Regulations last checked for updates: May 01, 2025

Title 40 - Protection of Environment last revised: Nov 01, 2025
All TitlesTitle 40Chapter IPart 81Subpart C - Subpart C—Section 107 Attainment Status Designations
View all text of Subpart C [§ 81.300 - § 81.356]
§ 81.343 - Tennessee.

Tennessee—TSP

Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
Anderson CountyX
Bedford CountyX
Benton CountyX
Bledsoe CountyX
Blount CountyX
Bradley CountyX
Campbell CountyX
Rest of Campbell CountyX
Cannon CountyX
Carroll CountyX
Carter CountyX
Cheatham CountyX
Chester CountyX
Claiborne CountyX
Clay CountyX
Cocke CountyX
Coffee CountyX
Crockett CountyX
Cumberland CountyX
Those portions of Davidson County within a section of downtown Nashville and in West NashvilleX
Rest of Davidson CountyX
Decatur CountyX
DeKalb CountyX
Dickson CountyX
Dyer CountyX
Fayette CountyX
Fentress CountyX
Franklin CountyX
Gibson CountyX
Giles CountyX
Grainger CountyX
Greene CountyX
Grundy CountyX
Hamblen CountyX
That portion of Hamilton County within approximately the city limits of ChattanoogaX
Rest of Hamilton CountyX
Hancock CountyX
Hardeman CountyX
Hardin CountyX
Hawkins CountyX
Haywood CountyX
Henderson CountyX
Henry CountyX
Hickman CountyX
Houston CountyX
Humphreys CountyX
Jackson CountyX
Jefferson CountyX
Johnson CountyX
That portion of Knox County within a section of downtown KnoxvilleX
Rest of Knox CountyX
Lake CountyX
Lauderdale CountyX
Lawrence CountyX
Lewis CountyX
Lincoln CountyX
Loudon CountyX
McMinn CountyX
McNairy CountyX
Macon CountyX
Madison CountyX
Marion CountyX
Marshall CountyX
That portion of Maury County within the northern section of ColumbiaX
Rest of Maury CountyX
Meigs CountyX
Monroe CountyX
Montgomery CountyX
Moore CountyX
Morgan CountyX
Obion CountyX
Overton CountyX
Perry CountyX
Pickett CountyX
Polk CountyX
Putnam CountyX
Rhea CountyX
Roane CountyX
Robertson CountyX
Rutherford CountyX
Scott CountyX
Sequatchie CountyX
Sevier CountyX
Shelby CountyX
Smith CountyX
Stewart CountyX
Sullivan CountyX
Sumner CountyX
Tipton CountyX
Trousdale CountyX
Unicoi CountyX
Union CountyX
Van Buren CountyX
Warren CountyX
Washington CountyX
Wayne CountyX
Weakley CountyX
White CountyX
Wilson CountyX
Williamson CountyX

Tennessee—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
Anderson CountyX
Bedford CountyX
That portion of Benton County surrounding TVA's Johnsonville plantX
Rest of Benton CountyX
Bledsoe CountyX
Blount CountyX
Bradley CountyX
Campbell CountyX
Cannon CountyX
Carroll CountyX
Carter CountyX
Cheatham CountyX
Chester CountyX
Claiborne CountyX
Clay CountyX
Cocke CountyX
Coffee CountyX
Crockett CountyX
Cumberland CountyX
Davidson CountyX
Decatur CountyX
DeKalb CountyX
Dickson CountyX
Dyer CountyX
Fayette CountyX
Fentress CountyX
Franklin CountyX
Gibson CountyX
Giles CountyX
Grainger CountyX
Greene CountyX
Grundy CountyX
Hamblen CountyX
Hamilton CountyX
Hancock CountyX
Hardeman CountyX
Hardin CountyX
Hawkins CountyX
Haywood CountyX
Henderson CountyX
Henry CountyX
Hickman CountyX
Houston CountyX
That portion of Humphreys County surrounding TVA's Johnsonville plantX
Rest of Humphreys CountyX
Jackson CountyX
Jefferson CountyX
Johnson CountyX
Knox CountyX
Lake CountyX
Lauderdale CountyX
Lawrence CountyX
Lewis CountyX
Lincoln CountyX
Loudon CountyX
McMinn CountyX
McNairy CountyX
Macon CountyX
Madison CountyX
Marion CountyX
Marshall CountyX
Maury CountyX
Meigs CountyX
Monroe CountyX
Montgomery CountyX
Moore CountyX
Morgan CountyX
Obion CountyX
Overton CountyX
Perry CountyX
Pickett CountyX
Polk CountyX
Putnam CountyX
Rhea CountyX
Roane CountyX
Robertson CountyX
Rutherford CountyX
Scott CountyX
Sequatchie CountyX
Sevier CountyX
Shelby CountyX
Smith CountyX
Stewart CountyX
Sullivan CountyX
Sumner CountyX
Tipton CountyX
Trousdale CountyX
Unicoi CountyX
Union CountyX
Van Buren CountyX
Warren CountyX
Washington CountyX
Wayne CountyX
Weakley CountyX
White CountyX
Williamson CountyX
Wilson CountyX

