Conformity Adequacy Review: Region 5

State Implementation Plans (SIP) Submissions that EPA has Found Adequate or Inadequate
Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin

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

Contacts: Anthony Maietta (IL, IN, OH) at 312-353-8777, fax: 312-886-5824 or maietta.anthony@epa.gov. or
Mike Leslie (MI, MN, WI), at 312-353-6680 or leslie.michael@epa.gov.
U.S. EPA Region 5, Air and Radiation Division, 77 West Jackson Blvd., AR-18J, Chicago, IL 60604-3590

Illinois
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Chicago Area	pm2.5	maintenance plan	Adequate (10/2/2013) FR Notice (pdf) (270 KB, published August 13, 2012)	Budgets found adequate through the SIP approval process.
	8-hour ozone	attainment demonstration	Plan Withdrawn (1/24/2023) Letter (pdf) (40.35 KB, January 24, 2023)
		maintenance plan	Adequate (5/20/2022) FR Notice (pdf) (427 KB, March 10, 2022)	Budgets found adequate through the adequacy review process
			Adequate (8/13/2012) FR Notice (pdf) (270 KB, published August 13, 2012)	Budgets found adequate through the SIP approval process.
			Adequate (5/26/2010) Adequate Letter (5/26/2010) (pdf) (88.56 KB) and FR Notice (pdf) (144 KB, May 11, 2010)	Budgets found adequate through the adequacy review process.
Metro-East St. Louis	2008 8-hour ozone	maintenance plan	Adequate 3-1-2018 FR Notice (pdf) (237 KB, published March 1, 2018)	Budgets found adequate through the SIP approval process.
	1997 8-hour ozone	maintenance plan	Adequate (6/12/2012) FR Notice (pdf) (281 KB, published June 12, 2012)	Budgets found adequate through the SIP approval process.
		attainment demonstration	Adequate (2/20/2008) FR Notice (pdf) (146 KB, published February 5, 2008)	Budgets found adequate through the adequacy review process.
		attainment demonstration and maintenance plan	Withdrawn	Budgets prepared with Mobile 6.2. Adequacy review started August 5, 2010.
		attainment demonstration	Adequate (2/20/2008) FR Notice (pdf) (146 KB, published February 5, 2008 )	Budgets found adequate through the adequacy review process.
Indiana
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Indianapolis Area (Hamilton, Hendricks, Johnson, Madison, Marion, and Morgan Counties)	pm2.5	maintenance plan	Adequate (7/11/2013) FR Notice (pdf) (268 KB, published July 11, 2013)	Budgets found adequate through SIP approval process.
	pm2.5	attainment demonstration	Adequate (5/21/2010) Adequate Letter (5/21/2010) (pdf) (62.33 KB, April 12, 2004) and FR Notice (pdf) (144 KB, published May 6, 2010)	Budgets found adequate through the adequacy review process.
	8-hour ozone	maintenance plan	Adequate (10/19/2007) FR Notice (pdf) (155 KB, published October 19, 2007)	Budgets found adequate through SIP approval process.
Cincinnati-Hamilton OH-KY-IN Area (IN portion) Dearborn County Delaware County	2008 8-hour ozone	maintenance plan	Adequate (10/12/2016) Ohio-Indiana Cincinnati-Hamilton Adequate Letter (8/23/2016) (pdf) (26.06 KB, August 26, 2016) and FR Notice (pdf) (191 KB, published September 27, 2016)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	maintenance plan	Adequate (3/11/2010) Adequate Letter (3/11/2010) (pdf) (78.65 KB, January 14, 2010) and FR Notice (pdf) (142 KB, published February 24, 2010)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	attainment demonstration	Adequate (5/8/2008) Adequate Letter (5/8/2008) (pdf) (90.88 KB, May 6, 2008) and FR Notice and Correction FR Notice (pdf) (140 KB)	Budgets found adequate through the adequacy review process.
	1997 pm2.5	maintenance plan	Adequate (12/23/2011) FR Notice	Budgets found adequate through SIP approval process.
	1997 pm2.5	attainment demonstration		2008 attainment demonstration was replaced by 2011 redesignation and maintenance plan.
