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 Code of Federal Regulations (Last Updated: April 5, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter C - Air Programs
 Part 81 - Designation of Areas for Air Quality Planning Purposes
 Subpart C - Section 107 Attainment Status Designations

  § 81.336 - Ohio.  

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  • § 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 CountyX
    Clermont CountyX
    Columbiana CountyX
    Coshocton CountyX
    Cuyahoga CountyX
    The remainder of Cuyahoga CountyX
    Gallia CountyX
    Greene CountyX
    Hamilton CountyX
    Jefferson County:
    The Cities of Steubenville and Mingo Junction, Townships of Steubenville, Island Creek, Cross Creek, Knox and WellsX
    The remainder of Jefferson CountyX
    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 CountyX
    Lorain CountyX
    Lucas County: The area east of Route 23 and west of the eastern boundary of Oregon TownshipX
    The remainder of Lucas County:
    Mahoning CountyX
    Montgomery CountyX
    Morgan County:
    Center TownshipX
    The remainder of Morgan CountyX
    Summit CountyX
    Trumbull CountyX
    Washington County:
    Waterford TownshipX
    The remainder of Washington CountyX
    All other counties in the State of OhioX

    Ohio—2010 Sulfur Dioxide NAAQS

    [Primary]

    Designated area1 Designation
    Date2 Type
    Campbell-Clermont Counties, KY–OH11/21/16Attainment.
    Clermont County (part)
    Pierce Township
    Lake County, OH5/14/2019Attainment.
    Lake County
    Muskingum River, OH10/4/13Nonattainment.
    Morgan County (part)
    Center Township
    Washington County (part)
    Waterford Township
    Steubenville, OH-WVNovember 29, 2019Attainment.
    Jefferson County (part).
    Cross Creek Township, Steubenville Township, Warren Township, Wells Township, Steubenville City.
    Gallia County, OH9/12/16Unclassifiable.
    Gallia County
    Meigs County (part)
    Bedford, Columbia, Rutland, Salem, Salisbury, and Scipio Townships
    Clermont County, Ohio2 9/12/16Attainment/Unclassifiable.
    Clermont County (part)
    Clermont County excluding Pierce Township
    Adams CountyAttainment/Unclassifiable.
    Allen CountyAttainment/Unclassifiable.
    Ashland CountyAttainment/Unclassifiable.
    Ashtabula CountyAttainment/Unclassifiable.
    Athens CountyAttainment/Unclassifiable.
    Auglaize CountyAttainment/Unclassifiable.
    Belmont CountyAttainment/Unclassifiable.
    Brown CountyAttainment/Unclassifiable.
    Butler CountyAttainment/Unclassifiable
    Carroll CountyAttainment/Unclassifiable.
    Champaign CountyAttainment/Unclassifiable.
    Clark CountyAttainment/Unclassifiable.
    Clinton CountyAttainment/Unclassifiable.
    Columbiana CountyAttainment/Unclassifiable.
    Coshocton CountyAttainment/Unclassifiable.
    Crawford CountyAttainment/Unclassifiable.
    Cuyahoga CountyAttainment/Unclassifiable.
    Darke CountyAttainment/Unclassifiable.
    Defiance CountyAttainment/Unclassifiable.
    Delaware CountyAttainment/Unclassifiable.
    Erie CountyAttainment/Unclassifiable.
    Fairfield CountyAttainment/Unclassifiable.
    Fayette CountyAttainment/Unclassifiable.
    Franklin CountyAttainment/Unclassifiable.
    Fulton CountyAttainment/Unclassifiable.
    Geauga CountyAttainment/Unclassifiable.
    Greene CountyAttainment/Unclassifiable.
    Guernsey CountyAttainment/Unclassifiable.
    Hamilton CountyAttainment/Unclassifiable.
    Hancock CountyAttainment/Unclassifiable.
    Hardin CountyAttainment/Unclassifiable.
    Harrison CountyAttainment/Unclassifiable.
    Henry CountyAttainment/Unclassifiable.
    Highland CountyAttainment/Unclassifiable.
    Hocking CountyAttainment/Unclassifiable.
    Holmes CountyAttainment/Unclassifiable.
    Huron CountyAttainment/Unclassifiable.
    Jackson CountyAttainment/Unclassifiable.
    Jefferson County (part) (remainder)Attainment/Unclassifiable.
    Knox CountyAttainment/Unclassifiable.
    Lawrence CountyAttainment/Unclassifiable.
    Licking CountyAttainment/Unclassifiable.
    Logan CountyAttainment/Unclassifiable.
    Lorain CountyAttainment/Unclassifiable.
    Lucas CountyAttainment/Unclassifiable.
    Madison CountyAttainment/Unclassifiable.
    Mahoning CountyAttainment/Unclassifiable.
    Marion CountyAttainment/Unclassifiable.
    Medina CountyAttainment/Unclassifiable.
