Conformity Adequacy Review: Region 6

State Implementation Plans (SIP) Submissions that EPA has Found Adequate or Inadequate
Region 6: Arkansas, Louisiana, New Mexico, Oklahoma, Texas

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

Contacts: For the Region 6 contact person (name, phone number, email address), see EPA’s Regional Contacts for State and Local Transportation.

Arkansas
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Crittenden County	2008 8-hour ozone	maintenance plan	Adequate (04/25/2016) FR Notice (4/2016) (pdf) (242 KB, published April 25, 2016)	Budgets found adequate through the SIP approval process
Crittenden County	8-hour ozone	maintenance plan	Adequate (5/22/2009) Letter (4/2009) (pdf) (360.91 KB) April 20, 2009 FR Notice (5/2009) (pdf) (143 KB, published May 7, 2009)	Budgets found adequate through the adequacy review process.
Louisiana
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Baton Rouge	2008 8-hour ozone	maintenance plan	Adequate (07/14/2016) FR Notice (6/2016) (pdf) (192 KB, published June 29, 2016) Letter (6/2016) (pdf) (535.96 KB) June 13, 2016	Budgets found adequate through the adequacy review process
Baton Rouge	8-hour ozone	maintenance plan	Adequate (11/30/2011) FR Notice (11/2011) (pdf) (152 KB, published November 30, 2011)	Budgets found adequate through SIP approval process.
New Mexico
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Albuquerque	carbon monoxide	limited maintenance plan	Adequate (6/13/2005) FR Notice (4/2005) (pdf) (168 KB, published April 14, 2005)	Budgets found adequate through SIP approval process.
Albuquerque	carbon monoxide	maintenance plan	Adequate (8/21/2003) Letter (7/2003) (pdf) (12.2 KB) July 15, 2003 FR Notice (8/2003) (pdf) (133 KB, published August 6, 2003)	Budgets found adequate through the adequacy review process.
Texas
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Beaumont - Port Arthur	8-hour ozone	maintenance plan	Adequate (3/6/2013) FR Notice (2/2013) (pdf) (237 KB, published February 4, 2013)	Budgets found adequate through the SIP approval process.
Beaumont - Port Arthur	8-hour ozone	maintenance plan	Adequate (4/16/2010) Letter (3/2010) (pdf) (81.92 KB) March 4, 2010 FR Notice (4/2010) (pdf) (144 KB, published April 1, 2010)	Budgets found adequate through the adequacy review process.
Dallas/Fort Worth	2008 8-hour ozone	attainment demonstration	N/A – no adequacy finding made	Dallas has been reclassified to Severe. This attainment demonstration was for the Serious classification and is therefore no longer required.
		reasonable further progress plan	Adequate (5/4/2023) FR Notice (4/2023)(pdf) (281 KB, published April 24, 2023)	Budgets found adequate through the SIP approval process.
		attainment plan	Adequate (11/23/2016) FR Notice (11/2016) (pdf) (188 KB, published November 8, 2016) Letter (10/2016) (pdf) (544.34 KB) October 17, 2016	Budgets found adequate through the adequacy review process
		reasonable further progress plan	Adequate (1/26/2016) FR Notice (1/2016) (pdf) (212 KB, published January 11, 2016) Letter (12/2015) (pdf) (254.68 KB) December 10, 2015	Budgets found adequate through the adequacy review process
	1997 8-hour ozone	attainment plan and reasonable further progress plan	Adequate (2/19/2013) Letter (12/2012) (pdf) (451.25 KB) December 27, 2012 FR Notice (2/2013) (pdf) (212 KB, published February 1, 2013)	Budgets found adequate through the adequacy review process.
		attainment plan and reasonable further progress plan	Adequate (4/7/2008) Letter (10/2007) (pdf) (72.18 KB) October 24, 2007 FR Notice (3/2008) (pdf) (147 KB, published March 21, 2008)	Budgets found adequate through the adequacy review process.
		5% increment of progress	Adequate (6/16/2005) Letter (5/2005) (pdf) (88.83 KB) May 16, 2005 < FR Notice (6/2005) (pdf) (141 KB, published June 1, 2005)	Budgets found adequate through the adequacy review process.
El Paso	carbon monoxide	maintenance plan	Adequate (10/3/2008) FR Notice (8/2008) (pdf) (173 KB, published August 4, 2008)	Budgets found adequate through the SIP approval process.
		maintenance plan	Adequacy finding withdrawn (3/26/2007) FR Notice (3/2007) (pdf) (144 KB, published March 26, 2007)	Effective date of withdrawal is March 26, 2007.
		section 179B international border plan	Adequate (11/1/1999) Letter (9/1999) (pdf) (9.45 KB) September 1, 1999 FR Notice (10/1999) (pdf) (113 KB, published October 15, 1999)	Budgets found adequate through the adequacy review process.
Houston - Galveston - Brazoria	2008 8-hour ozone	reasonable further progress plan	Adequate (6/9/2021) FR Final rule (5/2021) (pdf) (240 KB, published May 10, 2021)	Budgets found adequate through the SIP approval process
		attainment demonstration	N/A – no adequacy finding made	Houston area has been reclassified to Severe. This attainment demonstration was for the Serious classification, and is therefore no longer required.
		reasonable further progress	Adequate (6/21/17) Letter (4/2017) (pdf) (391.85 KB) April 28, 2017 FR Notice (6/2017) (pdf) (196 KB, published June 6, 2017)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	reasonable further progress plan and attainment demonstration	Adequate (8/19/2013) Adequate Letter (8/19/2013) (pdf) (2.05 MB, July 17, 2013) FR Notice (8/2013) (pdf) (211 KB, published August 2, 2013)	Budgets found adequate through the adequacy review process.
			Adequate (2/9/2011) Letter (10/2010) (pdf) (38.79 KB) October 8, 2010 FR Notice (1/2011) (pdf) (150 KB, published January 25, 2011)	Budgets found adequate through the adequacy review process.
		reasonable further progress plan	Adequate (4/7/2008) Letter (10/2007) (pdf) (72.18 KB) October 24, 2007 FR Notice (3/2008) (pdf) (147 KB, published March 21, 2008)	Budgets found adequate through the adequacy review process.