Ohio—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

Open Table
Designated area Does not meet primary
standards
Does not meet secondary standards Cannot be classified Better than
national
standards
Athens County X
Clermont County X
Columbiana County X
Coshocton County X
Cuyahoga County X
The remainder of Cuyahoga County X
Gallia County X
Greene County X
Hamilton County X
Jefferson County:
The Cities of Steubenville and Mingo Junction, Townships of Steubenville, Island Creek, Cross Creek, Knox and Wells X
The remainder of Jefferson County X
Lake County:
The Cities of Eastlake, Timberlake, Lakeline, Willoughby (north of U.S. 20) and Mentor (north of U.S. 20, west of S.R. 306) X
The remainder of Lake County X
Lorain County X
Lucas County: The area east of Route 23 and west of the eastern boundary of Oregon Township X
The remainder of Lucas County:
Mahoning County X
Montgomery County X
Morgan County:
Center Township X
The remainder of Morgan County X
Summit County X
Trumbull County X
Washington County:
Waterford Township X
The remainder of Washington County X
All other counties in the State of Ohio X

Ohio—2010 Sulfur Dioxide NAAQS

[Primary]

Open Table
Designated area1 Designation
Date2 Type
Campbell-Clermont Counties, KY-OH 11/21/16 Attainment.
Clermont County (part)
Pierce Township
Lake County, OH 5/14/2019 Attainment.
Lake County
Muskingum River, OH 10/4/13 Nonattainment.
Morgan County (part)
Center Township
Washington County (part)
Waterford Township
Steubenville, OH-WV November 29, 2019 Attainment.
Jefferson County (part).
Cross Creek Township, Steubenville Township, Warren Township, Wells Township, Steubenville City.
Gallia County, OH 9/12/16 Unclassifiable.
Gallia County
Meigs County (part)
Bedford, Columbia, Rutland, Salem, Salisbury, and Scipio Townships
Clermont County, Ohio2 9/12/16 Attainment/Unclassifiable.
Clermont County (part)
Clermont County excluding Pierce Township
Adams County Attainment/Unclassifiable.
Allen County Attainment/Unclassifiable.
Ashland County Attainment/Unclassifiable.
Ashtabula County Attainment/Unclassifiable.
Athens County Attainment/Unclassifiable.
Auglaize County Attainment/Unclassifiable.
Belmont County Attainment/Unclassifiable.
Brown County Attainment/Unclassifiable.
Butler County Attainment/Unclassifiable
Carroll County Attainment/Unclassifiable.
Champaign County Attainment/Unclassifiable.
Clark County Attainment/Unclassifiable.
Clinton County Attainment/Unclassifiable.
Columbiana County Attainment/Unclassifiable.
Coshocton County Attainment/Unclassifiable.
Crawford County Attainment/Unclassifiable.
Cuyahoga County Attainment/Unclassifiable.
Darke County Attainment/Unclassifiable.
Defiance County Attainment/Unclassifiable.
Delaware County Attainment/Unclassifiable.
Erie County Attainment/Unclassifiable.
Fairfield County Attainment/Unclassifiable.
Fayette County Attainment/Unclassifiable.
Franklin County Attainment/Unclassifiable.
Fulton County Attainment/Unclassifiable.
Geauga County Attainment/Unclassifiable.
Greene County Attainment/Unclassifiable.
Guernsey County Attainment/Unclassifiable.
Hamilton County Attainment/Unclassifiable.
Hancock County Attainment/Unclassifiable.
Hardin County Attainment/Unclassifiable.
Harrison County Attainment/Unclassifiable.
Henry County Attainment/Unclassifiable.
Highland County Attainment/Unclassifiable.
Hocking County Attainment/Unclassifiable.
Holmes County Attainment/Unclassifiable.
Huron County Attainment/Unclassifiable.
Jackson County Attainment/Unclassifiable.
Jefferson County (part) (remainder) Attainment/Unclassifiable.
Knox County Attainment/Unclassifiable.
Lawrence County Attainment/Unclassifiable.
Licking County Attainment/Unclassifiable.
Logan County Attainment/Unclassifiable.
Lorain County Attainment/Unclassifiable.
Lucas County Attainment/Unclassifiable.
Madison County Attainment/Unclassifiable.
Mahoning County Attainment/Unclassifiable.
Marion County Attainment/Unclassifiable.
Medina County Attainment/Unclassifiable.
Meigs County (part) (remainder) Attainment/Unclassifiable.
Mercer County Attainment/Unclassifiable.
Miami County Attainment/Unclassifiable.
Monroe County Attainment/Unclassifiable.
Montgomery County Attainment/Unclassifiable.
Morgan County (part) (remainder) Attainment/Unclassifiable.
Morrow County Attainment/Unclassifiable.
Muskingum County Attainment/Unclassifiable.
Noble County Attainment/Unclassifiable.
Ottawa County Attainment/Unclassifiable.
Paulding County Attainment/Unclassifiable.
Perry County Attainment/Unclassifiable.
Pickaway County Attainment/Unclassifiable.
Pike County Attainment/Unclassifiable.
Portage County Attainment/Unclassifiable.
Preble County Attainment/Unclassifiable.
Putnam County Attainment/Unclassifiable.
Richland County Attainment/Unclassifiable.
Ross County Attainment/Unclassifiable.
Sandusky County Attainment/Unclassifiable.
Scioto County Attainment/Unclassifiable.
Seneca County Attainment/Unclassifiable.
Shelby County Attainment/Unclassifiable.
Stark County Attainment/Unclassifiable.
Summit County Attainment/Unclassifiable.
Trumbull County Attainment/Unclassifiable.
Tuscarawas County Attainment/Unclassifiable.
Union County Attainment/Unclassifiable.
Van Wert County Attainment/Unclassifiable.
Vinton County Attainment/Unclassifiable.
Warren County Attainment/Unclassifiable.
Washington County (part) (remainder) Attainment/Unclassifiable.
Wayne County Attainment/Unclassifiable.
Williams County Attainment/Unclassifiable.
Wood County Attainment/Unclassifiable.
Wyandot County Attainment/Unclassifiable.

1Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.

2This date is April 9, 2018, unless otherwise noted.

Ohio—Carbon Monoxide

Open Table
Designated Area Designation Classification
Date1 Type Date1 Type
Cleveland Area
Cuyahoga County 3/7/94 Attainment
Cincinnati
Hamilton County Unclassifiable/Attainment
Columbus
Franklin County Unclassifiable/Attainment
Adams County Unclassifiable/Attainment
Allen County Unclassifiable/Attainment
Ashland County Unclassifiable/Attainment
Ashtabula County Unclassifiable/Attainment
Athens County Unclassifiable/Attainment
Auglaize County Unclassifiable/Attainment
Belmont County Unclassifiable/Attainment
Brown County Unclassifiable/Attainment
Butler County Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Champaign County Unclassifiable/Attainment
Clark County Unclassifiable/Attainment
Clermont County Unclassifiable/Attainment
Clinton County Unclassifiable/Attainment
Columbiana County Unclassifiable/Attainment
Coshocton County Unclassifiable/Attainment
Crawford County Unclassifiable/Attainment
Darke County Unclassifiable/Attainment
Defiance County Unclassifiable/Attainment
Delaware County Unclassifiable/Attainment
Erie County Unclassifiable/Attainment
Fairfield County Unclassifiable/Attainment
Fayette County Unclassifiable/Attainment
Fulton County Unclassifiable/Attainment
Gallia County Unclassifiable/Attainment
Geauga County Unclassifiable/Attainment
Greene County Unclassifiable/Attainment
Guernsey County Unclassifiable/Attainment
Hancock County Unclassifiable/Attainment
Hardin County Unclassifiable/Attainment
Harrison County Unclassifiable/Attainment
Henry County Unclassifiable/Attainment
Highland County Unclassifiable/Attainment
Hocking County Unclassifiable/Attainment
Holmes County Unclassifiable/Attainment
Huron County Unclassifiable/Attainment
Jackson County Unclassifiable/Attainment
Jefferson County2 Unclassifiable/Attainment
Knox County Unclassifiable/Attainment
Lake County Unclassifiable/Attainment
Lawrence County Unclassifiable/Attainment
Licking County Unclassifiable/Attainment
Logan County Unclassifiable/Attainment
Lorain County Unclassifiable/Attainment
Lucas County Unclassifiable/Attainment
Madison County Unclassifiable/Attainment
Mahoning County Unclassifiable/Attainment
Marion County Unclassifiable/Attainment
Medina County Unclassifiable/Attainment
Meigs County Unclassifiable/Attainment
Mercer County Unclassifiable/Attainment
Miami County Unclassifiable/Attainment
Monroe County Unclassifiable/Attainment
Montgomery County Unclassifiable/Attainment
Morgan County Unclassifiable/Attainment
Morrow County Unclassifiable/Attainment
Muskingum County Unclassifiable/Attainment
Noble County Unclassifiable/Attainment
Ottawa County Unclassifiable/Attainment
Paulding County Unclassifiable/Attainment
Perry County Unclassifiable/Attainment
Pickaway County Unclassifiable/Attainment
Pike County Unclassifiable/Attainment
Portage County Unclassifiable/Attainment
Preble County Unclassifiable/Attainment
Putnam County Unclassifiable/Attainment
Richland County Unclassifiable/Attainment
Ross County Unclassifiable/Attainment
Sandusky County Unclassifiable/Attainment
Scioto County Unclassifiable/Attainment
Seneca County Unclassifiable/Attainment
Shelby County Unclassifiable/Attainment
Stark County Unclassifiable/Attainment
Summit County Unclassifiable/Attainment
Trumbull County Unclassifiable/Attainment
Tuscarawas County Unclassifiable/Attainment
Union County Unclassifiable/Attainment
Van Wert County Unclassifiable/Attainment
Vinton County Unclassifiable/Attainment
Warren County Unclassifiable/Attainment
Washington County Unclassifiable/Attainment
Wayne County Unclassifiable/Attainment
Williams County Unclassifiable/Attainment
Wood County Unclassifiable/Attainment
Wyandot County

1This date is November 15, 1990, unless otherwise noted.

2The listed designation does not reflect EPA action under section 107(d)(4)(A). At the date of enactment of the Clean Air Act Amendments, Jefferson County, Ohio; Brooke County, West Virginia; and Hancock County, West Virginia, were designated Unclassifiable/attainment, by operation of law, under section 107(d)(1)(C) of the Clean Air Act. However, these States and EPA are reviewing whether to confirm or reverse that designation under the process set out under section 107(d)(4)(A) and will publish a separate notice to that effect.

