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§81.308 Delaware.

RegSenseAir QualityCFR RegulationsEnvironmental Protection Agency (EPA)Air ProgramsEnvironmentalAir QualityCFR SectionEnglishFocus AreaUSA

Delaware - TSP
Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
City of Wilmington X
Section within City of Newark bounded by: College Avenue, CONRAIL tracks, South Chapel Street and Chestnut Hill Road X
Remainder of New Castle County X
Kent County X
Sussex County X

Delaware - 1971 Sulfur Dioxide NAAQS (Primary and Secondary)
Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
New Castle County X
Kent County X
Sussex County X

Delaware - 2010 Sulfur Dioxide NAAQS (Primary)
Designated area 1 Designation
Date 2 Type
Entire State Attainment/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.

Delaware - Carbon Monoxide
Designated Area Designation Classification
Date 1 Type Date 1 Type
Kent County Unclassifiable/Attainment
New Castle County Unclassifiable/Attainment
Sussex County Unclassifiable/Attainment
1 This date is November 15, 1990, unless otherwise noted.

Delaware - Ozone (1-Hour Standard)3
Designated area Designation Classification
Date 1 Type Date 1 Type
Philadelphia-Wilmington-Trenton Area:
Kent County Nonattainment Severe-15.
New Castle County Nonattainment Severe-15.
Sussex County Area:
Sussex County ( 2) Nonattainment ( 2) Marginal.
1 This date is November 15, 1990, unless otherwise noted.
2 This date is October 18, 2000.
3 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Delaware.

Delaware - 1997 Annual PM2.5 NAAQS[Primary and secondary]
Designated area Designation a Classification
Date 1 Type Date Type
Philadelphia-Wilmington, PA-NJ-DE: New Castle County 8/5/2014 Attainment
Southern Delaware Intrastate AQCR:
Kent County Unclassifiable/Attainment.
Sussex County Unclassifiable/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.

Delaware - 2012 Annual PM2.5 NAAQS[Primary]
Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Statewide:
Kent County Unclassifiable/Attainment
New Castle County Unclassifiable/Attainment
Sussex County Unclassifiable/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.

Delaware - 1997 24-Hour PM2.5 NAAQS[Primary and secondary]
Designated area Designation a Classification
Date 1 Type Date Type
Philadelphia-Wilmington, PA-NJ-DE:
New Castle County Unclassifiable/Attainment.
Southern Delaware Intrastate AQCR:
Kent County Unclassifiable/Attainment.
Sussex County Unclassifiable/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.

Delaware - 2006 24-Hour PM2.5 NAAQS[Primary and secondary]
Designated area Designation a Classification
Date 1 Type Date Type
Philadelphia-Wilmington, PA-NJ-DE: New Castle County 8/5/2014 Attainment
Southern Delaware Intrastate AQCR:
Kent County Unclassifiable/Attainment.
Sussex County Unclassifiable/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.

NO2 (1971 Annual Standard)
Designated area Does not meet primary standards Cannot be classified or better than national standards
New Castle County X
Kent County X
Sussex County X

Delaware - NO2 (2010 1-Hour Standard)
Designated area Designation a
Date 1 Type
Kent County Unclassifiable/Attainment.
New Castle County Unclassifiable/Attainment.
Sussex County Unclassifiable/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.

Delaware - 1997 8-Hour Ozone NAAQS (Primary and Secondary)
Designated area Designation a Category/classification
Date 1 Type Date 1 Type
Philadelphia-Wilmington-Atlantic Ci, PA-NJ-MD-DE:
Kent County Nonattainment Subpart 2/Moderate. 2
New Castle County Nonattainment Subpart 2/Moderate. 2
Sussex County Nonattainment Subpart 2/Moderate. 2
a Includes Indian Country located in each county or area, except as otherwise specified.
a Includes Indian Country located in each county or area, except as otherwise specified.
1 This date is June 15, 2004, unless otherwise noted.

Delaware - 2008 8-Hour Ozone NAAQS[Primary and secondary]
Designated area Designation Classification
Date 1 Type Date 1 Type
Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE: 2 Nonattainment 6/3/16 Marginal. 4
New Castle County
Seaford: 2
Sussex County Nonattainment Marginal.
Rest of State: 3
Southern Delaware Intrastate AQCR: (remainder)
Kent County Unclassifiable/Attainment
1 This date is July 20, 2012, unless otherwise noted.
2 Excludes Indian country located in each area, unless otherwise noted.
3 Includes any Indian country in each county or area, unless otherwise specified.
4 Attainment date is extended to July 20, 2016.

Delaware - 2015 8-Hour Ozone NAAQS[Primary and Secondary]
Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DENonattainment7/30/2024Serious.
New Castle County.
Kent County Attainment/Unclassifiable
Sussex County Attainment/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 August 3, 2018, unless otherwise noted.

Delaware - 2008 Lead NAAQS
Designated area Designation for the 2008 NAAQS a
Date 1 Type
Whole State Unclassifiable/Attainment.
a Includes Indian Country located in each county or area, except as otherwise specified.
1 December 31, 2011 unless otherwise noted.

Editorial Note: For Federal Register citations affecting § 81.308, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.

[43 FR 40505, Sept. 12, 1978; 87 FR 60917, Oct. 7, 2022; 89 FR 61026, July. 30, 2024]

['Air Programs']
['Air Quality']
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