SIP Status Reports
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Status of District of Columbia Designated Areas
Status of District of Columbia Designated Areas
District of Columbia Areas by NAAQSNOTE: As of 03/12/2021, these reports are no longer being updated. For the latest information, see the SIP Status Tools.
Jump to District of Columbia section for: CO (1971) Lead (1978) Lead (2008) NO2 (1971) Ozone-1Hr (1979) Ozone-8Hr (1997) Ozone-8Hr (2008) Ozone-8Hr (2015) 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 |
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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 | 2019 | 1.9 | Yes | 4 / 4 | |
10/12/1995 | 03/15/1996 61 FR 2931 |
District of Columbia Lead (1978) Areas Return to map Top of page |
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No designated areas for this pollutant. | |||||||||||
District of Columbia Lead (2008) Areas Return to map Top of page |
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No designated areas for this pollutant. | |||||||||||
District of Columbia NO2 (1971) Areas Return to map Top of page |
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No designated areas for this pollutant. | |||||||||||
District of Columbia Ozone-1Hr (1979) Areas Return to map Top of page |
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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 | 2017-2019 | 0.096 | Yes | 27 / 27 | 08/25/2008 73 FR 43360 |
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OTR 1990 | 5 / 5 | |
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OTR | 13 / 13 | |
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District of Columbia Ozone-8Hr (1997) Areas Return to map Top of page |
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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 | 2017-2019 | 0.072 | Yes | 53 / 52 | 03/29/2012 77 FR 11739 |
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OTR | 46 / 46 | |
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District of Columbia Ozone-8Hr (2008) Areas Return to map Top of page |
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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 | Maintenance | 07/20/2012 | Marginal | 601,723 | 2017-2019 | 0.072 | Yes | 3 / 2 | 12/14/2017 82 FR 52651 |
03/12/2018 | 08/15/2019 84 FR 33855 |
OTR | 47 / 46 | |
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District of Columbia Ozone-8Hr (2015) Areas Return to map Top of page |
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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 | 08/03/2018 | Marginal | 601,723 | 2017-2019 | 0.072 | No | 3 / 0 | |
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OTR | 46 / 1 | |
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District of Columbia PM-10 (1987) Areas Return to map Top of page |
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No designated areas for this pollutant. | |||||||||||
District of Columbia PM-2.5 (1997) Areas Return to map Top of page |
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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 | 2017-2019 | 9.5 | 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 |
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No designated areas for this pollutant. | |||||||||||
District of Columbia PM-2.5 (2012) Areas Return to map Top of page |
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No designated areas for this pollutant. | |||||||||||
District of Columbia SO2 (1971) Areas Return to map Top of page |
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No designated areas for this pollutant. | |||||||||||
District of Columbia SO2 (2010) Areas Return to map Top of page |
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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. |