    Meigs County (part) (remainder)Attainment/Unclassifiable.
    Mercer CountyAttainment/Unclassifiable.
    Miami CountyAttainment/Unclassifiable.
    Monroe CountyAttainment/Unclassifiable.
    Montgomery CountyAttainment/Unclassifiable.
    Morgan County (part) (remainder)Attainment/Unclassifiable.
    Morrow CountyAttainment/Unclassifiable.
    Muskingum CountyAttainment/Unclassifiable.
    Noble CountyAttainment/Unclassifiable.
    Ottawa CountyAttainment/Unclassifiable.
    Paulding CountyAttainment/Unclassifiable.
    Perry CountyAttainment/Unclassifiable.
    Pickaway CountyAttainment/Unclassifiable.
    Pike CountyAttainment/Unclassifiable.
    Portage CountyAttainment/Unclassifiable.
    Preble CountyAttainment/Unclassifiable.
    Putnam CountyAttainment/Unclassifiable.
    Richland CountyAttainment/Unclassifiable.
    Ross CountyAttainment/Unclassifiable.
    Sandusky CountyAttainment/Unclassifiable.
    Scioto CountyAttainment/Unclassifiable.
    Seneca CountyAttainment/Unclassifiable.
    Shelby CountyAttainment/Unclassifiable.
    Stark CountyAttainment/Unclassifiable.
    Summit CountyAttainment/Unclassifiable.
    Trumbull CountyAttainment/Unclassifiable.
    Tuscarawas CountyAttainment/Unclassifiable.
    Union CountyAttainment/Unclassifiable.
    Van Wert CountyAttainment/Unclassifiable.
    Vinton CountyAttainment/Unclassifiable.
    Warren CountyAttainment/Unclassifiable.
    Washington County (part) (remainder)Attainment/Unclassifiable.
    Wayne CountyAttainment/Unclassifiable.
    Williams CountyAttainment/Unclassifiable.
    Wood CountyAttainment/Unclassifiable.
    Wyandot CountyAttainment/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
    Date1 Type Date1 Type
    Cleveland Area
    Cuyahoga County3/7/94Attainment
    Cincinnati
    Hamilton CountyUnclassifiable/Attainment
    Columbus
    Franklin CountyUnclassifiable/Attainment
    Adams CountyUnclassifiable/Attainment
    Allen CountyUnclassifiable/Attainment
    Ashland CountyUnclassifiable/Attainment
    Ashtabula CountyUnclassifiable/Attainment
    Athens CountyUnclassifiable/Attainment
    Auglaize CountyUnclassifiable/Attainment
    Belmont CountyUnclassifiable/Attainment
    Brown CountyUnclassifiable/Attainment
    Butler CountyUnclassifiable/Attainment
    Carroll CountyUnclassifiable/Attainment
    Champaign CountyUnclassifiable/Attainment
    Clark CountyUnclassifiable/Attainment
    Clermont CountyUnclassifiable/Attainment
    Clinton CountyUnclassifiable/Attainment
    Columbiana CountyUnclassifiable/Attainment
    Coshocton CountyUnclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Darke CountyUnclassifiable/Attainment
    Defiance CountyUnclassifiable/Attainment
    Delaware CountyUnclassifiable/Attainment
    Erie CountyUnclassifiable/Attainment
    Fairfield CountyUnclassifiable/Attainment
    Fayette CountyUnclassifiable/Attainment
    Fulton CountyUnclassifiable/Attainment
    Gallia CountyUnclassifiable/Attainment
    Geauga CountyUnclassifiable/Attainment
    Greene CountyUnclassifiable/Attainment
    Guernsey CountyUnclassifiable/Attainment
    Hancock CountyUnclassifiable/Attainment
    Hardin CountyUnclassifiable/Attainment
    Harrison CountyUnclassifiable/Attainment
    Henry CountyUnclassifiable/Attainment
    Highland CountyUnclassifiable/Attainment
    Hocking CountyUnclassifiable/Attainment
    Holmes CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Jefferson County2 Unclassifiable/Attainment
    Knox CountyUnclassifiable/Attainment
    Lake CountyUnclassifiable/Attainment
    Lawrence CountyUnclassifiable/Attainment
    Licking CountyUnclassifiable/Attainment
    Logan CountyUnclassifiable/Attainment
    Lorain CountyUnclassifiable/Attainment
    Lucas CountyUnclassifiable/Attainment
    Madison CountyUnclassifiable/Attainment
    Mahoning CountyUnclassifiable/Attainment
    Marion CountyUnclassifiable/Attainment
    Medina CountyUnclassifiable/Attainment
    Meigs CountyUnclassifiable/Attainment
    Mercer CountyUnclassifiable/Attainment
    Miami CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Montgomery CountyUnclassifiable/Attainment
    Morgan CountyUnclassifiable/Attainment
    Morrow CountyUnclassifiable/Attainment
    Muskingum CountyUnclassifiable/Attainment
    Noble CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Paulding CountyUnclassifiable/Attainment
    Perry CountyUnclassifiable/Attainment