Delaware County	8-hour ozone	maintenance plan	Adequate (1/3/2006) FR Notice (pdf) (199 KB)	Budgets found adequate through SIP approval process.
East Chicago (Lake County) and Indianapolis (Marion County)	carbon monoxide	limited maintenance plan	Adequate (3/20/2000) FR Notice (pdf) (214 KB) and FR Notice (pdf) (233 KB)	Budget adequate by virtue of SIP.
Evansville (Dubois, Vanderburgh, and Warrick Counties; Montgomery Township in Gibson County; Ohio Township in Spencer County; and Washington Township in Pike Count	8-hour ozone	maintenance plan	Adequate (7/15/2005) Adequate Letter (7/15/2005) (pdf) (34.05 KB, January 7, 2005) and FR Notice (pdf) (144 KB)	Budgets found adequate through the adequacy review process.
	1997 pm2.5	maintenance plan	Adequate (9/27/2011) FR Notice (pdf) (173 KB)	Budgets found adequate through SIP approval process.
Greene County	8-hour ozone	maintenance plan	Adequate (11/4/2005) Adequate Letter (11/4/2005) (pdf) (35.56 KB, September 29, 2005) and FR Notice (pdf) (144 KB)	Budgets found adequate through the adequacy review process.
Jackson County	8-hour ozone	maintenance plan	Adequate (11/4/2005) Adequate Letter (11/4/2005) (pdf) (35.56 KB, September 29, 2005) and FR Notice (pdf) (138 KB)	Budgets found adequate through the adequacy review process.
Louisville, KY -IN Area (Clark, Jefferson, and Floyd Counties)	1997 pm2.5	maintenance plan	Adequate (9/9/2016) 81 FR 62390 (Printed 9/27/2016)	Budgets found adequate through the SIP approval process
	8-hour ozone	maintenance plan	Adequate (7/19/2007) FR Notice (pdf) (149 KB)	Budgets found adequate through the SIP approval process.
Northwest Indiana (Lake and Porter Counties)	2008 8-hour ozone	15% ROP	Adequate (6/14/2018) Indiana Department of Environmental Management letter (pdf) (55.46 KB, March 8, 2018) and FR Notice (pdf) (212 KB)	Budgets found adequate through the adequacy process.
Northwest Indiana (Lake and Porter Counties)	8-hour ozone	maintenance plan	Adequate (5/11/2010) FR Notice	Budgets found adequate through the SIP approval process.
Vigo County	8-hour ozone	maintenance plan	Adequate (12/7/2005) Adequate Letter (12/7/2005) (pdf) (22.91 KB, October 25, 2005) and FR Notice (pdf) (138 KB)	Budgets found adequate through the adequacy review process.
Michigan
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Allegan County	2008 8-hour ozone	reasonable further progress	Adequate (4/15/2024) Letter (pdf) (222.85 KB, January 17, 2024) and FR Notice (pdf) (241 KB, published March 29, 2024)	Budgets found adequate through the adequacy review process
Allegan County	8-hour ozone	maintenance plan	Adequate (9/24/2010) FR Notice (pdf) (159 KB)	Budgets found adequate through SIP approval process.
Benzie County	8-hour ozone	maintenance plan	Adequate (5/16/2007) Adequate Letter (5/16/2007) (pdf) (20.96 KB, August 15, 2006) and FR Notice (pdf) (199 KB)	Budgets found adequate through SIP approval process.
Berrien County	2008 8-hour ozone	reasonable further progress	Adequate (4/15/2024) Letter (pdf) (222.85 KB, January 17, 2024) and FR Notice (pdf) (241 KB, published March 29, 2024)	Budgets found adequate through the adequacy review process
Berrien County	8-hour ozone	maintenance plan	Adequate (2/7/2007) Adequate Letter (2/7/2007) (pdf) (59.48 KB, November 29, 2006 ) and FR Notice (pdf) (140 KB)	Budgets found adequate through the adequacy review process.
Cass County	8-hour ozone	maintenance plan	Adequate (2/7/2007) Adequate Letter (2/7/2007) (pdf) (59.48 KB, November 29, 2006 ) and FR Notice (pdf) (140 KB)	Budgets found adequate through the adequacy review process.
