Ohio Nonattainment/Maintenance Status for Each County by Year for All Criteria Pollutants

Data is current as of March 31, 2024

Listed by County, NAAQS, Area. The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.

* The 1997 Primary Annual PM-2.5 NAAQS (level of 15 µg/m³) is revoked in attainment and maintenance areas for that NAAQS. For additional information see the PM-2.5 NAAQS SIP Requirements Final Rule, effective October 24, 2016. (81 FR 58009)

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Important Notes Download National Dataset: dbf   |   xls    |   Data dictionary (PDF)

County	NAAQS	Area Name	Nonattainment in Year	Redesignation to Maintenance	Classification	Whole or/ Part County	Population (2010)	State/ County FIPS Codes
OHIO
Adams County	PM-2.5 (1997)-NAAQS revoked	Huntington-Ashland, WV-KY-OH	05 06 07 08 09 10 11	12/31/2012 *	Former Subpart 1	Part	3,355	39/001
Allen County	8-Hour Ozone (1997)-NAAQS revoked	Lima, OH	04 05 06	06/15/2007	Former Subpart 1	Whole	106,331	39/003
Ashtabula County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	101,497	39/007
Ashtabula County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	101,497	39/007
Ashtabula County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	101,497	39/007
Ashtabula County	PM-2.5 (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Part	22,514	39/007
Belmont County	8-Hour Ozone (1997)-NAAQS revoked	Wheeling, WV-OH	04 05 06	06/15/2007	Former Subpart 1	Whole	70,400	39/013
Belmont County	PM-2.5 (1997)-NAAQS revoked	Wheeling, WV-OH	05 06 07 08 09 10 11 12	08/29/2013 *	Former Subpart 1	Whole	70,400	39/013
Butler County	1-Hour Ozone (1979)-NAAQS revoked	Cincinnati-Hamilton, OH-KY	92 93 94 95 96 97 98 99 00 01 02 03 04	06/14/2005	Moderate	Whole	368,130	39/017
Butler County	8-Hour Ozone (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	04 05 06 07 08 09	05/11/2010	Former Subpart 1	Whole	368,130	39/017
Butler County	8-Hour Ozone (2008)	Cincinnati, OH-KY-IN	12 13 14 15	12/16/2016	Marginal	Whole	368,130	39/017
Butler County	8-Hour Ozone (2015)	Cincinnati, OH-KY	18 19 20 21	06/09/2022	Marginal	Whole	368,130	39/017
Butler County	PM-2.5 (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	05 06 07 08 09 10 11 12 13 14 15 16	04/07/2017 *	Former Subpart 1	Whole	368,130	39/017
Clark County	1-Hour Ozone (1979)-NAAQS revoked	Dayton-Springfield, OH	92 93 94	07/05/1995	Moderate	Whole	138,333	39/023
Clark County	8-Hour Ozone (1997)-NAAQS revoked	Dayton-Springfield, OH	04 05 06	08/13/2007	Former Subpart 1	Whole	138,333	39/023
Clark County	PM-2.5 (1997)-NAAQS revoked	Dayton-Springfield, OH	05 06 07 08 09 10 11 12	09/26/2013 *	Former Subpart 1	Whole	138,333	39/023
Clermont County	1-Hour Ozone (1979)-NAAQS revoked	Cincinnati-Hamilton, OH-KY	92 93 94 95 96 97 98 99 00 01 02 03 04	06/14/2005	Moderate	Whole	197,363	39/025
Clermont County	8-Hour Ozone (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	04 05 06 07 08 09	05/11/2010	Former Subpart 1	Whole	197,363	39/025
Clermont County	8-Hour Ozone (2008)	Cincinnati, OH-KY-IN	12 13 14 15	12/16/2016	Marginal	Whole	197,363	39/025
