Conformity Adequacy Review: Region 9

State Implementation Plans (SIP) Submissions that EPA has Found Adequate or Inadequate
Region 9: Arizona, California, Hawaii, Nevada, and
the territories of Guam and American Samoa

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

On this page:

Arizona
California
Nevada

Contacts: Karina O'Connor, (CA, NV) at 775-434-8176 or
John J. Kelly, (CA) at 415-947-4151 or
Lindsay Wickersham, (AZ) at 415-947-4192 or
Michael Dorantes, (CA) at 415-792-3934 or
R9.adequacy@epa.gov, U.S. EPA Region 9, 75 Hawthorne St., San Francisco, CA 94105.

Arizona
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Ajo, AZ	1987 PM10	maintenance plan	Adequate (8/4/2020) Final FR (8/2020) (pdf) (242 KB, published August 4, 2020)	Budgets found adequate through the SIP approval process.
Bullhead City	pm10	limited maintenance plan	Adequate (8/26/2002) FR Notice (6/2002) (pdf) (162 KB, published June 26, 2002)	Budgets found adequate through SIP approval process.
Miami	pm10	limited maintenance plan		Adequacy not completed on PM10 maintenance plan budgets. SIP submittal dated July 2008.
Phoenix-Mesa	2008 8-hour ozone	attainment demonstration	Adequate (7/2/2020) FR Notice (6/2020) (pdf) (255 KB, published June 2, 2020)	Budgets found adequate through the SIP approval process.
	2008 8-hour ozone	attainment demonstration	Adequate (6/13/2012) FR Notice (6/2012) (pdf) (238 KB, published June 13, 2012)	Budgets found adequate through SIP approval process.
	1997 8-hour ozone	attainment demonstration	Adequate (11/9/2007) Letter (10/2007) (pdf) (99.06 KB) October 2007 FR Notice (10/2007) (pdf) (141 KB, published October 25, 2007)	Budgets found adequate through the adequacy review process.
Nogales	pm10	attainment demonstration	Adequate (9/25/2012) FR Notice (9/2012) (pdf) (289 KB, published September 25, 2012)	Budgets found adequate through SIP approval process.
Nogales	2006 pm2.5	maintenance plan and redesignation	Adequate (printed 8/15/2022) FR Notice (8/2022) (pdf) (268 KB, published August 15, 2022)	Budgets found adequate through the SIP approval process.
Payson City	pm10	limited maintenance plan	Adequate (5/19/2014) FR Notice (3/2014) (pdf) (284 KB, published March 19, 2014)	Budgets found adequate through the SIP approval process.
Payson City	pm10	limited maintenance plan	Adequate (8/26/2002) FR Notice (6/2002) (pdf) (162 KB, published June 26, 2002)	Budgets found adequate through SIP approval process.
Pima County	carbon monoxide	maintenance plan	Adequate (12/8/1999) Letter 1 (9/1999) (pdf) (84.07 KB) September 30, 1999 Letter 2 (9/1999) (pdf) (83.11 KB) September 30, 1999 FR Notice (11/1999) (pdf) (114 KB, published November 23, 1999)	Budgets found adequate through the adequacy review process.
Phoenix (Maricopa and Pinal Counties)	pm10	5% plan	Adequate (12/20/2013) Letter (11/2013) (pdf) (2.38 MB) November 22, 2013 FR Notice (12/2013) (pdf) (175 KB, published December 5, 2013 )	Budgets found adequate through the adequacy review process.
