Conformity Adequacy Review: Region 4

State Implementation Plans (SIP) Submissions that EPA has Found Adequate or Inadequate
Region 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, and Tennessee

On this page:

Alabama
Georgia
Kentucky
Mississippi
North Carolina
South Carolina
Tennessee

For more information about adequacy review, return to the main adequacy page.

Contacts: For the Region 4 contacts (name, phone number, email address), see EPA’s Regional Contacts for State and Local Transportation.

Alabama
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Birmingham	pm2.5	maintenance plan	Adequate (2/25/2013) FR Notice (1/25/2013) (pdf) (262 KB, published January 25, 2013)	2006 24-hour pm2.5 budgets found adequate through the SIP approval process.
		maintenance plan	Adequate (2/22/2013) FR Notice (1/22/2013) (pdf) (275 KB, published January 22, 2013)	1997 annual pm2.5 budgets found adequate through the SIP approval process.
		reasonable further progress and attainment demonstration	Withdrawn (3/01/2013)
	8-hour ozone	maintenance plan	Letter (3/2006) (pdf) (55.08 KB, February 2, 2006) Adequacy letter FR Notice (2/2006) (pdf) (142 KB, published February 23, 2006)	Budgets found adequate through the adequacy review process.
Alabama Portion (Jackson County) of Chattanooga Area, AL-GA-TN	pm2.5	maintenance plan	FR Notice (12/2014) (pdf) (255 KB, published December 22, 2014)	Regional insignificance finding for PM2.5 and NOx made through the SIP approval process.
	pm2.5	attainment plan	Letter (7/2010) (pdf) (81.1 KB, March 25, 2000) Adequacy letter and FR Notice (6/2010) (pdf) (144 KB, published June 18, 2010)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.

Georgia
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Atlanta	2015 8-hour ozone	maintenance plan	Adequate (11/17/22) FR Notice (10/2022) (pdf) (267 KB, published October 17, 2022)	Budgets found adequate through SIP approval process.
	1997 pm2.5	maintenance plan	Adequate (2/24/16) FR Notice (2/2016) (pdf) (251 KB, published February 24, 2016)	Budgets found adequate through the SP approval process
	2008 8-hour ozone	maintenance plan	Adequate (8/11/15) FR Notice (8/2015) (pdf) (255 KB, published August 11, 2015)	Budgets found adequate through the SIP approval process
	1997 8-hour ozone	maintenance plan	Adequate (12/2/2013) FR Notice (12/2013) (pdf) (329 KB, published December 2, 2013)	Budgets found adequate through the SIP approval process.
		attainment plan	Withdrawn
		reasonable further progress	Adequate (11/4/2013) FR Notice (11/2013) (pdf) (250 KB, published November 4, 2013)	Budgets found adequate through the SIP approval process.
		early progress SIP	Adequate (4/9/2007) FR Notice (4/2007) (pdf) (151 KB, published April 9, 2007)	Budgets found adequate through the adequacy review process.
Chattanooga GA-AL-TN	1997 pm2.5	maintenance plan	Adequate (12/19/2014) FR Notice (12/2014) (pdf) (287 KB, published December 19, 2014)	Budgets found adequate through SIP approval process.
Macon	1997 pm2.5	maintenance plan	Adequate (5/13/2014) FR Notice (5/2014) (pdf) (256 KB, published May 13, 2014)	Budgets found adequate through SIP approval process.
Macon	8-hour ozone	maintenance plan	Adequate (9/19/2007) FR Notice (9/2007) (pdf) (161 KB, published September 19, 2007)	Budgets found adequate through SIP approval process.
Murray County	8-hour ozone	maintenance plan	Adequate (10/16/2007) FR Notice (10/2007) (pdf) (164 KB, published October 16, 2007)	Budgets found adequate through SIP approval process.
Rome	1997 pm2.5	maintenance plan	Adequate (5/14/2014) FR Notice (5/2014) (pdf) (267 KB, published May 14, 2014)	Budgets found adequate through SIP approval process.

