{"data":{"id":"us/40-cfr-81.309","jurisdiction":"us","citation":"40 CFR 81.309","heading":"District of Columbia.","body":"District of Columbia—TSP\nDesignated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards\n1. Area bounded by: East Capitol Street S.E., District Line (Southern Avenue S.E.), Eastern Shore of Potomac River and Eastern Shore of Anacostia River X\n2. Area bounded by: Francis Scott Key Bridge, M Street, N.W., 23rd Street N.W., Florida Avenue N.W., U Street N.W., Florida Avenue N.W.-N.E., 4th Street N.E.-S.E. Southeast-Southwest Freeway (I295, I395), 15th Street S.W.-N.W., Constitution Avenue N.W., Theodore Roosevelt Memorial Bridge, Potomac River X\n3. Remainder of the District of Columbia portion of the National Capital Interstate AQCR X\nDistrict of Columbia—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\nNational Capital Interstate AQCR—District of Columbia portion X\nDistrict of Columbia—2010 Sulfur Dioxide NAAQS\n[Primary]\nDesignated area 1 Designation\nDate 2 Type\nDistrict of Columbia 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.\nDistrict of Columbia-Carbon Monoxide\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nWashington Area:\nWashington Entire Area. Attainment\n1 This date is November 15, 1990, unless otherwise noted.\nDistrict of Columbia—Ozone (1-Hour Standard)2\nDesignated area Designation Classification\nDate 1 Type Date 1 Type\nWashington Area: Washington Entire Area Nonattainment 3/25/2003 Severe\n1 This date is November 15, 1990, unless otherwise noted.\n2 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in the District of Columbia.\nDistrict of Columbia—1997 Annual PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nWashington, DC-MD-VA:\nDistrict of Columbia 10/6/2014 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.\n2 This date is July 2, 2014, unless otherwise noted.\nDistrict of Columbia—2012 Annual PM2.5 NAAQS\n[Primary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nAQCR 047 National Capital Interstate (DC-MD-VA) (part)\nDistrict of Columbia 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.\nDistrict of Columbia—1997 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nAQCR 047 National Capital Interstate (DC-MD-VA) (part)\nDistrict of Columbia 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.\nDistrict of Columbia—2006 24-Hour PM2.5 NAAQS\n[Primary and Secondary]\nDesignated area Designationa Classification\nDate1 Type Date Type\nAQCR 047 National Capital Interstate (DC-MD-VA) (part)\nDistrict of Columbia 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.\nDistrict of Columbia—NO2 (1971 Annual Standard)\nDesignated area Does not meet primary standards Cannot be classified or better than national standards\nNational Capital Interstate AQCR—District of Columbia portion X\nDistrict of Columbia—NO2 (2010 1-Hour Standard)\nDesignated area Designation a\nDate 1 Type\nDistrict of Columbia 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.\nDistrict of Columbia—1997 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation a Category/classification\nDate 1 Type Date 1 Type\nWashington, DC-MD-VA:\nDistrict of Columbia Nonattainment Subpart 2/Moderate.\na Includes Indian Country located in each county or area, except as otherwise specified.\n1 This date is June 15, 2004, unless otherwise noted.\nDistrict of Columbia—2008 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area Designation Classification\nDate Type Date Type\nWashington, DC-MD-VA: District of Columbia 1 July 16, 2019 Attainment\n1 Excludes Indian country located in each area, unless otherwise noted.\nDistrict of Columbia—2015 8-Hour Ozone NAAQS\n[Primary and Secondary]\nDesignated area 1 Designation Classification\nDate 2 Type Date 2 Type\nWashington, DC-MD-VA Nonattainment 11/7/2022 Moderate.\nDistrict of Columbia.\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.\nDistrict of Columbia—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":"ff91696b28d03f649522bb07bdc2b50bc6d1e033f9cdd6f13304db14914b1794","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-81.308","next":"us/40-cfr-81.310"},"notice":"GroundRules: Original legal text. Not legal advice."}