{"data":{"id":"us/40-cfr-81.308","jurisdiction":"us","citation":"40 CFR 81.308","heading":"Delaware.","body":"Delaware—TSP\nDesignated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards\nCity of Wilmington X\nSection within City of Newark bounded by: College Avenue, CONRAIL tracks, South Chapel Street and Chestnut Hill Road X\nRemainder of New Castle County X\nKent County X\nSussex County X\nDelaware—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\nNew Castle County X\nKent County X\nSussex County X\nDelaware—2010 Sulfur Dioxide NAAQS\n[Primary]\nDesignated area 1 Designation\nDate 2 Type\nEntire State 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.\nDelaware—Carbon Monoxide\nDesignated Area Designation Classification\nDate 1 Type Date 1 Type\nKent County Unclassifiable/Attainment\nNew Castle County Unclassifiable/Attainment\nSussex County Unclassifiable/Attainment\n1 This date is November 15, 1990, unless otherwise noted.\nDelaware—Ozone (1-Hour Standard)3\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nPhiladelphia-Wilmington-Trenton Area:\nKent County Nonattainment Severe-15.\nNew Castle County Nonattainment Severe-15.\nSussex County Area:\nSussex County (2) Nonattainment (2) Marginal.\n1 This date is November 15, 1990, unless otherwise noted.\n2 This date is October 18, 2000.\n3 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Delaware.\nDelaware—1997 Annual PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nPhiladelphia-Wilmington, PA-NJ-DE: New Castle County 8/5/2014 Attainment\nSouthern Delaware Intrastate AQCR:\nKent County Unclassifiable/Attainment.\nSussex 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.\nDelaware—2012 Annual PM2.5 NAAQS\n[Primary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nStatewide:\nKent County Unclassifiable/Attainment\nNew Castle County Unclassifiable/Attainment\nSussex 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.\nDelaware—1997 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nPhiladelphia-Wilmington, PA-NJ-DE:\nNew Castle County Unclassifiable/Attainment.\nSouthern Delaware Intrastate AQCR:\nKent County Unclassifiable/Attainment.\nSussex 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.\nDelaware—2006 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nPhiladelphia-Wilmington, PA-NJ-DE: New Castle County 8/5/2014 Attainment\nSouthern Delaware Intrastate AQCR:\nKent County Unclassifiable/Attainment.\nSussex 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.\nNO2 (1971 Annual Standard)\nDesignated area Does not meet primary standards Cannot be classified or better than national standards\nNew Castle County X\nKent County X\nSussex County X\nDelaware—NO2 (2010 1-Hour Standard)\nDesignated area Designation a\nDate 1 Type\nKent County Unclassifiable/Attainment.\nNew Castle County Unclassifiable/Attainment.\nSussex 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.\nDelaware—1997 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation a Category/classification\nDate 1 Type Date 1 Type\nPhiladelphia-Wilmington-Atlantic Ci, PA-NJ-MD-DE:\nKent County Nonattainment Subpart 2/Moderate.2\nNew Castle County Nonattainment Subpart 2/Moderate.2\nSussex County Nonattainment Subpart 2/Moderate.2\na Includes Indian Country located in each county or area, except as otherwise specified.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is June 15, 2004, unless otherwise noted.\nDelaware—2008 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nNew Castle County 2 7/6/2026 Nonattainment 6/3/2016 Marginal.4\nNew Castle County\nSeaford: 2\nSussex County Nonattainment Marginal.\nRest of State: 3\nSouthern Delaware Intrastate AQCR: (remainder)\nKent 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.\n4 Attainment date is extended to July 20, 2016.\nDelaware—2015 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nNew Castle County 7/6/2026 Nonattainment 7/30/2024 Serious.\nNew Castle County.\nKent County Attainment/Unclassifiable\nSussex 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 August 3, 2018, unless otherwise noted.\nDelaware—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":"facd73f25bb60b1f0c0f5db39b4492cce0011e3f57cfd51b01bda61e6a0853ac","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.307","next":"us/40-cfr-81.309"},"notice":"GroundRules: Original legal text. Not legal advice."}