40 CFR 81.336: Ohio.

Ohio—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

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]

Designated area 1 Designation

Date 2 Type

Campbell-Clermont Counties, KY-OH 11/21/2016 Attainment.

Clermont County (part)

Pierce Township

Lake County, OH 5/14/2019 Attainment.

Lake County

Muskingum River, OH 4/2/2026 Attainment.

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 9/12/2016 Unclassifiable.

Gallia County

Meigs County (part)

Bedford, Columbia, Rutland, Salem, Salisbury, and Scipio Townships

Clermont County, Ohio 2 9/12/2016 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.

1 Includes 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.

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

Ohio—Carbon Monoxide

Designated Area Designation Classification

Date 1 Type Date 1 Type

Cleveland Area

Cuyahoga County 3/7/1994 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 County 2 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

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

2 The 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

Designated area Designation Classification

Date 1 Type Date 1 Type

Canton Area:

Stark County Attainment

Cincinnati-Hamilton Area: 6/14/2005 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

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

3 The 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

Designated Area Designation Classification

Date Type Date Type

Cuyahoga County 1/10/2001 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 1/10/2001 Attainment

Rest of State 11/15/1990 Unclassifiable

Ohio—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 Type Date Type

Canton-Massillon, OH:

Stark County 10/22/2013 Attainment

Cincinnati-Hamilton, Ohio: 4/7/2017 Attainment.

Butler County

Clermont County

Hamilton County

Warren County

Cleveland-Akron-Lorain, OH 9/18/2013 Attainment

Ashtabula County (part)

Ashtabula Township

Cuyahoga County

Lake County

Lorain County

Medina County

Portage County

Summit County

Columbus, OH 11/7/2013 Attainment

Coshocton County (part)

Franklin Township

Delaware County

Fairfield County

Franklin County

Licking County

Dayton-Springfield, OH 9/26/2013 Attainment

Clark County

Greene County

Montgomery County

Huntington-Ashland, OH 12/31/2012 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 8/29/2013 Attainment

Steubenville-Weirton, OH-WV:

Jefferson County 9/18/2013 Attainment

Toledo, OH:

Lucas County Unclassifiable/Attainment

Wood County Unclassifiable/Attainment

Wheeling, WV-OH:

Belmont County 8/29/2013 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

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

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

Ohio—2012 Annual PM 2.5 NAAQS

[Primary]

Designated area 1 Designation Classification

Date 2 Type Date 2 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

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

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

Ohio—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Type Date 1 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

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

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

Ohio—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 Type Date Type

Canton-Massillon, OH:

Stark County 10/22/2013 Attainment.

Cleveland-Akron-Lorain, OH 9/18/2013 Attainment.

Cuyahoga County

Lake County

Lorain County

Medina County

Portage County

Summit County

Steubenville-Weirton, OH-WV:

Jefferson County 9/18/2013 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

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

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

Ohio—NO2 (1971 Annual Standard)

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)

Designated area Designation a

Date 1 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.

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

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

Ohio—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification

Date 1 Type Date 1 Type

Canton-Massillon, OH: Stark County 6/15/2007 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 9/15/2009 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 6/15/2007 Attainment.

Parkersburg-Marietta, WV-OH: Washington County 6/15/2007 Attainment.

Steubenville-Weirton, OH-WV: Jefferson County 6/15/2007 Attainment.

Toledo Area:

Lucas County 08/09/2007 Attainment.

Wood County 08/09/2007 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

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

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

Ohio—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification

Date 1 Type Date 1 Type

Cincinnati, OH-KY-IN: 2 12/16/2016 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 1/6/2017 Attainment

Columbus, OH: 2 Delaware County, Fairfield County, Franklin County, Knox County, Licking County, Madison County 12/21/2016 Attainment

Rest of State: 3 Unclassifiable/Attainment

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

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

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

4 Attainment date is extended to July 20, 2016.

Ohio—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification

Date 2 Type Date 2 Type

Cincinnati, OH-KY June 9, 2022 Attainment Marginal.

Butler County.

Clermont County.

Hamilton County.

Warren County.

Cleveland, OH: 6/29/2026 Attainment 1/16/2025 Serious.

Cuyahoga County.

Geauga County.

Lake County.

Lorain County.

Medina County.

Portage County.

Summit County.

