Maryland.

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  2. CFR 40
  3. Protection of Environment
  4. Environmental Protection Agency
  5. Air Programs
  6. Designation of Areas for Air Quality Planning Purposes
  7. Section 107 Attainment Status Designations
  8. Maryland.

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§ 81.321 Maryland.

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Maryland - TSP

Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
Metropolitan Baltimore Intrastate AQCR:
(a) Baltimore City:
#111 Zones 61, 65-681 X
#112 Zone 72 X
#113 Zones 76-80 X
#117 Zones 94-100, 102, 103, 105-11 X
#118 Zones 114-137 X
#119 Zones 138, 140, 144, 146, 149 X
Zones 139, 141-143, 145, 147, 150-56 X
#120 Zones 157-66 X
#121 Zones 168-70, 172, 176-78, 180, 181 X
Zones 167, 171, 173-75, 179, 182 X
#123 Zones 187-90 X
#Zones 193-198 X
Zones 191, 192 X
#125 Zones 199-203 X
#126 Zone 207 X
Zones 204-06 X
(b) Baltimore County:
#325 Zones 417, 418, 420, 421 X
#326 Zones 428, 431 X
#328 Zone 446 X
#329 Zones 449, 453-58 X
Zones 450-52, 459 X
#330 Zones 461, 462 X
Zones 460, 463-68 X
#331 Zones 469-72 X
(c) Anne Arundel County:
#201 Zones 208, 209 X
#203 Zones 221-28 X
#204 Zones 230 X
(d) Remainder of AQCR X
Cumberland-Keyser Interstate AQCR:
(a) Election District No. 8, Luke, MD X
(b) Remainder AQCR X
Central Maryland Interstate AQCR X
National Capital Interstate AQCR X
Southern Maryland Intrastate AQCR X
Eastern Shore Intrastate AQCR X

1 Regional Planning Districts - defined by the Baltimore Regional Planning Council, Maps showing Districts and non-attainment areas available for inspection at the offices of: EPA, Region III, 6th and Walnut Streets, Phila., Pa. 19106; Md. Bureau of Air Quality and Noise Control, 201 West Preston Street, Baltimore, Md. 21201.

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Maryland - 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
Cumberland-Keyser Interstate AQCR, Election District No. 8, Luke, Md X
Remainder of State X
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Maryland - 2010 Sulfur Dioxide NAAQS

[Primary]

Designated area1 Designation
Date2 Type
Anne Arundel County and Baltimore County, MD1 9/12/16 Nonattainment.
Anne Arundel County (part)
Portions of Anne Arundel County that are within 26.8 kilometers of Herbert A. Wagner's Unit 3 stack, which is located at 39.17765 N. latitude, 76.52752 W. longitude
Baltimore County (part)
Portions of Baltimore County that are within 26.8 kilometers of Herbert A. Wagner's Unit 3 stack, which is located at 39.17765 N. latitude, 76.52752 W. longitude
Allegany County 4/30/2021 Attainment/Unclassifiable.
Anne Arundel County (part) Attainment/Unclassifiable.
Remainder of County
Baltimore City, MD 9/12/16 Attainment/Unclassifiable.
Baltimore County (part) Attainment/Unclassifiable.
Remainder of County
Calvert County Attainment/Unclassifiable.
Caroline County Attainment/Unclassifiable.
Carroll County Attainment/Unclassifiable.
Cecil County Attainment/Unclassifiable.
Charles County Attainment/Unclassifiable.
Dorchester County Attainment/Unclassifiable.
Frederick County Attainment/Unclassifiable.
Garrett County Attainment/Unclassifiable.
Harford County Attainment/Unclassifiable.
Howard County Attainment/Unclassifiable.
Kent County Attainment/Unclassifiable.
Montgomery County Attainment/Unclassifiable.
Prince George's County Attainment/Unclassifiable.
Queen Anne's County Attainment/Unclassifiable.
Somerset County Attainment/Unclassifiable.
St. Mary's County Attainment/Unclassifiable.
Talbot County Attainment/Unclassifiable.
Washington County Attainment/Unclassifiable.
Wicomico County Attainment/Unclassifiable.
Worcester 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 April 9, 2018, unless otherwise noted.

