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 Code of Federal Regulations (Last Updated: May 6, 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

  § 81.323 - Michigan.  

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  • § 81.323 Michigan.

    Michigan—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
    AQCR 82 (Michigan portion)X
    AQCR 122
    1. Midland County, R2E, T13N, sections 1–6, R2E, T13N, sections 1–6, R2E, T14N, sections 7–36X
    AQCR 123X
    AQCR 124 (Michigan portion)X
    AQCR 125X
    AQCR 126X

    Michigan—2010 Sulfur Dioxide NAAQS

    [Primary]

    Designated area1 Designation
    Date2 Type
    Detroit, MI10/4/13Nonattainment.
    Wayne County (part)
    The area bounded on the east by the Michigan-Ontario border, on the south by the Wayne County-Monroe County border, on the west by Interstate 75 north to Southfield Road, Southfield Road to Interstate 94, and Interstate 94 north to Michigan Avenue, and on the north by Michigan Avenue to Woodward Avenue and a line on Woodward Avenue extended to the Michigan-Ontario border.
    St. Clair, MI9/12/16Nonattainment.
    St. Clair County (part)
    Area defined by the St. Clair River for the eastern boundary, an extension from the St. Clair River straight west to the intersection of State Highway M–29 and St. Clair River Drive, continuing west on State Highway M–29 to Church Road to Arnold Road to County Line Road for the southern boundary, County Line Road and the Macomb/St. Clair County boundary to Stoddard Road to Wales Ridge Road for the western boundary, and Alpine Road to Fitz Road to Smith Creek Road to Range Road to Huron Avenue, extending straight east from the intersection of Huron Road and River Road to the St. Clair River for the northern boundary.
    Bay County, MI9/12/16Attainment/Unclassifiable.
    Bay County
    Lansing, MI9/12/16Attainment/Unclassifiable.
    Eaton County
    Ingham County
    Marquette County, MI9/12/16Attainment/Unclassifiable.
    Marquette County
    Monroe County, MI9/12/16Attainment/Unclassifiable.
    Monroe County
    Ottawa County, MI9/12/16Attainment/Unclassifiable.
    Ottawa County
    Alcona CountyAttainment/Unclassifiable.
    Alger CountyAttainment/Unclassifiable.
    Allegan CountyAttainment/Unclassifiable.
    Alpena CountyAttainment/Unclassifiable.
    Antrim CountyAttainment/Unclassifiable.
    Arenac CountyAttainment/Unclassifiable.
    Baraga CountyAttainment/Unclassifiable.
    Barry CountyAttainment/Unclassifiable.
    Benzie CountyAttainment/Unclassifiable.
    Berrien CountyAttainment/Unclassifiable.
    Branch CountyAttainment/Unclassifiable.
    Calhoun CountyAttainment/Unclassifiable.
    Cass CountyAttainment/Unclassifiable.
    Charlevoix CountyAttainment/Unclassifiable.
    Cheboygan CountyAttainment/Unclassifiable.
    Chippewa CountyAttainment/Unclassifiable.
    Clare CountyAttainment/Unclassifiable.
    Clinton CountyAttainment/Unclassifiable.
    Crawford CountyAttainment/Unclassifiable.
    Delta CountyAttainment/Unclassifiable.
    Dickinson CountyAttainment/Unclassifiable.
    Emmet CountyAttainment/Unclassifiable.
    Genesee CountyAttainment/Unclassifiable.
    Gladwin CountyAttainment/Unclassifiable.
    Gogebic CountyAttainment/Unclassifiable.
    Grand Traverse CountyAttainment/Unclassifiable.
    Gratiot CountyAttainment/Unclassifiable.
    Hillsdale CountyAttainment/Unclassifiable.
    Houghton CountyAttainment/Unclassifiable.
    Huron CountyAttainment/Unclassifiable.
    Ionia CountyAttainment/Unclassifiable.
    Iosco CountyAttainment/Unclassifiable.
    Iron CountyAttainment/Unclassifiable.
    Isabella CountyAttainment/Unclassifiable.
    Jackson CountyAttainment/Unclassifiable.
    Kalamazoo CountyAttainment/Unclassifiable.
    Kalkaska CountyAttainment/Unclassifiable.
    Kent CountyAttainment/Unclassifiable.
    Keweenaw CountyAttainment/Unclassifiable.
    Lake CountyAttainment/Unclassifiable.
    Lapeer CountyAttainment/Unclassifiable.
    Leelanau CountyAttainment/Unclassifiable.
    Lenawee CountyAttainment/Unclassifiable.
    Livingston CountyAttainment/Unclassifiable.
    Luce CountyAttainment/Unclassifiable.
    Mackinac CountyAttainment/Unclassifiable.
    Macomb CountyAttainment/Unclassifiable.
    Manistee CountyAttainment/Unclassifiable.
    Mason CountyAttainment/Unclassifiable.
    Mecosta CountyAttainment/Unclassifiable.
    Menominee CountyAttainment/Unclassifiable.
    Midland CountyAttainment/Unclassifiable.
    Missaukee CountyAttainment/Unclassifiable.
    Montcalm CountyAttainment/Unclassifiable.
    Montmorency CountyAttainment/Unclassifiable.
    Muskegon CountyAttainment/Unclassifiable.
    Newaygo CountyAttainment/Unclassifiable.
    Oakland CountyAttainment/Unclassifiable.
    Oceana CountyAttainment/Unclassifiable.
    Ogemaw CountyAttainment/Unclassifiable.
    Ontonagon CountyAttainment/Unclassifiable.
    Osceola CountyAttainment/Unclassifiable.
    Oscoda CountyAttainment/Unclassifiable.
    Otsego CountyAttainment/Unclassifiable.
    Presque Isle CountyAttainment/Unclassifiable.
    Roscommon CountyAttainment/Unclassifiable.
    Saginaw CountyAttainment/Unclassifiable.
    St. Clair County (remainder)Attainment/Unclassifiable.
    St. Joseph CountyAttainment/Unclassifiable.
    Sanilac CountyAttainment/Unclassifiable.
    Schoolcraft CountyAttainment/Unclassifiable.
    Shiawassee CountyAttainment/Unclassifiable.
    Tuscola CountyAttainment/Unclassifiable.
    Van Buren CountyAttainment/Unclassifiable.
    Washtenaw CountyAttainment/Unclassifiable.
    Wayne County (remainder)Attainment/Unclassifiable.
    Wexford 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.

