable/Attainment.\nFayette County Unclassifiable/Attainment.\nFloyd County Unclassifiable/Attainment.\nFranklin County Unclassifiable/Attainment.\nFremont County Unclassifiable/Attainment.\nGreene County Unclassifiable/Attainment.\nGrundy County Unclassifiable/Attainment.\nGuthrie County Unclassifiable/Attainment.\nHamilton County Unclassifiable/Attainment.\nHancock County Unclassifiable/Attainment.\nHardin County Unclassifiable/Attainment.\nHarrison County Unclassifiable/Attainment.\nHenry County Unclassifiable/Attainment.\nHoward County Unclassifiable/Attainment.\nHumboldt County Unclassifiable/Attainment.\nIda County Unclassifiable/Attainment.\nIowa County Unclassifiable/Attainment.\nJackson County Unclassifiable/Attainment.\nJasper County Unclassifiable/Attainment.\nJefferson County Unclassifiable/Attainment.\nJohnson County Unclassifiable/Attainment.\nJones County Unclassifiable/Attainment.\nKeokuk County Unclassifiable/Attainment.\nKossuth County Unclassifiable/Attainment.\nLee County Unclassifiable/Attainment.\nLinn County Unclassifiable/Attainment.\nLouisa County Unclassifiable/Attainment.\nLucas County Unclassifiable/Attainment.\nLyon County Unclassifiable/Attainment.\nMadison County Unclassifiable/Attainment.\nMahaska County Unclassifiable/Attainment.\nMarion County Unclassifiable/Attainment.\nMarshall County Unclassifiable/Attainment.\nMills County Unclassifiable/Attainment.\nMitchell County Unclassifiable/Attainment.\nMonona County Unclassifiable/Attainment.\nMonroe County Unclassifiable/Attainment.\nMontgomery County Unclassifiable/Attainment.\nMuscatine County Unclassifiable/Attainment.\nO'Brien County Unclassifiable/Attainment.\nOsceola County Unclassifiable/Attainment.\nPage County Unclassifiable/Attainment.\nPalo Alto County Unclassifiable/Attainment.\nPlymouth County Unclassifiable/Attainment.\nPocahontas County Unclassifiable/Attainment.\nPolk County Unclassifiable/Attainment.\nPottawattamie County Unclassifiable/Attainment.\nPoweshiek County Unclassifiable/Attainment.\nRinggold County Unclassifiable/Attainment.\nSac County Unclassifiable/Attainment.\nScott County Unclassifiable/Attainment.\nShelby County Unclassifiable/Attainment.\nSioux County Unclassifiable/Attainment.\nStory County Unclassifiable/Attainment.\nTama County Unclassifiable/Attainment.\nTaylor County Unclassifiable/Attainment.\nUnion County Unclassifiable/Attainment.\nVan Buren County Unclassifiable/Attainment.\nWapello County Unclassifiable/Attainment.\nWarren County Unclassifiable/Attainment.\nWashington County Unclassifiable/Attainment.\nWayne County Unclassifiable/Attainment.\nWebster County Unclassifiable/Attainment.\nWinnebago County Unclassifiable/Attainment.\nWinneshiek County Unclassifiable/Attainment.\nWoodbury County Unclassifiable/Attainment.\nWorth County Unclassifiable/Attainment.\nWright County Unclassifiable/Attainment.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is 90 days after October 31, 2011, unless otherwise noted.\nIowa—1997 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation a Category/classification\nDate 1 Type Date 1 Type\nStatewide Unclassifiable/Attainment\nAdair County\nAdams County\nAllamakee County\nAppanoose County\nAudubon County\nBenton County\nBlack Hawk County\nBoone County\nBremer County\nBuchanan County\nBuena Vista County\nButler County\nCalhoun County\nCarroll County\nCass County\nCedar County\nCerro Gordo County\nCherokee County\nChickasaw County\nClarke County\nClay County\nClayton County\nClinton County\nCrawford County\nDallas County\nDavis County\nDecatur County\nDelaware County\nDes Moines County\nDickinson County\nDubuque County\nEmmet County\nFayette County\nFloyd County\nFranklin County\nFremont County\nGreene County\nGrundy County\nGuthrie County\nHamilton County\nHancock County\nHardin County\nHarrison County\nHenry County\nHoward County\nHumboldt County\nIda County\nIowa County\nJackson County\nJasper County\nJefferson County\nJohnson County\nJones County\nKeokuk County\nKossuth County\nLee County\nLinn County\nLouisa County\nLucas County\nLyon County\nMadison County\nMahaska County\nMarion County\nMarshall County\nMills County\nMitchell County\nMonona County\nMonroe County\nMontgomery County\nMuscatine County\nO'Brien County\nOsceola County\nPage County\nPalo Alto County\nPlymouth County\nPocahontas County\nPolk County\nPottawattamie County\nPoweshiek County\nRinggold County\nSac County\nScott County\nShelby County\nSioux County\nStory County\nTama County\nTaylor County\nUnion County\nVan Buren County\nWapello County\nWarren County\nWashington County\nWayne County\nWebster County\nWinnebago County\nWinneshiek County\nWoodbury County\nWorth County\nWright County\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is June 15, 2004, unless otherwise noted.