40 CFR 81.321: Maryland.

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, 65-68 1 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.

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

Maryland—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1 Designation

Date 2 Type

Anne Arundel County and Baltimore County, MD1 9/12/2016 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 9/12/2016 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.

Maryland—Carbon Monoxide

Designated area Designation Classification

Date 1 Type Date 1 Type

Baltimore Area

Baltimore City (part)

Regional Planning District No. 118 (generally corresponding to the Central Business District) 12/15/1995 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 12/22/2006 Attainment

Queen Anne's County 12/22/2006 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.

Maryland—Ozone (1-Hour Standard)2

Designated area Designation Classification

Date 1 Type Date 1 Type

Baltimore Area:

Anne Arundel County 11/15/1990 Nonattainment 11/15/1990 Severe-15.

Baltimore

City of Baltimore 11/15/1990 Nonattainment 11/15/1990 Severe-15.

Baltimore County 11/15/1990 Nonattainment 11/15/1990 Severe-15.

Carroll County 11/15/1990 Nonattainment 11/15/1990 Severe-15.

Harford County 11/15/1990 Nonattainment 11/15/1990 Severe-15.

Howard County 11/15/1990 Nonattainment 11/15/1990 Severe-15.

Kent County and Queen Anne's County Area:

Kent County 10/21/2004 Attainment

Queen Anne's County 10/21/2004 Attainment

Philadelphia-Wilmington-Trenton Area:

Cecil County 11/15/1990 Nonattainment 11/15/1990 Severe-15.

Washington, DC Area:

Calvert County Nonattainment 3/25/2003 Severe

Charles County Nonattainment 3/25/2003 Severe

Frederick County Nonattainment 3/25/2003 Severe

Montgomery County Nonattainment 3/25/2003 Severe

Prince George's County Nonattainment 3/25/2003 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.

Maryland—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 Type Date 2 Type

Baltimore, MD:

Anne Arundel County 12/16/2014 Attainment

Baltimore County 12/16/2014 Attainment

Carroll County 12/16/2014 Attainment

Harford County 12/16/2014 Attainment

Howard County 12/16/2014 Attainment

City of Baltimore 12/16/2014 Attainment

Martinsburg, WV-Hagerstown, MD:

Washington County 12/16/2014 Attainment

Washington, DC-MD-VA:

Charles County 10/6/2014 Attainment

Frederick County 10/6/2014 Attainment

Montgomery County 10/6/2014 Attainment

Prince George's County 10/6/2014 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.

Maryland—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification

Date 2 Type Date 2 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.

Maryland—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 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.

Maryland—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 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.

Maryland—NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards

State of Maryland X

Maryland—NO2 (2010 1-Hour Standard)

Designated area Designation a

Date 1 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.

Maryland—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification

Date 1 Type Date 1 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 1/22/2007 Attainment

Queen Anne's County 1/22/2007 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.

Maryland—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification

Date 1 Type Date 1 Type

Baltimore, MD: 2 Nonattainment Moderate.

Anne Arundel County

Baltimore County

Baltimore City

Carroll County

Harford County

Howard County

Cecil County 2 7/6/2026 Nonattainment 6/3/2016 Marginal.4

Cecil County

Washington, DC-MD-VA: 2 April 15, 2019 Attainment

Calvert County 4/15/2019 Attainment

Charles County 4/15/2019 Attainment

Frederick County 4/15/2019 Attainment

Montgomery County 4/15/2019 Attainment

Prince George's County 4/15/2019 Attainment

AQCR 113 Cumberland-Keyser Interstate 3 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.

Maryland—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification

Date 2 Type Date 2 Type

Baltimore, MD Nonattainment 8/1/2024 Serious.

Anne Arundel County.

Baltimore County.

Carroll County.

Harford County.

Howard County.

City of Baltimore.

Cecil County. 7/6/2026 Nonattainment 7/30/2024 Serious.

Washington, DC-MD-VA Nonattainment 11/7/2022 Moderate.

Calvert County.

Charles County.

Fredrick County.

Montgomery County.

Prince George's County.

Allegany County 1/16/2018 Attainment/Unclassifiable

Caroline County 1/16/2018 Attainment/Unclassifiable

Dorchester County Attainment/Unclassifiable

Garrett County 1/16/2018 Attainment/Unclassifiable

Kent County Attainment/Unclassifiable

Queen Anne's County Attainment/Unclassifiable

St. Mary's County Attainment/Unclassifiable

Somerset County 1/16/2018 Attainment/Unclassifiable

Talbot County Attainment/Unclassifiable

Washington County Attainment/Unclassifiable

Wicomico County 1/16/2018 Attainment/Unclassifiable

Worcester County 1/16/2018 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.

Maryland—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.