    Pickaway CountyUnclassifiable/Attainment
    Pike CountyUnclassifiable/Attainment
    Portage CountyUnclassifiable/Attainment
    Preble CountyUnclassifiable/Attainment
    Putnam CountyUnclassifiable/Attainment
    Richland CountyUnclassifiable/Attainment
    Ross CountyUnclassifiable/Attainment
    Sandusky CountyUnclassifiable/Attainment
    Scioto CountyUnclassifiable/Attainment
    Seneca CountyUnclassifiable/Attainment
    Shelby CountyUnclassifiable/Attainment
    Stark CountyUnclassifiable/Attainment
    Summit CountyUnclassifiable/Attainment
    Trumbull CountyUnclassifiable/Attainment
    Tuscarawas CountyUnclassifiable/Attainment
    Union CountyUnclassifiable/Attainment
    Van Wert CountyUnclassifiable/Attainment
    Vinton CountyUnclassifiable/Attainment
    Warren CountyUnclassifiable/Attainment
    Washington CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Williams CountyUnclassifiable/Attainment
    Wood CountyUnclassifiable/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
    Date1 Type Date1 Type
    Canton Area:
    Stark CountyAttainment
    Cincinnati-Hamilton Area:6/14/05Attainment
    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 CountyAttainment
    Columbiana County Area:
    Columbiana CountyAttainment
    Columbus Area:
    Delaware CountyAttainment
    Franklin CountyAttainment
    Licking CountyAttainment
    Dayton-Springfield Area:
    Clark CountyAttainment
    Greene CountyAttainment
    Miami CountyAttainment
    Montgomery CountyAttainment
    Preble County Area:
    Preble CountyAttainment
    Steubenville Area:
    Jefferson CountyAttainment
    Toledo Area:
    Lucas CountyAttainment
    Wood CountyAttainment
    Youngstown-Warren-Sharon Area:
    Mahoning CountyAttainment
    Trumbull CountyAttainment
    Adams CountyUnclassifiable/Attainment
    Allen CountyUnclassifiable/Attainment
    Ashland CountyUnclassifiable/Attainment
    Athens CountyUnclassifiable/Attainment
    Auglaize CountyUnclassifiable/Attainment
    Belmont CountyUnclassifiable/Attainment
    Brown CountyUnclassifiable/Attainment
    Carroll CountyUnclassifiable/Attainment
    Champaign CountyUnclassifiable/Attainment
    Coshocton CountyUnclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Darke CountyUnclassifiable/Attainment
    Defiance CountyUnclassifiable/Attainment
    Erie CountyUnclassifiable/Attainment
    Fairfield CountyUnclassifiable/Attainment
    Fayette CountyUnclassifiable/Attainment
    Fulton CountyUnclassifiable/Attainment
    Gallia CountyUnclassifiable/Attainment
    Guernsey CountyUnclassifiable/Attainment
    Hancock CountyUnclassifiable/Attainment
    Hardin CountyUnclassifiable/Attainment
    Harrison CountyUnclassifiable/Attainment
    Henry CountyUnclassifiable/Attainment
    Highland CountyUnclassifiable/Attainment
    Hocking CountyUnclassifiable/Attainment
    Holmes CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Knox CountyUnclassifiable/Attainment
    Lawrence CountyUnclassifiable/Attainment
    Logan CountyUnclassifiable/Attainment
    Madison CountyUnclassifiable/Attainment
    Marion CountyUnclassifiable/Attainment
    Meigs CountyUnclassifiable/Attainment
    Mercer CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Morgan CountyUnclassifiable/Attainment
    Morrow CountyUnclassifiable/Attainment
    Muskingum CountyUnclassifiable/Attainment
    Noble CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Paulding CountyUnclassifiable/Attainment
    Perry CountyUnclassifiable/Attainment
    Pickaway CountyUnclassifiable/Attainment
    Pike CountyUnclassifiable/Attainment
    Putnam CountyUnclassifiable/Attainment
    Richland CountyUnclassifiable/Attainment
    Ross CountyUnclassifiable/Attainment
    Sandusky CountyUnclassifiable/Attainment
    Scioto CountyUnclassifiable/Attainment
    Seneca CountyUnclassifiable/Attainment
    Shelby CountyUnclassifiable/Attainment
    Tuscarawas CountyUnclassifiable/Attainment
    Union CountyUnclassifiable/Attainment
    Van Wert CountyUnclassifiable/Attainment
    Vinton CountyUnclassifiable/Attainment
    Washington CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Williams CountyUnclassifiable/Attainment
    Wyandot CountyUnclassifiable/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 County1/10/01Attainment
    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 Street1/10/01Attainment
    Rest of State11/15/90Unclassifiable