Tennessee—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area Designation
Date 1 Type
Sullivan County, TN 210/4/2013Nonattainment.
Sullivan County (part)
That portion of Sullivan County encompassing a circle having its center at the B-253 power house coordinates 36.5186 N; 82.5350 W and having a 3-kilometer radius
Sumner County, TN 206/24/2021Attainment/Unclassifiable.
Sumner County
Rest of State: 3
Anderson CountyAttainment/Unclassifiable.
Bedford CountyAttainment/Unclassifiable.
Benton CountyAttainment/Unclassifiable.
Bledsoe CountyAttainment/Unclassifiable.
Blount CountyAttainment/Unclassifiable.
Bradley CountyAttainment/Unclassifiable.
Campbell CountyAttainment/Unclassifiable.
Cannon CountyAttainment/Unclassifiable.
Carroll CountyAttainment/Unclassifiable.
Carter CountyAttainment/Unclassifiable.
Cheatham CountyAttainment/Unclassifiable.
Chester CountyAttainment/Unclassifiable.
Claiborne CountyAttainment/Unclassifiable.
Clay CountyAttainment/Unclassifiable.
Cocke CountyAttainment/Unclassifiable.
Coffee CountyAttainment/Unclassifiable.
Crockett CountyAttainment/Unclassifiable.
Cumberland CountyAttainment/Unclassifiable.
Davidson CountyAttainment/Unclassifiable.
Decatur CountyAttainment/Unclassifiable.
DeKalb CountyAttainment/Unclassifiable.
Dickson CountyAttainment/Unclassifiable.
Dyer CountyAttainment/Unclassifiable.
Fayette CountyAttainment/Unclassifiable.
Fentress CountyAttainment/Unclassifiable.
Franklin CountyAttainment/Unclassifiable.
Gibson CountyAttainment/Unclassifiable.
Giles CountyAttainment/Unclassifiable.
Grainger CountyAttainment/Unclassifiable.
Greene CountyAttainment/Unclassifiable.
Grundy CountyAttainment/Unclassifiable.
Hamblen CountyAttainment/Unclassifiable.
Hamilton CountyAttainment/Unclassifiable.
Hancock CountyAttainment/Unclassifiable.
Hardeman CountyAttainment/Unclassifiable.
Hardin CountyAttainment/Unclassifiable.
Hawkins CountyAttainment/Unclassifiable.
Haywood CountyAttainment/Unclassifiable.
Henderson CountyAttainment/Unclassifiable.
Henry CountyAttainment/Unclassifiable.
Hickman CountyAttainment/Unclassifiable.
Houston CountyAttainment/Unclassifiable.
Humphreys CountyAttainment/Unclassifiable.
Jackson CountyAttainment/Unclassifiable.
Jefferson CountyAttainment/Unclassifiable.
Johnson CountyAttainment/Unclassifiable.
Knox CountyAttainment/Unclassifiable.
Lake CountyAttainment/Unclassifiable.
Lauderdale CountyAttainment/Unclassifiable.
Lawrence CountyAttainment/Unclassifiable.
Lewis CountyAttainment/Unclassifiable.
Lincoln CountyAttainment/Unclassifiable.
Loudon CountyAttainment/Unclassifiable.
Macon CountyAttainment/Unclassifiable.
Madison CountyAttainment/Unclassifiable.
Marion CountyAttainment/Unclassifiable.
Marshall CountyAttainment/Unclassifiable.
Maury CountyAttainment/Unclassifiable.
McMinn CountyAttainment/Unclassifiable.
McNairy CountyAttainment/Unclassifiable.
Meigs CountyAttainment/Unclassifiable.
Monroe CountyAttainment/Unclassifiable.
Montgomery CountyAttainment/Unclassifiable.
Moore CountyAttainment/Unclassifiable.
Morgan CountyAttainment/Unclassifiable.
Obion CountyAttainment/Unclassifiable.
Overton CountyAttainment/Unclassifiable.
Perry CountyAttainment/Unclassifiable.
Pickett CountyAttainment/Unclassifiable.
Polk CountyAttainment/Unclassifiable.
Putnam CountyAttainment/Unclassifiable.
Rhea CountyAttainment/Unclassifiable.
Roane CountyAttainment/Unclassifiable.
Robertson CountyAttainment/Unclassifiable.
Rutherford CountyAttainment/Unclassifiable.
Scott CountyAttainment/Unclassifiable.
Sequatchie CountyAttainment/Unclassifiable.
Sevier CountyAttainment/Unclassifiable.
Shelby CountyAttainment/Unclassifiable.
Smith CountyAttainment/Unclassifiable.
Stewart CountyAttainment/Unclassifiable.
Sullivan County (part) (remainder)Attainment/Unclassifiable.
Sumner County, TN 26/24/2021Attainment/Unclassifiable.
Tipton CountyAttainment/Unclassifiable.
Trousdale CountyAttainment/Unclassifiable.
Unicoi CountyAttainment/Unclassifiable.
Union CountyAttainment/Unclassifiable.
Van Buren CountyAttainment/Unclassifiable.
Warren CountyAttainment/Unclassifiable.
Washington CountyAttainment/Unclassifiable.
Wayne CountyAttainment/Unclassifiable.
Weakley CountyAttainment/Unclassifiable.
White CountyAttainment/Unclassifiable.
Williamson CountyAttainment/Unclassifiable.
Wilson CountyAttainment/Unclassifiable.