\nIowa—2008 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nStatewide and Any Areas of Indian Country: Unclassifiable/Attainment\nAdair County\nAdams County\nAllamakee County\nAppanoose County\nAudubon County\nBenton County\nBlack Hawk County\nBoone County\nBremer County\nBuchanan County\nBuena Vista County\nButler County\nCalhoun County\nCarroll County\nCass County\nCedar County\nCerro Gordo County\nCherokee County\nChickasaw County\nClarke County\nClay County\nClayton County\nClinton County\nCrawford County\nDallas County\nDavis County\nDecatur County\nDelaware County\nDes Moines County\nDickinson County\nDubuque County\nEmmet County\nFayette County\nFloyd County\nFranklin County\nFremont County\nGreene County\nGrundy County\nGuthrie County\nHamilton County\nHancock County\nHardin County\nHarrison County\nHenry County\nHoward County\nHumboldt County\nIda County\nIowa County\nJackson County\nJasper County\nJefferson County\nJohnson County\nJones County\nKeokuk County\nKossuth County\nLee County\nLinn County\nLouisa County\nLucas County\nLyon County\nMadison County\nMahaska County\nMarion County\nMarshall County\nMills County\nMitchell County\nMonona County\nMonroe County\nMontgomery County\nMuscatine County\nO'Brien County\nOsceola County\nPage County\nPalo Alto County\nPlymouth County\nPocahontas County\nPolk County\nPottawattamie County\nPoweshiek County\nRinggold County\nSac County\nScott County\nShelby County\nSioux County\nStory County\nTama County\nTaylor County\nUnion County\nVan Buren County\nWapello County\nWarren County\nWashington County\nWayne County\nWebster County\nWinnebago County\nWinneshiek County\nWoodbury County\nWorth County\nWright County\n1 This date is July 20, 2012, unless otherwise noted.\nIowa—2015 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area 1 Designation Classification\nDate 2 Type Date Type\nStatewide Attainment/Unclassifiable\nAdair County.\nAdams County.\nAllamakee County.\nAppanoose County.\nAudubon County.\nBenton County.\nBlack Hawk County.\nBoone County.\nBremer County.\nBuchanan County.\nBuena Vista County.\nButler County.\nCalhoun County.\nCarroll County.\nCass County.\nCedar County.\nCerro Gordo County.\nCherokee County.\nChickasaw County.\nClarke County.\nClay County.\nClayton County.\nClinton County.\nCrawford County.\nDallas County.\nDavis County.\nDecatur County.\nDelaware County.\nDes Moines County.\nDickinson County.\nDubuque County.\nEmmet County.\nFayette County.\nFloyd County.\nFranklin County.\nFremont County.\nGreene County.\nGrundy County.\nGuthrie County.\nHamilton County.\nHancock County.\nHardin County.\nHarrison County.\nHenry County.\nHoward County.\nHumboldt County.\nIda County.\nIowa County.\nJackson County.\nJasper County.\nJefferson County.\nJohnson County.\nJones County.\nKeokuk County.\nKossuth County.\nLee County.\nLinn County.\nLouisa County.\nLucas County.\nLyon County.\nMadison County.\nMahaska County.\nMarion County.\nMarshall County.\nMills County.\nMitchell County.\nMonona County.\nMonroe County.\nMontgomery County.\nMuscatine County.\nO'Brien County.\nOsceola County.\nPage County.\nPalo Alto County.\nPlymouth County.\nPocahontas County.\nPolk County.\nPottawattamie County.\nPoweshiek County.\nRinggold County.\nSac County.\nScott County.\nShelby County.\nSioux County.\nStory County.\nTama County.\nTaylor County.\nUnion County.\nVan Buren County.\nWapello County.\nWarren County.\nWashington County.\nWayne County.\nWebster County.\nWinnebago County.\nWinneshiek County.\nWoodbury County.\nWorth County.\nWright County. .\n1 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.\n2 This date is January 16, 2018, unless otherwise noted.\nIowa—2008 Lead NAAQS\nDesignated area Designation for the 2008 NAAQS a\nDate 1 Type\nPottawattamie County, IA:\nPottawattamie County (part) 10/4/2018 Attainment.\nArea 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\nRest of State Unclassifiable/Attainment.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 December 31, 2011 unless otherwise noted.","path":["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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"b2613340e207e9aede05873e1ab774a3a14e8537d6fccd4338abd064b4c6ab48","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.315","next":"us/40-cfr-81.317"},"notice":"GroundRules: Original legal text. Not legal advice."}