    Michigan—Carbon Monoxide

    Designated Area Designation Classification
    Date1 Type Date1 Type
    DETROIT AREA
    Areas included within the following (counter-clockwise): Lake St. Clair to 14 Mile Road to Kelly Road, N. to 15 Mile Road to Hayes Road, S. to 14 Mile Road to Clawson City Boundary, following N. Clawson City boundary to N. Royal Oak boundary to 13 Mile Road to Evergreen Road to southern Beverly Hills City boundary to southern Bingham Farms City boundary to southern Franklin Hills City boundary to Inkster Road, south to Pennsylvania Road extending east to the Detroit River. Macomb County (part)August 30, 1999Attainment
    Oakland County (part)August 30, 1999Attainment
    Wayne County (part)August 30, 1999Attainment
    AQCR 082 South Bend-Elkhart-Benton Harbor InterstateUnclassifiable/Attainment
    Berrien County
    Cass County
    Van Buren County
    AQCR 122 Central Michigan IntrastateUnclassifiable/Attainment
    Allegan County
    Arenac County
    Bay County
    Clare County
    Genesee County
    Gladwin County
    Gratiot County
    Huron County
    Ionia County
    Iosco County
    Isabella County
    Kent County
    Lake County
    Lapeer County
    Mason County
    Mecosta County
    Midland County
    Montcalm County
    Muskegon County
    Newaygo County
    Oceana County
    Ogemaw County
    Osceola County
    Ottawa County
    Roscommon County
    Saginaw County
    Sanilac County
    Shiawassee County
    Tuscola County
    AQCR 123 Metro Detroit-Port Huron Intrastate (Remainder of)Unclassifiable/Attainment
    Macomb County (part)
    Remainder of County
    Oakland County (part)
    Remainder of County
    St. Clair County
    Wayne County (part)
    Remainder of County
    AQCR 124 Metropolitan Toledo InterstateUnclassifiable/Attainment
    Monroe County
    AQCR 125 South Central Michigan IntrastateUnclassifiable/Attainment
    Barry County
    Branch County
    Calhoun County
    Clinton County
    Eaton County
    Hillsdale County
    Ingham County
    Jackson County
    Kalamazoo County
    Lenawee County
    Livingston County
    St. Joseph County
    Washtenaw County
    AQCR 126 Upper Michigan IntrastateUnclassifiable/Attainment
    Alcona County
    Alger County
    Alpena County
    Antrim County
    Baraga County
    Benzie County
    Charlevoix County
    Cheboygan County
    Chippewa County
    Crawford County
    Delta County
    Dickinson County
    Emmet County
    Gogebic County
    Grand Traverse County
    Houghton County
    Iron County
    Kalkaska County
    Keweenaw County
    Leelanau County
    Luce County
    Mackinac County
    Manistee County
    Marquette County
    Menominee County
    Missaukee County
    Montmorency County
    Ontonagon County
    Oscoda County
    Otsego County
    Presque Isle County
    Schoolcraft County
    Wexford County

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

    Michigan—Ozone (1-Hour Standard)4

    Designated area Designation Classification
    Date1 Type Date1 Type
    Allegan County Area:
    Allegan CountyJanuary 16, 2001Attainment
    Barry County Area:
    Barry CountyUnclassifiable/Attainment
    Battle Creek Area:
    Calhoun CountyUnclassifiable/Attainment
    Benton Harbor Area:
    Berrien CountyUnclassifiable/Attainment
    Branch County Area:
    Branch CountyUnclassifiable/Attainment
    Cass County Area:
    Cass CountyUnclassifiable/Attainment
    Detroit-Ann Arbor Area:
    Livingston CountyAttainment
    Macomb CountyAttainment
    Monroe CountyAttainment
    Oakland CountyAttainment
    St. Clair CountyAttainment
    Washtenaw CountyAttainment
    Wayne CountyAttainment
    Flint Area:
    Genesee CountyJanuary 16, 2001Attainment
    Grand Rapids Area:
    Kent CountyAttainment
    Ottawa CountyAttainment
    Gratiot County Area:
    Gratiot CountyUnclassifiable/Attainment
    Hillsdale County Area:
    Hillsdale CountyUnclassifiable/Attainment
    Huron County Area:
    Huron CountyUnclassifiable/Attainment
    Ionia County Area:
    Ionia CountyUnclassifiable/Attainment
    Jackson Area:
    Jackson CountyUnclassifiable/Attainment
    Kalamazoo Area:
    Kalamazoo CountyUnclassifiable/Attainment
    Lansing-East Lansing Area:
    Clinton CountyUnclassifiable/Attainment
    Eaton CountyUnclassifiable/Attainment
    Ingham CountyUnclassifiable/Attainment
    Lapeer County Area:
    Lapeer CountyUnclassifiable/Attainment
    Lenawee County Area:
    Lenawee CountyUnclassifiable/Attainment
    Montcalm Area:
    Montcalm CountyUnclassifiable/Attainment
    Muskegon Area:
    Muskegon CountyOctober 18, 2000Attainment
    Saginaw-Bay City-Midland Area:
    Bay CountyJanuary 16, 2001Attainment
    Midland CountyJanuary 16, 2001Attainment
    Saginaw CountyJanuary 16, 2001Attainment
    Sanilac County Area:
    Sanilac CountyUnclassifiable/Attainment
    Shiawassee County Area:
    Shiawassee CountyUnclassifiable/Attainment
    St. Joseph County Area:
    St. Joseph CountyUnclassifiable/Attainment
    Tuscola County Area:
    Tuscola CountyUnclassifiable/Attainment
    Van Buren County Area:
    Van Buren CountyUnclassifiable/Attainment
    AQCR 122 Central Michigan Intrastate (Remainder of):Unclassifiable/Attainment
    Arenac County
    Clare County
    Gladwin County
    Iosco County
    Isabella County
    Lake County
    Mason County
    Mecosta County
    Newaygo County
    Oceana County
    Ogemaw County
    Osceola County
    Roscommon County
    AQCR 126 Upper Michigan Intrastate (part) Marquette CountyUnclassifiable/Attainment
    AQCR 126 Upper Michigan Intrastate (Remainder of):Unclassifiable/Attainment
    Alcona County
    Alger County
    Alpena County
    Antrim County
    Baraga County
    Benzie County
    Charlevoix County
    Cheboygan County
    Chippewa County
    Crawford County
    Delta County
    Dickinson County
    Emmet County
    Gogebic County
    Grand Traverse County
    Houghton County
    Iron County
    Kalkaska County
    Keweenaw County
    Leelanau County
    Luce County
    Mackinac County
    Manistee County
    Menominee County
    Missaukee County
    Montmorency County
    Ontonagon County
    Oscoda County
    Otsego County
    Presque Isle County
    Schoolcraft County
    Wexford County

