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  1. Home
  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

On this page:
  • Illinois
  • Indiana
  • Michigan
  • Ohio
  • Wisconsin

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

Contacts: For the Region 5 contact person (name, phone number, email address), see EPA’s Regional Contacts for State and Local Transportation.

GP

Illinois
AreaPollutantSIP SubmissionFinding
(date budgets apply)
Additional Information/ Comments
Chicago Areapm2.5maintenance planAdequate (10/2/2013)
FR Notice (8/2012) (pdf) (270 KB, published August 13, 2012)
Budgets found adequate through the SIP approval process.
8-hour ozoneattainment demonstration Plan Withdrawn (1/2023) Letter (pdf) (40.35 KB, January 24, 2023)  
maintenance planAdequate (5/20/2022)
FR Notice (3/2022) (pdf) (427 KB, March 10, 2022)
Budgets found adequate through the adequacy review process
Adequate (8/13/2012)
FR Notice (8/2012) (pdf) (270 KB, published August 13, 2012)
Budgets found adequate through the SIP approval process.
Adequate (5/26/2010)
Letter (4/2010) (pdf) (88.56 KB)
April 22, 2010
and
FR Notice (5/2010) (pdf) (144 KB, May 11, 2010)
Budgets found adequate through the adequacy review process.
Metro-East St. Louis2008 8-hour ozonemaintenance planAdequate 3-1-2018
FR Notice (3/2018) (pdf) (237 KB, published March 1, 2018)
Budgets found adequate through the SIP approval process.
1997 8-hour ozonemaintenance planAdequate (6/12/2012)
FR Notice (6/2012) (pdf) (281 KB, published June 12, 2012)
Budgets found adequate through the SIP approval process.
attainment demonstrationAdequate (2/20/2008)
FR Notice (2/2008) (pdf) (146 KB, published February 5, 2008)
Budgets found adequate through the adequacy review process.
attainment demonstration and maintenance planWithdrawnBudgets prepared with Mobile 6.2. Adequacy review started August 5, 2010.
attainment demonstrationAdequate (2/20/2008)
FR Notice (2/2008) (pdf) (146 KB, published February 5, 2008 )
Budgets found adequate through the adequacy review process.
Indiana
AreaPollutantSIP SubmissionFinding
(date budgets apply)
Additional Information/ Comments
Indianapolis Area (Hamilton, Hendricks, Johnson, Madison, Marion, and Morgan Counties)pm2.5maintenance planAdequate (7/11/2013)
FR Notice (7/2013) (pdf) (268 KB, published July 11, 2013)
Budgets found adequate through SIP approval process.
attainment demonstrationAdequate (5/21/2010)
Letter (4/2010) (pdf) (62.33 KB)
April 12, 2010
and
FR Notice (5/2010) (pdf) (144 KB, published May 6, 2010)
Budgets found adequate through the adequacy review process.
8-hour ozonemaintenance planAdequate (10/19/2007)
FR Notice (10/2007) (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 ozonemaintenance planAdequate (10/12/2016)
Letter (8/2016) (pdf) (26.06 KB)
August 26, 2016
and
FR Notice (9/2016) (pdf) (191 KB, published September 27, 2016)
Budgets found adequate through the adequacy review process.
1997 8-hour ozonemaintenance planAdequate (3/11/2010)
Letter (1/2010) (pdf) (78.65 KB)
January 14, 2010
and
FR Notice (2/2010) (pdf) (142 KB, published February 24, 2010)
Budgets found adequate through the adequacy review process.
attainment demonstrationAdequate (5/8/2008)
Letter (5/2008) (pdf) (90.88 KB)
May 6, 2008
and
FR Notice (4/2008) (pdf) (144 KB, published April 23, 2008) and
Correction FR Notice (6/2008) (pdf) (140 KB, published June 3, 2008)
Budgets found adequate through the adequacy review process.
1997 pm2.5maintenance planAdequate (12/23/2011)
FR Notice (12/2011) (pdf) (177 KB, published December 23, 2011)
Budgets found adequate through SIP approval process.
attainment demonstration 2008 attainment demonstration was replaced by 2011 redesignation and maintenance plan.
Delaware County8-hour ozonemaintenance planAdequate (1/3/2006)
FR Notice (11/2005) (pdf) (199 KB, published November 16, 2005)
Budgets found adequate through SIP approval process.