		5% plan	Withdrawn (1/31/2011) Withdrawn Letter (1/2011) (pdf) (65.48 KB) January 31, 2011	Budgets previously found adequate on the 7/1/08 FR Notice (6/2008) (pdf) (148 KB, published June 16, 2008)
		attainment demonstration	Adequate (4/21/2000) Adequate Letter (3/2000) (pdf) (67.32 KB) March 29, 2000 FR Notice (4/2000) (pdf) (210 KB, published April 6, 2000)	PM10 budget for Maricopa County applies to entire non-attainment area including Pinal County. Budgets found adequate through the adequacy review process.
		attainment demonstration	Inadequate (12/27/1999) Letter (12/1999) (pdf) (995.55 KB) December 1, 1999 FR Notice (12/1999) (pdf) (210 KB, published December 10, 1999)
Phoenix (Maricopa County)	carbon monoxide	maintenance plan	Adequate (3/3/2016) FR Notice (3/2016) (pdf) (220 KB, published March 3, 2016)	Budgets found adequate through the SIP approval process.
		maintenance plan	Adequate (10/14/2003) Letter (9/2003) (pdf) (22.68 KB) September 9, 2003 FR Notice (9/2003) (pdf) (132 KB, published September 29, 2003)	Budgets found adequate through the adequacy review process.
		attainment demonstration (serious area)	Adequate (11/1/2001) Letter (9/2001) (pdf) (80.45 KB) September 26, 2001 FR Notice (20/2001) (pdf) (127 KB, published October 17, 2001)	Revision to budget from 12/14/99. Budgets found adequate through the adequacy review process.
		attainment demonstration (serious area)	Adequate (12/14/1999) Letter (11/1999) (pdf) (850.19 KB) November 5, 1999 FR Notice (11/1999) (pdf) (107 KB, published November 29, 1999)	Budgets found adequate through the adequacy review process.
		attainment demonstration (moderate area)	Inadequate (5/5/1999)	Determination made under old process
Tucson	carbon monoxide	limited maintenance plan	Adequate (12/21/2009) FR Notice (12/2009) (pdf) (144 KB, published December 21, 2009)	Budgets found adequate through the SIP approval process.
Yuma County	pm10	maintenance plan	Inadequate (6/16/2022) FR Notice (5/2022) (pdf) (312 KB, published May 17, 2022)	Budgets found inadequate through the adequacy review process.
		maintenance plan	Adequate (6/27/2007) Letter (6/2007) (pdf) (235.71 KB) June 1, 2007 FR Notice (6/2007) (pdf) (142 KB, published June 12, 2007)	Budgets found adequate through the adequacy review process; reversed by FR notice above (effective 6/16/2022).
		attainment demonstration	Inadequate (11/16/1999) Letter (11/1999) (pdf) (58.75 KB) July 12, 1999 FR Notice (11/1999) (pdf) (128 KB, published November 1, 1999)

California
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Bakersfield Metropolitan Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
Chico Urbanized Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
Coso Junction	pm10	Maintenance plan and insignificance finding	Adequate (8/13/2024) FR Notice (7/2023) (pdf) (244 KB, published July 13, 2023)	Found adequate through the SIP approval process.
Coso Junction	pm10	maintenance plan	Adequate (9/3/2010) FR Notice	Budgets found adequate through SIP approval process.
East Kern County	8-hour ozone	early progress plan	Adequate (12/10/2008) FR Notice (11/2008) (143 KB, published November 25, 2008)	Budgets found adequate through adequacy review process.
Fresno Urbanized Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, pubilshed November 30, 2005)	Budgets found adequate through SIP approval process.
Imperial County	2006 pm2.5	attainment plan		Plan withdrawn (7/11/2017) Withdrawn Letter (7/2017) (pdf) (78.3 KB, ) July 11, 2017
Imperial County	8-hour ozone	early progress plan	Adequate (5/20/2008) Letter (4/2008) (pdf) (63.55 KB) April 16, 2008 Enclosure (3/2008) (pdf) (118.33 KB) Adopted February 28, 2008, Submitted March 24, 2008 FR Notice (5/2008) (pdf) (139 KB, published May 5, 2008)	Budgets found adequate through the adequacy review process.
Indian Wells	pm10	maintenance plan	Adequate (5/7/2003) FR Notice (5/2003) (pdf) (136 KB, published May 7, 2003)	Budgets found adequate by virtue of SIP approval.
