{"data":{"id":"us/40-cfr-81.304","jurisdiction":"us","citation":"40 CFR 81.304","heading":"Arkansas.","body":"Arkansas—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\nAQCR 016 X\nAQCR 017 X\nAQCR 018 X\nAQCR 019 X\nAQCR 020 X\nAQCR 021 X\nAQCR 022 X\nArkansas—2010 Sulfur Dioxide NAAQS\n[Primary]\nDesignated area 1 Designation\nDate 2 Type\nArkansas County Attainment/Unclassifiable.\nAshley County Attainment/Unclassifiable.\nBaxter County Attainment/Unclassifiable.\nBenton County Attainment/Unclassifiable.\nBoone County Attainment/Unclassifiable.\nBradley County Attainment/Unclassifiable.\nCalhoun County Attainment/Unclassifiable.\nCarroll County Attainment/Unclassifiable.\nChicot County Attainment/Unclassifiable.\nClark County Attainment/Unclassifiable.\nClay County Attainment/Unclassifiable.\nCleburne County Attainment/Unclassifiable.\nCleveland County Attainment/Unclassifiable.\nColumbia County Attainment/Unclassifiable.\nConway County Attainment/Unclassifiable.\nCraighead County Attainment/Unclassifiable.\nCrawford County Attainment/Unclassifiable.\nCrittenden County Attainment/Unclassifiable.\nCross County Attainment/Unclassifiable.\nDallas County Attainment/Unclassifiable.\nDesha County Attainment/Unclassifiable.\nDrew County Attainment/Unclassifiable.\nFaulkner County Attainment/Unclassifiable.\nFranklin County Attainment/Unclassifiable.\nFulton County Attainment/Unclassifiable.\nGarland County Attainment/Unclassifiable.\nGrant County Attainment/Unclassifiable.\nGreene County Attainment/Unclassifiable.\nHempstead County Attainment/Unclassifiable.\nHot Spring County Attainment/Unclassifiable.\nHoward County Attainment/Unclassifiable.\nIndependence County 4/12/2019 Attainment/Unclassifiable.\nIzard County Attainment/Unclassifiable.\nJackson County Attainment/Unclassifiable.\nJefferson County 9/12/2016 Attainment/Unclassifiable.\nJohnson County Attainment/Unclassifiable.\nLafayette County Attainment/Unclassifiable.\nLawrence County Attainment/Unclassifiable.\nLee County Attainment/Unclassifiable.\nLincoln County Attainment/Unclassifiable.\nLittle River County Attainment/Unclassifiable.\nLogan County Attainment/Unclassifiable.\nLonoke County Attainment/Unclassifiable.\nMadison County Attainment/Unclassifiable.\nMarion County Attainment/Unclassifiable.\nMiller County Attainment/Unclassifiable.\nMississippi County Attainment/Unclassifiable.\nMonroe County Attainment/Unclassifiable.\nMontgomery County Attainment/Unclassifiable.\nNevada County Attainment/Unclassifiable.\nNewton County Attainment/Unclassifiable.\nOuachita County Attainment/Unclassifiable.\nPerry County Attainment/Unclassifiable.\nPhillips County Attainment/Unclassifiable.\nPike County Attainment/Unclassifiable.\nPoinsett County Attainment/Unclassifiable.\nPolk County Attainment/Unclassifiable.\nPope County Attainment/Unclassifiable.\nPrairie County Attainment/Unclassifiable.\nPulaski County Attainment/Unclassifiable.\nRandolph County Attainment/Unclassifiable.\nSt. Francis County Attainment/Unclassifiable.\nSaline County Attainment/Unclassifiable.\nScott County Attainment/Unclassifiable.\nSearcy County Attainment/Unclassifiable.\nSebastian County Attainment/Unclassifiable.\nSevier County Attainment/Unclassifiable.\nSharp County Attainment/Unclassifiable.\nStone County Attainment/Unclassifiable.\nUnion County Attainment/Unclassifiable.\nVan Buren County Attainment/Unclassifiable.\nWashington County Attainment/Unclassifiable.\nWhite County Attainment/Unclassifiable.\nWoodruff County Attainment/Unclassifiable.\nYell County Attainment/Unclassifiable.\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.