Kentucky
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Boyd County	8-hour ozone	maintenance plan	Adequate (8/3/2007) FR Notice (8/2007) (pdf) (158 KB, published August 3, 2007)	Budgets found adequate through SIP approval process.
Christian County (Clarksville-Hopkins Area)	8-hour ozone	maintenance plan	Adequate (1/25/2006) FR Notice (1/2006) (pdf) (154 KB, published January 25, 2006)	Budgets found adequate through SIP approval process.
Cincinnati - Hamilton (IN - KY - OH)	pm2.5	maintenance plan	Adequate (12/15/2011) FR Notice (12/2011) (pdf) (171 KB, published December 15, 2011)	Budgets found adequate through SIP approval process.
	pm2.5	attainment plan	Withdrawn (9/30/2011) Letter (9/2011) (pdf) (92.18 KB) September 30, 2011
	2015 8-hour ozone	maintenance plan	Adequate (10/4/2023) FR Notice (10/2023) (pdf) (282 KB, published October 4, 2023)	Budgets found adequate through the SIP approval process.
	2008 8-hour ozone	maintenance plan	Adequate (7/5/2017) FR Notice (7/2017) (pdf) (263 KB, published July 5, 2017)	Budgets found adequate through the SIP approval process.
	1997 8-hour ozone	maintenance plan	Adequate (6/5/2013) FR Notice (6/2013) (pdf) (254 KB, published June 5, 2013)	Budgets found adequate through SIP approval process.
	1997 8-hour ozone	maintenance plan	Adequate (8/5/2010) FR Notice (8/2010) (pdf) (170 KB, published August 5, 2010)	Budgets found adequate through SIP approval process.
	8-hour ozone	attainment demonstration	Letter (5/2008) (pdf) (81.09 KB) March 14, 2008 and FR Notice (4/2008) (pdf) (142 KB, published April 28, 2008)	Budgets found adequate through the adequacy review process.
Huntington-Ashland	pm2.5	maintenance plan	Adequate (12/26/2012) FR Notice (12/2012) (pdf) (256 KB, published December 26, 2012)	Regional insignificance finding for PM2.5 and NOx made through the SIP approval process.
Huntington-Ashland	pm2.5	attainment plan	Letter (7/6/2010) (pdf) (76.58 KB) March 23, 2010 and FR Notice (6/2010) (pdf) (144 KB, published June 18, 2010)	Budgets found adequate through the adequacy review process.
Bi-state Louisville	1997 pm2.5	maintenance plan	Adequate (4/7/2017) FR Notice (4/2017) (pdf) (157 KB, published April 7, 2017)	Budgets found adequate through the SIP approval process.
	1997 pm2.5	attainment plan	Withdrawn (9/30/2011) Letter (9/2011) (pdf) (92.18 KB) September 30, 2011	Budgets found adequate through the SIP approval process.
	8-hour ozone	maintenance plan	Letter (7/2007) (pdf) (71.91 KB) June 18, 2007 and FR Notice (7/2007) (pdf) (145 KB, published July 24, 2007)	Budgets found adequate through the SIP approval process.

Mississippi
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Desoto County	2008 8-hour ozone	maintenance plan	Adequate (4/8/2016) FR Notice (4/2016) (pdf) (236 KB, published April 8, 2016)	Budgets found adequate through the SIP approval process.

North Carolina
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Charlotte	2008 8-hour ozone	maintenance plan	Adequate (7/28/2015) FR Notice (7/2015) (pdf) (293 KB, published July 28, 2015)	Budgets found adequate through the SIP approval process.
	1997 8-hour ozone	maintenance plan	Adequate (8/28/2013) FR Notice (8/2013) (pdf) (186 KB, published August 13, 2013)	Budgets found adequate through the adequacy review process.
		reasonable further progress plan	Letter (3/2010) (pdf) (104.81 KB) January 12, 2010 and FR Notice (2/2010) (pdf) (145 KB, published February 19, 2010)	Budgets found adequate through the adequacy review process.
		reasonable further progress plan	Withdrawn	RFP plan (insignificance) replaced with VOC budgets. New adequacy review started on 12/03/09
		attainment plan	Letter (2/2012) (pdf) (193.8 KB) February 10, 2012
		attainment plan	Withdrawn Letter (12/2008) (pdf) (136.83 KB) December 19, 2008
	carbon monoxide	maintenance plan	Letter (5/2005) (pdf) (37.55 KB) April 29, 2005 and FR Notice (5/2005) (pdf) (145 KB, published May 6, 2005)	Budgets found adequate through the adequacy review process.
Great Smoky Mountain National Park	8-hour ozone	maintenance plan	Adequate (12/7/2009) FR Notice (12/2009) (pdf) (151 KB, published December 7, 2009)	Budgets found adequate through the SIP approval process.
Greensboro - Winston - Salem - Highpoint	pm2.5	maintenance plan	Letter (5/2011) (pdf) (70.48 KB) February 2, 2011 and FR Notice (5/2011) (pdf) (148 KB, published May 2, 2011)	Budgets found adequate through the the adequacy review process.
Greensboro - Winston - Salem - Highpoint	pm2.5	attainment plan	Withdrawn Letter (5/2011) (pdf) (193.8 KB) February 10, 2012	Replaced by the maintenance plan.
Hickory	pm2.5	maintenance plan	Letter (2/2011) (pdf) (116.53 KB) February 3, 2011 and FR Notice (5/2011) (pdf) (152 KB, published May, 2011)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Hickory	pm2.5	attainment plan	Letter (1/2010) (pdf) (88.82 KB) January 20, 2010 FR Notice (5/2010) (pdf) (146 KB, published May 12, 2010) FR Notice (3/2010) (pdf) (144 KB, published March 1, 2010)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Raleigh - Durham and Chapel Hill	8-hour ozone	maintenance plan	Adequate (12/26/2007) FR Notice (12/2007) (pdf) (169 KB, published December 26, 2007)	Budgets found adequate through the SIP approval process.
Rocky Mount	8-hour ozone	maintenance plans	Adequate (11/26/2012) FR Notice (9/2012) (pdf) (263 KB, published September 27, 2012)	Budgets found adequate through SIP approval process.
Rocky Mount	8-hour ozone	maintenance plans	Adequate (1/5/2007) FR Notice (11/2006) (pdf) (195 KB, published November 6, 2006)	Budgets found adequate through SIP approval process.