Detroit	carbon monoxide	maintenance plan	Adequate (8/30/1998) FR Notice (pdf) (195 KB)	Budget adequate by virtue of SIP approval
Flint	8-hour ozone	maintenance plan	Adequate (2/7/2007) < Adequate Letter (2/7/2007) (pdf) (59.48 KB, November 29, 2006 ) and FR Notice (pdf) (140 KB)	Budget adequate through SIP approval process.
Grand Rapids (Kent and Ottawa Counties)	8-hour ozone	maintenance plan	Adequate (5/16/2007) Adequate Letter (5/16/2007) (pdf) (20.96 KB, August 15, 2006) and FR Notice	Budgets found adequate through SIP approval process.
Huron County	8-hour ozone	maintenance plan	Adequate (5/16/2007) Adequate Letter (5/16/2007) (pdf) (20.96 KB, August 15, 2006) and FR Notice	Budgets found adequate through SIP approval process.
Kalamazoo (Kalamazoo, Calhoun, and Van Buren Counties)	8-hour ozone	maintenance plan	Adequate (5/16/2007) Adequate Letter (5/16/2007) (pdf) (20.96 KB, August 15, 2006) and FR Notice (pdf) (199 KB)	Budgets found adequate through SIP approval process.
Lansing (Ingham, Eaton, and Clinton Counties)	8-hour ozone	maintenance plan	Adequate (5/16/2007) Adequate Letter (5/16/2007) (pdf) (20.96 KB, August 15, 2006) and	Budgets found adequate through SIP approval process.
Mason County	8-hour ozone	maintenance plan	Adequate (5/16/2007) Adequate Letter (5/16/2007) (pdf) (20.96 KB, August 15, 2006) and FR Notice (pdf) (199 KB)	Budgets found adequate through SIP approval process.
Muskegon County	2008 8-hour ozone	reasonable further progress	Adequate (4/15/2024) Letter (pdf) (222.85 KB, January 17, 2024) and FR Notice (pdf) (241 KB, published March 29, 2024)	Budgets found adequate through the adequacy review process
Muskegon County	8-hour ozone	maintenance plan	Adequate 2/7/2007) Adequate Letter (2/7/2007) (pdf) (59.48 KB, November 29, 2006 ) and FR Notice (pdf) (140 KB)	Budgets found adequate through the adequacy review process.
Southeast (Detroit, Ann Arbor)	8-hour ozone	maintenance plan	Adequate (6/27/2009) FR Notice (pdf) (149 KB, published June 29, 2009)	Budgets found adequate through SIP approval process.
Ohio
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Canton - Massilon	pm2.5	attainment demonstration	Adequate (2/10/2010) Adequate Letter (2/10/2010) (pdf) (73.33 KB, December 7, 2009) and FR Notice	Budgets found adequate through the adequacy review process.
Canton - Massilon	8-hour ozone	maintenance plan	Adequate (4/18/2007) Adequate Letter (4/18/2007) (pdf) (68.23 KB, January 22, 2007) and FR Notice (pdf) (149 KB)	Budgets found adequate through the adequacy review process.
Cincinnati-Hamilton OH-KY-IN Area (OH portion)	pm2.5	maintenance plan	Adequate (12/23/2011) FR Notice	Budgets found adequate through SIP approval process.
	pm2.5	attainment demonstration		2008 attainment demonstration was replaced by 2011 redesignation and maintenance plan.
	2008 8-hour ozone	maintenance plan	Adequate (10/12/2016) Ohio-Indiana Cincinnati-Hamilton Adequate Letter (8/23/2016) (pdf) (26.06 KB, August 26, 2016) and FR Notice (Printed 9/27/2016)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	maintenance plan	Adequate (3/11/2010) Adequate Letter (3/11/2010) (pdf) (81.14 KB, January 14, 2010) and FR Notice	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	attainment demonstration	Adequate (6/27/2008) Adequate Letter (5/8/2008) (pdf) (90.88 KB, May 6, 2008) and FR Notice (148 KB, published June 12, 2008)	Budgets found adequate through the adequacy review process.
Cleveland - Akron	pm2.5	maintenance plan	Adequate (9/18/2013) FR Notice	Budgets found adequate through SIP approval process.