Ohio—Ozone (1-Hour Standard)3

Open Table
Designated area Designation Classification
Date1 Type Date1 Type
Canton Area:
Stark County Attainment
Cincinnati-Hamilton Area: 6/14/05 Attainment
Butler County
Clermont County
Hamilton County
Warren County
Cleveland-Akron-Lorain Area: Attainment
Ashtabula County
Cuyahoga County
Geauga County
Lake County
Lorain County
Medina County
Portage County
Summit County
Clinton County Area:
Clinton County Attainment
Columbiana County Area:
Columbiana County Attainment
Columbus Area:
Delaware County Attainment
Franklin County Attainment
Licking County Attainment
Dayton-Springfield Area:
Clark County Attainment
Greene County Attainment
Miami County Attainment
Montgomery County Attainment
Preble County Area:
Preble County Attainment
Steubenville Area:
Jefferson County Attainment
Toledo Area:
Lucas County Attainment
Wood County Attainment
Youngstown-Warren-Sharon Area:
Mahoning County Attainment
Trumbull County Attainment
Adams County Unclassifiable/Attainment
Allen County Unclassifiable/Attainment
Ashland County Unclassifiable/Attainment
Athens County Unclassifiable/Attainment
Auglaize County Unclassifiable/Attainment
Belmont County Unclassifiable/Attainment
Brown County Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Champaign County Unclassifiable/Attainment
Coshocton County Unclassifiable/Attainment
Crawford County Unclassifiable/Attainment
Darke County Unclassifiable/Attainment
Defiance County Unclassifiable/Attainment
Erie County Unclassifiable/Attainment
Fairfield County Unclassifiable/Attainment
Fayette County Unclassifiable/Attainment
Fulton County Unclassifiable/Attainment
Gallia County Unclassifiable/Attainment
Guernsey County Unclassifiable/Attainment
Hancock County Unclassifiable/Attainment
Hardin County Unclassifiable/Attainment
Harrison County Unclassifiable/Attainment
Henry County Unclassifiable/Attainment
Highland County Unclassifiable/Attainment
Hocking County Unclassifiable/Attainment
Holmes County Unclassifiable/Attainment
Huron County Unclassifiable/Attainment
Jackson County Unclassifiable/Attainment
Knox County Unclassifiable/Attainment
Lawrence County Unclassifiable/Attainment
Logan County Unclassifiable/Attainment
Madison County Unclassifiable/Attainment
Marion County Unclassifiable/Attainment
Meigs County Unclassifiable/Attainment
Mercer County Unclassifiable/Attainment
Monroe County Unclassifiable/Attainment
Morgan County Unclassifiable/Attainment
Morrow County Unclassifiable/Attainment
Muskingum County Unclassifiable/Attainment
Noble County Unclassifiable/Attainment
Ottawa County Unclassifiable/Attainment
Paulding County Unclassifiable/Attainment
Perry County Unclassifiable/Attainment
Pickaway County Unclassifiable/Attainment
Pike County Unclassifiable/Attainment
Putnam County Unclassifiable/Attainment
Richland County Unclassifiable/Attainment
Ross County Unclassifiable/Attainment
Sandusky County Unclassifiable/Attainment
Scioto County Unclassifiable/Attainment
Seneca County Unclassifiable/Attainment
Shelby County Unclassifiable/Attainment
Tuscarawas County Unclassifiable/Attainment
Union County Unclassifiable/Attainment
Van Wert County Unclassifiable/Attainment
Vinton County Unclassifiable/Attainment
Washington County Unclassifiable/Attainment
Wayne County Unclassifiable/Attainment
Williams County Unclassifiable/Attainment
Wyandot County Unclassifiable/Attainment

1This date is November 15, 1990, unless otherwise noted.

3The 1-hour standard is revoked effective June 15, 2005 for all areas in Ohio. The Canton, Cleveland-Akron-Lorain, Clinton Co, Columbus, Dayton-Springfield, Preble Co, Steubenville, Toledo, Youngstown-Warren-Sharon, and Columbiana Co. areas are maintenance areas for the 1-hour NAAQS for purposes of 40 CFR part 51 subpart X.

Ohio—PM-10

Open Table
Designated Area Designation Classification
Date Type Date Type
Cuyahoga County 1/10/01 Attainment
Jefferson County
The area bounded by Market Street (State Route 43) from the West Virginia/Ohio border west to Sunset Blvd. (U.S. Route 22), Sunset Blvd. west to the Steubenville Township/Cross Creek Township boundary, the Township boundary south to the Steubenville Corporation limit, the corporation boundary east to State Route 7, State Route 7 South to the Steubenville Township/Wells Township boundary, the Township boundary Unclassifiable east to the West Virginia/Ohio border, and North on the border to Market Street 1/10/01 Attainment
Rest of State 11/15/90 Unclassifiable

Ohio—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Open Table
Designated area Designationa Classification
Date1 Type Date Type
Canton-Massillon, OH:
Stark County 10/22/13 Attainment
Cincinnati-Hamilton, Ohio: 4/7/17 Attainment.
Butler County
Clermont County
Hamilton County
Warren County
Cleveland-Akron-Lorain, OH 9/18/13 Attainment
Ashtabula County (part)
Ashtabula Township
Cuyahoga County
Lake County
Lorain County
Medina County
Portage County
Summit County
Columbus, OH 11/7/13 Attainment
Coshocton County (part)
Franklin Township
Delaware County
Fairfield County
Franklin County
Licking County
Dayton-Springfield, OH 9/26/13 Attainment
Clark County
Greene County
Montgomery County
Huntington-Ashland, OH 12/31/12 Attainment
Adams County (part)
Monroe Township
Sprigg Township
Gallia County (part)
Addison Township
Cheshire Township
Lawrence County
Scioto County
Parkersburg-Marietta, WV-OH:
Washington County 8/29/13 Attainment
Steubenville-Weirton, OH-WV:
Jefferson County 9/18/13 Attainment
Toledo, OH:
Lucas County Unclassifiable/Attainment
Wood County Unclassifiable/Attainment
Wheeling, WV-OH:
Belmont County 8/29/13 Attainment
Youngstown-Warren-Sharon, OH-PA:
Columbiana County Unclassifiable/Attainment
Mahoning County Unclassifiable/Attainment
Trumbull County Unclassifiable/Attainment
Rest of State:
Adams County (remainder) Unclassifiable/Attainment
Allen County Unclassifiable/Attainment
Ashland County Unclassifiable/Attainment
Ashtabula County (remainder) Unclassifiable/Attainment
Athens County Unclassifiable/Attainment
Auglaize County Unclassifiable/Attainment
Brown County Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Champaign County Unclassifiable/Attainment
Clinton County Unclassifiable/Attainment
Coshocton County (remainder) Unclassifiable/Attainment
Crawford County Unclassifiable/Attainment
Darke County Unclassifiable/Attainment
Defiance County Unclassifiable/Attainment
Erie County Unclassifiable/Attainment
Fayette County Unclassifiable/Attainment
Fulton County Unclassifiable/Attainment
Gallia County (remainder) Unclassifiable/Attainment
Geauga County Unclassifiable/Attainment
Guernsey County Unclassifiable/Attainment
Hancock County Unclassifiable/Attainment
Hardin County Unclassifiable/Attainment
Harrison County Unclassifiable/Attainment
Henry County Unclassifiable/Attainment
Highland County Unclassifiable/Attainment
Hocking County Unclassifiable/Attainment
Holmes County Unclassifiable/Attainment
Huron County Unclassifiable/Attainment
Jackson County Unclassifiable/Attainment
Knox County Unclassifiable/Attainment
Logan County Unclassifiable/Attainment
Madison County Unclassifiable/Attainment
Marion County Unclassifiable/Attainment
Meigs County Unclassifiable/Attainment
Mercer County Unclassifiable/Attainment
Miami County Unclassifiable/Attainment
Monroe County Unclassifiable/Attainment
Morgan County Unclassifiable/Attainment
Morrow County Unclassifiable/Attainment
Muskingum County Unclassifiable/Attainment
Noble County Unclassifiable/Attainment
Ottawa County Unclassifiable/Attainment
Paulding County Unclassifiable/Attainment
Perry County Unclassifiable/Attainment
Pickaway County Unclassifiable/Attainment
Pike County Unclassifiable/Attainment
Preble County Unclassifiable/Attainment
Putnam County Unclassifiable/Attainment
Richland County Unclassifiable/Attainment
Ross County Unclassifiable/Attainment
Sandusky County Unclassifiable/Attainment
Seneca County Unclassifiable/Attainment
Shelby County Unclassifiable/Attainment
Tuscarawas County Unclassifiable/Attainment
Union County Unclassifiable/Attainment
Van Wert County Unclassifiable/Attainment
Vinton County Unclassifiable/Attainment
Wayne County Unclassifiable/Attainment
Williams County Unclassifiable/Attainment
Wyandot County Unclassifiable/Attainment