East Chicago (Lake County) and Indianapolis (Marion County)carbon monoxidelimited maintenance planAdequate (3/20/2000)
FR Proposed Rule (1/2000) (pdf) (214 KB, published January 19, 2000) and FR Final Rule (1/2000) (pdf) (233 KB, published January 19, 2000)
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 Count8-hour ozonemaintenance planAdequate (7/15/2005)
Letter (6/2005) (pdf) (34.05 KB, )
June 7, 2005
and
FR Notice (6/2005) (pdf) (144 KB, published June 30, 2005)
Budgets found adequate through the adequacy review process.
1997 pm2.5maintenance planAdequate (9/27/2011)
FR Notice (9/2011) (pdf) (173 KB, published September 27, 2011)
Budgets found adequate through SIP approval process.
Greene County8-hour ozonemaintenance planAdequate (11/4/2005)
Letter (9/2005) (pdf) (35.56 KB)
September 29, 2005
and
FR Notice (Greene County)(10/2005) (pdf) (144 KB, published October 20, 2005)
Budgets found adequate through the adequacy review process.
Jackson County8-hour ozonemaintenance planAdequate (11/4/2005)
Letter (9/2005) (pdf) (35.56 KB)
September 29, 2005
and
FR Notice (Jackson County) (10/2005) (pdf) (138 KB, published October 20, 2005)
Budgets found adequate through the adequacy review process.
Louisville, KY -IN Area (Clark, Jefferson, and Floyd Counties)1997 pm2.5maintenance planAdequate (9/9/2016)
FR Notice (9/2016) (pdf) (243 KB, published September 9, 2016)
Budgets found adequate through the SIP approval process
8-hour ozonemaintenance planAdequate (7/19/2007)
FR Notice (7/2007)(pdf) (149 KB, published July 19, 2007)
Budgets found adequate through the SIP approval process.
Northwest Indiana (Lake and Porter Counties)2008 8-hour ozone15% ROPAdequate (6/14/2018)
Letter (3/2018) (pdf) (55.46 KB, March 8, 2018) and
FR Notice (5/2018) (pdf) (212 KB, published May 30, 2018)
Budgets found adequate through the adequacy process.
8-hour ozonemaintenance planAdequate (5/11/2010)
FR Notice (5/2010) (pdf) (167 KB, published May 11, 2010)
Budgets found adequate through the SIP approval process.
Vigo County8-hour ozonemaintenance planAdequate (12/7/2005)
Letter (10/2005) (pdf) (22.91 KB)
October 25, 2005
and
FR Notice (11/2005) (pdf) (138 KB, published November 22, 2005)
Budgets found adequate through the adequacy review process.
Michigan
AreaPollutantSIP SubmissionFinding
(date budgets apply)
Additional Information/ Comments
Allegan County2008 8-hour ozonereasonable further progressAdequate (4/15/2024)
Letter (pdf) (222.85 KB, January 17, 2024) and
FR Notice (3/2024) (pdf) (241 KB, published March 29, 2024)
Budgets found adequate through the adequacy review process
8-hour ozonemaintenance planAdequate (9/24/2010)
FR Notice (9/2010)(pdf) (159 KB, published September 24, 2010)
Budgets found adequate through SIP approval process.
Benzie County8-hour ozonemaintenance planAdequate (5/16/2007)
Letter (8/2006) (pdf) (20.96 KB)
August 15, 2006
and
FR Notice (5/2007) (pdf) (199 KB, published May 16, 2007)
Budgets found adequate through SIP approval process.
Berrien County2008 8-hour ozonereasonable further progressAdequate (4/15/2024)
Letter (pdf) (222.85 KB, January 17, 2024) and
FR Notice (3/2024) (pdf) (241 KB, published March 29, 2024)
Budgets found adequate through the adequacy review process
8-hour ozonemaintenance planAdequate (2/7/2007)
Letter (11/2006) (pdf) (59.48 KB)
November 29, 2006
and
FR Notice (1/2007) (pdf) (140 KB, published January 23, 2007)
Budgets found adequate through the adequacy review process.
Cass County8-hour ozonemaintenance planAdequate (2/7/2007)
Letter (11/2006) (pdf) (59.48 KB)
November 29, 2006
and
FR Notice (1/2007) (pdf) (140 KB, published January 23, 2007)
Budgets found adequate through the adequacy review process.