\nArkansas—Carbon Monoxide\nDesignated Area Designation Classification\nDate 1 Type Date 1 Type\nAQCR 016 Central Arkansas Intrastate Unclassifiable/Attainment\nChicot County\nClark County\nCleveland County\nConway County\nDallas County\nDesha County\nDrew County\nFaulkner County\nGarland County\nGrant County\nHot Spring County\nJefferson County\nLincoln County\nLonoke County\nPerry County\nPope County\nPulaski County\nSaline County\nYell County\nAQCR 017 Metropolitan Fort Smith Interstate Unclassifiable/Attainment\nBenton County\nCrawford County\nSebastian County\nWashington County\nAQCR 018 Metropolitan Memphis Interstate Unclassifiable/Attainment\nCrittenden County\nAQCR 019 Monroe (Louisiana)-El Dorado Interstate Unclassifiable/Attainment\nAshley County\nBradley County\nCalhoun County\nNevada County\nOuachita County\nUnion County\nAQCR 020 Northeast Arkansas Intrastate Unclassifiable/Attainment\nArkansas County\nClay County\nCraighead County\nCross County\nGreene County\nIndependence County\nJackson County\nLawrence County\nLee County\nMississippi County\nMonroe County\nPhillips County\nPoinsett County\nPrairie County\nRandolph County\nSharp County\nSt. Francis County\nWhite County\nWoodruff County\nAQCR 021 Northwest Arkansas Intrastate Unclassifiable/Attainment\nBaxter County\nBoone County\nCarroll County\nCleburne County\nFranklin County\nFulton County\nIzard County\nJohnson County\nLogan County\nMadison County\nMarion County\nMontgomery County\nNewton County\nPike County\nPolk County\nScott County\nSearcy County\nStone County\nVan Buren County\nAQCR 022 Shreveport-Texarkana-Tyler Interstate Unclassifiable/Attainment\nColumbia County\nHempstead County\nHoward County\nLafayette County\nLittle River County\nMiller County\nSevier County\n1 This date is November 15, 1990, unless otherwise noted.\nArkansas—Ozone (1-Hour Standard)2\nDesignated area Designation Classification\nDate1 Type Date1 Type\nAQCR 016 Central Arkansas Intrastate (part) Pulaski County Unclassifiable/Attainment\nAQCR 016 Central Arkansas Intrastate (Remainder of) Unclassifiable/Attainment\nChicot County\nClark County\nCleveland County\nConway County\nDallas County\nDesha County\nDrew County\nFaulkner County\nGarland County\nGrant County\nHot Spring County\nJefferson County\nLincoln County\nLonoke County\nPerry County\nPope County\nSaline County\nYell County\nAQCR 017 Metropolitan Fort Smith Interstate Unclassifiable/Attainment\nBenton County\nCrawford County\nSebastian County\nWashington County\nAQCR 018 Metropolitan Memphis Interstate Unclassifiable/Attainment\nCrittenden County\nAQCR 019 Monroe-El Dorado Interstate Unclassifiable/Attainment\nAshley County\nBradley County\nCalhoun County\nNevada County\nOuachita County\nUnion County\nAQCR 020 Northeast Arkansas Intrastate Unclassifiable/Attainment\nArkansas County\nClay County\nCraighead County\nCross County\nGreene County\nIndependence County\nJackson County\nLawrence County\nLee County\nMississippi County\nMonroe County\nPhillips County\nPoinsett County\nPrairie County\nRandolph County\nSharp County\nSt. Francis County\nWhite County\nWoodruff County\nAQCR 021 Northwest Arkansas Intrastate Unclassifiable/Attainment\nBaxter County\nBoone County\nCarroll County\nCleburne County\nFranklin County\nFulton County\nIzard County\nJohnson County\nLogan County\nMadison County\nMarion County\nMontgomery County\nNewton County\nPike County\nPolk County\nScott County\nSearcy County\nStone County\nVan Buren County\nAQCR 022 Shreveport-Texarkana-Tyler Interstate Unclassifiable/Attainment\nColumbia County\nHempstead County\nHoward County\nLafayette County\nLittle River County\nMiller County\nSevier 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 Arkansas.\nArkansas—PM-10\nDesignated area Designation Classification\nDate Type Date Type\nAQCR 016 Central Arkansas Intrastate Unclassifiable Unclassifiable.\nAQCR 017 Metropolitan Fort Smith Interstate Unclassifiable Unclassifiable.\nAQCR 018 Metropolitan Memphis Intrastate Unclassifiable Unclassifiable.\nAQCR 019 Monroe (Louisiana)-El Dorado Interstate Unclassifiable Unclassifiable.\nAQCR 020 Northeast Arkansas Intrastate Unclassifiable Unclassifiable.\nAQCR 021 Northwest Arkansas Intrastate Unclassifiable Unclassifiable.\nAQCR 022 Shreveport-Texarkana-Tyler Interstate Unclassifiable Unclassifiable.