Clermont County	8-Hour Ozone (2015)	Cincinnati, OH-KY	18 19 20 21	06/09/2022	Marginal	Whole	197,363	39/025
Clermont County	PM-2.5 (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	05 06 07 08 09 10 11 12 13 14 15 16	04/07/2017 *	Former Subpart 1	Whole	197,363	39/025
Clermont County	Sulfur Dioxide (2010)	Campbell-Clermont Counties, KY-OH	13 14 15	11/21/2016		Part	14,349	39/025
Clinton County	1-Hour Ozone (1979)-NAAQS revoked	Clinton County, OH	92 93 94 95	03/21/1996	Section 185A	Whole	42,040	39/027
Clinton County	8-Hour Ozone (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	04 05 06 07 08 09	05/11/2010	Former Subpart 1	Whole	42,040	39/027
Clinton County	8-Hour Ozone (2008)	Cincinnati, OH-KY-IN	12 13 14 15	12/16/2016	Marginal	Whole	42,040	39/027
Columbiana County	1-Hour Ozone (1979)-NAAQS revoked	Columbiana County, OH	92 93 94	03/10/1995	Incomplete Data	Whole	107,841	39/029
Columbiana County	8-Hour Ozone (1997)-NAAQS revoked	Youngstown-Warren-Sharon, OH-PA	04 05 06	06/12/2007	Former Subpart 1	Whole	107,841	39/029
Coshocton County	PM-2.5 (1997)-NAAQS revoked	Columbus, OH	05 06 07 08 09 10 11 12	11/07/2013 *	Former Subpart 1	Part	1,535	39/031
Coshocton County	Sulfur Dioxide (1971)	Coshocton County; Franklin Township, OH	92 93 94 95 96 97 98 99	07/05/2000		Part	1,229	39/031
Cuyahoga County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	1,280,122	39/035
Cuyahoga County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	1,280,122	39/035
Cuyahoga County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	1,280,122	39/035
Cuyahoga County	8-Hour Ozone (2015)	Cleveland, OH	18 19 20 21 22 23 24	/ /	Moderate	Whole	1,280,122	39/035
Cuyahoga County	Carbon Monoxide (1971)	Cleveland, OH	92 93	03/07/1994	Moderate <= 12.7ppm	Whole	1,280,122	39/035
Cuyahoga County	Lead (2008)	Cleveland, OH	10 11 12 13 14 15 16	07/31/2017		Part	7,816	39/035
Cuyahoga County	PM-10 (1987)	Cuyahoga County, OH	92 93 94 95 96 97 98 99 00	01/10/2001	Moderate	Whole	1,280,122	39/035
Cuyahoga County	PM-2.5 (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Whole	1,280,122	39/035
Cuyahoga County	PM-2.5 (2006)	Cleveland-Akron-Lorain, OH	09 10 11 12	09/18/2013	Former Subpart 1	Whole	1,280,122	39/035
Cuyahoga County	PM-2.5 (2012)	Cleveland, OH	15 16 17 18	04/12/2019	Moderate	Whole	1,280,122	39/035
Cuyahoga County	Sulfur Dioxide (1971)	Cuyahoga County, OH	92 93 94 95 96 97 98 99 00 01 02 03 04	02/28/2005		Part	996,159	39/035
Delaware County	1-Hour Ozone (1979)-NAAQS revoked	Columbus, OH	92 93 94 95	04/01/1996	Marginal	Whole	174,214	39/041
Delaware County	8-Hour Ozone (1997)-NAAQS revoked	Columbus, OH	04 05 06 07 08	09/15/2009	Former Subpart 1	Whole	174,214	39/041
Delaware County	8-Hour Ozone (2008)	Columbus, OH	12 13 14 15	12/21/2016	Marginal	Whole	174,214	39/041
Delaware County	8-Hour Ozone (2015)	Columbus, OH	18	08/21/2019	Marginal	Whole	174,214	39/041
Delaware County	PM-2.5 (1997)-NAAQS revoked	Columbus, OH	05 06 07 08 09 10 11 12	11/07/2013 *	Former Subpart 1	Whole	174,214	39/041
Fairfield County	8-Hour Ozone (1997)-NAAQS revoked	Columbus, OH	04 05 06 07 08	09/15/2009	Former Subpart 1	Whole	146,156	39/045