    1 This date is October 18, 2000, unless otherwise noted.

    2 An area designated as an ozone nonattainment area as of the date of enactment of the CAAA of the 1990 that did not violate the ozone NAAQS during the period of 1987–1989.

    3 This date is January 16, 2001.

    4 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Michigan. The Detroit-Ann Arbor, Flint, Grand Rapids, Muskegon, Allegan Co, and Saginaw-Bay City-Midland areas are maintenance areas for the 1-hour NAAQS for purposes of 40 CFR part 51 subpart X.

    Michigan—PM–10

    Designated Area Designation Classification
    Date Type Date Type
    Wayne County—The area bounded by Michigan Avenue from its intersection with I–75 west to I–94, I–94 southwest to Greenfield Road, Greenfield Road south to Schaefer Road, Schaefer Road south and east to Jefferson Avenue, Jefferson Avenue south (Biddle Avenue through the city of Wyandotte) to Sibley Avenue, Sibley Avenue west to Fort Street, Fort Street south to King Road, King Road east to Jefferson Avenue, Jefferson Avenue south to Helen Road, Helen Road east extended to Trenton Channel, Trenton Channel north to the Detroit River, the Detroit River north to the Ambassador Bridge, Ambassador Bridge to I–75, I–75 to Michigan Avenue10/4/96Attainment
    Rest of State11/15/90Unclassifiable

    Michigan—1997 Annual PM2.5 NAAQS

    [Primary and Secondary]

    Designated area Designationa Classification
    Date1 Type Date Type
    Detroit-Ann Arbor, MI:8/29/13Attainment..
    Livingston County
    Macomb County
    Monroe County
    Oakland County
    St. Clair County
    Washtenaw County
    Wayne County
    Rest of State:
    Alcona CountyUnclassifiable/Attainment.
    Alger CountyUnclassifiable/Attainment.
    Allegan CountyUnclassifiable/Attainment.
    Alpena CountyUnclassifiable/Attainment.
    Antrim CountyUnclassifiable/Attainment.
    Arenac CountyUnclassifiable/Attainment.
    Baraga CountyUnclassifiable/Attainment.
    Barry CountyUnclassifiable/Attainment.
    Bay CountyUnclassifiable/Attainment.
    Benzie CountyUnclassifiable/Attainment.
    Berrien CountyUnclassifiable/Attainment.
    Branch CountyUnclassifiable/Attainment.
    Calhoun CountyUnclassifiable/Attainment.
    Cass CountyUnclassifiable/Attainment.
    Charlevoix CountyUnclassifiable/Attainment.
    Cheboygan CountyUnclassifiable/Attainment.
    Chippewa CountyUnclassifiable/Attainment.
    Clare CountyUnclassifiable/Attainment.
    Clinton CountyUnclassifiable/Attainment.
    Crawford CountyUnclassifiable/Attainment.
    Delta CountyUnclassifiable/Attainment.
    Dickinson CountyUnclassifiable/Attainment.
    Eaton CountyUnclassifiable/Attainment.
    Emmet CountyUnclassifiable/Attainment.
    Genesee CountyUnclassifiable/Attainment.
    Gladwin CountyUnclassifiable/Attainment.
    Gogebic CountyUnclassifiable/Attainment.
    Grand Traverse CountyUnclassifiable/Attainment.
    Gratiot CountyUnclassifiable/Attainment.
    Hillsdale CountyUnclassifiable/Attainment.
    Houghton CountyUnclassifiable/Attainment.
    Huron CountyUnclassifiable/Attainment.
    Ingham CountyUnclassifiable/Attainment.
    Ionia CountyUnclassifiable/Attainment.
    Iosco CountyUnclassifiable/Attainment.
    Iron CountyUnclassifiable/Attainment.
    Isabella CountyUnclassifiable/Attainment.
    Jackson CountyUnclassifiable/Attainment.
    Kalamazoo CountyUnclassifiable/Attainment.
    Kalkaska CountyUnclassifiable/Attainment.
    Kent CountyUnclassifiable/Attainment.
    Keweenaw CountyUnclassifiable/Attainment.
    Lake CountyUnclassifiable/Attainment.
    Lapeer CountyUnclassifiable/Attainment.
    Leelanau CountyUnclassifiable/Attainment.
    Lenawee CountyUnclassifiable/Attainment.
    Luce CountyUnclassifiable/Attainment.
    Mackinac CountyUnclassifiable/Attainment.
    Manistee CountyUnclassifiable/Attainment.
    Marquette CountyUnclassifiable/Attainment.
    Mason CountyUnclassifiable/Attainment.
    Mecosta CountyUnclassifiable/Attainment.
    Menominee CountyUnclassifiable/Attainment.
    Midland CountyUnclassifiable/Attainment.
    Missaukee CountyUnclassifiable/Attainment.
    Montcalm CountyUnclassifiable/Attainment.
    Montmorency CountyUnclassifiable/Attainment.
    Muskegon CountyUnclassifiable/Attainment.
    Newaygo CountyUnclassifiable/Attainment.
    Oceana CountyUnclassifiable/Attainment.
    Ogemaw CountyUnclassifiable/Attainment.
    Ontonagon CountyUnclassifiable/Attainment.
    Osceola CountyUnclassifiable/Attainment.
    Oscoda CountyUnclassifiable/Attainment.
    Otsego CountyUnclassifiable/Attainment.
    Ottawa CountyUnclassifiable/Attainment.
    Presque Isle CountyUnclassifiable/Attainment.
    Roscommon CountyUnclassifiable/Attainment.
    Saginaw CountyUnclassifiable/Attainment.
    St. Joseph CountyUnclassifiable/Attainment.
    Sanilac CountyUnclassifiable/Attainment.
    Schoolcraft CountyUnclassifiable/Attainment.
    Shiawassee CountyUnclassifiable/Attainment.
    Tuscola CountyUnclassifiable/Attainment.
    Van Buren CountyUnclassifiable/Attainment.
    Wexford 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.