\nArkansas—1997 Annual PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designation a Classification\nDate 1 Type Date Type\nAQCR 016 Central Arkansas Intrastate:\nChicot County Unclassifiable/Attainment\nClark County Unclassifiable/Attainment\nCleveland County Unclassifiable/Attainment\nConway County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDesha County Unclassifiable/Attainment\nDrew County Unclassifiable/Attainment\nFaulkner County Unclassifiable/Attainment\nGarland County Unclassifiable/Attainment\nGrant County Unclassifiable/Attainment\nHot Spring County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nLincoln County Unclassifiable/Attainment\nLonoke County Unclassifiable/Attainment\nPerry County Unclassifiable/Attainment\nPope County Unclassifiable/Attainment\nPulaski County Unclassifiable/Attainment\nSaline County Unclassifiable/Attainment\nYell County Unclassifiable/Attainment\nAQCR 017 Metropolitan Fort Smith Interstate:\nBenton County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nSebastian County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nAQCR 019 Monroe-El Dorado Interstate:\nAshley County Unclassifiable/Attainment\nBradley County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nNevada County Unclassifiable/Attainment\nOuachita County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nAQCR 020 Northeast Arkansas Intrastate:\nArkansas County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nCraighead County Unclassifiable/Attainment\nCross County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nIndependence County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nLawrence County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nMississippi County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nPhillips County Unclassifiable/Attainment\nPoinsett County Unclassifiable/Attainment\nPrairie County Unclassifiable/Attainment\nRandolph County Unclassifiable/Attainment\nSt. Francis County Unclassifiable/Attainment\nSharp County Unclassifiable/Attainment\nWhite County Unclassifiable/Attainment\nWoodruff County Unclassifiable/Attainment\nAQCR 021 Northwest Arkansas Intrastate:\nBaxter County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nCleburne County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFulton County Unclassifiable/Attainment\nIzard County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nLogan County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nNewton County Unclassifiable/Attainment\nPike County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nSearcy County Unclassifiable/Attainment\nStone County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nAQCR 022 Shreveport-Texarkana-Tyler Interstate:\nColumbia County Unclassifiable/Attainment\nHempstead County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nLafayette County Unclassifiable/Attainment\nLittle River County Unclassifiable/Attainment\nMiller County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment\nMemphis, TN-AR: (AQCR 018 Metropolitan Memphis Interstate):\nCrittenden 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.\nArkansas—2012 Annual PM2.5 NAAQS\n[Primary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nAQCR 016 Central Arkansas Intrastate:\nChicot County Unclassifiable/Attainment\nClark County Unclassifiable/Attainment\nCleveland County Unclassifiable/Attainment\nConway County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDesha County Unclassifiable/Attainment\nDrew County Unclassifiable/Attainment\nFaulkner County Unclassifiable/Attainment\nGarland County Unclassifiable/Attainment\nGrant County Unclassifiable/Attainment\nHot Spring County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nLincoln County Unclassifiable/Attainment\nLonoke County Unclassifiable/Attainment\nPerry County Unclassifiable/Attainment\nPope County Unclassifiable/Attainment\nPulaski County Unclassifiable/Attainment\nSaline County Unclassifiable/Attainment\nYell County Unclassifiable/Attainment\nAQCR 017 Metropolitan Fort Smith Interstate:\nBenton County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nSebastian County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nAQCR 018 Metropolitan Memphis Interstate: Crittenden County Unclassifiable/Attainment\nAQCR 019 Monroe-El Dorado Interstate:\nAshley County Unclassifiable/Attainment\nBradley County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nNevada