    Ohio—1997 Annual PM2.5 NAAQS

    [Primary and Secondary]

    Designated area Designationa Classification
    Date1 Type Date Type
    Canton-Massillon, OH:
    Stark County10/22/13Attainment
    Cincinnati-Hamilton, Ohio:4/7/17Attainment.
    Butler County
    Clermont County
    Hamilton County
    Warren County
    Cleveland-Akron-Lorain, OH9/18/13Attainment
    Ashtabula County (part)
    Ashtabula Township
    Cuyahoga County
    Lake County
    Lorain County
    Medina County
    Portage County
    Summit County
    Columbus, OH11/7/13Attainment
    Coshocton County (part)
    Franklin Township
    Delaware County
    Fairfield County
    Franklin County
    Licking County
    Dayton-Springfield, OH9/26/13Attainment
    Clark County
    Greene County
    Montgomery County
    Huntington-Ashland, OH12/31/12Attainment
    Adams County (part)
    Monroe Township
    Sprigg Township
    Gallia County (part)
    Addison Township
    Cheshire Township
    Lawrence County
    Scioto County
    Parkersburg-Marietta, WV–OH:
    Washington County8/29/13Attainment
    Steubenville-Weirton, OH–WV:
    Jefferson County9/18/13Attainment
    Toledo, OH:
    Lucas CountyUnclassifiable/Attainment
    Wood CountyUnclassifiable/Attainment
    Wheeling, WV–OH:
    Belmont County8/29/13Attainment
    Youngstown-Warren-Sharon, OH–PA:
    Columbiana CountyUnclassifiable/Attainment
    Mahoning CountyUnclassifiable/Attainment
    Trumbull CountyUnclassifiable/Attainment
    Rest of State:
    Adams County (remainder)Unclassifiable/Attainment
    Allen CountyUnclassifiable/Attainment
    Ashland CountyUnclassifiable/Attainment
    Ashtabula County (remainder)Unclassifiable/Attainment
    Athens CountyUnclassifiable/Attainment
    Auglaize CountyUnclassifiable/Attainment
    Brown CountyUnclassifiable/Attainment
    Carroll CountyUnclassifiable/Attainment
    Champaign CountyUnclassifiable/Attainment
    Clinton CountyUnclassifiable/Attainment
    Coshocton County (remainder)Unclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Darke CountyUnclassifiable/Attainment
    Defiance CountyUnclassifiable/Attainment
    Erie CountyUnclassifiable/Attainment
    Fayette CountyUnclassifiable/Attainment
    Fulton CountyUnclassifiable/Attainment
    Gallia County (remainder)Unclassifiable/Attainment
    Geauga CountyUnclassifiable/Attainment
    Guernsey CountyUnclassifiable/Attainment
    Hancock CountyUnclassifiable/Attainment
    Hardin CountyUnclassifiable/Attainment
    Harrison CountyUnclassifiable/Attainment
    Henry CountyUnclassifiable/Attainment
    Highland CountyUnclassifiable/Attainment
    Hocking CountyUnclassifiable/Attainment
    Holmes CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Knox CountyUnclassifiable/Attainment
    Logan CountyUnclassifiable/Attainment
    Madison CountyUnclassifiable/Attainment
    Marion CountyUnclassifiable/Attainment
    Meigs CountyUnclassifiable/Attainment
    Mercer CountyUnclassifiable/Attainment
    Miami CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Morgan CountyUnclassifiable/Attainment
    Morrow CountyUnclassifiable/Attainment
    Muskingum CountyUnclassifiable/Attainment
    Noble CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Paulding CountyUnclassifiable/Attainment
    Perry CountyUnclassifiable/Attainment
    Pickaway CountyUnclassifiable/Attainment
    Pike CountyUnclassifiable/Attainment
    Preble CountyUnclassifiable/Attainment
    Putnam CountyUnclassifiable/Attainment
    Richland CountyUnclassifiable/Attainment
    Ross CountyUnclassifiable/Attainment
    Sandusky CountyUnclassifiable/Attainment
    Seneca CountyUnclassifiable/Attainment
    Shelby CountyUnclassifiable/Attainment
    Tuscarawas CountyUnclassifiable/Attainment
    Union CountyUnclassifiable/Attainment
    Van Wert CountyUnclassifiable/Attainment
    Vinton CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Williams CountyUnclassifiable/Attainment
    Wyandot CountyUnclassifiable/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 PM2.5 NAAQS