Indian Wells	pm10	2nd maintenance plan	Adequate (2/17/2023) FR Notice (1/2023) (pdf) (270 KB, January 18, 2023)	Budgets found adequate through the SIP approval process
Lake Tahoe North Shore Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
Lake Tahoe South Shore Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
Los Angeles (Coachella)	pm10	attainment demonstration	Adequate (4/9/2004) Letter (3/2004) (pdf) (16.96 KB) March 11, 2004 FR Notice (3/2004) (pdf) (147 KB, published March 25, 2004)	Budgets found adequate through the adequacy review process.
			Adequate (4/18/2003) Letter (4/2003) (pdf) (24.74 KB) April 15, 2003 FR Notice (4/2003) (pdf) (125 KB, published April 18, 2003)	Budgets found adequate through SIP approval process.
			Inadequate (1/4/2000) Letter (11/1999) (pdf) (150.81 KB) November 23, 1999 FR Notice (12/1999) (pdf) (210 KB, published December 20, 1999)
Los Angeles - San Bernadino Counties (Western Mohave Desert)	8-hour ozone	early progress plan	Adequate (5/20/2008) Letter (4/2008) (pdf) (66.98 KB) April 16, 2008 Adequate Letter Enclosure (4/2008) (pdf) (119.9 KB, April 16, 2008) Adopted February 28, 2008, Submitted March 24,, 2008 FR Notice (5/2008) (pdf) (144 KB, published May 5, 2008)	Budgets found adequate through the adequacy review process.
Mammoth Lakes	pm10	maintenance plan	Adequate (10/5/2015) FR Notice (10/2015) (pdf) (242 KB, published October 5, 2015)	Budgets found adequate through SIP approval process.
Modesto Urbanized Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
Portola	2012 PM2.5	attainment plan	Adequate (3/25/2019) FR Notice (3/2019) (pdf) (250 KB, published March 25, 2019)	2012 PM2.5 budgets originally posted for adequacy on May 8, 2017. Adequacy restarted on January 5, 2018 to include 2021 as well as 2019 and 2022 budgets. Budgets approved for 2019 and 2021 through the SIP approval process.
Riverside County (Coachella Valley)	8-hour ozone	early progress plan	Adequate (5/22/2008) Letter (Coachella Valley) (4/2008) (pdf) (61.14 KB) April 16, 2008 Enclosure (Coachella Valley) (4/2008) (pdf) (116.49 KB) Adopted February 28, 2008, Submitted March 24, 2008 FR Notice (5/2008) (pdf) (141 KB, published May 7, 2008)	Budgets found adequate through the adequacy review process.
Riverside County (Coachella Valley)	2008 8-hour ozone	reasonable further progress	Adequate (4/12/2022) FR Notice (3/2023) (pdf) (198 KB, published March 28, 2023)	Budgets found adequate through the adequacy review process.
Sacramento Metro Area	pm10	maintenance plan	Adequate (12/8/2011) Letter (11/2011) (pdf) (167.74 KB) November 3, 2011 FR Notice (11/2011) (pdf) (140 KB, published November 23, 2011)	Budgets found adequate through the adequacy review process.
	2008 8-hr ozone	attainment demonstration and reasonable further progress	Adequate (10/22/2021) FR Notice (10/2021) (pdf) (379 KB, published October 22, 2021)	Budgets found adequate through the SIP approval process.
	1997 8-hr ozone	attainment demonstration and reasonable further progress	Adequate / Inadequate (1/29/2015) FR Notice (8/2014) (pdf) (185 KB, published August 8, 2014)	Budgets found adequate through the SIP approval process.
		attainment demonstration and reasonable further progress	Adequate / Inadequate (8/12/2009) Letter (7/2009) (pdf) (420.38 KB) July 16, 2009 FR Notice (10/2014) (pdf) (361 KB, published October 15, 2014)	Budgets found adequate / inadequate through the adequacy review process.
		reasonable further progress	Adequate (3/29/2006) Adequate Letter (2/2006) (pdf) (405.46 KB) February 24, 2006 FR Notice (3/2006) (pdf) (140 KB, published March 14, 2006)	Budgets found adequate through the adequacy review process.