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

2 Excludes Indian country located in each area, if any, unless otherwise specified.

3 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.

Tennessee—Carbon Monoxide

Designated Area Designation Classification
Date 1 Type Date 1 Type
Statewide
Anderson CountyUnclassifiable/Attainment
Bedford County
Benton County
Bledsoe County
Blount County
Bradley County
Campbell County
Cannon County
Carroll County
Carter County
Cheatham County
Chester County
Claiborne County
Clay County
Cocke County
Coffee County
Crockett County
Cumberland County
Davidson County
De Kalb County
Decatur County
Dickson County
Dyer County
Fayette County
Fentress County
Franklin County
Gibson County
Giles County
Grainger County
Greene County
Grundy County
Hamblen County
Hamilton County
Hancock County
Hardeman County
Hardin County
Hawkins County
Haywood County
Henderson County
Henry County
Hickman County
Houston County
Humphreys County
Jackson County
Jefferson County
Johnson County
Knox County
Lake County
Lauderdale County
Lawrence County
Lewis County
Lincoln County
Loudon County
Macon County
Madison County
Marion County
Marshall County
Maury County
McMinn County
McNairy County
Meigs County
Monroe County
Montgomery County
Moore County
Morgan County
Obion County
Overton County
Perry County
Pickett County
Polk County
Putnam County
Rhea County
Roane County
Robertson County
Rutherford County
Scott County
Sequatchie County
Sevier County
Shelby County9/26/1994
Smith County
Stewart County
Sullivan County
Sumner County
Tipton County
Trousdale County
Unicoi County
Union County
Van Buren County
Warren County
Washington County
Wayne County
Weakley County
White County
Williamson County
Wilson County