Cleveland - Akron	pm2.5	attainment demonstration	Adequate (2/10/2010) Adequate Letter (2/10/2010) (pdf) (76.32 KB, December 7, 2009) and FR Notice	Budgets found adequate through the adequacy review process.
Cleveland - Akron - Lorain Area (Ashtabula, Cuyahoga, Geauga Lake, Lorain, Medina, Portage, and Summit Counties)	2008 8-hour ozone	maintenance plan	Adequate (10/12/2016) Ohio Cleveland Adequate Letter (8/23/2016) (pdf) (24.87 KB, August 23, 2016) and FR Notice (printed 9/27/2016)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	maintenance plan	Adequate (6/04/2009) Adequate Letter (6/4/2009) (pdf) (61.6 KB, March 30, 2009) and FR Notice (pdf) (139 KB, published May 20, 2009)	Budgets found adequate through the adequacy review process.
Columbus Area (Delaware, Fairfield, Franklin, Knox, Licking, and Madison Counties)	2015 8-hour ozone	maintenance plan	Adequate (8/29/2019) Department of Air Pollution Control letter (pdf) (312.91 KB, June 5, 2019) and FR Notice (pdf) (194 KB, August 14, 2019 /)	Budgets found adequate through the adequacy process.
	2008 8-hour ozone	maintenance plan	Adequate (10/12/2016) Ohio Columbus Adequate Letter (8/23/2016) (pdf) (24.79 KB, August 23, 2016) and FR Notice (printed 9/27/2016)	Budgets found adequate through the adequacy process.
	1997 pm2.5	maintenance plan	Adequate (11/7/2013) 78 FR 66845 (printed 11/7/2013)	Budgets found adequate through the SIP approval process.
	1997 pm2.5	attainment demonstration	withdrawn	Attainment plan budgets prepared with Mobile 6.2 replaced with maintenance plan budgets prepared using MOVES.
	1997 8-hour ozone	maintenance plan	Adequate (6/4/2009) Adequate Letter (6/4/2009) (pdf) (53.96 KB, March 30, 2009) and FR Notice (pdf) (139 KB, May 20, 2009)	Budgets found adequate through the adequacy review process.
Cuyahoga County	carbon monoxide	limited maintenance plan	Adequate (7/31/2006) FR Notice (pdf) (153 KB, June 1, 2006)	Budgets adequate through SIP approval process.
Dayton - Springfield	pm2.5	maintenance plan	Adequate (9/26/2013) FR Notice	Budgets adequate through SIP approval process.
	pm2.5	attainment demonstration	withdrawn	Attainment plan budgets prepared with Mobile 6.2 replaced with maintenance plan budgets prepared using MOVES.
	8-hour ozone	maintenance plan	Adequate (4/18/2007) Adequate Letter (4/18/2007) (pdf) (58.32 KB, February 9, 2007) and FR Notice (pdf) (153 KB, June 1, 2006)	Budgets found adequate through the adequacy review process.
Huntington Ashland	pm2.5	maintenance plan	Adequate (10/14/2011) Adequate Letter (10/14/2011) (pdf) (973.53 KB, August 11, 2011) and FR Notice	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Huntington Ashland	pm2.5	attainment demonstration	Adequate (12/22/2009) FR Notice (pdf) (134 KB, published December 7, 2009)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Lima	8-hour ozone	maintenance plan	Adequate (4/18/2007) Adequate Letter (4/18/2007) (pdf) (58.32 KB, February 9, 2007) and FR Notice	Budgets found adequate through the adequacy review process.
Parkersburg - Marietta	pm2.5	maintenance plan	Adequate (8/29/2013) FR Notice	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Parkersburg - Marietta	8-hour ozone	maintenance plan	Adequate (4/18/2007) Ohio Parkersburg Adequate Letter (4/18/2007) (pdf) (66.13 KB, December 28, 2006) Ohio Parkersburg Adequate Letter and FR Notice	Budgets found adequate through the adequacy review process.
Steubenville - Weirton	pm2.5	attainment demonstration	Adequate (2/10/2010) Adequate Letter (2/10/2010) (pdf) (73.33 KB, December 7, 2009) and FR Notice	Budgets found adequate through the adequacy review process.
