SIP Status Reports

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Status of Delaware Designated Areas

Delaware Areas by NAAQS
As of 10/15/2017

Jump to Delaware 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)


Delaware CO (1971) Areas     Return to map
 
No designated areas for this pollutant.

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

No designated areas for this pollutant.

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

No designated areas for this pollutant.

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

No designated areas for this pollutant.

Delaware 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
Philadelphia-Wilmington-Trenton Area Nonattainment (NAAQS revoked) 11/15/1990 Severe-15 700,789 2014-2016 0.101 Yes 30 / 29 08/25/2008
73 FR 43360
   
Sussex County Area Nonattainment (NAAQS revoked) 01/06/1992 Marginal 197,145 2014-2016 0.081 Yes 8 / 8 03/20/1995
60 FR 3349
   
OTR 1990               5 / 5  
 
   
OTR               13 / 13  
 
   

Delaware 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
Philadelphia-Wilmington-Atlantic City Area Nonattainment (NAAQS revoked) 06/15/2004 Subpart 2/Moderate 897,934 2014-2016 0.077 Yes 53 / 53 04/25/2012
77 FR 17341
   
OTR               46 / 46  
 
   

Delaware 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
Philadelphia-Wilmington-Atlantic City Nonattainment 07/20/2012 Marginal 538,479 2014-2016 0.077 No 3 / 1  
 
   
Seaford Nonattainment 07/20/2012 Marginal 197,145 2014-2016 0.069 Yes 3 / 1 06/03/2016
81 FR 26697
   
OTR               47 / 0  
 
   

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

No designated areas for this pollutant.

Delaware 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
Philadelphia-Wilmington Maintenance (NAAQS revoked) 04/05/2005 Moderate 538,479 2014-2016 11.5 Yes 6 / 5 06/15/2012
77 FR 28782
12/14/2012 09/04/2014
79 FR 45350

Delaware PM-2.5 (2006) Areas    Return to map
Area designated nonattainment for the 24-hour standard     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
24-Hr
(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
Philadelphia-Wilmington Maintenance 12/14/2009 Moderate 538,479 2014-2016 27 Yes 6 / 2 01/07/2013
78 FR 882
12/14/2012 09/04/2014
79 FR 45350

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

No designated areas for this pollutant.

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

No designated areas for this pollutant.

Delaware 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.