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

Tennessee—Ozone (1-Hour Standard) 2

Designated area Designation Classification
Date 1 Type Date 1 Type
Jefferson County Area:
Jefferson County11/15/1990Unclassifiable/Attainment11/15/1990
StatewideUnclassifiable/Attainment
Anderson County
Bedford County
Benton County
Bledsoe County
Blount County
Bradley County
Campbell County
Cannon County
Carroll County
Carter County
Cheatham County
Chester County
Claiborne County
Clay County
Cocke County
Coffee County
Crockett County
Cumberland County
DeKalb County
Decatur County
Dickson County
Davidson County
Dyer County
Fayette County
Fentress County
Franklin County
Gibson County
Giles County
Grainger County
Greene County
Grundy County
Hamblen County
Hamilton County
Hancock County
Hardeman County
Hardin County
Hawkins County
Haywood County
Henderson County
Henry County
Hickman County
Houston County
Humphreys County
Jackson County
Johnson County
Knox County
Lake County
Lauderdale County
Lawrence County
Lewis County
Lincoln County
Loudon County
Macon County
Madison County
Marion County
Marshall County
Maury County
McMinn County
McNairy County
Meigs County
Monroe County
Montgomery County
Moore County
Morgan County
Obion County
Overton County
Perry County
Pickett County
Polk County
Putnam County
Rhea County
Roane County
Robertson County
Rutherford County
Scott County
Sequatchie County
Sevier County
Shelby County
Smith County
Stewart County
Sullivan County
Sumner County
Tipton County
Trousdale County
Unicoi County
Union County
Van Buren County
Warren County
Washington County
Wayne County
Weakley County
White County
Williamson County
Wilson County

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

2 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Tennessee except the Chattanooga, Johnson City-Kingsport-Bristol, and Nashville areas where it is revoked effective April 15, 2009.

Tennessee—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date 2 Type
Chattanooga, TN-GA-AL:
Hamilton County11/4/2015Attainment
Knoxville, TN8/29/2017Attainment
Anderson CountyAttainment
Blount CountyAttainment
Knox CountyAttainment
Loudon CountyAttainment
Roane County (part)Attainment
The area described by U.S. Census 2000 block group identifier 47-145-0307-2.
Rest of State:
Bedford CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bledsoe CountyUnclassifiable/Attainment.
Bradley CountyUnclassifiable/Attainment.
Campbell CountyUnclassifiable/Attainment.
Cannon CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Carter CountyUnclassifiable/Attainment.
Cheatham CountyUnclassifiable/Attainment.
Chester CountyUnclassifiable/Attainment.
Claiborne CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Cocke CountyUnclassifiable/Attainment.
Coffee CountyUnclassifiable/Attainment.
Crockett CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
Davidson CountyUnclassifiable/Attainment.
Decatur CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
Dickson CountyUnclassifiable/Attainment.
Dyer CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Fentress CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Gibson CountyUnclassifiable/Attainment.
Giles CountyUnclassifiable/Attainment.
Grainger CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Hamblen CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardeman CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Hawkins CountyUnclassifiable/Attainment.
Haywood CountyUnclassifiable/Attainment.
Henderson CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Hickman CountyUnclassifiable/Attainment.
Houston CountyUnclassifiable/Attainment.
Humphreys CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Lake CountyUnclassifiable/Attainment.
Lauderdale CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lewis CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
McMinn CountyUnclassifiable/Attainment.
McNairy CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Maury CountyUnclassifiable/Attainment.
Meigs CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Moore CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
Obion CountyUnclassifiable/Attainment.
Overton CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pickett CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Rhea CountyUnclassifiable/Attainment.
Roane County (remainder)Unclassifiable/Attainment.
Robertson CountyUnclassifiable/Attainment.
Rutherford CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Sequatchie CountyUnclassifiable/Attainment.
Sevier CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Smith CountyUnclassifiable/Attainment.
Stewart CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Sumner CountyUnclassifiable/Attainment.
Tipton CountyUnclassifiable/Attainment.
Trousdale CountyUnclassifiable/Attainment.
Unicoi CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Van Buren CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Weakley CountyUnclassifiable/Attainment.
White CountyUnclassifiable/Attainment.
Williamson CountyUnclassifiable/Attainment.
Wilson 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.