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after January 5, 2005, unless otherwise noted.

Ohio—2012 Annual PM2.5 NAAQS

[Primary]

Open Table
Designated area1 Designation Classification
Date2 Type Date2 Type
Cleveland, OH:
Cuyahoga County 4/12/2019 Attainment Moderate
Lorain County 4/12/2019 Attainment Moderate
Rest of State:
Adams County Unclassifiable/Attainment
Allen County Unclassifiable/Attainment
Ashland County Unclassifiable/Attainment
Ashtabula County Unclassifiable/Attainment
Athens County Unclassifiable/Attainment
Auglaize County Unclassifiable/Attainment
Belmont County Unclassifiable/Attainment
Brown County Unclassifiable/Attainment
Butler County Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Champaign County Unclassifiable/Attainment
Clark County Unclassifiable/Attainment
Clermont County Unclassifiable/Attainment
Clinton County Unclassifiable/Attainment
Columbiana County Unclassifiable/Attainment
Coshocton County Unclassifiable/Attainment
Crawford County Unclassifiable/Attainment
Darke County Unclassifiable/Attainment
Defiance County Unclassifiable/Attainment
Delaware County Unclassifiable/Attainment
Erie County Unclassifiable/Attainment
Fairfield County Unclassifiable/Attainment
Fayette County Unclassifiable/Attainment
Franklin County Unclassifiable/Attainment
Fulton County Unclassifiable/Attainment
Gallia County Unclassifiable/Attainment
Geauga County Unclassifiable/Attainment
Greene County Unclassifiable/Attainment
Guernsey County Unclassifiable/Attainment
Hamilton County Unclassifiable/Attainment
Hancock County Unclassifiable/Attainment
Hardin County Unclassifiable/Attainment
Harrison County Unclassifiable/Attainment
Henry County Unclassifiable/Attainment
Highland County Unclassifiable/Attainment
Hocking County Unclassifiable/Attainment
Holmes County Unclassifiable/Attainment
Huron County Unclassifiable/Attainment
Jackson County Unclassifiable/Attainment
Jefferson County Unclassifiable/Attainment
Knox County Unclassifiable/Attainment
Lake County Unclassifiable/Attainment
Lawrence County Unclassifiable/Attainment
Licking County Unclassifiable/Attainment
Logan County Unclassifiable/Attainment
Lucas County Unclassifiable/Attainment
Madison County Unclassifiable/Attainment
Mahoning County Unclassifiable/Attainment
Marion County Unclassifiable/Attainment
Medina County Unclassifiable/Attainment
Meigs County Unclassifiable/Attainment
Mercer County Unclassifiable/Attainment
Miami County Unclassifiable/Attainment
Monroe County Unclassifiable/Attainment
Montgomery County Unclassifiable/Attainment
Morgan County Unclassifiable/Attainment
Morrow County Unclassifiable/Attainment
Muskingum County Unclassifiable/Attainment
Noble County Unclassifiable/Attainment
Ottawa County Unclassifiable/Attainment
Paulding County Unclassifiable/Attainment
Perry County Unclassifiable/Attainment
Pickaway County Unclassifiable/Attainment
Pike County Unclassifiable/Attainment
Portage County Unclassifiable/Attainment
Preble County Unclassifiable/Attainment
Putnam County Unclassifiable/Attainment
Richland County Unclassifiable/Attainment
Ross County Unclassifiable/Attainment
Sandusky County Unclassifiable/Attainment
Scioto County Unclassifiable/Attainment
Seneca County Unclassifiable/Attainment
Shelby County Unclassifiable/Attainment
Stark County Unclassifiable/Attainment
Summit County Unclassifiable/Attainment
Trumbull County Unclassifiable/Attainment
Tuscarawas County Unclassifiable/Attainment
Union County Unclassifiable/Attainment
Van Wert County Unclassifiable/Attainment
Vinton County Unclassifiable/Attainment
Warren County Unclassifiable/Attainment
Washington County Unclassifiable/Attainment
Wayne County Unclassifiable/Attainment
Williams County Unclassifiable/Attainment
Wood County Unclassifiable/Attainment
Wyandot County Unclassifiable/Attainment

1Includes areas of Indian country located in each county or area, except as otherwise specified.