    [Primary]

    Designated area1 Designation Classification
    Date2 Type Date2 Type
    Cleveland, OH:
    Cuyahoga County4/12/2019AttainmentModerate
    Lorain County4/12/2019AttainmentModerate
    Rest of State:
    Adams CountyUnclassifiable/Attainment
    Allen CountyUnclassifiable/Attainment
    Ashland CountyUnclassifiable/Attainment
    Ashtabula CountyUnclassifiable/Attainment
    Athens CountyUnclassifiable/Attainment
    Auglaize CountyUnclassifiable/Attainment
    Belmont CountyUnclassifiable/Attainment
    Brown CountyUnclassifiable/Attainment
    Butler CountyUnclassifiable/Attainment
    Carroll CountyUnclassifiable/Attainment
    Champaign CountyUnclassifiable/Attainment
    Clark CountyUnclassifiable/Attainment
    Clermont CountyUnclassifiable/Attainment
    Clinton CountyUnclassifiable/Attainment
    Columbiana CountyUnclassifiable/Attainment
    Coshocton CountyUnclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Darke CountyUnclassifiable/Attainment
    Defiance CountyUnclassifiable/Attainment
    Delaware CountyUnclassifiable/Attainment
    Erie CountyUnclassifiable/Attainment
    Fairfield CountyUnclassifiable/Attainment
    Fayette CountyUnclassifiable/Attainment
    Franklin CountyUnclassifiable/Attainment
    Fulton CountyUnclassifiable/Attainment
    Gallia CountyUnclassifiable/Attainment
    Geauga CountyUnclassifiable/Attainment
    Greene CountyUnclassifiable/Attainment
    Guernsey CountyUnclassifiable/Attainment
    Hamilton CountyUnclassifiable/Attainment
    Hancock CountyUnclassifiable/Attainment
    Hardin CountyUnclassifiable/Attainment
    Harrison CountyUnclassifiable/Attainment
    Henry CountyUnclassifiable/Attainment
    Highland CountyUnclassifiable/Attainment
    Hocking CountyUnclassifiable/Attainment
    Holmes CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Jefferson CountyUnclassifiable/Attainment
    Knox CountyUnclassifiable/Attainment
    Lake CountyUnclassifiable/Attainment
    Lawrence CountyUnclassifiable/Attainment
    Licking CountyUnclassifiable/Attainment
    Logan CountyUnclassifiable/Attainment
    Lucas CountyUnclassifiable/Attainment
    Madison CountyUnclassifiable/Attainment
    Mahoning CountyUnclassifiable/Attainment
    Marion CountyUnclassifiable/Attainment
    Medina CountyUnclassifiable/Attainment
    Meigs CountyUnclassifiable/Attainment
    Mercer CountyUnclassifiable/Attainment
    Miami CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Montgomery CountyUnclassifiable/Attainment
    Morgan CountyUnclassifiable/Attainment
    Morrow CountyUnclassifiable/Attainment
    Muskingum CountyUnclassifiable/Attainment
    Noble CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Paulding CountyUnclassifiable/Attainment
    Perry CountyUnclassifiable/Attainment
    Pickaway CountyUnclassifiable/Attainment
    Pike CountyUnclassifiable/Attainment
    Portage CountyUnclassifiable/Attainment
    Preble CountyUnclassifiable/Attainment
    Putnam CountyUnclassifiable/Attainment
    Richland CountyUnclassifiable/Attainment
    Ross CountyUnclassifiable/Attainment
    Sandusky CountyUnclassifiable/Attainment
    Scioto CountyUnclassifiable/Attainment
    Seneca CountyUnclassifiable/Attainment
    Shelby CountyUnclassifiable/Attainment
    Stark CountyUnclassifiable/Attainment
    Summit CountyUnclassifiable/Attainment
    Trumbull CountyUnclassifiable/Attainment
    Tuscarawas CountyUnclassifiable/Attainment
    Union CountyUnclassifiable/Attainment
    Van Wert CountyUnclassifiable/Attainment
    Vinton CountyUnclassifiable/Attainment
    Warren CountyUnclassifiable/Attainment
    Washington CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Williams CountyUnclassifiable/Attainment
    Wood CountyUnclassifiable/Attainment
    Wyandot CountyUnclassifiable/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 Designationa Classification
    Type Date1 Date Type
    Canton-Massillon, OH:
    Stark CountyUnclassifiable/Attainment
    Cleveland-Akron-Lorain, OH:Unclassifiable/Attainment
    Cuyahoga County
    Lake County
    Lorain County
    Medina County
    Portage County
    Summit County
    Steubenville-Weirton, OH–WV:
    Jefferson CountyUnclassifiable/Attainment
    Rest of State:
    Adams CountyUnclassifiable/Attainment
    Allen CountyUnclassifiable/Attainment
    Ashland CountyUnclassifiable/Attainment
    Ashtabula CountyUnclassifiable/Attainment
    Athens CountyUnclassifiable/Attainment
    Auglaize CountyUnclassifiable/Attainment
    Belmont CountyUnclassifiable/Attainment
    Brown CountyUnclassifiable/Attainment
    Butler CountyUnclassifiable/Attainment
    Carroll CountyUnclassifiable/Attainment
    Champaign CountyUnclassifiable/Attainment
    Clark CountyUnclassifiable/Attainment
    Clermont CountyUnclassifiable/Attainment
    Clinton CountyUnclassifiable/Attainment
    Columbiana CountyUnclassifiable/Attainment
    Coshocton CountyUnclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Darke CountyUnclassifiable/Attainment
    Defiance CountyUnclassifiable/Attainment
    Delaware CountyUnclassifiable/Attainment
    Erie CountyUnclassifiable/Attainment
    Fairfield CountyUnclassifiable/Attainment
    Fayette CountyUnclassifiable/Attainment
    Franklin CountyUnclassifiable/Attainment
    Fulton CountyUnclassifiable/Attainment
    Gallia CountyUnclassifiable/Attainment
    Geauga CountyUnclassifiable/Attainment
    Greene CountyUnclassifiable/Attainment
    Guernsey CountyUnclassifiable/Attainment
    Hamilton CountyUnclassifiable/Attainment
    Hancock CountyUnclassifiable/Attainment
    Hardin CountyUnclassifiable/Attainment
    Harrison CountyUnclassifiable/Attainment
