SIP Status Reports

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Status of Maryland Designated Areas

Maryland Areas by NAAQS
As of 12/10/2017

Jump to Maryland section for: CO (1971) Lead (1978) Lead (2008) NO2 (1971) Ozone-1Hr (1979) Ozone-8Hr (1997) Ozone-8Hr (2008) PM-10 (1987) PM-2.5 (1997) PM-2.5 (2006) PM-2.5 (2012) SO2 (1971) SO2 (2010)


Maryland CO (1971) Areas    Return to map
 
Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Baltimore Area Maintenance 11/15/1990 Moderate <= 12.7ppm 15,455 2016   No Data 4 / 4 12/15/1995
60 FR 55321
09/20/1995 12/15/1995
60 FR 55321
Washington Area Maintenance 11/15/1990 Moderate <= 12.7ppm 843,775 2016 2.3 Yes 4 / 4 03/15/1996
61 FR 2931
10/12/1995 03/15/1996
61 FR 2931

Maryland Lead (1978) Areas     Return to map Top of page

No designated areas for this pollutant.

Maryland Lead (2008) Areas     Return to map Top of page

No designated areas for this pollutant.

Maryland NO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

Maryland Ozone-1Hr (1979) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Baltimore Area Nonattainment (NAAQS revoked) 11/15/1990 Severe-15 2,662,691 2014-2016 0.097 Yes 29 / 28 07/12/2012
77 FR 34810
   
Kent County and Queen Anne's County Area Maintenance (NAAQS revoked) 01/06/1992 Marginal 67,995 2014-2016 0.085 Yes 7 / 7 03/20/1995
60 FR 3349
02/09/2004 11/22/2004
69 FR 61766
Philadelphia-Wilmington-Trenton Area Nonattainment (NAAQS revoked) 11/15/1990 Severe-15 101,108 2014-2016 0.101 Yes 29 / 28 08/25/2008
73 FR 43360
   
Washington Area Nonattainment (NAAQS revoked) 11/15/1990 Severe-15 2,303,870 2014-2016 0.093 Yes 27 / 26 08/25/2008
73 FR 43360
   
OTR 1990               5 / 4  
 
   
OTR               13 / 13  
 
   

Maryland Ozone-8Hr (1997) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Baltimore Area Nonattainment (NAAQS revoked) 06/15/2004 Subpart 2/Serious 2,662,691 2014-2016 0.073 Yes 58 / 53  
 
   
Kent and Queen Anne's Counties Area Maintenance (NAAQS revoked) 06/15/2004 Subpart 2/Marginal 67,995 2014-2016 0.070 Yes 3 / 2 01/22/2007
71 FR 76920
05/19/2006 01/22/2007
71 FR 76920
Philadelphia-Wilmington-Atlantic City Area Nonattainment (NAAQS revoked) 06/15/2004 Subpart 2/Moderate 101,108 2014-2016 0.077 Yes 53 / 52 04/25/2012
77 FR 17341
   
Washington Area Nonattainment (NAAQS revoked) 06/15/2004 Subpart 2/Moderate 2,303,870 2014-2016 0.072 Yes 53 / 51 03/29/2012
77 FR 11739
   
OTR               46 / 43  
 
   

Maryland Ozone-8Hr (2008) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Baltimore Nonattainment 07/20/2012 Moderate 2,662,691 2014-2016 0.073 Yes 54 / 1 07/01/2015
80 FR 30941
   
Philadelphia-Wilmington-Atlantic City Nonattainment 07/20/2012 Marginal 101,108 2014-2016 0.077 No 3 / 1 12/04/2017
82 FR 50814
   
Washington Nonattainment 07/20/2012 Marginal 2,303,870 2014-2016   Insufficient Data 3 / 2  
 
   
OTR               47 / 2  
 
   

Maryland PM-10 (1987) Areas     Return to map Top of page

No designated areas for this pollutant.

Maryland PM-2.5 (1997) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(µg/m3)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Baltimore Maintenance (NAAQS revoked) 04/05/2005 Moderate 2,662,691 2014-2016 9.5 Yes 6 / 1 06/21/2012
77 FR 30208
12/23/2013 12/16/2014
79 FR 75031
Martinsburg-Hagerstown Maintenance (NAAQS revoked) 04/05/2005 Moderate 147,430 2014-2016 9.9 Yes 6 / 1 02/09/2012
77 FR 1411
12/23/2013 12/16/2014
79 FR 75035
Washington Maintenance (NAAQS revoked) 04/05/2005 Moderate 2,215,133 2014-2016 9.1 Yes 6 / 1 02/09/2012
77 FR 1411
07/17/2013 11/05/2014
79 FR 60081

Maryland PM-2.5 (2006) Areas     Return to map Top of page

No designated areas for this pollutant.

Maryland PM-2.5 (2012) Areas     Return to map Top of page

No designated areas for this pollutant.

Maryland SO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

Maryland SO2 (2010) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
3 Year
1-⁠Hour
Design Value
(ppb)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Anne Arundel County and Baltimore County Nonattainment 09/12/2016   990,333 2014-2016   No Data 6 / 0  
 
   
We have made our best effort to ensure that the data contained in these reports is accurate. We note that there may be brief delays in updating the reports as we receive new state submissions and we take rulemaking action on plans. In order to assist us in providing accurate information, we request that you contact us by clicking on the "Contact Us" link near the top of this page with any comments regarding or corrections to the posted information, including concerns about whether the entries reflect the most recent status.

Current and historical design value data can be found on the EPA Air Quality Design Values website and the EPA Green Book contains comprehensive nonattainment area, designation status, and historical information.

The level of the 1-hour NAAQS for sulfur dioxide is 75 parts per billion (ppb) calculated as the 3-year average of the 99th percentile of the annual distribution of daily maximum 1-hour average concentrations.