2This date is April 15, 2015, unless otherwise noted.

Ohio—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Open Table
Designated area Designationa Classification
Type Date1 Date Type
Canton-Massillon, OH:
Stark County Unclassifiable/Attainment
Cleveland-Akron-Lorain, OH: Unclassifiable/Attainment
Cuyahoga County
Lake County
Lorain County
Medina County
Portage County
Summit County
Steubenville-Weirton, OH-WV:
Jefferson County Unclassifiable/Attainment
Rest of State:
Adams County Unclassifiable/Attainment
Allen County Unclassifiable/Attainment
Ashland County Unclassifiable/Attainment
Ashtabula County Unclassifiable/Attainment
Athens County Unclassifiable/Attainment
Auglaize County Unclassifiable/Attainment
Belmont County Unclassifiable/Attainment
Brown County Unclassifiable/Attainment
Butler County Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Champaign County Unclassifiable/Attainment
Clark County Unclassifiable/Attainment
Clermont County Unclassifiable/Attainment
Clinton County Unclassifiable/Attainment
Columbiana County Unclassifiable/Attainment
Coshocton County Unclassifiable/Attainment
Crawford County Unclassifiable/Attainment
Darke County Unclassifiable/Attainment
Defiance County Unclassifiable/Attainment
Delaware County Unclassifiable/Attainment
Erie County Unclassifiable/Attainment
Fairfield County Unclassifiable/Attainment
Fayette County Unclassifiable/Attainment
Franklin County Unclassifiable/Attainment
Fulton County Unclassifiable/Attainment
Gallia County Unclassifiable/Attainment
Geauga County Unclassifiable/Attainment
Greene County Unclassifiable/Attainment
Guernsey County Unclassifiable/Attainment
Hamilton County Unclassifiable/Attainment
Hancock County Unclassifiable/Attainment
Hardin County Unclassifiable/Attainment
Harrison County Unclassifiable/Attainment
Henry County Unclassifiable/Attainment
Highland County Unclassifiable/Attainment
Hocking County Unclassifiable/Attainment
Holmes County Unclassifiable/Attainment
Huron County Unclassifiable/Attainment
Jackson County Unclassifiable/Attainment
Knox County Unclassifiable/Attainment
Lawrence County Unclassifiable/Attainment
Licking County Unclassifiable/Attainment
Logan County Unclassifiable/Attainment
Lucas County Unclassifiable/Attainment
Madison County Unclassifiable/Attainment
Mahoning County Unclassifiable/Attainment
Marion County Unclassifiable/Attainment
Meigs County Unclassifiable/Attainment
Mercer County Unclassifiable/Attainment
Miami County Unclassifiable/Attainment
Monroe County Unclassifiable/Attainment
Montgomery County Unclassifiable/Attainment
Morgan County Unclassifiable/Attainment
Morrow County Unclassifiable/Attainment
Muskingum County Unclassifiable/Attainment
Noble County Unclassifiable/Attainment
Ottawa County Unclassifiable/Attainment
Paulding County Unclassifiable/Attainment
Perry County Unclassifiable/Attainment
Pickaway County Unclassifiable/Attainment
Pike County Unclassifiable/Attainment
Preble County Unclassifiable/Attainment
Putnam County Unclassifiable/Attainment
Richland County Unclassifiable/Attainment
Ross County Unclassifiable/Attainment
Sandusky County Unclassifiable/Attainment
Scioto County Unclassifiable/Attainment
Seneca County Unclassifiable/Attainment
Shelby County Unclassifiable/Attainment
Trumbull County Unclassifiable/Attainment
Tuscarawas County Unclassifiable/Attainment
Union County Unclassifiable/Attainment
Van Wert County Unclassifiable/Attainment
Vinton County Unclassifiable/Attainment
Warren County Unclassifiable/Attainment
Washington County Unclassifiable/Attainment
Wayne County Unclassifiable/Attainment
Williams County Unclassifiable/Attainment
Wood County Unclassifiable/Attainment
Wyandot County Unclassifiable/Attainment

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after January 5, 2005, unless otherwise noted.