    Michigan—2012 Annual PM2.5 NAAQS

    [Primary]

    Designated area1 Designation Classification
    Date2 Type Date2 Type
    Statewide:
    Alcona CountyUnclassifiable/Attainment
    Alger CountyUnclassifiable/Attainment
    Allegan CountyUnclassifiable/Attainment
    Alpena CountyUnclassifiable/Attainment
    Antrim CountyUnclassifiable/Attainment
    Arenac CountyUnclassifiable/Attainment
    Baraga CountyUnclassifiable/Attainment
    Barry CountyUnclassifiable/Attainment
    Bay CountyUnclassifiable/Attainment
    Benzie CountyUnclassifiable/Attainment
    Berrien CountyUnclassifiable/Attainment
    Branch CountyUnclassifiable/Attainment
    Calhoun CountyUnclassifiable/Attainment
    Cass CountyUnclassifiable/Attainment
    Charlevoix CountyUnclassifiable/Attainment
    Cheboygan CountyUnclassifiable/Attainment
    Chippewa CountyUnclassifiable/Attainment
    Clare CountyUnclassifiable/Attainment
    Clinton CountyUnclassifiable/Attainment
    Crawford CountyUnclassifiable/Attainment
    Delta CountyUnclassifiable/Attainment
    Dickinson CountyUnclassifiable/Attainment
    Eaton CountyUnclassifiable/Attainment
    Emmet CountyUnclassifiable/Attainment
    Genesee CountyUnclassifiable/Attainment
    Gladwin CountyUnclassifiable/Attainment
    Gogebic CountyUnclassifiable/Attainment
    Grand Traverse CountyUnclassifiable/Attainment
    Gratiot CountyUnclassifiable/Attainment
    Hillsdale CountyUnclassifiable/Attainment
    Houghton CountyUnclassifiable/Attainment
    Huron CountyUnclassifiable/Attainment
    Ingham CountyUnclassifiable/Attainment
    Ionia CountyUnclassifiable/Attainment
    Iosco CountyUnclassifiable/Attainment
    Iron CountyUnclassifiable/Attainment
    Isabella CountyUnclassifiable/Attainment
    Jackson CountyUnclassifiable/Attainment
    Kalamazoo CountyUnclassifiable/Attainment
    Kalkaska CountyUnclassifiable/Attainment
    Kent CountyUnclassifiable/Attainment
    Keweenaw CountyUnclassifiable/Attainment
    Lake CountyUnclassifiable/Attainment
    Lapeer CountyUnclassifiable/Attainment
    Leelanau CountyUnclassifiable/Attainment
    Lenawee CountyUnclassifiable/Attainment
    Livingston CountyUnclassifiable/Attainment
    Luce CountyUnclassifiable/Attainment
    Mackinac CountyUnclassifiable/Attainment
    Macomb CountyUnclassifiable/Attainment
    Manistee CountyUnclassifiable/Attainment
    Marquette CountyUnclassifiable/Attainment
    Mason CountyUnclassifiable/Attainment
    Mecosta CountyUnclassifiable/Attainment
    Menominee CountyUnclassifiable/Attainment
    Midland CountyUnclassifiable/Attainment
    Missaukee CountyUnclassifiable/Attainment
    Monroe CountyUnclassifiable/Attainment
    Montcalm CountyUnclassifiable/Attainment
    Montmorency CountyUnclassifiable/Attainment
    Muskegon CountyUnclassifiable/Attainment
    Newaygo CountyUnclassifiable/Attainment
    Oakland CountyUnclassifiable/Attainment
    Oceana CountyUnclassifiable/Attainment
    Ogemaw CountyUnclassifiable/Attainment
    Ontonagon CountyUnclassifiable/Attainment
    Osceola CountyUnclassifiable/Attainment
    Oscoda CountyUnclassifiable/Attainment
    Otsego CountyUnclassifiable/Attainment
    Ottawa CountyUnclassifiable/Attainment
    Presque Isle CountyUnclassifiable/Attainment
    Roscommon CountyUnclassifiable/Attainment
    Saginaw CountyUnclassifiable/Attainment
    St. Clair CountyUnclassifiable/Attainment
    St. Joseph CountyUnclassifiable/Attainment
    Sanilac CountyUnclassifiable/Attainment
    Schoolcraft CountyUnclassifiable/Attainment
    Shiawassee CountyUnclassifiable/Attainment
    Tuscola CountyUnclassifiable/Attainment
    Van Buren CountyUnclassifiable/Attainment
    Washtenaw CountyUnclassifiable/Attainment
    Wayne CountyUnclassifiable/Attainment
    Wexford 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.