Fairfield County	8-Hour Ozone (2008)	Columbus, OH	12 13 14 15	12/21/2016	Marginal	Whole	146,156	39/045
Fairfield County	8-Hour Ozone (2015)	Columbus, OH	18	08/21/2019	Marginal	Whole	146,156	39/045
Fairfield County	PM-2.5 (1997)-NAAQS revoked	Columbus, OH	05 06 07 08 09 10 11 12	11/07/2013 *	Former Subpart 1	Whole	146,156	39/045
Franklin County	1-Hour Ozone (1979)-NAAQS revoked	Columbus, OH	92 93 94 95	04/01/1996	Marginal	Whole	1,163,414	39/049
Franklin County	8-Hour Ozone (1997)-NAAQS revoked	Columbus, OH	04 05 06 07 08	09/15/2009	Former Subpart 1	Whole	1,163,414	39/049
Franklin County	8-Hour Ozone (2008)	Columbus, OH	12 13 14 15	12/21/2016	Marginal	Whole	1,163,414	39/049
Franklin County	8-Hour Ozone (2015)	Columbus, OH	18	08/21/2019	Marginal	Whole	1,163,414	39/049
Franklin County	PM-2.5 (1997)-NAAQS revoked	Columbus, OH	05 06 07 08 09 10 11 12	11/07/2013 *	Former Subpart 1	Whole	1,163,414	39/049
Fulton County	Lead (2008)	Delta, OH	10 11 12 13 14 15 16 17	03/13/2018		Part	3,243	39/051
Gallia County	PM-2.5 (1997)-NAAQS revoked	Huntington-Ashland, WV-KY-OH	05 06 07 08 09 10 11	12/31/2012 *	Former Subpart 1	Part	4,275	39/053
Gallia County	Sulfur Dioxide (1971)	Gallia County; Addison Township, OH	92 93 94 95 96 97 98 99	07/05/2000		Part	2,197	39/053
Geauga County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	93,389	39/055
Geauga County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	93,389	39/055
Geauga County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	93,389	39/055
Geauga County	8-Hour Ozone (2015)	Cleveland, OH	18 19 20 21 22 23 24	/ /	Moderate	Whole	93,389	39/055
Greene County	1-Hour Ozone (1979)-NAAQS revoked	Dayton-Springfield, OH	92 93 94	07/05/1995	Moderate	Whole	161,573	39/057
Greene County	8-Hour Ozone (1997)-NAAQS revoked	Dayton-Springfield, OH	04 05 06	08/13/2007	Former Subpart 1	Whole	161,573	39/057
Greene County	PM-2.5 (1997)-NAAQS revoked	Dayton-Springfield, OH	05 06 07 08 09 10 11 12	09/26/2013 *	Former Subpart 1	Whole	161,573	39/057
Hamilton County	1-Hour Ozone (1979)-NAAQS revoked	Cincinnati-Hamilton, OH-KY	92 93 94 95 96 97 98 99 00 01 02 03 04	06/14/2005	Moderate	Whole	802,374	39/061
Hamilton County	8-Hour Ozone (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	04 05 06 07 08 09	05/11/2010	Former Subpart 1	Whole	802,374	39/061
Hamilton County	8-Hour Ozone (2008)	Cincinnati, OH-KY-IN	12 13 14 15	12/16/2016	Marginal	Whole	802,374	39/061
Hamilton County	8-Hour Ozone (2015)	Cincinnati, OH-KY	18 19 20 21	06/09/2022	Marginal	Whole	802,374	39/061
Hamilton County	PM-2.5 (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	05 06 07 08 09 10 11 12 13 14 15 16	04/07/2017 *	Former Subpart 1	Whole	802,374	39/061
Jefferson County	1-Hour Ozone (1979)-NAAQS revoked	Steubenville, OH	92 93 94	03/10/1995	Section 185A	Whole	69,709	39/081
Jefferson County	8-Hour Ozone (1997)-NAAQS revoked	Steubenville-Weirton, OH-WV	04 05 06	06/15/2007	Former Subpart 1	Whole	69,709	39/081
Jefferson County	PM-10 (1987)	Jefferson County, OH	92 93 94 95 96 97 98 99 00	01/10/2001	Moderate	Part	3,472	39/081