Sacramento Urbanized Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
San Bernardino County	pm10	attainment demonstration	Inadequate (1/4/2000) Letter (Mojave Desert) (11/1999) (pdf) (188.27 KB) November 23, 1999 > FR Notice (12/1999) (pdf) (210 KB, published December 20, 1999)
San Diego Area	2015 8-hour ozone	Attainment plan	Adequate (10/19/2021) San Diego 2008 and 2015 Letter (pdf) (287.01 KB, October 2021) FR Notice (10/2021) (pdf) (195 KB, published October 4, 2021)	budgets found adequate through the adequacy review process.
	2008 8-hour ozone	Attainment plan	Adequate (10/19/2021) San Diego 2008 and 2015 Letter (pdf) (287.01 KB, October 2021) FR Notice (10/2021) (pdf) (195 KB, published October 4, 2021)	budgets found adequate through the adequacy review process.
	2008 8-hour ozone	reasonable further progress plan	Adequate (12/4/2017) Letter (San Diego) (10/2017) (pdf) (694.01 KB) October 19, 2017 FR Notice (11/2017) (pdf) (197 KB, published November 17, 2017)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	maintenance plan	Adequate (4/4/2013) Letter (3/2013) (pdf) (2.8 MB) March 11, 2013 FR Notice (3/2013) (pdf) (171 KB, published March 20, 2013)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	attainment plan	Adequate (6/9/2008) Letter (5/2008) (pdf) (164.63 KB) May 13, 2008 FR Notice (5/2008) (pdf) (143 KB, published May 23, 2008)	Budgets found adequate through the adequacy review process.
	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
San Francisco Bay Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
San Joaquin Valley	2008 8-hour ozone	Attainment demonstration	Adequate (7/14/2017) FR Notice (16/2017) (pdf) (179 KB, published June 29, 2017) Letter (San Joaquin Valley) (6/2017) (pdf) (262.05 KB) June 13, 2017	Budgets found adequate through the adequacy process
	1997 8-hour ozone	attainment demonstration	Adequate (3/01/2012) FR Notice (3/2012) (pdf) (240 KB, published March 1, 2012)	Budgets found adequate through SIP approval process.
	1997 8-hour ozone	attainment demonstration and reasonable further progress plan	Adequate (2/6/2009) Letter (San Joaquin Valley) (1/2009) (pdf) (1.02 MB) January 8, 2009 FR Notice (1/2009) (pdf) (148 KB, published January 22, 2009)	Budgets found adequate through the adequacy review process.
	2012 annual pm2.5	Attainment Plan (Serious area)	Plan Withdrawn (10/27/2022) CARB requesting letter (pdf) (835.09 KB, October 27, 2022)
	2012 annual pm2.5	Attainment plan (moderate area)	Adequate (11/26/2021) FR Notice (11/2021) (pdf) (297 KB, published November 26, 2021)	Budgets found adequate through the SIP approval process.
	2006 pm2.5	attainment plan	Adequate (7/22/2020) Final Rule (7/2020) (pdf) (314 KB, published July 22, 2020)	Budgets found adequate through the SIP approval process.
	2006 pm2.5	attainment plan	Adequate (5/2/2016) Letter (4/2016) (pdf) (853.68 KB) April 1, 2016 FR Notice (4/2016) (pdf) (240 KB, published April 15, 2016)	Budgets found adequate through the adequacy review process.
	1997 annual pm2.5	attainment plan revision	Adequate (2/10/2022) Letter (pdf) (311.42 KB) FR Notice (2/2022) (pdf) (207 KB, published February 10, 2022)	Budgets found adequate through the adequacy review process.
	1997 24-hour pm2.5	attainment plan	Adequate (1/28/2022) FR Notice (1/2022) (pdf) (269 KB, published January 28, 2022)	Budgets found adequate through the SIP approval process.