    Michigan—1997 24-Hour PM2.5 NAAQS

    [Primary and Secondary]

    Designated area Designationa Classification
    Date1 Type Date Type
    Detroit-Ann Arbor, MI:
    Livingston CountyUnclassifiable/Attainment.
    Macomb CountyUnclassifiable/Attainment.
    Monroe CountyUnclassifiable/Attainment.
    Oakland CountyUnclassifiable/Attainment.
    St. Clair CountyUnclassifiable/Attainment.
    Washtenaw CountyUnclassifiable/Attainment.
    Wayne CountyUnclassifiable/Attainment.
    Rest of State:
    Alcona CountyUnclassifiable/Attainment.
    Alger CountyUnclassifiable/Attainment.
    Allegan CountyUnclassifiable/Attainment.
    Alpena CountyUnclassifiable/Attainment.
    Antrim CountyUnclassifiable/Attainment.
    Arenac CountyUnclassifiable/Attainment.
    Baraga CountyUnclassifiable/Attainment.
    Barry CountyUnclassifiable/Attainment.
    Bay CountyUnclassifiable/Attainment.
    Benzie CountyUnclassifiable/Attainment.
    Berrien CountyUnclassifiable/Attainment.
    Branch CountyUnclassifiable/Attainment.
    Calhoun CountyUnclassifiable/Attainment.
    Cass CountyUnclassifiable/Attainment.
    Charlevoix CountyUnclassifiable/Attainment.
    Cheboygan CountyUnclassifiable/Attainment.
    Chippewa CountyUnclassifiable/Attainment.
    Clare CountyUnclassifiable/Attainment.
    Clinton CountyUnclassifiable/Attainment.
    Crawford CountyUnclassifiable/Attainment.
    Delta CountyUnclassifiable/Attainment.
    Dickinson CountyUnclassifiable/Attainment.
    Eaton CountyUnclassifiable/Attainment.
    Emmet CountyUnclassifiable/Attainment.
    Genesee CountyUnclassifiable/Attainment.
    Gladwin CountyUnclassifiable/Attainment.
    Gogebic CountyUnclassifiable/Attainment.
    Grand Traverse CountyUnclassifiable/Attainment.
    Gratiot CountyUnclassifiable/Attainment.
    Hillsdale CountyUnclassifiable/Attainment.
    Houghton CountyUnclassifiable/Attainment.
    Huron CountyUnclassifiable/Attainment.
    Ingham CountyUnclassifiable/Attainment.
    Ionia CountyUnclassifiable/Attainment.
    Iosco CountyUnclassifiable/Attainment.
    Iron CountyUnclassifiable/Attainment.
    Isabella CountyUnclassifiable/Attainment.
    Jackson CountyUnclassifiable/Attainment.
    Kalamazoo CountyUnclassifiable/Attainment.
    Kalkaska CountyUnclassifiable/Attainment.
    Kent CountyUnclassifiable/Attainment.
    Keweenaw CountyUnclassifiable/Attainment.
    Lake CountyUnclassifiable/Attainment.
    Lapeer CountyUnclassifiable/Attainment.
    Leelanau CountyUnclassifiable/Attainment.
    Lenawee CountyUnclassifiable/Attainment.
    Luce CountyUnclassifiable/Attainment.
    Mackinac CountyUnclassifiable/Attainment.
    Manistee CountyUnclassifiable/Attainment.
    Marquette CountyUnclassifiable/Attainment.
    Mason CountyUnclassifiable/Attainment.
    Mecosta CountyUnclassifiable/Attainment.
    Menominee CountyUnclassifiable/Attainment.
    Midland CountyUnclassifiable/Attainment.
    Missaukee CountyUnclassifiable/Attainment.
    Montcalm CountyUnclassifiable/Attainment.
    Montmorency CountyUnclassifiable/Attainment.
    Muskegon CountyUnclassifiable/Attainment.
    Newaygo CountyUnclassifiable/Attainment.
    Oceana CountyUnclassifiable/Attainment.
    Ogemaw CountyUnclassifiable/Attainment.
    Ontonagon CountyUnclassifiable/Attainment.
    Osceola CountyUnclassifiable/Attainment.
    Oscoda CountyUnclassifiable/Attainment.
    Otsego CountyUnclassifiable/Attainment.
    Ottawa CountyUnclassifiable/Attainment.
    Presque Isle CountyUnclassifiable/Attainment.
    Roscommon CountyUnclassifiable/Attainment.
    Saginaw CountyUnclassifiable/Attainment.
    St. Joseph CountyUnclassifiable/Attainment.
    Sanilac CountyUnclassifiable/Attainment.
    Schoolcraft CountyUnclassifiable/Attainment.
    Shiawassee CountyUnclassifiable/Attainment.
    Tuscola CountyUnclassifiable/Attainment.
    Van Buren CountyUnclassifiable/Attainment.
    Wexford 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.

    Michigan—2006 24-Hour PM2.5 NAAQS

    [Primary and Secondary]