Steubenville - Weirton	8-hour ozone	maintenance plan	Adequate (4/18/2007) Adequate Letter (4/18/2007) (pdf) (54.22 KB, January 22, 2007) and FR Notice (pdf) (153 KB)	Budgets found adequate through the adequacy review process.
Toledo (Lucas and Wood Counties)	8-hour ozone	maintenance plan	Adequate (8/9/2007) FR Notice (pdf) (158 KB)	Budgets found adequate through SIP approval process.
Washington County	pm2.5	attainment demonstration	Adequate (12/22/2009) FR Notice (pdf) (136 KB, published December 7, 2009)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Wheeling (Belmont County)	pm2.5	maintenance plan	Adequate (8/29/2013) FR Notice	Regional insignificance finding for PM2.5 and NOx made through the SIP approval process.
Wheeling (Belmont County)	8-hour ozone	maintenance plan	Adequate (4/18/2007) Adequate Letter (4/18/2007) (pdf) (68.23 KB, January 22, 2007) and FR Notice (pdf) (153 KB)	Budgets found adequate through the adequacy review process.
Youngstown (Columbiana and Trumbull Counties)	8-hour ozone	maintenance plan	Adequate (6/12/2007) FR Notice (pdf) (160 KB)	Budgets found adequate through SIP approval process.
Wisconsin
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Door County	8-hour ozone	maintenance plan	Adequate(5/21/2010) Adequate Letter (5/21/2010) (pdf) (98.77 KB) and FR Notice	Budgets found adequate through the adequacy review process.
Wisconsin Portion of Chicago-Naperville, IL-IN-WI (Kenosha, Wisconsin)	2008 8-hour ozone	maintenance plan	Adequate (4/11/2022) FR Notice	Budgets found adequate through the adequacy review process.
		attainment plan	Adequate (11/15/2017) EPA determination letter of 2008 8-hour ozone Kenosha (pdf) (284.38 KB, September 6, 2017) 82 FR 50418 printed 10/31/2017	budgets found adequate through the adequacy process.
		early progress plan	Adequate (4/16/2015) Adequate Letter (4/16/2015) (pdf) (45.66 KB, March 13, 2015) and FR Notice	Budgets found adequate through the adequacy review process.
Kewaunee County	8-hour ozone	maintenance plan	Adequate (12/19/2007) FR Notice (pdf) (145 KB)	Budgets found adequate through the adequacy review process.
Manitowoc	2015 8-hour ozone	maintenance plan	Adequate (3/31/2022) FR Notice	Budgets found adequate through the adequacy review process.
Manitowoc	2008 8-hour ozone	maintenance plan	Adequate (5/21/2010) Adequate Letter (5/21/2010) (pdf) (98.77 KB) and FR Notice	Budgets found adequate through the adequacy review process.
Milwaukee	8-hour ozone	maintenance plan	Adequate (7/31/2012) FR Notice	Budgets found adequate through the SIP approval process.
Milwaukee	8-hour ozone	maintenance plan	Adequate (5/21/2010) Adequate Letter (5/21/2010) (pdf) (98.77 KB) and FR Notice	Budgets found adequate through the adequacy review process.
Sheboygan	2008 8-hour ozone	Attainment plan/	Adequate (4/20/2018) EPA determination letter of 2008 8-hour ozone Sheboygan (pdf) (197.83 KB, January 17, 2019) 83 FR 14637 (printed 4/1/2015)	budgets found adequate through the adequacy process.
	1997 8-hour ozone	maintenance plan	Adequate (4/16/2015) 80 FR 17428 (printed 4/1/2015)	Budgets found adequate through the SIP approval process.
		early progress plan	Adequate (4/16/2015) Adequate Letter (4/16/2015) (pdf) (45.66 KB, March 13, 2015) and FR Notice	Budgets found adequate through the adequacy review process.
		maintenance plan	Adequate (5/21/2010) Adequate Letter (5/21/2010) (pdf) (98.77 KB) and FR Notice	Budgets found adequate through the adequacy review process.

Conformity Adequacy Review: Region 5

State and Local Transportation