South Carolina
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Charlotte (York County)	2008 8-hour ozone	maintenance plan	Adequate (12/11/2015) FR Notice (12/2015) (pdf) (241 KB, published December 11, 2015)	Budgets found adequate through the SIP approval process.
	1997 8-hour ozone	maintenance plan	Adequate (10/9/2012) FR Notice (9/2012) (pdf) (191 KB, published September 24, 2012)	Budgets found adequate through the adequacy review process.
		reasonable further progress plan	Letter (5/2012) (pdf) (80.31 KB) May 25, 2012 and FR Notice (6/2012) (pdf) (211 KB, published June 6, 2012) Response to Comments (pdf) (140.9 KB, May 2012)	Budgets found adequate through the adequacy review process.
		reasonable further progress plan	Revised	In December 2009 EPA requested additional information regarding the reasonable further progress plan. The revised budgets were provided in the May 5, 2010 SIP submission and posted for adequacy review on May 13, 2010.
		attainment plan	Withdrawn Letter (1/2012) (pdf) (590.38 KB) January 12, 2012
		attainment plan	Withdrawn Letter (12/2008) (pdf) (155.41 KB, ) December 22, 2008

Tennessee
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Chattanooga Area	1997 pm2.5	maintenance plan	Adequate (11/4/2015) FR Notice (11/2015) (pdf) (283 KB, published November 4, 2015)	Budgets found adequate through the SIP approval process.
Knoxville	2006 pm2.5	maintenance plan	Letter (3/2017) (pdf) (399.7 KB) February 15, 2017 FR Notice (3/2017) (pdf) (187 KB, published March 10, 2017)	Budgets found adequate through the adequacy review process
	1997 pm2.5	maintenance plan	Letter (2/2017) (pdf) (397.95 KB) February 15, 2017 and FR Notice (12/2012) (pdf) (256 KB, published December 26, 2012)	Budgets found adequate through the adequacy review process.
	1997 pm2.5	attainment plan	Letter (4/2010) (pdf) (76.31 KB, February 11, 2010) Adequacy letter and FR Notice (4/2010) (pdf) (144 KB, published April 7, 2010)	Budgets found adequate through the adequacy review process.
	2008 8-hour ozone	maintenance plan	Adequate (7/13/2015) FR Notice (7/2015) (pdf) (262 KB, published July 13, 2015)	Budgets found adequate through the SIP approval process.
	1997 8-hour ozone	maintenance plan	Letter (7/2010) (pdf) (63.79 KB) July 20, 2010 and FR Notice (9/2010) (pdf) (153 KB, published September 15, 2010)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	maintenance plan	Letter (2/2009) (pdf) (38.69 KB) February 10, 2009	Posted for adequacy on 03/06/07.
Memphis/Shelby County	2008 8-hour ozone	maintenance plan	Adequate (6/23/2016) FR Notice (6/2016) (pdf) (242 KB, published June 23, 2016)	Budgets found adequate through the SIP approval process
	1997 8-hour ozone	maintenance plans	Adequate (11/27/2009) FR Notice (11/2009) (pdf) (142 KB, published November 12, 2009)	Budgets found adequate through the adequacy review process.
	carbon monoxide	maintenance plans	Adequate (10/25/2006) FR Notice (10/2006) (pdf) (161 KB, published October 25, 2006)	Budgets found adequate through SIP approval process.
Montgomery County	8-hour ozone	maintenance plan	Adequate (11/21/2005) FR Notice (9/2005) (pdf) (184 KB, published September 22, 2005)	Budgets found adequate through the SIP approval process.