Jefferson County	PM-2.5 (1997)-NAAQS revoked	Steubenville-Weirton, OH-WV	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Whole	69,709	39/081
Jefferson County	PM-2.5 (2006)	Steubenville-Weirton, OH-WV	09 10 11 12	09/18/2013	Former Subpart 1	Whole	69,709	39/081
Jefferson County	Sulfur Dioxide (1971)	Jefferson County; (part) Steubenville & Mingo Junction, OH	92 93 94 95 96 97 98	09/29/1999		Part	69,712	39/081
Jefferson County	Sulfur Dioxide (2010)	Steubenville, OH-WV	13 14 15 16 17 18	11/29/2019		Part	38,854	39/081
Knox County	8-Hour Ozone (1997)-NAAQS revoked	Columbus, OH	04 05 06 07 08	09/15/2009	Former Subpart 1	Whole	60,921	39/083
Knox County	8-Hour Ozone (2008)	Columbus, OH	12 13 14 15	12/21/2016	Marginal	Whole	60,921	39/083
Lake County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	230,041	39/085
Lake County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	230,041	39/085
Lake County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	230,041	39/085
Lake County	8-Hour Ozone (2015)	Cleveland, OH	18 19 20 21 22 23 24	/ /	Moderate	Whole	230,041	39/085
Lake County	PM-2.5 (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Whole	230,041	39/085
Lake County	PM-2.5 (2006)	Cleveland-Akron-Lorain, OH	09 10 11 12	09/18/2013	Former Subpart 1	Whole	230,041	39/085
Lake County	Sulfur Dioxide (1971)	Lake County; (part) Eastlake, Timberlake, Lakeline, Willoughby, Mentor, OH	92 93 94 95 96 97 98	09/29/1999		Part	229,760	39/085
Lake County	Sulfur Dioxide (2010)	Lake County, OH	13 14 15 16 17 18	05/14/2019		Whole	230,041	39/085
Lawrence County	PM-2.5 (1997)-NAAQS revoked	Huntington-Ashland, WV-KY-OH	05 06 07 08 09 10 11	12/31/2012 *	Former Subpart 1	Whole	62,450	39/087
Licking County	1-Hour Ozone (1979)-NAAQS revoked	Columbus, OH	92 93 94 95	04/01/1996	Marginal	Whole	166,492	39/089
Licking County	8-Hour Ozone (1997)-NAAQS revoked	Columbus, OH	04 05 06 07 08	09/15/2009	Former Subpart 1	Whole	166,492	39/089
Licking County	8-Hour Ozone (2008)	Columbus, OH	12 13 14 15	12/21/2016	Marginal	Whole	166,492	39/089
Licking County	8-Hour Ozone (2015)	Columbus, OH	18	08/21/2019	Marginal	Whole	166,492	39/089
Licking County	PM-2.5 (1997)-NAAQS revoked	Columbus, OH	05 06 07 08 09 10 11 12	11/07/2013 *	Former Subpart 1	Whole	166,492	39/089
Logan County	Lead (2008)	Bellefontaine, OH	10 11 12 13	09/26/2014		Part	6,220	39/091
Lorain County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	301,356	39/093
Lorain County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	301,356	39/093
Lorain County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	301,356	39/093
Lorain County	8-Hour Ozone (2015)	Cleveland, OH	18 19 20 21 22 23 24	/ /	Moderate	Whole	301,356	39/093
Lorain County	PM-2.5 (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Whole	301,356	39/093
Lorain County	PM-2.5 (2006)	Cleveland-Akron-Lorain, OH	09 10 11 12	09/18/2013	Former Subpart 1	Whole	301,356	39/093
Lorain County	PM-2.5 (2012)	Cleveland, OH	15 16 17 18	04/12/2019	Moderate	Whole	301,356	39/093
Lorain County	Sulfur Dioxide (1971)	Lorain County, OH	92 93 94 95 96 97 98 99	07/05/2000		Part	301,074	39/093