County Unclassifiable/Attainment\nOuachita County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nAQCR 020 Northeast Arkansas Intrastate:\nArkansas County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nCraighead County Unclassifiable/Attainment\nCross County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nIndependence County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nLawrence County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nMississippi County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nPhillips County Unclassifiable/Attainment\nPoinsett County Unclassifiable/Attainment\nPrairie County Unclassifiable/Attainment\nRandolph County Unclassifiable/Attainment\nSt. Francis County Unclassifiable/Attainment\nSharp County Unclassifiable/Attainment\nWhite County Unclassifiable/Attainment\nWoodruff County Unclassifiable/Attainment\nAQCR 021 Northwest Arkansas Intrastate:\nBaxter County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nCleburne County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFulton County Unclassifiable/Attainment\nIzard County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nLogan County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nNewton County Unclassifiable/Attainment\nPike County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nSearcy County Unclassifiable/Attainment\nStone County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nAQCR 022 Shreveport-Texarkana-Tyler Interstate:\nColumbia County Unclassifiable/Attainment\nHempstead County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nLafayette County Unclassifiable/Attainment\nLittle River County Unclassifiable/Attainment\nMiller County Unclassifiable/Attainment\nSevier 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.\nArkansas—1997 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designation a Classification\nDate 1 Type Date Type\nAQCR 016 Central Arkansas Intrastate:\nChicot County Unclassifiable/Attainment\nClark County Unclassifiable/Attainment\nCleveland County Unclassifiable/Attainment\nConway County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDesha County Unclassifiable/Attainment\nDrew County Unclassifiable/Attainment\nFaulkner County Unclassifiable/Attainment\nGarland County Unclassifiable/Attainment\nGrant County Unclassifiable/Attainment\nHot Spring County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nLincoln County Unclassifiable/Attainment\nLonoke County Unclassifiable/Attainment\nPerry County Unclassifiable/Attainment\nPope County Unclassifiable/Attainment\nPulaski County Unclassifiable/Attainment\nSaline County Unclassifiable/Attainment\nYell County Unclassifiable/Attainment\nAQCR 017 Metropolitan Fort Smith Interstate:\nBenton County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nSebastian County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nAQCR 019 Monroe-El Dorado Interstate:\nAshley County Unclassifiable/Attainment\nBradley County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nNevada County Unclassifiable/Attainment\nOuachita County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nAQCR 020 Northeast Arkansas Intrastate:\nArkansas County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nCraighead County Unclassifiable/Attainment\nCross County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nIndependence County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nLawrence County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nMississippi County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nPhillips County Unclassifiable/Attainment\nPoinsett County Unclassifiable/Attainment\nPrairie County Unclassifiable/Attainment\nRandolph County Unclassifiable/Attainment\nSt. Francis County Unclassifiable/Attainment\nSharp County Unclassifiable/Attainment\nWhite County Unclassifiable/Attainment\nWoodruff County Unclassifiable/Attainment\nAQCR 021 Northwest Arkansas Intrastate:\nBaxter County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nCleburne County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFulton County Unclassifiable/Attainment\nIzard