	1997 pm2.5	attainment plan	no adequacy action	The 2018 Plan supersedes this past submittal. See letter from CARB to EPA. Letter (5/2019) (pdf) (1.08 MB) May 9, 2019
		attainment plan	Adequate (11/9/2011) FR Notice (11/2011) (pdf) (307 KB, published November 9, 2011)	Regional insignificance finding for re-entrained road dust made through the SIP approval process.
		reasonable further progress and attainment plan	Adequate / Inadequate (5/27/2010) Letter (4/2010) (pdf) (242.14 KB) April 23, 2010 FR Notice (5/2010) (pdf) (144 KB, published May 12, 2010)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
	pm10	maintenance plan	Adequate (11/12/2008) FR Notice (11/2008) (pdf) (214 KB, published November 12, 2008)	Budgets found adequate through SIP approval process.
		attainment demonstration	Adequate (5/26/2004) FR Notice (5/2004) (pdf) (261 KB, published May 26, 2004)	Budgets found adequate through SIP approval process.
		attainment demonstration	Inadequate (5/5/1999)	Determination made under old process.
Searles Valley	pm10	attainment demonstration	Inadequate (1/4/2000) Inadequate Letter (11/1999) (pdf) (155.38 KB) November 23, 1999 FR Notice (12/1999) (pdf) (210 KB, published December 20, 1999)
South Coast	2006 24-hour pm2.5 (serious area)	attainment plan	Adequate (10/12/2021) Letter (pdf) (269.89 KB) FR Notice (10/2021) (pdf) (200 KB, published October 13, 2021)	Budgets found adequate through the adequacy review process.
	2006 pm2.5	attainment plan	Adequate (1/22/2018) Letter (California South-Coast) (12/2017) (pdf) (163.06 KB) December 19, 2017 FR Notice (1/2018) (pdf) (210 KB, published January 5, 2018)	Budgets found adequate through the adequacy review process.
	2006 pm2.5	impracticability demonstration	Adequate (4/14/2016) FR Notice (4/2016) (pdf) (260 KB, published April 14, 2016)	Budgets not acted on due to demonstration of impracticability.
	8-hour ozone	attainment demonstration	Adequate (3/1/2012) FR Notice (3/2012) (pdf) (246 KB, published March 1, 2012)	Budgets found adequate through SIP approval process.
	pm2.5	attainment plan	Adequate (11/9/2011) FR Notice (11/2011) (pdf) (281 KB, published November 9, 2011)	Budgets found adequate through SIP approval process.
	8-hour ozone and pm2.5	reasonable further progress, attainment plan, and out-year budgets	Adequate / Inadequate (5/30/2008) Letter (South Coast) (5/2008) (pdf) (58.21 KB) May 6, 2008 Letter (South Coast) (5/2008) (pdf) (71.17 KB) May 8, 2008 FR Notice (5/2008) (pdf) (154 KB, published May 15, 2008)	Budgets found adequate / inadequate through the adequacy review process. The May 15, 2008 adequacy FR notice incorrectly stated that the 2017 NOx budget for the 8-hour ozone standard was 32 tpd. The adequate 2017 NOx budget for ozone is actually 232 tpd. This typographical error was corrected in a June 18, 2008 FR Notice Corrections (6/2008) (pdf) (120 KB, published June 18, 2008)
	nitrogen dioxide	maintenance plan	Adequate (1/4/2010) Letter (11/2009) (pdf) (199.81 KB) November 20, 2009 FR Notice (12/2009) (pdf) (136 KB, published December 17, 2009)	Budgets found adequate through the adequacy review process.
	nitrogen dioxide	maintenance plan	Adequate (4/9/2004) Letter (3/2004) (pdf) (50.22 KB) March 11, 2004 FR Notice (3/2004) (pdf) (147 KB, published March 25, 2004)	Budgets found adequate through the adequacy review process.
	pm10	attainment demonstration	Adequate (4/18/2003) Letter (4/2003) (pdf) (23.48 KB) April 15, 2003 FR Notice (4/2003) (pdf) (129 KB, published April 18, 2003)	Budgets found adequate through SIP approval process. Budgets replace those posted on 06/24/99.
Stockton Urbanized Area	carbon monoxide	maintenance plan	Adequate (1/30/2006) FR Notice (11/2005) (pdf) (201 KB, published November 30, 2005)	Budgets found adequate through SIP approval process.