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Maryland - Carbon Monoxide

Designated area Designation Classification
Date1 Type Date1 Type
Baltimore Area
Baltimore City (part)
Regional Planning District No. 118 (generally corresponding to the Central Business District) 12/15/95 Attainment
Washington Area
Montgomery County (part)
Election Districts 4, 7, 13 Attainment
Prince George's County (part)
Election Districts 2, 6, 12, 16, 17, 18 Attainment
AQCR 047 National Capital Interstate (Remainder of) Unclassifiable/Attainment
Montgomery County (part)
Remainder of county
Prince George's County (part)
Remainder of County
AQCR 112 Central Maryland Intrastate Unclassifiable/Attainment
Frederick County
AQCR 113 Cumberland-Keyser Interstate Unclassifiable/Attainment
Allegany County
Garrett County
Washington County
AQCR 114 Eastern Shore Interstate Unclassifiable/Attainment
Caroline County
Cecil County
Dorchester County
Kent County
Queen Anne's County
Kent County 12/22/06 Attainment
Queen Anne's County 12/22/06 Attainment
Somerset County
Talbot County
Wicomico County
Worcester County
AQCR 115 Metro. Baltimore Intrastate (Remainder of) Unclassifiable/Attainment
Anne Arundel County
Baltimore City (part)
Remainder of City
Baltimore County
Carroll County
Harford County
Howard County
AQCR 116 Southern Maryland Intrastate Unclassifiable/Attainment
Calvert County
Charles County
St. Mary's County

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

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Maryland - Ozone (1-Hour Standard)2

Designated area Designation Classification
Date1 Type Date1 Type
Baltimore Area:
Anne Arundel County 11/15/90 Nonattainment 11/15/90 Severe-15.
Baltimore
City of Baltimore 11/15/90 Nonattainment 11/15/90 Severe-15.
Baltimore County 11/15/90 Nonattainment 11/15/90 Severe-15.
Carroll County 11/15/90 Nonattainment 11/15/90 Severe-15.
Harford County 11/15/90 Nonattainment 11/15/90 Severe-15.
Howard County 11/15/90 Nonattainment 11/15/90 Severe-15.
Kent County and Queen Anne's County Area:
Kent County 10/21/04 Attainment
Queen Anne's County 10/21/04 Attainment
Philadelphia-Wilmington-Trenton Area:
Cecil County 11/15/90 Nonattainment 11/15/90 Severe-15.
Washington, DC Area:
Calvert County Nonattainment 3/25/03 Severe
Charles County Nonattainment 3/25/03 Severe
Frederick County Nonattainment 3/25/03 Severe
Montgomery County Nonattainment 3/25/03 Severe
Prince George's County Nonattainment 3/25/03 Severe
AQCR 113 Cumberland-Keyser Interstate Unclassifiable/Attainment
Allegany County
Garrett County
Washington County
AQCR 114 Eastern Shore Interstate (Remainder of) Unclassifiable/Attainment
Caroline County
Dorchester County
Somerset County
Talbot County
Wicomico County
Worcester County
AQCR 116 Southern Maryland Intrastate (Remainder of) Unclassifiable/Attainment
St. Mary's County

1 This date is October 18, 2000, unless otherwise noted.

2 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Maryland except the Washington Co. area where it is revoked effective April 15, 2009.

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Maryland - 1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designationa Classification
Date1 Type Date2 Type
Baltimore, MD:
Anne Arundel County 12/16/14 Attainment
Baltimore County 12/16/14 Attainment
Carroll County 12/16/14 Attainment
Harford County 12/16/14 Attainment
Howard County 12/16/14 Attainment
City of Baltimore 12/16/14 Attainment
Martinsburg, WV-Hagerstown, MD:
Washington County 12/16/14 Attainment
Washington, DC-MD-VA:
Charles County 10/6/14 Attainment
Frederick County 10/6/14 Attainment
Montgomery County 10/6/14 Attainment
Prince George's County 10/6/14 Attainment
AQCR 113 Cumberland-Keyser Interstate:
Allegany County Unclassifiable/Attainment.
Garrett County Unclassifiable/Attainment.
AQCR 114 Eastern Shore Interstate (remainder of):
Caroline County Unclassifiable/Attainment.
Cecil County Unclassifiable/Attainment.
Dorchester County Unclassifiable/Attainment.
Kent County Unclassifiable/Attainment.
Queen Anne's County Unclassifiable/Attainment.
Somerset County Unclassifiable/Attainment.
Talbot County Unclassifiable/Attainment.
Wicomico County Unclassifiable/Attainment.
Worcester County Unclassifiable/Attainment.
AQCR 116 Southern Maryland Intrastate (remainder of):
Calvert County Unclassifiable/Attainment.
St. Mary's 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.