Ohio—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Open Table
Designated area Designationa Classification
Date1 Type Date Type
Canton-Massillon, OH:
Stark County 10/22/13 Attainment.
Cleveland-Akron-Lorain, OH 9/18/13 Attainment.
Cuyahoga County
Lake County
Lorain County
Medina County
Portage County
Summit County
Steubenville-Weirton, OH-WV:
Jefferson County 9/18/13 Attainment.
Rest of State:
Adams County Unclassifiable/Attainment
Allen County Unclassifiable/Attainment
Ashland County Unclassifiable/Attainment
Ashtabula County Unclassifiable/Attainment
Athens County Unclassifiable/Attainment
Auglaize County Unclassifiable/Attainment
Belmont County Unclassifiable/Attainment
Brown County Unclassifiable/Attainment
Butler County Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Champaign County Unclassifiable/Attainment
Clark County Unclassifiable/Attainment
Clermont County Unclassifiable/Attainment
Clinton County Unclassifiable/Attainment
Columbiana County Unclassifiable/Attainment
Coshocton County Unclassifiable/Attainment
Crawford County Unclassifiable/Attainment
Darke County Unclassifiable/Attainment
Defiance County Unclassifiable/Attainment
Delaware County Unclassifiable/Attainment
Erie County Unclassifiable/Attainment
Fairfield County Unclassifiable/Attainment
Fayette County Unclassifiable/Attainment
Franklin County Unclassifiable/Attainment
Fulton County Unclassifiable/Attainment
Gallia County Unclassifiable/Attainment
Geauga County Unclassifiable/Attainment
Greene County Unclassifiable/Attainment
Guernsey County Unclassifiable/Attainment
Hamilton County Unclassifiable/Attainment
Hancock County Unclassifiable/Attainment
Hardin County Unclassifiable/Attainment
Harrison County Unclassifiable/Attainment
Henry County Unclassifiable/Attainment
Highland County Unclassifiable/Attainment
Hocking County Unclassifiable/Attainment
Holmes County Unclassifiable/Attainment
Huron County Unclassifiable/Attainment
Jackson County Unclassifiable/Attainment
Knox County Unclassifiable/Attainment
Lawrence County Unclassifiable/Attainment
Licking County Unclassifiable/Attainment
Logan County Unclassifiable/Attainment
Lucas County Unclassifiable/Attainment
Madison County Unclassifiable/Attainment
Mahoning County Unclassifiable/Attainment
Marion County Unclassifiable/Attainment
Meigs County Unclassifiable/Attainment
Mercer County Unclassifiable/Attainment
Miami County Unclassifiable/Attainment
Monroe County Unclassifiable/Attainment
Montgomery County Unclassifiable/Attainment
Morgan County Unclassifiable/Attainment
Morrow County Unclassifiable/Attainment
Muskingum County Unclassifiable/Attainment
Noble County Unclassifiable/Attainment
Ottawa County Unclassifiable/Attainment
Paulding County Unclassifiable/Attainment
Perry County Unclassifiable/Attainment
Pickaway County Unclassifiable/Attainment
Pike County Unclassifiable/Attainment
Preble County Unclassifiable/Attainment
Putnam County Unclassifiable/Attainment
Richland County Unclassifiable/Attainment
Ross County Unclassifiable/Attainment
Sandusky County Unclassifiable/Attainment
Scioto County Unclassifiable/Attainment
Seneca County Unclassifiable/Attainment
Shelby County Unclassifiable/Attainment
Trumbull County Unclassifiable/Attainment
Tuscarawas County Unclassifiable/Attainment
Union County Unclassifiable/Attainment
Van Wert County Unclassifiable/Attainment
Vinton County Unclassifiable/Attainment
Warren County Unclassifiable/Attainment
Washington County Unclassifiable/Attainment
Wayne County Unclassifiable/Attainment
Williams County Unclassifiable/Attainment
Wood County Unclassifiable/Attainment
Wyandot County Unclassifiable/Attainment

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 30 days after November 13, 2009, unless otherwise noted.

Ohio—NO2 (1971 Annual Standard)

Open Table
Designated area Does not meet primary standards Cannot be classified or better than national standards
State of Ohio X

Ohio—NO2 (2010 1-Hour Standard)

Open Table
Designated area Designationa
Date1 Type
Adams County Unclassifiable/Attainment.
Allen County Unclassifiable/Attainment.
Ashland County Unclassifiable/Attainment.
Ashtabula County Unclassifiable/Attainment.
Athens County Unclassifiable/Attainment.
Auglaize County Unclassifiable/Attainment.
Belmont County Unclassifiable/Attainment.
Brown County Unclassifiable/Attainment.
Butler County Unclassifiable/Attainment.
Carroll County Unclassifiable/Attainment.
Champaign County Unclassifiable/Attainment.
Clark County Unclassifiable/Attainment.
Clermont County Unclassifiable/Attainment.
Clinton County Unclassifiable/Attainment.
Columbiana County Unclassifiable/Attainment.
Coshocton County Unclassifiable/Attainment.
Crawford County Unclassifiable/Attainment.
Cuyahoga County Unclassifiable/Attainment.
Darke County Unclassifiable/Attainment.
Defiance County Unclassifiable/Attainment.
Delaware County Unclassifiable/Attainment.
Erie County Unclassifiable/Attainment.
Fairfield County Unclassifiable/Attainment.
Fayette County Unclassifiable/Attainment.
Franklin County Unclassifiable/Attainment.
Fulton County Unclassifiable/Attainment.
Gallia County Unclassifiable/Attainment.
Geauga County Unclassifiable/Attainment.
Greene County Unclassifiable/Attainment.
Guernsey County Unclassifiable/Attainment.
Hamilton County Unclassifiable/Attainment.
Hancock County Unclassifiable/Attainment.
Hardin County Unclassifiable/Attainment.
Harrison County Unclassifiable/Attainment.
Henry County Unclassifiable/Attainment.
Highland County Unclassifiable/Attainment.
Hocking County Unclassifiable/Attainment.
Holmes County Unclassifiable/Attainment.
Huron County Unclassifiable/Attainment.
Jackson County Unclassifiable/Attainment.
Jefferson County Unclassifiable/Attainment.
Knox County Unclassifiable/Attainment.
Lake County Unclassifiable/Attainment.
Lawrence County Unclassifiable/Attainment.
Licking County Unclassifiable/Attainment.
Logan County Unclassifiable/Attainment.
Lorain County Unclassifiable/Attainment.
Lucas County Unclassifiable/Attainment.
Madison County Unclassifiable/Attainment.
Mahoning County Unclassifiable/Attainment.
Marion County Unclassifiable/Attainment.
Medina County Unclassifiable/Attainment.
Meigs County Unclassifiable/Attainment.
Mercer County Unclassifiable/Attainment.
Miami County Unclassifiable/Attainment.
Monroe County Unclassifiable/Attainment.
Montgomery County Unclassifiable/Attainment.
Morgan County Unclassifiable/Attainment.
Morrow County Unclassifiable/Attainment.
Muskingum County Unclassifiable/Attainment.
Noble County Unclassifiable/Attainment.
Ottawa County Unclassifiable/Attainment.
Paulding County Unclassifiable/Attainment.
Perry County Unclassifiable/Attainment.
Pickaway County Unclassifiable/Attainment.
Pike County Unclassifiable/Attainment.
Portage County Unclassifiable/Attainment.
Preble County Unclassifiable/Attainment.
Putnam County Unclassifiable/Attainment.
Richland County Unclassifiable/Attainment.
Ross County Unclassifiable/Attainment.
Sandusky County Unclassifiable/Attainment.
Scioto County Unclassifiable/Attainment.
Seneca County Unclassifiable/Attainment.
Shelby County Unclassifiable/Attainment.
Stark County Unclassifiable/Attainment.
Summit County Unclassifiable/Attainment.
Trumbull County Unclassifiable/Attainment.
Tuscarawas County Unclassifiable/Attainment.
Union County Unclassifiable/Attainment.
Van Wert County Unclassifiable/Attainment.
Vinton County Unclassifiable/Attainment.
Warren County Unclassifiable/Attainment.
Washington County Unclassifiable/Attainment.
Wayne County Unclassifiable/Attainment.
Williams County Unclassifiable/Attainment.
Wood County Unclassifiable/Attainment.
Wyandot County Unclassifiable/Attainment.