Detroitcarbon monoxidemaintenance planAdequate (8/30/1998)
FR Notice (6/1999) (pdf) (195 KB, published June 30, 1999)
Budget adequate by virtue of SIP approval
Flint8-hour ozonemaintenance planAdequate (2/7/2007)
< Letter (11/2006) (pdf) (59.48 KB)
November 29, 2006
 and
FR Notice (1/2007) (pdf) (140 KB, published January 23, 2007)
Budget adequate through SIP approval process.
Grand Rapids (Kent and Ottawa Counties)8-hour ozonemaintenance planAdequate (5/16/2007)
Letter (8/2006) (pdf) (20.96 KB)
August 15, 2006
and
FR Notice (5/2007) (pdf) (200 KB, published May 16, 2007)
Budgets found adequate through SIP approval process.
Huron County8-hour ozonemaintenance planAdequate (5/16/2007)
Letter (8/2006) (pdf) (20.96 KB)
August 15, 2006
and
FR Notice (5/2007) (pdf) (200 KB, published May 16, 2007)
Budgets found adequate through SIP approval process.
Kalamazoo (Kalamazoo, Calhoun, and Van Buren Counties)8-hour ozonemaintenance planAdequate (5/16/2007)
Letter (8/2006) (pdf) (20.96 KB)
August 15, 2006
and
FR Notice (5/2007) (pdf) (200 KB, published May 16, 2007)
Budgets found adequate through SIP approval process.
Lansing (Ingham, Eaton, and Clinton Counties)8-hour ozonemaintenance planAdequate (5/16/2007)
Letter (8/2006) (pdf) (20.96 KB)
August 15, 2006
and
Budgets found adequate through SIP approval process.
Mason County8-hour ozonemaintenance planAdequate (5/16/2007)
Letter (8/2006) (pdf) (20.96 KB)
August 15, 2006
and
FR Notice (5/2007) (pdf) (200 KB, published May 16, 2007)
Budgets found adequate through SIP approval process.
Muskegon County2008 8-hour ozonereasonable further progressAdequate (4/15/2024)
Letter (pdf) (222.85 KB, January 17, 2024) and
FR Notice (3/2024) (pdf) (241 KB, published March 29, 2024)
Budgets found adequate through the adequacy review process
8-hour ozonemaintenance planAdequate 2/7/2007)
Letter (11/2006) (pdf) (59.48 KB)
November 29, 2006
and
FR Notice (1/2007) (pdf) (140 KB, published January 23, 2007)
Budgets found adequate through the adequacy review process.
Southeast (Detroit, Ann Arbor)8-hour ozonemaintenance planAdequate (6/27/2009)
FR Notice (6/2009) (pdf) (149 KB, published June 29, 2009)
Budgets found adequate through SIP approval process.
Ohio
AreaPollutantSIP SubmissionFinding
(date budgets apply)
Additional Information/ Comments
Canton - Massilon pm2.5attainment demonstrationAdequate (2/10/2010)
Letter (12/2009) (pdf) (73.33 KB)
December 7, 2009
and
FR Notice (1/2010) (138 KB, published January 26, 2010)
Budgets found adequate through the adequacy review process.
8-hour ozonemaintenance planAdequate (4/18/2007)
Letter (1/2007) (pdf) (68.23 KB)
January 22, 2007
and
FR Notice (4/2007) (pdf) (149 KB, published April 3, 2007)
Budgets found adequate through the adequacy review process.
Cincinnati-Hamilton OH-KY-IN Area (OH portion)pm2.5maintenance planAdequate (12/23/2011)
FR Notice (12/2011) (pdf) (177 KB, published December 23, 2011)
Budgets found adequate through SIP approval process.
attainment demonstration 2008 attainment demonstration was replaced by 2011 redesignation and maintenance plan.
2008 8-hour ozonemaintenance planAdequate (10/12/2016)
Letter (8/2016) (pdf) (26.06 KB)
August 26, 2016
and
FR Notice (9/2016) (pdf) (191 KB, published September 27, 2016)
Budgets found adequate through the adequacy review process.
1997 8-hour ozonemaintenance planAdequate (3/11/2010)
Letter (1/2010) (pdf) (81.14 KB)
January 14, 2010
and
FR Notice (2/2010) (pdf) (142 KB, published February 24, 2010)
Budgets found adequate through the adequacy review process.
attainment demonstrationAdequate (6/27/2008)
Letter (5/2008) (pdf) (90.88 KB)
May 6, 2008
and
FR Notice (6/2008) (pdf) (148 KB, published June 12, 2008)
Budgets found adequate through the adequacy review process.