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

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Maryland - 2012 Annual PM2.5 NAAQS

[Primary]

Designated area1 Designation Classification
Date2 Type Date2 Type
AQCR 047 National Capital Interstate (DC-MD-VA) (part):
Montgomery County Unclassifiable/Attainment
Prince George's County Unclassifiable/Attainment
Metropolitan Baltimore Intrastate AQCR:
Anne Arundel County Unclassifiable/Attainment
Baltimore County Unclassifiable/Attainment
City of Baltimore Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Harford County Unclassifiable/Attainment
Howard County Unclassifiable/Attainment
AQCR 112 Central Maryland Intrastate:
Frederick County Unclassifiable/Attainment
AQCR 113 Cumberland-Keyser Interstate:
Allegany County Unclassifiable/Attainment
Garrett County Unclassifiable/Attainment
Washington County Unclassifiable/Attainment
AQCR 114 Eastern Shore Intrastate:
Caroline County Unclassifiable/Attainment
Cecil County Unclassifiable/Attainment
Dorchester County Unclassifiable/Attainment
Kent County Unclassifiable/Attainment
Queen Anne's County Unclassifiable/Attainment
Somerset County Unclassifiable/Attainment
Talbot County Unclassifiable/Attainment
Wicomico County Unclassifiable/Attainment
Worcester County Unclassifiable/Attainment
AQCR 116 Southern Maryland Intrastate:
Calvert County Unclassifiable/Attainment
Charles County Unclassifiable/Attainment
St. Mary's 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.

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Maryland - 1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designationa Classification
Date1 Type Date Type
AQCR 047 National Capital Interstate (DC-MD-VA) (part):
Montgomery County Unclassifiable/Attainment.
Prince George's County Unclassifiable/Attainment.
Metropolitan Baltimore Intrastate AQCR:
Anne Arundel County Unclassifiable/Attainment.
Baltimore County Unclassifiable/Attainment.
City of Baltimore Unclassifiable/Attainment.
Carroll County Unclassifiable/Attainment.
Harford County Unclassifiable/Attainment.
Howard County Unclassifiable/Attainment.
AQCR 112 Central Maryland Intrastate:
Frederick County Unclassifiable/Attainment.
AQCR 113 Cumberland-Keyser Interstate:
Allegany County Unclassifiable/Attainment.
Garrett County Unclassifiable/Attainment.
Washington County Unclassifiable/Attainment.
AQCR 114 Eastern Shore Intrastate:
Caroline County Unclassifiable/Attainment.
Cecil County Unclassifiable/Attainment.
Dorchester County Unclassifiable/Attainment.
Kent County Unclassifiable/Attainment.
Queen Anne's County Unclassifiable/Attainment.
Somerset County Unclassifiable/Attainment.
Talbot County Unclassifiable/Attainment.
Wicomico County Unclassifiable/Attainment.
Worcester County Unclassifiable/Attainment.
AQCR 116 Southern Maryland Intrastate:
Calvert County Unclassifiable/Attainment.
Charles County Unclassifiable/Attainment.
St. Mary's 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.

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Maryland - 2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designationa Classification
Date1 Type Date Type
AQCR 047 National Capital Interstate (DC-MD-VA) (part):
Montgomery County Unclassifiable/Attainment.
Prince George's County Unclassifiable/Attainment.
Metropolitan Baltimore Intrastate AQCR:
Anne Arundel County Unclassifiable/Attainment.
Baltimore County Unclassifiable/Attainment.
City of Baltimore Unclassifiable/Attainment.
Carroll County Unclassifiable/Attainment.
Harford County Unclassifiable/Attainment.
Howard County Unclassifiable/Attainment.
AQCR 112 Central Maryland Intrastate:
Frederick County Unclassifiable/Attainment.
AQCR 113 Cumberland-Keyser Interstate:
Allegany County Unclassifiable/Attainment.
Garrett County Unclassifiable/Attainment.
Washington County Unclassifiable/Attainment.
AQCR 114 Eastern Shore Intrastate:
Caroline County Unclassifiable/Attainment.
Cecil County Unclassifiable/Attainment.
Dorchester County Unclassifiable/Attainment.
Kent County Unclassifiable/Attainment.
Queen Anne's County Unclassifiable/Attainment.
Somerset County Unclassifiable/Attainment.
Talbot County Unclassifiable/Attainment.
Wicomico County Unclassifiable/Attainment.
Worcester County Unclassifiable/Attainment.
AQCR 116 Southern Maryland Intrastate:
Calvert County Unclassifiable/Attainment.
Charles County Unclassifiable/Attainment.
St. Mary's 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.

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Maryland - NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards
State of Maryland X
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Maryland - NO2 (2010 1-Hour Standard)

Designated area Designationa
Date1 Type
Allegany County Unclassifiable/Attainment.
Anne Arundel County Unclassifiable/Attainment.
Baltimore County Unclassifiable/Attainment.
City of Baltimore Unclassifiable/Attainment.
Calvert County Unclassifiable/Attainment.
Caroline County Unclassifiable/Attainment.
Carroll County Unclassifiable/Attainment.
Cecil County Unclassifiable/Attainment.
Charles County Unclassifiable/Attainment.
Dorchester County Unclassifiable/Attainment.
Frederick County Unclassifiable/Attainment.
Garrett County Unclassifiable/Attainment.
Harford County Unclassifiable/Attainment.
Howard County Unclassifiable/Attainment.
Kent County Unclassifiable/Attainment.
Montgomery County Unclassifiable/Attainment.
Prince George's County Unclassifiable/Attainment.
Queene Anne's County Unclassifiable/Attainment.
St. Mary's County Unclassifiable/Attainment.
Somerset County Unclassifiable/Attainment.
Talbot County Unclassifiable/Attainment.
Washington County Unclassifiable/Attainment.
Wicomico County Unclassifiable/Attainment.
Worchester 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.