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after October 31, 2011, unless otherwise noted.

Ohio—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Open Table
Designated area Designationa Category/classification
Date1 Type Date1 Type
Canton-Massillon, OH: Stark County 6/15/07 Attainment.
Cincinnati-Hamilton, OH-KY-IN:
Butler County May 11, 2010 Attainment        
Clermont County                
Clinton County                
Hamilton County                
Warren County                
Cleveland-Akron-Lorain, OH:
Ashtabula County
Cuyahoga County 9/15/2009 Attainment.
Geauga County
Lake County
Lorain County
Medina County
Portage County
Summit County
Columbus, OH:
Delaware County 9/15/09 Attainment
Fairfield County
Franklin County
Knox County
Licking County
Madison County
Dayton-Springfield, OH:
Clark County August 13, 2007 Attainment.
Greene County.
Miami County.
Montgomery County.
Lima, OH: Allen County 6/15/07 Attainment.
Parkersburg-Marietta, WV-OH: Washington County 6/15/07 Attainment.
Steubenville-Weirton, OH-WV: Jefferson County 6/15/07 Attainment.
Toledo Area:
Lucas County 08/09/07 Attainment.
Wood County 08/09/07 Attainment.
Wheeling, WV-OH: Belmont County 6/15/2007 Attainment.
Youngstown-Warren-Sharon, PA-OH: June 12, 2007
Columbiana County Attainment
Mahoning County Attainment
Trumbull County Attainment
Rest of State:
Adams County Unclassifiable/Attainment
Ashland County Unclassifiable/Attainment
Athens County
Auglaize County Unclassifiable/Attainment
Brown County Unclassifiable/Attainment
Carroll County Unclassifiable/Attainment
Champaign County Unclassifiable/Attainment
Coshocton County Unclassifiable/Attainment
Crawford County Unclassifiable/Attainment
Darke County Unclassifiable/Attainment
Defiance County Unclassifiable/Attainment
Erie County Unclassifiable/Attainment
Fayette County Unclassifiable/Attainment
Fulton County Unclassifiable/Attainment
Gallia County Unclassifiable/Attainment
Guernsey County Unclassifiable/Attainment
Hancock County Unclassifiable/Attainment
Hardin County Unclassifiable/Attainment
Harrison County Unclassifiable/Attainment
Henry County Unclassifiable/Attainment
Highland County Unclassifiable/Attainment
Hocking County Unclassifiable/Attainment
Holmes County Unclassifiable/Attainment
Huron County Unclassifiable/Attainment
Jackson County Unclassifiable/Attainment
Lawrence County Unclassifiable/Attainment
Logan County Unclassifiable/Attainment
Marion County Unclassifiable/Attainment
Meigs County Unclassifiable/Attainment
Mercer County Unclassifiable/Attainment
Monroe County Unclassifiable/Attainment
Morgan County Unclassifiable/Attainment
Morrow County Unclassifiable/Attainment
Muskingum County Unclassifiable/Attainment
Noble County Unclassifiable/Attainment
Ottawa County Unclassifiable/Attainment
Paulding County Unclassifiable/Attainment
Perry County Unclassifiable/Attainment
Pickaway County Unclassifiable/Attainment
Pike County Unclassifiable/Attainment
Preble County Unclassifiable/Attainment
Putnam County Unclassifiable/Attainment
Richland County Unclassifiable/Attainment
Ross County Unclassifiable/Attainment
Sandusky County Unclassifiable/Attainment
Scioto County Unclassifiable/Attainment
Seneca County Unclassifiable/Attainment
Shelby County Unclassifiable/Attainment
Tuscarawas County Unclassifiable/Attainment
Union County Unclassifiable/Attainment
Van Wert County Unclassifiable/Attainment
Vinton County Unclassifiable/Attainment
Wayne County Unclassifiable/Attainment
Williams County Unclassifiable/Attainment
Wyandot County Unclassifiable/Attainment

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is June 15, 2004, unless otherwise noted.

Ohio—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Open Table
Designated area Designation Classification
Date1 Type Date1 Type
Cincinnati, OH-KY-IN:2 12/16/16 Attainment
Butler County
Clermont County
Clinton County
Hamilton County
Warren County
Cleveland, OH:2 Ashtabula County, Cuyahoga County, Geauga County, Lake County, Lorain County, Medina County, Portage County, Summit County 1/6/17 Attainment
Columbus, OH:2 Delaware County, Fairfield County, Franklin County, Knox County, Licking County, Madison County 12/21/16 Attainment
Rest of State:3 Unclassifiable/Attainment

1This date is July 20, 2012, unless otherwise noted.

2Excludes Indian country located in each area, unless otherwise noted.

3Includes any Indian country in each county or area, unless otherwise specified.

4Attainment date is extended to July 20, 2016.