    Henry CountyUnclassifiable/Attainment
    Highland CountyUnclassifiable/Attainment
    Hocking CountyUnclassifiable/Attainment
    Holmes CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Knox CountyUnclassifiable/Attainment
    Lawrence CountyUnclassifiable/Attainment
    Licking CountyUnclassifiable/Attainment
    Logan CountyUnclassifiable/Attainment
    Lucas CountyUnclassifiable/Attainment
    Madison CountyUnclassifiable/Attainment
    Mahoning CountyUnclassifiable/Attainment
    Marion CountyUnclassifiable/Attainment
    Meigs CountyUnclassifiable/Attainment
    Mercer CountyUnclassifiable/Attainment
    Miami CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Montgomery CountyUnclassifiable/Attainment
    Morgan CountyUnclassifiable/Attainment
    Morrow CountyUnclassifiable/Attainment
    Muskingum CountyUnclassifiable/Attainment
    Noble CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Paulding CountyUnclassifiable/Attainment
    Perry CountyUnclassifiable/Attainment
    Pickaway CountyUnclassifiable/Attainment
    Pike CountyUnclassifiable/Attainment
    Preble CountyUnclassifiable/Attainment
    Putnam CountyUnclassifiable/Attainment
    Richland CountyUnclassifiable/Attainment
    Ross CountyUnclassifiable/Attainment
    Sandusky CountyUnclassifiable/Attainment
    Scioto CountyUnclassifiable/Attainment
    Seneca CountyUnclassifiable/Attainment
    Shelby CountyUnclassifiable/Attainment
    Trumbull CountyUnclassifiable/Attainment
    Tuscarawas CountyUnclassifiable/Attainment
    Union CountyUnclassifiable/Attainment
    Van Wert CountyUnclassifiable/Attainment
    Vinton CountyUnclassifiable/Attainment
    Warren CountyUnclassifiable/Attainment
    Washington CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Williams CountyUnclassifiable/Attainment
    Wood CountyUnclassifiable/Attainment
    Wyandot CountyUnclassifiable/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 Designationa Classification
    Date1 Type Date Type
    Canton-Massillon, OH:
    Stark County10/22/13Attainment.
    Cleveland-Akron-Lorain, OH9/18/13Attainment.
    Cuyahoga County
    Lake County
    Lorain County
    Medina County
    Portage County
    Summit County
    Steubenville-Weirton, OH–WV:
    Jefferson County9/18/13Attainment.
    Rest of State:
    Adams CountyUnclassifiable/Attainment
    Allen CountyUnclassifiable/Attainment
    Ashland CountyUnclassifiable/Attainment
    Ashtabula CountyUnclassifiable/Attainment
    Athens CountyUnclassifiable/Attainment
    Auglaize CountyUnclassifiable/Attainment
    Belmont CountyUnclassifiable/Attainment
    Brown CountyUnclassifiable/Attainment
    Butler CountyUnclassifiable/Attainment
    Carroll CountyUnclassifiable/Attainment
    Champaign CountyUnclassifiable/Attainment
    Clark CountyUnclassifiable/Attainment
    Clermont CountyUnclassifiable/Attainment
    Clinton CountyUnclassifiable/Attainment
    Columbiana CountyUnclassifiable/Attainment
    Coshocton CountyUnclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Darke CountyUnclassifiable/Attainment
    Defiance CountyUnclassifiable/Attainment
    Delaware CountyUnclassifiable/Attainment
    Erie CountyUnclassifiable/Attainment
    Fairfield CountyUnclassifiable/Attainment
    Fayette CountyUnclassifiable/Attainment
    Franklin CountyUnclassifiable/Attainment
    Fulton CountyUnclassifiable/Attainment
    Gallia CountyUnclassifiable/Attainment
    Geauga CountyUnclassifiable/Attainment
    Greene CountyUnclassifiable/Attainment
    Guernsey CountyUnclassifiable/Attainment
    Hamilton CountyUnclassifiable/Attainment
    Hancock CountyUnclassifiable/Attainment
    Hardin CountyUnclassifiable/Attainment
    Harrison CountyUnclassifiable/Attainment
    Henry CountyUnclassifiable/Attainment
    Highland CountyUnclassifiable/Attainment
    Hocking CountyUnclassifiable/Attainment
    Holmes CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Knox CountyUnclassifiable/Attainment
    Lawrence CountyUnclassifiable/Attainment
    Licking CountyUnclassifiable/Attainment
    Logan CountyUnclassifiable/Attainment
    Lucas CountyUnclassifiable/Attainment
    Madison CountyUnclassifiable/Attainment
    Mahoning CountyUnclassifiable/Attainment
    Marion CountyUnclassifiable/Attainment
    Meigs CountyUnclassifiable/Attainment
    Mercer CountyUnclassifiable/Attainment
    Miami CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Montgomery CountyUnclassifiable/Attainment
    Morgan CountyUnclassifiable/Attainment
    Morrow CountyUnclassifiable/Attainment
    Muskingum CountyUnclassifiable/Attainment
    Noble CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Paulding CountyUnclassifiable/Attainment
    Perry CountyUnclassifiable/Attainment
    Pickaway CountyUnclassifiable/Attainment
    Pike CountyUnclassifiable/Attainment
    Preble CountyUnclassifiable/Attainment
    Putnam CountyUnclassifiable/Attainment
    Richland CountyUnclassifiable/Attainment
    Ross CountyUnclassifiable/Attainment
    Sandusky CountyUnclassifiable/Attainment
    Scioto CountyUnclassifiable/Attainment
    Seneca CountyUnclassifiable/Attainment
    Shelby CountyUnclassifiable/Attainment
    Trumbull CountyUnclassifiable/Attainment
    Tuscarawas CountyUnclassifiable/Attainment
    Union CountyUnclassifiable/Attainment
    Van Wert CountyUnclassifiable/Attainment
    Vinton CountyUnclassifiable/Attainment
    Warren CountyUnclassifiable/Attainment
    Washington CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Williams CountyUnclassifiable/Attainment
    Wood CountyUnclassifiable/Attainment
    Wyandot CountyUnclassifiable/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 OhioX