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Maryland - 1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designationa Category/classification
Date1 Type Date1 Type
Baltimore, MD:
Anne Arundel County Nonattainment (5) Subpart 2/Serious.4
City of Baltimore Nonattainment (5) Subpart 2/Serious.4
Baltimore County Nonattainment (5) Subpart 2/Serious.4
Carroll County Nonattainment (5) Subpart 2/Serious.4
Harford County Nonattainment (5) Subpart 2/Serious.4
Howard County Nonattainment (5) Subpart 2/Serious.4
Kent and Queen Anne's Area
Kent County 1/22/07 Attainment
Queen Anne's County 1/22/07 Attainment
Washington County (Hagerstown), MD:
Washington County (2) Attainment.
Philadelphia-Wilmin-Atlantic Ci, PA-NJ-MD-DE:
Cecil County Nonattainment Subpart 2/Moderate.4
Washington, DC-MD-VA:
Calvert County Nonattainment Subpart 2/Moderate.
Charles County Nonattainment Subpart 2/Moderate.
Frederick County Nonattainment Subpart 2/Moderate.
Montgomery County Nonattainment Subpart 2/Moderate.
Prince George's County Nonattainment Subpart 2/Moderate.
AQCR 113 Cumberland-Keyser Interstate Unclassifiable/Attainment
Allegany County
Garrett County
AQCR 114 Eastern Shore Interstate (remainder of) Unclassifiable/Attainment
Caroline County
Dorchester County
Somerset County
Talbot County
Wicomico County
Worcester County
AQCR 116 Southern Maryland Intrastate (remainder of) Unclassifiable/Attainment
St. Mary's County

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

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

2 Effective April 15, 2008.

3 November 22, 2004.

4 Attainment date is June 15, 2013.

5 Effective March 2, 2012.

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Maryland - 2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification
Date1 Type Date1 Type
Baltimore, MD:2 Nonattainment Moderate.
Anne Arundel County
Baltimore County
Baltimore City
Carroll County
Harford County
Howard County
Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE:2 Nonattainment 6/3/16 Marginal.4
Cecil County
Washington, DC-MD-VA:2 April 15, 2019 Attainment
Calvert County 4/15/19 Attainment
Charles County 4/15/19 Attainment
Frederick County 4/15/19 Attainment
Montgomery County 4/15/19 Attainment
Prince George's County 4/15/19 Attainment
AQCR 113 Cumberland-Keyser Interstate3 Unclassifiable/Attainment
Allegany County
Garrett County
Washington County
AQCR 114 Eastern Shore Interstate: (remainder)3 Unclassifiable/Attainment
Caroline County
Dorchester County
Kent County
Queen Anne's County
Somerset County
Talbot County
Wicomico County
Worcester County
AQCR 116 Southern Maryland Intrastate: (remainder)3 Unclassifiable/Attainment
St. Mary's County

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.

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Maryland - 2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area1 Designation Classification
Date2 Type Date2 Type
Baltimore, MD Nonattainment Marginal.
Anne Arundel County.
Baltimore County.
Carroll County.
Harford County.
Howard County.
City of Baltimore.
Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE Nonattainment Marginal.
Cecil County.
Washington, DC-MD-VA Nonattainment Marginal.
Calvert County.
Charles County.
Frederick County.
Montgomery County.
Prince George's County.
Allegany County 1/16/18 Attainment/Unclassifiable
Caroline County 1/16/18 Attainment/Unclassifiable
Dorchester County Attainment/Unclassifiable
Garrett County 1/16/18 Attainment/Unclassifiable
Kent County Attainment/Unclassifiable
Queen Anne's County Attainment/Unclassifiable
St. Mary's County Attainment/Unclassifiable
Somerset County 1/16/18 Attainment/Unclassifiable
Talbot County Attainment/Unclassifiable
Washington County Attainment/Unclassifiable
Wicomico County 1/16/18 Attainment/Unclassifiable
Worcester County 1/16/18 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.

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Maryland - 2008 Lead NAAQS

Designated area Designation for the 2008 NAAQSa
Date1 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.

[43 FR 40510, Sept. 12, 1978]

Editorial Note

Editorial Note:

For Federal Register citations affecting § 81.321, 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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