Cleveland - Akronpm2.5maintenance planAdequate (9/18/2013)
FR Notice (9/2013) (pdf) (242 KB, published September 18, 2013)
Budgets found adequate through SIP approval process.
attainment demonstrationAdequate (2/10/2010)
Letter (12/2009) (pdf) (76.32 KB)
December 7, 2009
and
FR Notice (1/2010) (pdf) (143 KB, published January 26, 2010)
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 ozonemaintenance planAdequate (10/12/2016)
Letter (8/2016) (pdf) (24.87 KB)
August 23, 2016
and
FR Notice (9/2016) (pdf) (191 KB, published September 27, 2016)
Budgets found adequate through the adequacy review process.
1997 8-hour ozonemaintenance planAdequate (6/04/2009)
Letter (3/2009) (pdf) (61.6 KB)
March 30, 2009
and
FR Notice (5/2009)(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 ozonemaintenance planAdequate (8/29/2019)
Letter (6/2019) (pdf) (312.91 KB, June 5, 2019) and
FR Notice (8/2019) (pdf) (194 KB, published August 14, 2019)
Budgets found adequate through the adequacy process.
2008 8-hour ozonemaintenance planAdequate (10/12/2016)
Letter (8/2016) (pdf) (24.79 KB)
August 23, 2016
and
FR Notice (9/2016) (191 KB, published September 27, 2016)
Budgets found adequate through the adequacy process.
1997 pm2.5maintenance planAdequate (11/7/2013)
FR Final Rule (11/2013) (pdf) (258 KB, published November 7, 2013)
Budgets found adequate through the SIP approval process.
attainment demonstrationwithdrawnAttainment plan budgets prepared with Mobile 6.2 replaced with maintenance plan budgets prepared using MOVES.
1997 8-hour ozonemaintenance planAdequate (6/4/2009)
Letter (3/2009) (pdf) (53.96 KB)
March 30, 2009
and
FR Notice (5/2009) (pdf) (139 KB, published May 20, 2009)
Budgets found adequate through the adequacy review process.
Cuyahoga Countycarbon monoxidelimited maintenance planAdequate (7/31/2006)
FR Notice (6/2006)(pdf) (153 KB, published June 1, 2006)
Budgets adequate through SIP approval process.
Dayton - Springfieldpm2.5maintenance planAdequate (9/26/2013)
FR Notice (9/2013) (pdf) (237 KB, published September 26, 2013)
Budgets adequate through SIP approval process.
attainment demonstrationwithdrawnAttainment plan budgets prepared with Mobile 6.2 replaced with maintenance plan budgets prepared using MOVES.
 8-hour ozonemaintenance planAdequate (4/18/2007)
Letter (2/2007) (pdf) (58.32 KB)
February 9, 2007
and
FR Notice (6/2006) (pdf) (153 KB, published June 1, 2006)
Budgets found adequate through the adequacy review process.
Huntington Ashlandpm2.5maintenance planAdequate (10/14/2011)
Letter (8/2011) (pdf) (973.53 KB)
August 11, 2011
and
FR Notice (9/2011) (pdf) (145 KB, published September 29, 2011)
Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
attainment demonstrationAdequate (12/22/2009)
FR Notice (12/2009) (pdf) (134 KB, published December 7, 2009)
Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Lima8-hour ozonemaintenance planAdequate (4/18/2007)
Letter (2/2007) (pdf) (58.32 KB)
February 9, 2007
and
FR Notice (6/2006) (pdf) (154 KB, published June 1, 2006)
Budgets found adequate through the adequacy review process.
Parkersburg - Mariettapm2.5maintenance planAdequate (8/29/2013)
FR Notice (8/2013) (pdf) (237 KB, published August 29, 2013)
Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
8-hour ozonemaintenance planAdequate (4/18/2007)
Letter (12/2006) (pdf) (66.13 KB)
December 28, 2006
and
FR Notice (8/2013) (pdf) (237 KB, published August 29, 2013)
Budgets found adequate through the adequacy review process.
Steubenville - Weirton pm2.5attainment demonstrationAdequate (2/10/2010)
Letter (12/2009) (pdf) (73.33 KB)
December 7, 2009
and
FR Notice (1/2010) (pdf) (138 KB, published January 26, 2010)
Budgets found adequate through the adequacy review process.
 8-hour ozonemaintenance planAdequate (4/18/2007)
Letter (1/2007) (pdf) (54.22 KB)
January 22, 2007
and
FR Notice (6/2006) (pdf) (154 KB, published June 1, 2006)
Budgets found adequate through the adequacy review process.
