District of Columbia—TSP

Designated areaDoes not meet primary standardsDoes not meet secondary standardsCannot be classifiedBetter than national standards
1. Area bounded by: East Capitol Street S.E., District Line (Southern Avenue S.E.), Eastern Shore of Potomac River and Eastern Shore of Anacostia RiverX
2. 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 RiverX
3. Remainder of the District of Columbia portion of the National Capital Interstate AQCRX

District of Columbia—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

Designated areaDoes not meet primary standardsDoes not meet secondary standardsCannot be classifiedBetter than national standards
National Capital Interstate AQCR—District of Columbia portionX

District of Columbia—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1Designation
Date 2Type
District of ColumbiaAttainment/Unclassifiable.

1 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.

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

District of Columbia-Carbon Monoxide

Designated area DesignationClassification
Date 1TypeDate 1Type
Washington Area:
Washington Entire Area.Attainment

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

District of Columbia—Ozone (1-Hour Standard)2

Designated area Designation Classification
Date 1 Type Date 1 Type
Washington Area: Washington Entire AreaNonattainment3/25/03Severe

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

2 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in the District of Columbia.

District of Columbia—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated areaDesignationaClassification
Date1TypeDateType
Washington, DC-MD-VA:
District of Columbia10/6/14Attainment

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

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

2 This date is July 2, 2014, unless otherwise noted.

District of Columbia—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1DesignationClassification
Date 2TypeDate 2Type
AQCR 047 National Capital Interstate (DC-MD-VA) (part)
District of ColumbiaUnclassifiable/Attainment

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

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

District of Columbia—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated areaDesignationaClassification
Date1TypeDateType
AQCR 047 National Capital Interstate (DC-MD-VA) (part)
District of ColumbiaUnclassifiable/Attainment.

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

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

District of Columbia—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated areaDesignationaClassification
Date1TypeDateType
AQCR 047 National Capital Interstate (DC-MD-VA) (part)
District of ColumbiaUnclassifiable/Attainment.

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

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

District of Columbia—NO2 (1971 Annual Standard)

Designated areaDoes not meet primary standardsCannot be classified or better than national standards
National Capital Interstate AQCR—District of Columbia portionX

District of Columbia—NO2 (2010 1-Hour Standard)

Designated areaDesignation a
Date 1Type
District of ColumbiaUnclassifiable/Attainment.

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

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

District of Columbia—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation aCategory/classification
Date 1Type Date 1Type
Washington, DC-MD-VA:
District of ColumbiaNonattainmentSubpart 2/Moderate.

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

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

District of Columbia—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated areaDesignationClassification
Date TypeDate Type
Washington, DC-MD-VA: District of Columbia 1July 16, 2019Attainment

1 Excludes Indian country located in each area, unless otherwise noted.

District of Columbia—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1DesignationClassification
Date 2TypeDate 2Type
Washington, DC-MD-VANonattainment11/7/22Moderate.
District of Columbia.

1 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.

2 This date is August 3, 2018, unless otherwise noted.

District of Columbia—2008 Lead NAAQS

Designated areaDesignation for the 2008 NAAQS a
Date 1Type
Whole StateUnclassifiable/Attainment.

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

1 December 31, 2011 unless otherwise noted.

[43 FR 40507, Sept. 12, 1978]Editorial Note:For Federal Register citations affecting § 81.309, 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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