Columbus, OH: 8/21/2019 Attainment

Delaware County

Fairfield County

Franklin County

Licking County

Adams County 1/16/2018 Attainment/Unclassifiable

Allen County 1/16/2018 Attainment/Unclassifiable

Ashland County 1/16/2018 Attainment/Unclassifiable

Ashtabula County Attainment/Unclassifiable

Athens County 1/16/2018 Attainment/Unclassifiable

Auglaize County 1/16/2018 Attainment/Unclassifiable

Belmont County 1/16/2018 Attainment/Unclassifiable

Brown County Attainment/Unclassifiable

Carroll County Attainment/Unclassifiable

Champaign County 1/16/2018 Attainment/Unclassifiable

Clark County 1/16/2018 Attainment/Unclassifiable

Clinton County Attainment/Unclassifiable

Columbiana County 1/16/2018 Attainment/Unclassifiable

Coshocton County 1/16/2018 Attainment/Unclassifiable

Crawford County 1/16/2018 Attainment/Unclassifiable

Darke County 1/16/2018 Attainment/Unclassifiable

Defiance County 1/16/2018 Attainment/Unclassifiable

Erie County Attainment/Unclassifiable

Fayette County Attainment/Unclassifiable

Fulton County 1/16/2018 Attainment/Unclassifiable

Gallia County 1/16/2018 Attainment/Unclassifiable

Greene County Attainment/Unclassifiable

Guernsey County Attainment/Unclassifiable

Hancock County 1/16/2018 Attainment/Unclassifiable

Hardin County 1/16/2018 Attainment/Unclassifiable

Harrison County 1/16/2018 Attainment/Unclassifiable

Henry County 1/16/2018 Attainment/Unclassifiable

Highland County 1/16/2018 Attainment/Unclassifiable

Hocking County Attainment/Unclassifiable

Holmes County 1/16/2018 Attainment/Unclassifiable

Huron County Attainment/Unclassifiable

Jackson County 1/16/2018 Attainment/Unclassifiable

Jefferson County 1/16/2018 Attainment/Unclassifiable

Knox County Attainment/Unclassifiable

Lawrence County 1/16/2018 Attainment/Unclassifiable

Logan County Attainment/Unclassifiable

Lucas County 1/16/2018 Attainment/Unclassifiable

Madison County Attainment/Unclassifiable

Mahoning County 1/16/2018 Attainment/Unclassifiable

Marion County Attainment/Unclassifiable

Meigs County 1/16/2018 Attainment/Unclassifiable

Mercer County 1/16/2018 Attainment/Unclassifiable

Miami County 1/16/2018 Attainment/Unclassifiable

Monroe County 1/16/2018 Attainment/Unclassifiable

Montgomery County Attainment/Unclassifiable

Morgan County 1/16/2018 Attainment/Unclassifiable

Morrow County Attainment/Unclassifiable

Muskingum County Attainment/Unclassifiable

Noble County 1/16/2018 Attainment/Unclassifiable

Ottawa County 1/16/2018 Attainment/Unclassifiable

Paulding County 1/16/2018 Attainment/Unclassifiable

Perry County Attainment/Unclassifiable

Pickaway County Attainment/Unclassifiable

Pike County 1/16/2018 Attainment/Unclassifiable

Preble County Attainment/Unclassifiable

Putnam County 1/16/2018 Attainment/Unclassifiable

Richland County 1/16/2018 Attainment/Unclassifiable

Ross County Attainment/Unclassifiable

Sandusky County 1/16/2018 Attainment/Unclassifiable

Scioto County 1/16/2018 Attainment/Unclassifiable

Seneca County 1/16/2018 Attainment/Unclassifiable

Shelby County 1/16/2018 Attainment/Unclassifiable

Stark County Attainment/Unclassifiable

Trumbull County Attainment/Unclassifiable

Tuscarawas County Attainment/Unclassifiable

Union County Attainment/Unclassifiable

Van Wert County 1/16/2018 Attainment/Unclassifiable

Vinton County 1/16/2018 Attainment/Unclassifiable

Washington County 1/16/2018 Attainment/Unclassifiable

Wayne County 1/16/2018 Attainment/Unclassifiable

Williams County 1/16/2018 Attainment/Unclassifiable

Wood County 1/16/2018 Attainment/Unclassifiable

Wyandot County 1/16/2018 Attainment/Unclassifiable

1 Includes 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.

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

Ohio—1978 Lead NAAQS

Designated area Designation Classification

Date Type Date Type

Cuyahoga County (part)

Subcounty area in the vicinity of Master Metals 1/6/1992 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

Designated area Designation for the 2008 NAAQS a

Date 1 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

Canton-Stark County, OH: 7/16/2026 Attainment.

Stark County (part)

Attainment area is bounded by the following roadways:

North: State Route OH-153 (12th Street NE; Mahoning Road)

East: Broadway Avenue

South: State Route OH-172 (Tuscarawas Street E; Lincoln Street E)

West: State Route OH-43-Northbound (Cherry Avenue NE)

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.

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

1 December 31, 2011 unless otherwise noted.