Lucas County	1-Hour Ozone (1979)-NAAQS revoked	Toledo, OH	92 93 94	08/01/1995	Moderate	Whole	441,815	39/095
Lucas County	8-Hour Ozone (1997)-NAAQS revoked	Toledo, OH	04 05 06	08/09/2007	Former Subpart 1	Whole	441,815	39/095
Lucas County	Sulfur Dioxide (1971)	Lucas County, OH	92 93 94 95 96 97 98 99 00 01 02 03	03/18/2004		Part	441,812	39/095
Madison County	8-Hour Ozone (1997)-NAAQS revoked	Columbus, OH	04 05 06 07 08	09/15/2009	Former Subpart 1	Whole	43,435	39/097
Madison County	8-Hour Ozone (2008)	Columbus, OH	12 13 14 15	12/21/2016	Marginal	Whole	43,435	39/097
Mahoning County	1-Hour Ozone (1979)-NAAQS revoked	Youngstown-Warren-Sharon, OH-PA (OH portion)	92 93 94 95	04/01/1996 [Split]	Marginal	Whole	238,823	39/099
Mahoning County	8-Hour Ozone (1997)-NAAQS revoked	Youngstown-Warren-Sharon, OH-PA	04 05 06	06/12/2007	Former Subpart 1	Whole	238,823	39/099
Medina County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	172,332	39/103
Medina County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	172,332	39/103
Medina County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	172,332	39/103
Medina County	8-Hour Ozone (2015)	Cleveland, OH	18 19 20 21 22 23 24	/ /	Moderate	Whole	172,332	39/103
Medina County	PM-2.5 (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Whole	172,332	39/103
Medina County	PM-2.5 (2006)	Cleveland-Akron-Lorain, OH	09 10 11 12	09/18/2013	Former Subpart 1	Whole	172,332	39/103
Miami County	1-Hour Ozone (1979)-NAAQS revoked	Dayton-Springfield, OH	92 93 94	07/05/1995	Moderate	Whole	102,506	39/109
Miami County	8-Hour Ozone (1997)-NAAQS revoked	Dayton-Springfield, OH	04 05 06	08/13/2007	Former Subpart 1	Whole	102,506	39/109
Montgomery County	1-Hour Ozone (1979)-NAAQS revoked	Dayton-Springfield, OH	92 93 94	07/05/1995	Moderate	Whole	535,153	39/113
Montgomery County	8-Hour Ozone (1997)-NAAQS revoked	Dayton-Springfield, OH	04 05 06	08/13/2007	Former Subpart 1	Whole	535,153	39/113
Montgomery County	PM-2.5 (1997)-NAAQS revoked	Dayton-Springfield, OH	05 06 07 08 09 10 11 12	09/26/2013 *	Former Subpart 1	Whole	535,153	39/113
Morgan County	Sulfur Dioxide (1971)	Morgan County: Center Township, OH	92 93	10/21/1994		Part	15,053	39/115
Morgan County	Sulfur Dioxide (2010)	Muskingum River, OH	13 14 15 16 17 18 19 20 21 22 23 24	/ /		Part	743	39/115
Portage County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	161,419	39/133
Portage County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	161,419	39/133
Portage County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	161,419	39/133
Portage County	8-Hour Ozone (2015)	Cleveland, OH	18 19 20 21 22 23 24	/ /	Moderate	Whole	161,419	39/133
Portage County	PM-2.5 (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Whole	161,419	39/133
Portage County	PM-2.5 (2006)	Cleveland-Akron-Lorain, OH	09 10 11 12	09/18/2013	Former Subpart 1	Whole	161,419	39/133
Preble County	1-Hour Ozone (1979)-NAAQS revoked	Preble County, OH	92 93 94	03/10/1995	Section 185A	Whole	42,270	39/135
Scioto County	PM-2.5 (1997)-NAAQS revoked	Huntington-Ashland, WV-KY-OH	05 06 07 08 09 10 11	12/31/2012 *	Former Subpart 1	Whole	79,499	39/145