County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nLogan County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nNewton County Unclassifiable/Attainment\nPike County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nSearcy County Unclassifiable/Attainment\nStone County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nAQCR 022 Shreveport-Texarkana-Tyler Interstate:\nColumbia County Unclassifiable/Attainment\nHempstead County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nLafayette County Unclassifiable/Attainment\nLittle River County Unclassifiable/Attainment\nMiller County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment\nMemphis, TN-AR: (AQCR 018 Metropolitan Memphis Interstate):\nCrittenden 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.\nArkansas—2006 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designation a Classification\nDate 1 Type Date Type\nAQCR 016 Central Arkansas Intrastate:\nChicot County Unclassifiable/Attainment\nClark County Unclassifiable/Attainment\nCleveland County Unclassifiable/Attainment\nConway County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDesha County Unclassifiable/Attainment\nDrew County Unclassifiable/Attainment\nFaulkner County Unclassifiable/Attainment\nGarland County Unclassifiable/Attainment\nGrant County Unclassifiable/Attainment\nHot Spring County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nLincoln County Unclassifiable/Attainment\nLonoke County Unclassifiable/Attainment\nPerry County Unclassifiable/Attainment\nPope County Unclassifiable/Attainment\nPulaski County Unclassifiable/Attainment\nSaline County Unclassifiable/Attainment\nYell County Unclassifiable/Attainment\nAQCR 017 Metropolitan Fort Smith Interstate:\nBenton County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nSebastian County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nAQCR 019 Monroe-El Dorado Interstate:\nAshley County Unclassifiable/Attainment\nBradley County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nNevada County Unclassifiable/Attainment\nOuachita County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nAQCR 020 Northeast Arkansas Intrastate:\nArkansas County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nCraighead County Unclassifiable/Attainment\nCross County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nIndependence County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nLawrence County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nMississippi County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nPhillips County Unclassifiable/Attainment\nPoinsett County Unclassifiable/Attainment\nPrairie County Unclassifiable/Attainment\nRandolph County Unclassifiable/Attainment\nSt. Francis County Unclassifiable/Attainment\nSharp County Unclassifiable/Attainment\nWhite County Unclassifiable/Attainment\nWoodruff County Unclassifiable/Attainment\nAQCR 021 Northwest Arkansas Intrastate:\nBaxter County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nCleburne County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFulton County Unclassifiable/Attainment\nIzard County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nLogan County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nNewton County Unclassifiable/Attainment\nPike County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nSearcy County Unclassifiable/Attainment\nStone County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nAQCR 022 Shreveport-Texarkana-Tyler Interstate:\nColumbia County Unclassifiable/Attainment\nHempstead County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nLafayette County Unclassifiable/Attainment\nLittle River County Unclassifiable/Attainment\nMiller County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment\nMemphis, TN-AR: (AQCR 018 Metropolitan Memphis Interstate):\nCrittenden 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.\nArkansas—NO2 (1971 Annual Standard)\nDesignated area Does not meet primary standards Cannot be classified or better than national standards\nAQCR 016 X\nAQCR 017 X\nAQCR 018 X\nAQCR 019 X\nAQCR 020 X\nAQCR 021 X\nAQCR 022 X\nArkansas—NO2 (2010 1-Hour Standard)\nDesignated area Designation a\nDate 1 Type\nAshley County Unclassifiable/Attainment.