Ohio—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Open Table
Designated area1 Designation Classification
Date2 Type Date2 Type
Cincinnati, OH-KY Nonattainment Marginal.
Butler County.
Clermont County.
Hamilton County.
Warren County.
Cleveland, OH Nonattainment Marginal.
Cuyahoga County.
Geauga County.
Lake County.
Lorain County.
Medina County.
Portage County.
Summit County.
Columbus, OH: 8/21/19 Attainment
Delaware County
Fairfield County
Franklin County
Licking County
Adams County 1/16/18 Attainment/Unclassifiable
Allen County 1/16/18 Attainment/Unclassifiable
Ashland County 1/16/18 Attainment/Unclassifiable
Ashtabula County Attainment/Unclassifiable
Athens County 1/16/18 Attainment/Unclassifiable
Auglaize County 1/16/18 Attainment/Unclassifiable
Belmont County 1/16/18 Attainment/Unclassifiable
Brown County Attainment/Unclassifiable
Carroll County Attainment/Unclassifiable
Champaign County 1/16/18 Attainment/Unclassifiable
Clark County 1/16/18 Attainment/Unclassifiable
Clinton County Attainment/Unclassifiable
Columbiana County 1/16/18 Attainment/Unclassifiable
Coshocton County 1/16/18 Attainment/Unclassifiable
Crawford County 1/16/18 Attainment/Unclassifiable
Darke County 1/16/18 Attainment/Unclassifiable
Defiance County 1/16/18 Attainment/Unclassifiable
Erie County Attainment/Unclassifiable
Fayette County Attainment/Unclassifiable
Fulton County 1/16/18 Attainment/Unclassifiable
Gallia County 1/16/18 Attainment/Unclassifiable
Greene County Attainment/Unclassifiable
Guernsey County Attainment/Unclassifiable
Hancock County 1/16/18 Attainment/Unclassifiable
Hardin County 1/16/18 Attainment/Unclassifiable
Harrison County 1/16/18 Attainment/Unclassifiable
Henry County 1/16/18 Attainment/Unclassifiable
Highland County 1/16/18 Attainment/Unclassifiable
Hocking County Attainment/Unclassifiable
Holmes County 1/16/18 Attainment/Unclassifiable
Huron County Attainment/Unclassifiable
Jackson County 1/16/18 Attainment/Unclassifiable
Jefferson County 1/16/18 Attainment/Unclassifiable
Knox County Attainment/Unclassifiable
Lawrence County 1/16/18 Attainment/Unclassifiable
Logan County Attainment/Unclassifiable
Lucas County 1/16/18 Attainment/Unclassifiable
Madison County Attainment/Unclassifiable
Mahoning County 1/16/18 Attainment/Unclassifiable
Marion County Attainment/Unclassifiable
Meigs County 1/16/18 Attainment/Unclassifiable
Mercer County 1/16/18 Attainment/Unclassifiable
Miami County 1/16/18 Attainment/Unclassifiable
Monroe County 1/16/18 Attainment/Unclassifiable
Montgomery County Attainment/Unclassifiable
Morgan County 1/16/18 Attainment/Unclassifiable
Morrow County Attainment/Unclassifiable
Muskingum County Attainment/Unclassifiable
Noble County 1/16/18 Attainment/Unclassifiable
Ottawa County 1/16/18 Attainment/Unclassifiable
Paulding County 1/16/18 Attainment/Unclassifiable
Perry County Attainment/Unclassifiable
Pickaway County Attainment/Unclassifiable
Pike County 1/16/18 Attainment/Unclassifiable
Preble County Attainment/Unclassifiable
Putnam County 1/16/18 Attainment/Unclassifiable
Richland County 1/16/18 Attainment/Unclassifiable
Ross County Attainment/Unclassifiable
Sandusky County 1/16/18 Attainment/Unclassifiable
Scioto County 1/16/18 Attainment/Unclassifiable
Seneca County 1/16/18 Attainment/Unclassifiable
Shelby County 1/16/18 Attainment/Unclassifiable
Stark County Attainment/Unclassifiable
Trumbull County Attainment/Unclassifiable
Tuscarawas County Attainment/Unclassifiable
Union County Attainment/Unclassifiable
Van Wert County 1/16/18 Attainment/Unclassifiable
Vinton County 1/16/18 Attainment/Unclassifiable
Washington County 1/16/18 Attainment/Unclassifiable
Wayne County 1/16/18 Attainment/Unclassifiable
Williams County 1/16/18 Attainment/Unclassifiable
Wood County 1/16/18 Attainment/Unclassifiable
Wyandot County 1/16/18 Attainment/Unclassifiable

1Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.

2This date is August 3, 2018, unless otherwise noted.

Ohio—1978 Lead NAAQS

Open Table
Designated area Designation Classification
Date Type Date Type
Cuyahoga County (part)
Subcounty area in the vicinity of Master Metals 1/6/92 Unclassifiable
On the west by Interstate 71, on the north by the Conrail tracks, on the east by Interstate 77, and on the south by a line running from the intersection of Interstate 71 and Clark Avenue to the intersection of Interstate 77 and Pershing Avenue
Rest of State Not Designated

Ohio—2008 Lead NAAQS

Open Table
Designated area Designation for the 2008 NAAQSa
Date1 Type
Bellefontaine, OH:
Logan County (part) 7/28/2014 Attainment.
The portions of Logan County that are bounded by: Sections 27, 28, 33, and 34 of Lake Township
Cleveland, OH:
Cuyahoga County (part) 5/31/2017 Attainment.
The portions of Cuyahoga County that are bounded on the west by Washington Park Blvd./Crete Ave./East 49th St., on the east by East 71st St., on the north by Fleet Ave., and on the south by Grant Ave
Delta, OH: 3/13/2018 Attainment.
Fulton County (part)
The portions of Fulton County that are bounded by: sections 12 and 13 of York Township and sections 7 and 18 of Swan Creek Township
Rest of State Unclassifiable/Attainment.

aIncludes Indian Country located in each county or area, except as otherwise specified.

1December 31, 2011 unless otherwise noted.

[43 FR 46011, Oct. 5, 1978]


Tried the LawStack mobile app?

Join thousands and try LawStack mobile for FREE today.

  • Carry the law offline, wherever you go.
  • Download CFR, USC, rules, and state law to your mobile device.