    Designated area Designationa Classification
    Date1 Type Date Type
    Detroit-Ann Arbor, MI:8/29/13Attainment.
    Livingston County
    Macomb County
    Monroe County
    Oakland County
    St. Clair County
    Washtenaw County
    Wayne County
    Rest of State:
    Alcona CountyUnclassifiable/Attainment.
    Alger CountyUnclassifiable/Attainment.
    Allegan CountyUnclassifiable/Attainment.
    Alpena CountyUnclassifiable/Attainment.
    Antrim CountyUnclassifiable/Attainment.
    Arenac CountyUnclassifiable/Attainment.
    Baraga CountyUnclassifiable/Attainment.
    Barry CountyUnclassifiable/Attainment.
    Bay CountyUnclassifiable/Attainment.
    Benzie CountyUnclassifiable/Attainment.
    Berrien CountyUnclassifiable/Attainment.
    Branch CountyUnclassifiable/Attainment.
    Calhoun CountyUnclassifiable/Attainment.
    Cass CountyUnclassifiable/Attainment.
    Charlevoix CountyUnclassifiable/Attainment.
    Cheboygan CountyUnclassifiable/Attainment.
    Chippewa CountyUnclassifiable/Attainment.
    Clare CountyUnclassifiable/Attainment.
    Clinton CountyUnclassifiable/Attainment.
    Crawford CountyUnclassifiable/Attainment.
    Delta CountyUnclassifiable/Attainment.
    Dickinson CountyUnclassifiable/Attainment.
    Eaton CountyUnclassifiable/Attainment.
    Emmet CountyUnclassifiable/Attainment.
    Genesee CountyUnclassifiable/Attainment.
    Gladwin CountyUnclassifiable/Attainment.
    Gogebic CountyUnclassifiable/Attainment.
    Grand Traverse CountyUnclassifiable/Attainment.
    Gratiot CountyUnclassifiable/Attainment.
    Hillsdale CountyUnclassifiable/Attainment.
    Houghton CountyUnclassifiable/Attainment.
    Huron CountyUnclassifiable/Attainment.
    Ingham CountyUnclassifiable/Attainment.
    Ionia CountyUnclassifiable/Attainment.
    Iosco CountyUnclassifiable/Attainment.
    Iron CountyUnclassifiable/Attainment.
    Isabella CountyUnclassifiable/Attainment.
    Jackson CountyUnclassifiable/Attainment.
    Kalamazoo CountyUnclassifiable/Attainment.
    Kalkaska CountyUnclassifiable/Attainment.
    Kent CountyUnclassifiable/Attainment.
    Keweenaw CountyUnclassifiable/Attainment.
    Lake CountyUnclassifiable/Attainment.
    Lapeer CountyUnclassifiable/Attainment.
    Leelanau CountyUnclassifiable/Attainment.
    Lenawee CountyUnclassifiable/Attainment.
    Luce CountyUnclassifiable/Attainment.
    Mackinac CountyUnclassifiable/Attainment.
    Manistee CountyUnclassifiable/Attainment.
    Marquette CountyUnclassifiable/Attainment.
    Mason CountyUnclassifiable/Attainment.
    Mecosta CountyUnclassifiable/Attainment.
    Menominee CountyUnclassifiable/Attainment.
    Midland CountyUnclassifiable/Attainment.
    Missaukee CountyUnclassifiable/Attainment.
    Montcalm CountyUnclassifiable/Attainment.
    Montmorency CountyUnclassifiable/Attainment.
    Muskegon CountyUnclassifiable/Attainment.
    Newaygo CountyUnclassifiable/Attainment.
    Oceana CountyUnclassifiable/Attainment.
    Ogemaw CountyUnclassifiable/Attainment.
    Ontonagon CountyUnclassifiable/Attainment.
    Osceola CountyUnclassifiable/Attainment.
    Oscoda CountyUnclassifiable/Attainment.
    Otsego CountyUnclassifiable/Attainment.
    Ottawa CountyUnclassifiable/Attainment.
    Presque Isle CountyUnclassifiable/Attainment.
    Roscommon CountyUnclassifiable/Attainment.
    Saginaw CountyUnclassifiable/Attainment.
    St. Joseph CountyUnclassifiable/Attainment.
    Sanilac CountyUnclassifiable/Attainment.
    Schoolcraft CountyUnclassifiable/Attainment.
    Shiawassee CountyUnclassifiable/Attainment.
    Tuscola CountyUnclassifiable/Attainment.
    Van Buren CountyUnclassifiable/Attainment.
    Wexford 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.

    Michigan—NO2 (1971 Annual Standard)

    Designated area Does not meet primary standards Cannot be classified or better than national standards
    State of MichiganX

    Michigan—NO2 (2010 1-Hour Standard)

    Designated area Designationa
    Date1 Type
    Alcona CountyUnclassifiable/Attainment.
    Alger CountyUnclassifiable/Attainment.
    Allegan CountyUnclassifiable/Attainment.
    Alpena CountyUnclassifiable/Attainment.
    Antrim CountyUnclassifiable/Attainment.
    Arenac CountyUnclassifiable/Attainment.
    Baraga CountyUnclassifiable/Attainment.
    Barry CountyUnclassifiable/Attainment.
    Bay CountyUnclassifiable/Attainment.
    Benzie CountyUnclassifiable/Attainment.
    Berrien CountyUnclassifiable/Attainment.
    Branch CountyUnclassifiable/Attainment.
    Calhoun CountyUnclassifiable/Attainment.
    Cass CountyUnclassifiable/Attainment.
    Charlevoix CountyUnclassifiable/Attainment.
    Cheboygan CountyUnclassifiable/Attainment.
    Chippewa CountyUnclassifiable/Attainment.
    Clare CountyUnclassifiable/Attainment.
    Clinton CountyUnclassifiable/Attainment.
    Crawford CountyUnclassifiable/Attainment.
    Delta CountyUnclassifiable/Attainment.
    Dickinson CountyUnclassifiable/Attainment.
    Eaton CountyUnclassifiable/Attainment.
    Emmet CountyUnclassifiable/Attainment.
    Genesee CountyUnclassifiable/Attainment.
    Gladwin CountyUnclassifiable/Attainment.
    Gogebic CountyUnclassifiable/Attainment.
    Grand Traverse CountyUnclassifiable/Attainment.
    Gratiot CountyUnclassifiable/Attainment.
    Hillsdale CountyUnclassifiable/Attainment.
    Houghton CountyUnclassifiable/Attainment.
    Huron CountyUnclassifiable/Attainment.
    Ingham CountyUnclassifiable/Attainment.
    Ionia CountyUnclassifiable/Attainment.
    Iosco CountyUnclassifiable/Attainment.
    Iron CountyUnclassifiable/Attainment.
    Isabella CountyUnclassifiable/Attainment.
    Jackson CountyUnclassifiable/Attainment.
    Kalamazoo CountyUnclassifiable/Attainment.
    Kalkaska CountyUnclassifiable/Attainment.
    Kent CountyUnclassifiable/Attainment.
    Keweenaw CountyUnclassifiable/Attainment.
    Lake CountyUnclassifiable/Attainment.
    Lapeer CountyUnclassifiable/Attainment.
    Leelanau CountyUnclassifiable/Attainment.
    Lenawee CountyUnclassifiable/Attainment.
    Livingston CountyUnclassifiable/Attainment.
    Luce CountyUnclassifiable/Attainment.
    Mackinac CountyUnclassifiable/Attainment.
    Macomb CountyUnclassifiable/Attainment.
    Manistee CountyUnclassifiable/Attainment.
    Marquette CountyUnclassifiable/Attainment.
    Mason CountyUnclassifiable/Attainment.
    Mecosta CountyUnclassifiable/Attainment.
    Menominee CountyUnclassifiable/Attainment.
    Midland CountyUnclassifiable/Attainment.
    Missaukee CountyUnclassifiable/Attainment.
    Monroe CountyUnclassifiable/Attainment.
    Montcalm CountyUnclassifiable/Attainment.
    Montmorency CountyUnclassifiable/Attainment.
    Muskegon CountyUnclassifiable/Attainment.
    Newaygo CountyUnclassifiable/Attainment.
    Oakland CountyUnclassifiable/Attainment.
    Oceana CountyUnclassifiable/Attainment.
    Ogemaw CountyUnclassifiable/Attainment.
    Ontonagon CountyUnclassifiable/Attainment.
    Osceola CountyUnclassifiable/Attainment.
    Oscoda CountyUnclassifiable/Attainment.
    Otsego CountyUnclassifiable/Attainment.
    Ottawa CountyUnclassifiable/Attainment.
    Presque Isle CountyUnclassifiable/Attainment.
    Roscommon CountyUnclassifiable/Attainment.
    Saginaw CountyUnclassifiable/Attainment.
    St. Clair CountyUnclassifiable/Attainment.
    St. Joseph CountyUnclassifiable/Attainment.
    Sanilac CountyUnclassifiable/Attainment.
    Schoolcraft CountyUnclassifiable/Attainment.
    Shiawassee CountyUnclassifiable/Attainment.
    Tuscola CountyUnclassifiable/Attainment.
    Van Buren CountyUnclassifiable/Attainment.
    Washtenaw CountyUnclassifiable/Attainment.
    Wayne CountyUnclassifiable/Attainment.
    Wexford 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.