\nArkansas County Unclassifiable/Attainment.\nBaxter County Unclassifiable/Attainment.\nBenton County Unclassifiable/Attainment.\nBoone County Unclassifiable/Attainment.\nBradley County Unclassifiable/Attainment.\nCalhoun County Unclassifiable/Attainment.\nCarroll County Unclassifiable/Attainment.\nChicot County Unclassifiable/Attainment.\nClark County Unclassifiable/Attainment.\nClay County Unclassifiable/Attainment.\nCleburne County Unclassifiable/Attainment.\nCleveland County Unclassifiable/Attainment.\nColumbia County Unclassifiable/Attainment.\nConway County Unclassifiable/Attainment.\nCraighead County Unclassifiable/Attainment.\nCrawford County Unclassifiable/Attainment.\nCrittenden County Unclassifiable/Attainment.\nCross County Unclassifiable/Attainment.\nDallas County Unclassifiable/Attainment.\nDesha County Unclassifiable/Attainment.\nDrew County Unclassifiable/Attainment.\nFaulkner County Unclassifiable/Attainment.\nFranklin County Unclassifiable/Attainment.\nFulton County Unclassifiable/Attainment.\nGarland County. Unclassifiable/Attainment.\nGrant County Unclassifiable/Attainment.\nGreene County Unclassifiable/Attainment.\nHempstead County Unclassifiable/Attainment.\nHot Spring County Unclassifiable/Attainment.\nHoward County. Unclassifiable/Attainment.\nIndependence County Unclassifiable/Attainment.\nIzard Count Unclassifiable/Attainment.\nJackson County Unclassifiable/Attainment.\nJefferson County. Unclassifiable/Attainment.\nJohnson County Unclassifiable/Attainment.\nLafayette County Unclassifiable/Attainment.\nLawrence County Unclassifiable/Attainment.\nLee County Unclassifiable/Attainment.\nLincoln County Unclassifiable/Attainment.\nLittle River County Unclassifiable/Attainment.\nLogan County Unclassifiable/Attainment.\nLonoke County Unclassifiable/Attainment.\nMadison County Unclassifiable/Attainment.\nMarion County Unclassifiable/Attainment.\nMiller County Unclassifiable/Attainment.\nMississippi County Unclassifiable/Attainment.\nMonroe County Unclassifiable/Attainment.\nMontgomery County Unclassifiable/Attainment.\nNevada County Unclassifiable/Attainment.\nNewton County Unclassifiable/Attainment.\nOuachita County Unclassifiable/Attainment.\nPerry County Unclassifiable/Attainment.\nPhillips County Unclassifiable/Attainment.\nPike County Unclassifiable/Attainment.\nPoinsett County Unclassifiable/Attainment.\nPolk County Unclassifiable/Attainment.\nPope County Unclassifiable/Attainment.\nPrairie County Unclassifiable/Attainment.\nPulaski County Unclassifiable/Attainment.\nRandolph County Unclassifiable/Attainment.\nSt. Francis County Unclassifiable/Attainment.\nSaline County Unclassifiable/Attainment.\nScott County Unclassifiable/Attainment.\nSearcy County Unclassifiable/Attainment.\nSebastian County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment.\nSharp County Unclassifiable/Attainment.\nStone County Unclassifiable/Attainment.\nUnion County Unclassifiable/Attainment.\nVan Buren County Unclassifiable/Attainment.\nWashington County Unclassifiable/Attainment.\nWhite County Unclassifiable/Attainment.\nWoodruff County Unclassifiable/Attainment.\nYell 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.\nArkansas—1997 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation a Category/classification\nDate 1 Type Date 1 Type\nMemphis TN-AR: (AQCR Metropolitan Memphis Interstate) Crittenden County Attainment (2)\nAQCR 016 Central Arkansas Intrastate (part) Unclassifiable/Attainment\nPulaski County\nAQCR 016 Central Arkansas Intrastate (remainder of) Unclassifiable/Attainment\nChicot County\nClark County\nCleveland County\nConway County\nDallas County\nDesha County\nDrew County\nFaulkner County\nGarland County\nGrant County\nHot Spring County\nJefferson County\nLincoln County\nLonoke County\nPerry County\nPope County\nSaline County\nYell County\nAQCR 017 Metropolitan Fort Smith Interstate Unclassifiable/Attainment\nBenton County\nCrawford County\nSebastian County\nWashington County\nAQCR 019 Monroe-El