SIP Status Reports

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Status of District of Columbia Designated Areas

District of Columbia Areas by NAAQS
As of 11/19/2017

Jump to District of Columbia 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)


District of Columbia 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
Washington Area Maintenance 11/15/1990 Moderate <= 12.7ppm 601,723 2016 2.3 Yes 4 / 4 03/15/1996
61 FR 2931
10/12/1995 03/15/1996
61 FR 2931

District of Columbia Lead (1978) Areas     Return to map Top of page

No designated areas for this pollutant.

District of Columbia Lead (2008) Areas     Return to map Top of page

No designated areas for this pollutant.

District of Columbia NO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

District of Columbia 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
Washington Area Nonattainment (NAAQS revoked) 11/15/1990 Severe-15 601,723 2014-2016 0.093 Yes 27 / 27 08/25/2008
73 FR 43360
   
OTR 1990               5 / 5  
 
   
OTR               13 / 13  
 
   

District of Columbia 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
Washington Area Nonattainment (NAAQS revoked) 06/15/2004 Subpart 2/Moderate 601,723 2014-2016 0.072 Yes 53 / 52 03/29/2012
77 FR 11739
   
OTR               46 / 45  
 
   

District of Columbia 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
Washington Nonattainment 07/20/2012 Marginal 601,723 2014-2016   Insufficient Data 3 / 1  
 
   
OTR               47 / 0  
 
   

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

No designated areas for this pollutant.

District of Columbia 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
Washington Maintenance (NAAQS revoked) 04/05/2005 Moderate 601,723 2014-2016 9.1 Yes 6 / 1 02/09/2012
77 FR 1411
06/11/2013 11/05/2014
79 FR 60081

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

No designated areas for this pollutant.

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

No designated areas for this pollutant.

District of Columbia SO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

District of Columbia SO2 (2010) Areas     Return to map Top of page

No designated areas for this pollutant.
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.