Stark County	1-Hour Ozone (1979)-NAAQS revoked	Canton, OH	92 93 94 95	04/01/1996	Marginal	Whole	375,586	39/151
Stark County	8-Hour Ozone (1997)-NAAQS revoked	Canton-Massillon, OH	04 05 06	06/15/2007	Former Subpart 1	Whole	375,586	39/151
Stark County	Lead (2008)	Canton-Stark County, OH	23 24	/ /		Part	6,188	39/151
Stark County	PM-2.5 (1997)-NAAQS revoked	Canton-Massillon, OH	05 06 07 08 09 10 11 12	10/22/2013 *	Former Subpart 1	Whole	375,586	39/151
Stark County	PM-2.5 (2006)	Canton-Massillon, OH	09 10 11 12	10/22/2013	Former Subpart 1	Whole	375,586	39/151
Summit County	1-Hour Ozone (1979)-NAAQS revoked	Cleveland-Akron-Lorain, OH	92 93 94 95	05/07/1996	Moderate	Whole	541,781	39/153
Summit County	8-Hour Ozone (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	04 05 06 07 08	09/15/2009	Moderate	Whole	541,781	39/153
Summit County	8-Hour Ozone (2008)	Cleveland-Akron-Lorain, OH	12 13 14 15 16	01/06/2017	Marginal	Whole	541,781	39/153
Summit County	8-Hour Ozone (2015)	Cleveland, OH	18 19 20 21 22 23 24	/ /	Moderate	Whole	541,781	39/153
Summit County	PM-2.5 (1997)-NAAQS revoked	Cleveland-Akron-Lorain, OH	05 06 07 08 09 10 11 12	09/18/2013 *	Former Subpart 1	Whole	541,781	39/153
Summit County	PM-2.5 (2006)	Cleveland-Akron-Lorain, OH	09 10 11 12	09/18/2013	Former Subpart 1	Whole	541,781	39/153
Trumbull County	1-Hour Ozone (1979)-NAAQS revoked	Youngstown-Warren-Sharon, OH-PA (OH portion)	92 93 94 95	04/01/1996 [Split]	Marginal	Whole	210,312	39/155
Trumbull County	8-Hour Ozone (1997)-NAAQS revoked	Youngstown-Warren-Sharon, OH-PA	04 05 06	06/12/2007	Former Subpart 1	Whole	210,312	39/155
Warren County	1-Hour Ozone (1979)-NAAQS revoked	Cincinnati-Hamilton, OH-KY	92 93 94 95 96 97 98 99 00 01 02 03 04	06/14/2005	Moderate	Whole	212,693	39/165
Warren County	8-Hour Ozone (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	04 05 06 07 08 09	05/11/2010	Former Subpart 1	Whole	212,693	39/165
Warren County	8-Hour Ozone (2008)	Cincinnati, OH-KY-IN	12 13 14 15	12/16/2016	Marginal	Whole	212,693	39/165
Warren County	8-Hour Ozone (2015)	Cincinnati, OH-KY	18 19 20 21	06/09/2022	Marginal	Whole	212,693	39/165
Warren County	PM-2.5 (1997)-NAAQS revoked	Cincinnati-Hamilton, OH-KY-IN	05 06 07 08 09 10 11 12 13 14 15 16	04/07/2017 *	Former Subpart 1	Whole	212,693	39/165
Washington County	8-Hour Ozone (1997)-NAAQS revoked	Parkersburg-Marietta, WV-OH	04 05 06	06/15/2007	Former Subpart 1	Whole	61,778	39/167
Washington County	PM-2.5 (1997)-NAAQS revoked	Parkersburg-Marietta, WV-OH	05 06 07 08 09 10 11 12	08/29/2013 *	Former Subpart 1	Whole	61,778	39/167
Washington County	Sulfur Dioxide (1971)	Washington County: Waterford Township, OH	92 93	10/21/1994		Part	61,777	39/167
Washington County	Sulfur Dioxide (2010)	Muskingum River, OH	13 14 15 16 17 18 19 20 21 22 23 24	/ /		Part	3,713	39/167
Wood County	1-Hour Ozone (1979)-NAAQS revoked	Toledo, OH	92 93 94	08/01/1995	Moderate	Whole	125,488	39/173
Wood County	8-Hour Ozone (1997)-NAAQS revoked	Toledo, OH	04 05 06	08/09/2007	Former Subpart 1	Whole	125,488	39/173

Important Notes

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