Dorado Interstate Unclassifiable/Attainment\nAshley County\nBradley County\nCalhoun County\nNevada County\nOuachita County\nUnion County\nAQCR 020 Northeast Arkansas Intrastate Unclassifiable/Attainment\nArkansas County\nClay County\nCraighead County\nCross County\nGreene County\nIndependence County\nJackson County\nLawrence County\nLee County\nMississippi County\nMonroe County\nPhillips County\nPoinsett County\nPrairie County\nRandolph County\nSt. Francis County\nSharp County\nWhite County\nWoodruff County\nAQCR 021 Northwest Arkansas Intrastate Unclassifiable/Attainment\nBaxter County\nBoone County\nCarroll County\nCleburne County\nFranklin County\nFulton County\nIzard County\nJohnson County\nLogan County\nMadison County\nMarion County\nMontgomery County\nNewton County\nPike County\nPolk County\nScott County\nSearcy County\nStone County\nVan Buren County\nAQCR 022 Shreveport-Texarkana-Tyler Interstate. Unclassifiable/Attainment\nColumbia County\nHempstead County\nHoward County\nLafayette County\nLittle River County\nMiller County\nSevier 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.\n2 Effective April 23, 2010.\nArkansas—2008 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nMemphis, TN-MS-AR 2 Crittenden County 4/25/2016 Attainment\nRest of State: 3\nAshley County Unclassifiable/Attainment\nArkansas County Unclassifiable/Attainment\nBaxter County Unclassifiable/Attainment\nBenton County Unclassifiable/Attainment\nBoone County Unclassifiable/Attainment\nBradley County Unclassifiable/Attainment\nCalhoun County Unclassifiable/Attainment\nCarroll County Unclassifiable/Attainment\nChicot County Unclassifiable/Attainment\nClark County Unclassifiable/Attainment\nClay County Unclassifiable/Attainment\nCleburne County Unclassifiable/Attainment\nCleveland County Unclassifiable/Attainment\nColumbia County Unclassifiable/Attainment\nConway County Unclassifiable/Attainment\nCraighead County Unclassifiable/Attainment\nCrawford County Unclassifiable/Attainment\nCross County Unclassifiable/Attainment\nDallas County Unclassifiable/Attainment\nDesha County Unclassifiable/Attainment\nDrew County Unclassifiable/Attainment\nFaulkner County Unclassifiable/Attainment\nFranklin County Unclassifiable/Attainment\nFulton County Unclassifiable/Attainment\nGarland County Unclassifiable/Attainment\nGrant County Unclassifiable/Attainment\nGreene County Unclassifiable/Attainment\nHempstead County Unclassifiable/Attainment\nHot Spring County Unclassifiable/Attainment\nHoward County Unclassifiable/Attainment\nIndependence County Unclassifiable/Attainment\nIzard County Unclassifiable/Attainment\nJackson County Unclassifiable/Attainment\nJefferson County Unclassifiable/Attainment\nJohnson County Unclassifiable/Attainment\nLafayette County Unclassifiable/Attainment\nLawrence County Unclassifiable/Attainment\nLee County Unclassifiable/Attainment\nLincoln County Unclassifiable/Attainment\nLittle River County Unclassifiable/Attainment\nLogan County Unclassifiable/Attainment\nLonoke County Unclassifiable/Attainment\nMadison County Unclassifiable/Attainment\nMarion County Unclassifiable/Attainment\nMiller County Unclassifiable/Attainment\nMississippi County Unclassifiable/Attainment\nMonroe County Unclassifiable/Attainment\nMontgomery County Unclassifiable/Attainment\nNevada County Unclassifiable/Attainment\nNewton County Unclassifiable/Attainment\nOuachita County Unclassifiable/Attainment\nPerry County Unclassifiable/Attainment\nPhillips County Unclassifiable/Attainment\nPike County Unclassifiable/Attainment\nPoinsett County Unclassifiable/Attainment\nPolk County Unclassifiable/Attainment\nPope County Unclassifiable/Attainment\nPrairie County Unclassifiable/Attainment\nPulaski County Unclassifiable/Attainment\nRandolph County Unclassifiable/Attainment\nSt. Francis County Unclassifiable/Attainment\nSaline County Unclassifiable/Attainment\nScott County Unclassifiable/Attainment\nSearcy County Unclassifiable/Attainment\nSebastian County Unclassifiable/Attainment\nSevier County Unclassifiable/Attainment\nSharp County Unclassifiable/Attainment\nStone County Unclassifiable/Attainment\nUnion County Unclassifiable/Attainment\nVan Buren County Unclassifiable/Attainment\nWashington County Unclassifiable/Attainment\nWhite County Unclassifiable/Attainment\nWoodruff County Unclassifiable/Attainment\nYell County Unclassifiable/Attainment\n1 This date is July 20, 2012, unless otherwise noted.