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  2. State and Local Transportation

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8-hour ozone attainment demonstration Plan Withdrawn (1/24/2023) Letter (pdf) (40.35 KB, January 24, 2023)  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attainment demonstration and maintenance plan Withdrawn Budgets prepared with Mobile 6.2.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.

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.
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.
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.

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
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
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
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.
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.
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.
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.
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.
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.
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.
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.
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.
 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.
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.
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.
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.

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