SIP Status Reports

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Status of North Carolina Designated Areas

North Carolina Areas by NAAQS
As of 10/15/2017

Jump to North Carolina 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)


North Carolina 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
Charlotte Area Maintenance 11/15/1990 Not Classified 919,628 2016 1 Yes 1 / 1 09/18/1995
60 FR 39258
10/07/1994 09/18/1995
60 FR 39258
Raleigh-Durham Area Maintenance 01/06/1992 Moderate <= 12.7ppm 1,168,580 2016 1.5 Yes 4 / 4 09/18/1995
60 FR 39258
10/07/1994 09/18/1995
60 FR 39258
Winston-Salem Area Maintenance 01/06/1992 Moderate <= 12.7ppm 350,670 2016   No Data 4 / 4 11/07/1994
59 FR 48399
05/02/1994 11/07/1994
59 FR 48399

North Carolina Lead (1978) Areas     Return to map Top of page

No designated areas for this pollutant.

North Carolina Lead (2008) Areas     Return to map Top of page

No designated areas for this pollutant.

North Carolina NO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

North Carolina 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
Charlotte-Gastonia Area Maintenance (NAAQS revoked) 11/15/1990 Moderate 1,125,714 2014-2016 0.090 Yes 23 / 23 07/05/1995
60 FR 34859
11/12/1993 07/05/1995
60 FR 34859
Greensboro-Winston-Salem-High Point Area Maintenance 01/06/1992 Moderate 1,001,955 2014-2016 0.084 Yes 16 / 16 11/08/1993
58 FR 47391
11/13/1992 11/08/1993
58 FR 47391
Raleigh-Durham Area Maintenance (NAAQS revoked) 01/06/1992 Moderate 1,186,305 2014-2016 0.078 Yes 22 / 22 06/17/1994
59 FR 18300
11/13/1992 06/17/1994
59 FR 18300

North Carolina 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
Charlotte-Gastonia-Rock Hill Area Maintenance (NAAQS revoked) 06/15/2004 Subpart 2/Moderate 1,789,799 2014-2016 0.070 Yes 53 / 51 04/06/2012
77 FR 13493
11/02/2011 01/02/2014
78 FR 72036
Haywood and Swain Counties (Great Smoky NP) Area Maintenance (NAAQS revoked) 06/15/2004 Former Subpart 1 4,273 2014-2016 0.065 Yes 4 / 2 01/06/2010
74 FR 63995
07/24/2009 01/06/2010
74 FR 63995
Raleigh-Durham-Chapel Hill Area Maintenance (NAAQS revoked) 06/15/2004 Former Subpart 1 1,663,630 2014-2016 0.065 Yes 4 / 2 12/26/2007
72 FR 72948
06/07/2007 12/26/2007
72 FR 72948
Rocky Mount Area Maintenance (NAAQS revoked) 06/15/2004 Former Subpart 1 152,392 2014-2016   Insufficient Data 4 / 2 01/05/2007
71 FR 64891
06/19/2006 01/05/2007
71 FR 64891

North Carolina 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
Charlotte-Rock Hill Maintenance 07/20/2012 Marginal 1,723,605 2014-2016 0.070 Yes 3 / 2 06/03/2016
81 FR 26697
04/16/2015 08/27/2015
80 FR 44873

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

No designated areas for this pollutant.

North Carolina 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
Greensboro-Winston Salem-High Point Maintenance (NAAQS revoked) 04/05/2005 Former Subpart 1 651,284 2014-2016 9.0 Yes 5 / 1 01/04/2010
75 FR 54
12/18/2009 12/19/2011
76 FR 71455
Hickory-Morganton-Lenoir Maintenance (NAAQS revoked) 04/05/2005 Former Subpart 1 154,358 2014-2016 8.9 Yes 5 / 1 01/05/2010
75 FR 230
12/18/2009 12/19/2011
76 FR 71452

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

No designated areas for this pollutant.

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

No designated areas for this pollutant.

North Carolina SO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

North Carolina 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.