\n2 Excludes Indian country located in each area, unless otherwise noted.\n3 Includes any Indian country in each county or area, unless otherwise specified.\nArkansas—2015 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area 1 Designation Classification\nDate 2 Type Date Type\nArkansas County Attainment/Unclassifiable\nAshley County Attainment/Unclassifiable\nBaxter County Attainment/Unclassifiable\nBenton County Attainment/Unclassifiable\nBoone County Attainment/Unclassifiable\nBradley County Attainment/Unclassifiable\nCalhoun County Attainment/Unclassifiable\nCarroll County Attainment/Unclassifiable\nChicot County Attainment/Unclassifiable\nClark County Attainment/Unclassifiable\nClay County Attainment/Unclassifiable\nCleburne County Attainment/Unclassifiable\nCleveland County Attainment/Unclassifiable\nColumbia County Attainment/Unclassifiable\nConway County Attainment/Unclassifiable\nCraighead County Attainment/Unclassifiable\nCrawford County Attainment/Unclassifiable\nCrittenden County Attainment/Unclassifiable\nCross County Attainment/Unclassifiable\nDallas County Attainment/Unclassifiable\nDesha County Attainment/Unclassifiable\nDrew County Attainment/Unclassifiable\nFaulkner County Attainment/Unclassifiable\nFranklin County Attainment/Unclassifiable\nFulton County Attainment/Unclassifiable\nGarland County Attainment/Unclassifiable\nGrant County Attainment/Unclassifiable\nGreene County Attainment/Unclassifiable\nHempstead County Attainment/Unclassifiable\nHot Spring County Attainment/Unclassifiable\nHoward County Attainment/Unclassifiable\nIndependence County Attainment/Unclassifiable\nIzard County Attainment/Unclassifiable\nJackson County Attainment/Unclassifiable\nJefferson County Attainment/Unclassifiable\nJohnson County Attainment/Unclassifiable\nLafayette County Attainment/Unclassifiable\nLawrence County Attainment/Unclassifiable\nLee County Attainment/Unclassifiable\nLincoln County Attainment/Unclassifiable\nLittle River County Attainment/Unclassifiable\nLogan County Attainment/Unclassifiable\nLonoke County Attainment/Unclassifiable\nMadison County Attainment/Unclassifiable\nMarion County Attainment/Unclassifiable\nMiller County Attainment/Unclassifiable\nMississippi County Attainment/Unclassifiable\nMonroe County Attainment/Unclassifiable\nMontgomery County Attainment/Unclassifiable\nNevada County Attainment/Unclassifiable\nNewton County Attainment/Unclassifiable\nOuachita County Attainment/Unclassifiable\nPerry County Attainment/Unclassifiable\nPhillips County Attainment/Unclassifiable\nPike County Attainment/Unclassifiable\nPoinsett County Attainment/Unclassifiable\nPolk County Attainment/Unclassifiable\nPope County Attainment/Unclassifiable\nPrairie County Attainment/Unclassifiable\nPulaski County Attainment/Unclassifiable\nRandolph County Attainment/Unclassifiable\nSt. Francis County Attainment/Unclassifiable\nSaline County Attainment/Unclassifiable\nScott County Attainment/Unclassifiable\nSearcy County Attainment/Unclassifiable\nSebastian County Attainment/Unclassifiable\nSevier County Attainment/Unclassifiable\nSharp County Attainment/Unclassifiable\nStone County Attainment/Unclassifiable\nUnion County Attainment/Unclassifiable\nVan Buren County Attainment/Unclassifiable\nWashington County Attainment/Unclassifiable\nWhite County Attainment/Unclassifiable\nWoodruff County Attainment/Unclassifiable\nYell County Attainment/Unclassifiable\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.\nArkansas—2008 Lead NAAQS\nDesignated area Designation for the 2008 NAAQS a\nDate 1 Type\nWhole 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":"ccd43b606b79ae4ed59ea2cb11420fdd55b6bccfdec48dca1942e4c865923796","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.303","next":"us/40-cfr-81.305"},"notice":"GroundRules: Original legal text. Not legal advice."}