    Ohio—NO2 (2010 1-Hour Standard)

    Designated area Designationa
    Date1 Type
    Adams CountyUnclassifiable/Attainment.
    Allen CountyUnclassifiable/Attainment.
    Ashland CountyUnclassifiable/Attainment.
    Ashtabula CountyUnclassifiable/Attainment.
    Athens CountyUnclassifiable/Attainment.
    Auglaize CountyUnclassifiable/Attainment.
    Belmont CountyUnclassifiable/Attainment.
    Brown CountyUnclassifiable/Attainment.
    Butler CountyUnclassifiable/Attainment.
    Carroll CountyUnclassifiable/Attainment.
    Champaign CountyUnclassifiable/Attainment.
    Clark CountyUnclassifiable/Attainment.
    Clermont CountyUnclassifiable/Attainment.
    Clinton CountyUnclassifiable/Attainment.
    Columbiana CountyUnclassifiable/Attainment.
    Coshocton CountyUnclassifiable/Attainment.
    Crawford CountyUnclassifiable/Attainment.
    Cuyahoga CountyUnclassifiable/Attainment.
    Darke CountyUnclassifiable/Attainment.
    Defiance CountyUnclassifiable/Attainment.
    Delaware CountyUnclassifiable/Attainment.
    Erie CountyUnclassifiable/Attainment.
    Fairfield CountyUnclassifiable/Attainment.
    Fayette CountyUnclassifiable/Attainment.
    Franklin CountyUnclassifiable/Attainment.
    Fulton CountyUnclassifiable/Attainment.
    Gallia CountyUnclassifiable/Attainment.
    Geauga CountyUnclassifiable/Attainment.
    Greene CountyUnclassifiable/Attainment.
    Guernsey CountyUnclassifiable/Attainment.
    Hamilton CountyUnclassifiable/Attainment.
    Hancock CountyUnclassifiable/Attainment.
    Hardin CountyUnclassifiable/Attainment.
    Harrison CountyUnclassifiable/Attainment.
    Henry CountyUnclassifiable/Attainment.
    Highland CountyUnclassifiable/Attainment.
    Hocking CountyUnclassifiable/Attainment.
    Holmes CountyUnclassifiable/Attainment.
    Huron CountyUnclassifiable/Attainment.
    Jackson CountyUnclassifiable/Attainment.
    Jefferson CountyUnclassifiable/Attainment.
    Knox CountyUnclassifiable/Attainment.
    Lake CountyUnclassifiable/Attainment.
    Lawrence CountyUnclassifiable/Attainment.
    Licking CountyUnclassifiable/Attainment.
    Logan CountyUnclassifiable/Attainment.
    Lorain CountyUnclassifiable/Attainment.
    Lucas CountyUnclassifiable/Attainment.
    Madison CountyUnclassifiable/Attainment.
    Mahoning CountyUnclassifiable/Attainment.
    Marion CountyUnclassifiable/Attainment.
    Medina CountyUnclassifiable/Attainment.
    Meigs CountyUnclassifiable/Attainment.
    Mercer CountyUnclassifiable/Attainment.
    Miami CountyUnclassifiable/Attainment.
    Monroe CountyUnclassifiable/Attainment.
    Montgomery CountyUnclassifiable/Attainment.
    Morgan CountyUnclassifiable/Attainment.
    Morrow CountyUnclassifiable/Attainment.
    Muskingum CountyUnclassifiable/Attainment.
    Noble CountyUnclassifiable/Attainment.
    Ottawa CountyUnclassifiable/Attainment.
    Paulding CountyUnclassifiable/Attainment.
    Perry CountyUnclassifiable/Attainment.
    Pickaway CountyUnclassifiable/Attainment.
    Pike CountyUnclassifiable/Attainment.
    Portage CountyUnclassifiable/Attainment.
    Preble CountyUnclassifiable/Attainment.
    Putnam CountyUnclassifiable/Attainment.
    Richland CountyUnclassifiable/Attainment.
    Ross CountyUnclassifiable/Attainment.
    Sandusky CountyUnclassifiable/Attainment.
    Scioto CountyUnclassifiable/Attainment.
    Seneca CountyUnclassifiable/Attainment.
    Shelby CountyUnclassifiable/Attainment.
    Stark CountyUnclassifiable/Attainment.
    Summit CountyUnclassifiable/Attainment.
    Trumbull CountyUnclassifiable/Attainment.
    Tuscarawas CountyUnclassifiable/Attainment.
    Union CountyUnclassifiable/Attainment.
    Van Wert CountyUnclassifiable/Attainment.
    Vinton CountyUnclassifiable/Attainment.
    Warren CountyUnclassifiable/Attainment.
    Washington CountyUnclassifiable/Attainment.
    Wayne CountyUnclassifiable/Attainment.
    Williams CountyUnclassifiable/Attainment.
    Wood CountyUnclassifiable/Attainment.
    Wyandot CountyUnclassifiable/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 Designationa Category/classification
    Date1 Type Date1 Type
    Canton-Massillon, OH: Stark County6/15/07Attainment.
    Cincinnati–Hamilton, OH–KY–IN:
    Butler CountyMay 11, 2010Attainment
    Clermont County
    Clinton County
    Hamilton County
    Warren County
    Cleveland-Akron-Lorain, OH:
    Ashtabula County
    Cuyahoga County9/15/2009Attainment.
    Geauga County
    Lake County
    Lorain County
    Medina County
    Portage County
    Summit County
    Columbus, OH:
    Delaware County9/15/09Attainment
    Fairfield County
    Franklin County
    Knox County
    Licking County
    Madison County
    Dayton-Springfield, OH:
    Clark CountyAugust 13, 2007Attainment.
    Greene County.
    Miami County.
    Montgomery County.
    Lima, OH: Allen County6/15/07Attainment.
    Parkersburg-Marietta, WV-OH: Washington County6/15/07Attainment.
    Steubenville-Weirton, OH-WV: Jefferson County6/15/07Attainment.
    Toledo Area:
    Lucas County08/09/07Attainment.
    Wood County08/09/07Attainment.
    Wheeling, WV–OH: Belmont County6/15/2007Attainment.
    Youngstown-Warren-Sharon, PA-OH:June 12, 2007
    Columbiana CountyAttainment
    Mahoning CountyAttainment
    Trumbull CountyAttainment
    Rest of State:
    Adams CountyUnclassifiable/Attainment
    Ashland CountyUnclassifiable/Attainment
    Athens County
    Auglaize CountyUnclassifiable/Attainment
    Brown CountyUnclassifiable/Attainment
    Carroll CountyUnclassifiable/Attainment
    Champaign CountyUnclassifiable/Attainment
    Coshocton CountyUnclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Darke CountyUnclassifiable/Attainment
    Defiance CountyUnclassifiable/Attainment
    Erie CountyUnclassifiable/Attainment
    Fayette CountyUnclassifiable/Attainment
    Fulton CountyUnclassifiable/Attainment
    Gallia CountyUnclassifiable/Attainment
    Guernsey CountyUnclassifiable/Attainment
    Hancock CountyUnclassifiable/Attainment
    Hardin CountyUnclassifiable/Attainment
    Harrison CountyUnclassifiable/Attainment
    Henry CountyUnclassifiable/Attainment
    Highland CountyUnclassifiable/Attainment
    Hocking CountyUnclassifiable/Attainment
    Holmes CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Lawrence CountyUnclassifiable/Attainment
    Logan CountyUnclassifiable/Attainment
    Marion CountyUnclassifiable/Attainment
    Meigs CountyUnclassifiable/Attainment