    Michigan—1997 8-Hour Ozone NAAQS

    [Primary and Secondary]

    Designated area Designationa Category/classification
    Date1 Type Date1 Type
    Allegan County, MI:
    Allegan County9/24/2010Attainment
    Barry County Area:
    Benton Harbor, MI:
    Berrien County5/16/2007Attainment
    Benzie County, MI:
    Benzie County5/16/2007Attainment
    Branch County Area:
    Branch CountyUnclassifiable/Attainment
    Cass County, MI:
    Cass County5/16/2007Attainment
    Detroit-Ann Arbor, MI:
    Lenawee County6/29/2009Attainment
    Livingston County.
    Macomb County
    Monroe County
    Oakland County
    St. Clair County
    Washtenaw County
    Wayne County
    Flint, MI:
    Genesee County5/16/2007Attainment
    Lapeer County
    Grand Rapids, MI:
    Kent County5/16/2007Attainment
    Ottawa County
    Gratiot County Area:
    Gratiot CountyUnclassifiable/Attainment
    Hillsdale County Area:
    Hillsdale CountyUnclassifiable/Attainment
    Huron County, MI:
    Huron County5/16/2007Attainment
    Ionia County Area:
    Ionia CountyUnclassifiable/Attainment
    Jackson Area:
    Jackson CountyUnclassifiable/Attainment
    Kalamazoo-Battle Creek, MI:
    Calhoun County5/16/2007Attainment
    Kalamazoo County
    Van Buren County
    Lansing-East Lansing, MI:
    Clinton County5/16/2007Attainment
    Eaton County
    Ingham County
    Mason County, MI:
    Mason County5/16/2007Attainment
    Montcalm Area:
    Montcalm CountyUnclassifiable/Attainment
    Muskegon, MI:
    Muskegon County5/16/2007Attainment
    Saginaw-Bay City-Midland Area:
    Bay CountyUnclassifiable/Attainment
    Midland CountyUnclassifiable/Attainment
    Saginaw CountyUnclassifiable/Attainment
    Sanilac County Area:
    Sanilac CountyUnclassifiable/Attainment
    Shiawassee County Area:
    Shiawassee CountyUnclassifiable/Attainment
    St Joseph County Area:
    St Joseph CountyUnclassifiable/Attainment
    Tuscola County Area:
    Tuscola CountyUnclassifiable/Attainment
    AQCR 122 Central Michigan Intrastate (remainder of)Unclassifiable/Attainment
    Arenac County
    Clare County
    Gladwin County
    Iosco County
    Isabella County
    Lake County
    Mecosta County
    Newaygo County
    Oceana County
    Ogemaw County
    Osceola County
    Roscommon County
    AQCR 126 Upper Michigan Intrastate (part)Unclassifiable/Attainment
    Marquette County
    AQCR 126 Upper Michigan Intrastate (remainder of)Unclassifiable/Attainment
    Alcona County
    Alger County
    Alpena County
    Antrim County
    Baraga County
    Charlevoix County
    Cheboygan County
    Chippewa County
    Crawford County
    Delta County
    Dickinson County
    Emmet County
    Gogebic County
    Grand Traverse County
    Houghton County
    Iron County
    Kalkaska County
    Keweenaw County
    Leelanau County
    Luce County
    Mackinac County
    Manistee County
    Menominee County
    Missaukee County
    Montmorency County
    Ontonagon County
    Oscoda County
    Otsego County
    Presque Isle County
    Schoolcraft County
    Wexford County

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

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

    2 November 22, 2004.

    Michigan—2008 8-Hour Ozone NAAQS

    [Primary and Secondary]

    Designated area Designation Classification
    Date1 Type Date1 Type
    Statewide and Any Areas of Indian CountryUnclassifiable/Attainment

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

    Michigan—2015 8-Hour Ozone NAAQS

    [Primary and Secondary]