Ventura	8-hour ozone	early progress plan	Adequate (5/20/2008) Letter (4/2008) (pdf) (56.75 KB) April 16, 2008 Enclosure (5/2008) (pdf) (115.65 KB, ) Adopted February 28, 2008, Submitted March 24, 2008 FR Notice (5/2008) (pdf) (146 KB, published May 5, 2008)	Budgets found adequate through the adequacy review process.
Nevada County, Western part, CA	2008 8-hour ozone	attainment plan	Adequate (5/21/2021) Final FR (5/2021) (pdf) (330 KB, published May 21, 2021)	Budgets found adequate through the SIP approval process.
Yuba City-Marysville	pm2.5	maintenance plan	Adequate (9/9/2014) FR Notice (8/2014) (pdf) (212 KB, published August 25, 2014)	Budgets found adequate through the adequacy review process

Nevada
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Clark County (Las Vegas)	8-hour ozone	maintenance plan	Adequate (2/7/2013) FR Notice (1/2013) (pdf) (244 KB, published January 8, 2013)	Budgets found adequate through SIP approval process.
	8-hour ozone	early progress plan	Adequate (5/29/2009) FR Notice (5/2009) (pdf) (140 KB, published May 14, 2009)	Budgets found adequate through the adequacy review process.
	carbon monoxide	maintenance plan	Adequate (9/27/2010) FR Notice (9/2010) (pdf) (160 KB, published September 27, 2010)	Budgets found adequate through the SIP approval process.
		attainment demonstration	Adequate (12/15/2000) Letter (11/2000) (pdf) (504.26 KB) November 20, 2000 FR Notice (11/2000) (pdf) (215 KB, published November 30, 2000)	Budgets found adequate through the adequacy review process.
			Inadequate (2/17/2000) Letter (1/2000) (pdf) (23.94 KB) January 12, 2000 FR Notice (2/2000) (pdf) (215 KB, published February 2, 2000)
			Inadequate (5/5/1999)	Determination made under old process
	pm10	maintenance plan	Adequate (10/16/2014) FR Notice (10/2014) (pdf) (258 KB, published October 6, 2014)	Budgets found adequate through the SIP approval process
		attainment demonstration	Adequate (1/26/2002) Letter (112001) (pdf) (96.69 KB) November 9, 2001 Response to Comments (2001) (pdf) (582.88 KB) 2001 Enclosures (2001) (pdf) (132.38 KB) 2001 FR Notice (1/2002) (pdf) (128 KB, published January 11, 2002)	Budgets found adequate through the adequacy review process
		attainment demonstration	Inadequate (11/16/1999) Letter (7/1999) (pdf) (54.94 KB) July 12, 1999 FR Notice (11/1999) (pdf) (106 KB, published November 1, 1999)
Lake Tahoe	carbon monoxide	limited maintenance plan	Adequate (2/13/2004) FR Direct Final Rule (12/2003) (pdf) (160 KB, published December 15, 2003)	Budgets found adequate through SIP approval process.
Reno (Truckee Meadows, Washoe County)	pm10	maintenance plan	Adequate (12/8/2015) FR Notice (12/2015) (pdf) (258 KB, published December 8, 2015)	Budgets found adequate through SIP approval process.
	pm10	maintenance plan	Adequate (6/2/2010) Letter (5/2010) (pdf) (200.43 KB) May 5, 2010 FR Notice (5/2010) (pdf) (143 KB, published May 18, 2010)	Budgets found adequate through the adequacy review process.
	carbon monoxide	second maintenance plan	Adequate (10/31/2016) FR Notice (8/2016) (pdf) (278 KB, published August 30, 2016)	Budgets found adequate through the SIP approval process
	carbon monoxide	maintenance plan	Adequate (3/30/2006) Letter (2/2006) (pdf) (339.45 KB) February 14, 2006 FR Notice (3/2006) (pdf) (145 KB, published March 15, 2006)	Budgets found adequate through the adequacy review process.

Conformity Adequacy Review: Region 9

State and Local Transportation