    Mercer CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Morgan CountyUnclassifiable/Attainment
    Morrow CountyUnclassifiable/Attainment
    Muskingum CountyUnclassifiable/Attainment
    Noble CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Paulding CountyUnclassifiable/Attainment
    Perry CountyUnclassifiable/Attainment
    Pickaway CountyUnclassifiable/Attainment
    Pike CountyUnclassifiable/Attainment
    Preble CountyUnclassifiable/Attainment
    Putnam CountyUnclassifiable/Attainment
    Richland CountyUnclassifiable/Attainment
    Ross CountyUnclassifiable/Attainment
    Sandusky CountyUnclassifiable/Attainment
    Scioto CountyUnclassifiable/Attainment
    Seneca CountyUnclassifiable/Attainment
    Shelby CountyUnclassifiable/Attainment
    Tuscarawas CountyUnclassifiable/Attainment
    Union CountyUnclassifiable/Attainment
    Van Wert CountyUnclassifiable/Attainment
    Vinton CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Williams CountyUnclassifiable/Attainment
    Wyandot CountyUnclassifiable/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
    Date1 Type Date1 Type
    Cincinnati, OH-KY-IN:2 12/16/16Attainment
    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 County1/6/17Attainment
    Columbus, OH:2 Delaware County, Fairfield County, Franklin County, Knox County, Licking County, Madison County12/21/16Attainment
    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 area1 Designation Classification
    Date2 Type Date2 Type
    Cincinnati, OH-KYJune 9, 2022AttainmentMarginal.
    Butler County.
    Clermont County.
    Hamilton County.
    Warren County.
    Cleveland, OHNonattainmentNovember 7, 202211/7/22Moderate.
    Cuyahoga County.
    Geauga County.
    Lake County.
    Lorain County.
    Medina County.
    Portage County.
    Summit County.
    Columbus, OH:8/21/19Attainment
    Delaware County
    Fairfield County
    Franklin County
    Licking County
    Adams County1/16/18Attainment/Unclassifiable
    Allen County1/16/18Attainment/Unclassifiable
    Ashland County1/16/18Attainment/Unclassifiable
    Ashtabula CountyAttainment/Unclassifiable
    Athens County1/16/18Attainment/Unclassifiable
    Auglaize County1/16/18Attainment/Unclassifiable
    Belmont County1/16/18Attainment/Unclassifiable
    Brown CountyAttainment/Unclassifiable
    Carroll CountyAttainment/Unclassifiable
    Champaign County1/16/18Attainment/Unclassifiable
    Clark County1/16/18Attainment/Unclassifiable
    Clinton CountyAttainment/Unclassifiable
    Columbiana County1/16/18Attainment/Unclassifiable
    Coshocton County1/16/18Attainment/Unclassifiable
    Crawford County1/16/18Attainment/Unclassifiable
    Darke County1/16/18Attainment/Unclassifiable
    Defiance County1/16/18Attainment/Unclassifiable
    Erie CountyAttainment/Unclassifiable
    Fayette CountyAttainment/Unclassifiable
    Fulton County1/16/18Attainment/Unclassifiable
    Gallia County1/16/18Attainment/Unclassifiable
    Greene CountyAttainment/Unclassifiable
    Guernsey CountyAttainment/Unclassifiable
    Hancock County1/16/18Attainment/Unclassifiable
    Hardin County1/16/18Attainment/Unclassifiable
    Harrison County1/16/18Attainment/Unclassifiable
    Henry County1/16/18Attainment/Unclassifiable
    Highland County1/16/18Attainment/Unclassifiable
    Hocking CountyAttainment/Unclassifiable
    Holmes County1/16/18Attainment/Unclassifiable
    Huron CountyAttainment/Unclassifiable
    Jackson County1/16/18Attainment/Unclassifiable
    Jefferson County1/16/18Attainment/Unclassifiable
    Knox CountyAttainment/Unclassifiable
    Lawrence County1/16/18Attainment/Unclassifiable
    Logan CountyAttainment/Unclassifiable
    Lucas County1/16/18Attainment/Unclassifiable
    Madison CountyAttainment/Unclassifiable
    Mahoning County1/16/18Attainment/Unclassifiable
    Marion CountyAttainment/Unclassifiable
    Meigs County1/16/18Attainment/Unclassifiable
    Mercer County1/16/18Attainment/Unclassifiable
    Miami County1/16/18Attainment/Unclassifiable
    Monroe County1/16/18Attainment/Unclassifiable
    Montgomery CountyAttainment/Unclassifiable
    Morgan County1/16/18Attainment/Unclassifiable
    Morrow CountyAttainment/Unclassifiable
    Muskingum CountyAttainment/Unclassifiable
    Noble County1/16/18Attainment/Unclassifiable
    Ottawa County1/16/18Attainment/Unclassifiable
    Paulding County1/16/18Attainment/Unclassifiable
    Perry CountyAttainment/Unclassifiable
    Pickaway CountyAttainment/Unclassifiable
    Pike County1/16/18Attainment/Unclassifiable
    Preble CountyAttainment/Unclassifiable
    Putnam County1/16/18Attainment/Unclassifiable
    Richland County1/16/18Attainment/Unclassifiable
    Ross CountyAttainment/Unclassifiable
    Sandusky County1/16/18Attainment/Unclassifiable
    Scioto County1/16/18Attainment/Unclassifiable
    Seneca County1/16/18Attainment/Unclassifiable
    Shelby County1/16/18Attainment/Unclassifiable
    Stark CountyAttainment/Unclassifiable
    Trumbull CountyAttainment/Unclassifiable
    Tuscarawas CountyAttainment/Unclassifiable
    Union CountyAttainment/Unclassifiable
    Van Wert County1/16/18Attainment/Unclassifiable
    Vinton County1/16/18Attainment/Unclassifiable
    Washington County1/16/18Attainment/Unclassifiable
    Wayne County1/16/18Attainment/Unclassifiable
    Williams County1/16/18Attainment/Unclassifiable
    Wood County1/16/18Attainment/Unclassifiable
    Wyandot County1/16/18Attainment/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 Metals1/6/92Unclassifiable
    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 NAAQSa
    Date1 Type
    Bellefontaine, OH:
    Logan County (part)7/28/2014Attainment.
    The portions of Logan County that are bounded by: Sections 27, 28, 33, and 34 of Lake Township
    Canton—Stark County, OH:April 10, 2023Nonattainment.
    Stark County (part)
    Nonattainment 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)5/31/2017Attainment.
    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:3/13/2018Attainment.
    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 StateUnclassifiable/Attainment.

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

    1 December 31, 2011 unless otherwise noted.

    [43 FR 46011, Oct. 5, 1978]

    Editorial Note

    Editorial Note:

    For Federal Register citations affecting § 81.336, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.