Toledo (Lucas and Wood Counties)8-hour ozonemaintenance planAdequate (8/9/2007)
FR Notice (8/2007) (pdf) (158 KB, published August 9, 2007)
Budgets found adequate through SIP approval process.
Washington Countypm2.5attainment demonstrationAdequate (12/22/2009)
FR Notice (12/2009) (pdf) (136 KB, published December 7, 2009)
Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Wheeling (Belmont County)pm2.5maintenance planAdequate (8/29/2013)
FR Notice (8/2013) (pdf) (237 KB, published August 29, 2013)
Regional insignificance finding for PM2.5 and NOx made through the SIP approval process.
8-hour ozonemaintenance planAdequate (4/18/2007)
Letter (1/2007) (pdf) (68.23 KB)
January 22, 2007
and
FR Notice (6/2006) (pdf) (154 KB, published June 1, 2006)
Budgets found adequate through the adequacy review process.
Youngstown (Columbiana and Trumbull Counties)8-hour ozonemaintenance planAdequate (6/12/2007)
FR Notice (6/2007) (pdf) (160 KB, published June 12, 2007)
Budgets found adequate through SIP approval process.
Wisconsin
AreaPollutantSIP SubmissionFinding
(date budgets apply)
Additional Information/ Comments
Door County8-hour ozonemaintenance planAdequate(5/21/2010)
Letter (5/2010) (pdf) (98.77 KB)
May 2010
and
FR Notice (5/2010) (pdf) (144 KB, published May 6, 2010)
Budgets found adequate through the adequacy review process.
Wisconsin Portion of Chicago-Naperville, IL-IN-WI (Kenosha, Wisconsin)2008 8-hour ozonemaintenance planAdequate (4/11/2022)
FR Notice (4/2022) (pdf) (248 KB, published April 11, 2022)
Budgets found adequate through the adequacy review process.
attainment planAdequate (11/15/2017)
Letter (9/2017) (pdf) (284.38 KB, September 6, 2017)
FR Notice (10/2017) (pdf) (186 KB, published October 31, 2017)
budgets found adequate through the adequacy process.
early progress planAdequate (4/16/2015)
Letter (3/2015) (pdf) (45.66 KB)
March 13, 2015
and
FR Notice (4/2015) (pdf) (195 KB, published April 1, 2015)
Budgets found adequate through the adequacy review process.
Kewaunee County8-hour ozonemaintenance planAdequate (12/19/2007)
FR Notice (pdf) (145 KB)
Budgets found adequate through the adequacy review process.
Manitowoc2015 8-hour ozonemaintenance planAdequate (3/31/2022)
FR Notice (3/2022) (pdf) (236 KB, published March 31, 2022)
Budgets found adequate through the adequacy review process.
2008 8-hour ozonemaintenance planAdequate (5/21/2010)
Letter (5/2010) (pdf) (98.77 KB)
May 2010
and
FR Notice (5/2010) (pdf) (144 KB, published May 6, 2010)
Budgets found adequate through the adequacy review process.
Milwaukee8-hour ozonemaintenance planAdequate (7/31/2012)
FR Notice (7/2012) (pdf) (276 KB, published July 31, 2012)
Budgets found adequate through the SIP approval process.
Adequate (5/21/2010)
Letter (5/2010) (pdf) (98.77 KB)
May 2010
and
FR Notice (5/2010) (pdf) (144 KB, published May 6, 2010)
Budgets found adequate through the adequacy review process.
Sheboygan2008 8-hour ozoneAttainment plan/Adequate (4/20/2018)
Letter (1/2018) (pdf) (197.83 KB, January 17, 2018)
FR Notice (4/2018) (186 KB, published April 5, 2018)
budgets found adequate through the adequacy process.
1997 8-hour ozonemaintenance planAdequate (4/16/2015)
FR Notice (4/2015) (pdf) (195 KB, published April 1, 2015)
Budgets found adequate through the SIP approval process.
early progress planAdequate (4/16/2015)
Letter (3/2015) (pdf) (45.66 KB)
March 13, 2015
and
FR Notice (4/2015) (pdf) (195 KB, published April 1, 2015)
Budgets found adequate through the adequacy review process.
maintenance planAdequate (5/21/2010)
Letter (5/2010) (pdf) (98.77 KB)
May 2010
and
FR Notice (5/2010) (pdf) (144 KB, published May 6, 2010)
Budgets found adequate through the adequacy review process.

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