    Designated area1 Designation Classification
    Date2 Type Date2 Type
    Allegan County, MINonattainmentNovember 7, 202211/7/22Moderate.
    Allegan County (part):
    Casco Township, Cheshire Township, City of Douglas, City of Holland, City of Saugatuck, Clyde Township, Fillmore Township, Ganges Township, Heath Township, Laketown Township, Lee Township, Manilus Township, Overisel Township, Saugatuck Township, and Valley Township.
    Berrien County, MINonattainmentNovember 7, 202211/7/22Moderate.
    Berrien County.
    Detroit, MI5/19/23Attainment
    Livingston County
    Macomb County
    Monroe County
    Oakland County
    St Clair County
    Washtenaw County
    Wayne County
    Muskegon County, MINonattainmentNovember 7, 202211/7/22Moderate.
    Muskegon County (part):
    Blue Lake Township, City of Montague, City of Muskegon, City of Muskegon Heights, City of North Muskegon, City of Roosevelt Park, City of Whitehall, Dalton Township, (incl. Village of Lakewood Club), Fruitland Township, Fruitport Township, (incl. Village of Fruitport) Laketon Township, Montague Township, Muskegon Township, Norton Shores Township, White River Township, and Whitehall Township.
    Alcona County1/16/18Attainment/Unclassifiable
    Alger County1/16/18Attainment/Unclassifiable
    Allegan County (part) remainderAttainment/Unclassifiable
    Alpena County1/16/18Attainment/Unclassifiable
    Antrim County1/16/18Attainment/Unclassifiable
    Arenac County1/16/18Attainment/Unclassifiable
    Baraga County1/16/18Attainment/Unclassifiable
    Barry CountyAttainment/Unclassifiable
    Bay County1/16/18Attainment/Unclassifiable
    Benzie County1/16/18Attainment/Unclassifiable
    Branch County1/16/18Attainment/Unclassifiable
    Calhoun County1/16/18Attainment/Unclassifiable
    Cass CountyAttainment/Unclassifiable
    Charlevoix County1/16/18Attainment/Unclassifiable
    Cheboygan County1/16/18Attainment/Unclassifiable
    Chippewa County1/16/18Attainment/Unclassifiable
    Clare County1/16/18Attainment/Unclassifiable
    Clinton County1/16/18Attainment/Unclassifiable
    Crawford County1/16/18Attainment/Unclassifiable
    Delta County1/16/18Attainment/Unclassifiable
    Dickinson County1/16/18Attainment/Unclassifiable
    Eaton County1/16/18Attainment/Unclassifiable
    Emmet County1/16/18Attainment/Unclassifiable
    Genesee CountyAttainment/Unclassifiable
    Gladwin County1/16/18Attainment/Unclassifiable
    Gogebic County1/16/18Attainment/Unclassifiable
    Grand Traverse County1/16/18Attainment/Unclassifiable
    Gratiot County1/16/18Attainment/Unclassifiable
    Hillsdale County1/16/18Attainment/Unclassifiable
    Houghton County1/16/18Attainment/Unclassifiable
    Huron County1/16/18Attainment/Unclassifiable
    Ingham County1/16/18Attainment/Unclassifiable
    Ionia CountyAttainment/Unclassifiable
    Iosco County1/16/18Attainment/Unclassifiable
    Iron County1/16/18Attainment/Unclassifiable
    Isabella County1/16/18Attainment/Unclassifiable
    Jackson County1/16/18Attainment/Unclassifiable
    Kalamazoo CountyAttainment/Unclassifiable
    Kalkaska County1/16/18Attainment/Unclassifiable
    Kent CountyAttainment/Unclassifiable
    Keweenaw County1/16/18Attainment/Unclassifiable
    Lake County1/16/18Attainment/Unclassifiable
    Lapeer CountyAttainment/Unclassifiable
    Leelanau County1/16/18Attainment/Unclassifiable
    Lenawee CountyAttainment/Unclassifiable
    Luce County1/16/18Attainment/Unclassifiable
    Mackinac County1/16/18Attainment/Unclassifiable
    Manistee County1/16/18Attainment/Unclassifiable
    Marquette County1/16/18Attainment/Unclassifiable
    Mason County1/16/18Attainment/Unclassifiable
    Mecosta CountyAttainment/Unclassifiable
    Menominee County1/16/18Attainment/Unclassifiable
    Midland County1/16/18Attainment/Unclassifiable
    Missaukee County1/16/18Attainment/Unclassifiable
    Montcalm CountyAttainment/Unclassifiable
    Montmorency County1/16/18Attainment/Unclassifiable
    Muskegon County (part) remainderAttainment/Unclassifiable
    Newaygo CountyAttainment/Unclassifiable
    Oceana CountyAttainment/Unclassifiable
    Ogemaw County1/16/18Attainment/Unclassifiable
    Ontonagon County1/16/18Attainment/Unclassifiable
    Osceola County1/16/18Attainment/Unclassifiable
    Oscoda County1/16/18Attainment/Unclassifiable
    Otsego County1/16/18Attainment/Unclassifiable
    Ottawa CountyAttainment/Unclassifiable
    Presque Isle County1/16/18Attainment/Unclassifiable
    Roscommon County1/16/18Attainment/Unclassifiable
    Saginaw County1/16/18Attainment/Unclassifiable
    St. Joseph County1/16/18Attainment/Unclassifiable
    Sanilac CountyAttainment/Unclassifiable
    Schoolcraft County1/16/18Attainment/Unclassifiable
    Shiawassee County1/16/18Attainment/Unclassifiable
    Tuscola County1/16/18Attainment/Unclassifiable
    Van Buren CountyAttainment/Unclassifiable
    Wexford 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.

    Michigan—2008 Lead NAAQS

    Designated area Designation for the 2008 NAAQSa
    Date1 Type
    Belding, MI:
    Ionia County (part)5/31/2017Attainment.
    The area bounded by the following coordinates: Southeast corner by latitude 43.0956705 N and longitude 85.2130771 W; southwest corner (intersection of S. Broas St. and W. Washington St.) by latitude 43.0960358 N and longitude 85.2324027 W; northeast corner by latitude 43.1074942 N and longitude 85.2132313 W; western boundary 1 (intersection of W. Ellis St. and the vertical extension of S. Broas St.) by latitude 43.1033277 N and longitude 85.2322553 W; western boundary 2 (intersection of W. Ellis St. and N. Bridge St.) by latitude 43.1033911 N and longitude 85.2278464 W; western boundary 3 (intersection of N. Bridge St. and Earle St.) by latitude 43.1074479 N and longitude 85.2279722 W.
    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 8964, Mar. 3, 1978]

    Editorial Note

    Editorial Note:

    For Federal Register citations affecting § 81.323, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.