Status of SIP Requirements for Designated Areas

North Carolina Areas by Pollutant
As of 06/16/2013
View Nonattainment Contacts

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

North Carolina CO (1971) Areas Return to map
Click on the Area name to view SIP Requirements 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 Effective Date Citation (link to GPO website)	Redesignation Request Date	Redesignation Effective Date Citation (link to GPO website)
Charlotte Area	Maintenance	11/15/1990	Not Classified	919,628	2011	1.5	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	2011	1.4	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	2011	2.1	Yes	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 Requirements 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 Effective Date Citation (link to GPO website)	Redesignation Request Date	Redesignation Effective Date Citation (link to GPO website)
Charlotte-Gastonia Area	Maintenance	11/15/1990	Moderate	1,125,714	2009-2011	0.109	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	2009-2011	0.095	Yes	16 / 16	11/08/1993 58 FR 47391	11/13/1992	11/08/1993 58 FR 47391
Raleigh-Durham Area	Maintenance	01/06/1992	Moderate	1,186,305	2009-2011	0.088	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 Requirements 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 Effective Date Citation (link to GPO website)	Redesignation Request Date	Redesignation Effective Date Citation (link to GPO website)
Charlotte-Gastonia-Rock Hill Area	Nonattainment	06/15/2004	Subpart 2/Moderate	1,789,799	2009-2011	0.079	Yes	53 / 49	04/06/2012 77 FR 13493	11/02/2011
Haywood and Swain Counties (Great Smoky NP) Area	Maintenance	06/15/2004	Former Subpart 1	4,273	2009-2011	0.067	Yes	4 / 2	01/06/2010 74 FR 63995	07/24/2009	01/06/2010 74 FR 63995
Raleigh-Durham-Chapel Hill Area	Maintenance	06/15/2004	Former Subpart 1	1,663,630	2009-2011		Insufficient Data	4 / 2	12/26/2007 72 FR 72948	06/07/2007	12/26/2007 72 FR 72948
Rocky Mount Area	Maintenance	06/15/2004	Former Subpart 1	152,392	2009-2011	0.070	Yes	4 / 2	01/05/2007 71 FR 64891	06/19/2006	01/05/2007 71 FR 64891
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 Requirements 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 Effective Date Citation (link to GPO website)	Redesignation Request Date	Redesignation Effective Date Citation (link to GPO website)
Greensboro-Winston Salem-High Point	Maintenance	04/05/2005		651,284	2009-2011	11.1	Yes	5 / 1	01/04/2010 75 FR 54	12/18/2009	12/19/2011 76 FR 71455
Hickory-Morganton-Lenoir	Maintenance	04/05/2005		154,358	2009-2011	10.6	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 SO2 (1971) 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 Trends website and the EPA Green Book contains comprehensive nonattainment area, designation status, and historical information.

Status of SIP Requirements for Designated Areas

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