2 This date is July 2, 2014, unless otherwise noted.

Tennessee—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Statewide:
Anderson CountyUnclassifiable/Attainment
Bedford CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Bledsoe CountyUnclassifiable/Attainment
Blount CountyUnclassifiable/Attainment
Bradley CountyUnclassifiable/Attainment
Campbell CountyUnclassifiable/Attainment
Cannon CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Carter CountyUnclassifiable/Attainment
Cheatham CountyUnclassifiable/Attainment
Chester CountyUnclassifiable/Attainment
Claiborne CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Cocke CountyUnclassifiable/Attainment
Coffee CountyUnclassifiable/Attainment
Crockett CountyUnclassifiable/Attainment
Cumberland CountyUnclassifiable/Attainment
Davidson CountyUnclassifiable/Attainment
Decatur CountyUnclassifiable/Attainment
DeKalb CountyUnclassifiable/Attainment
Dickson CountyUnclassifiable/Attainment
Dyer CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Fentress CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Gibson CountyUnclassifiable/Attainment
Giles CountyUnclassifiable/Attainment
Grainger CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Hamblen CountyUnclassifiable/Attainment
Hamilton County4/15/2015Unclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardeman CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Hawkins CountyUnclassifiable/Attainment
Haywood CountyUnclassifiable/Attainment
Henderson CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Hickman CountyUnclassifiable/Attainment
Houston CountyUnclassifiable/Attainment
Humphreys CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Knox CountyUnclassifiable/Attainment
Lake CountyUnclassifiable/Attainment
Lauderdale CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Lewis CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Loudon CountyUnclassifiable/Attainment
McMinn CountyUnclassifiable/Attainment
McNairy CountyUnclassifiable/Attainment
Macon CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Marion County4/15/2015Unclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Maury CountyUnclassifiable/Attainment
Meigs CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Moore CountyUnclassifiable/Attainment
Morgan CountyUnclassifiable/Attainment
Obion CountyUnclassifiable/Attainment
Overton CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Pickett CountyUnclassifiable/Attainment
Polk CountyUnclassifiable/Attainment
Putnam CountyUnclassifiable/Attainment
Rhea CountyUnclassifiable/Attainment
Roane CountyUnclassifiable/Attainment
Robertson CountyUnclassifiable/Attainment
Rutherford CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Sequatchie County4/15/2015Unclassifiable/Attainment
Sevier CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Smith CountyUnclassifiable/Attainment
Stewart CountyUnclassifiable/Attainment
Sullivan CountyUnclassifiable/Attainment
Sumner CountyUnclassifiable/Attainment
Tipton CountyUnclassifiable/Attainment
Trousdale CountyUnclassifiable/Attainment
Unicoi CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Van Buren CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Weakley CountyUnclassifiable/Attainment
White CountyUnclassifiable/Attainment
Williamson CountyUnclassifiable/Attainment
Wilson CountyUnclassifiable/Attainment

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

2 This date is June 19, 2017, unless otherwise noted.

Tennessee—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Anderson CountyUnclassifiable/Attainment.
Bedford CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bledsoe CountyUnclassifiable/Attainment.
Blount CountyUnclassifiable/Attainment.
Bradley CountyUnclassifiable/Attainment.
Campbell CountyUnclassifiable/Attainment.
Cannon CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Carter CountyUnclassifiable/Attainment.
Cheatham CountyUnclassifiable/Attainment.
Chester CountyUnclassifiable/Attainment.
Claiborne CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Cocke CountyUnclassifiable/Attainment.
Coffee CountyUnclassifiable/Attainment.
Crockett CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
Davidson CountyUnclassifiable/Attainment.
Decatur CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
Dickson CountyUnclassifiable/Attainment.
Dyer CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Fentress CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Gibson CountyUnclassifiable/Attainment.
Giles CountyUnclassifiable/Attainment.
Grainger CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Hamblen CountyUnclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardeman CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Hawkins CountyUnclassifiable/Attainment.
Haywood CountyUnclassifiable/Attainment.
Henderson CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Hickman CountyUnclassifiable/Attainment.
Houston CountyUnclassifiable/Attainment.
Humphreys CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Lake CountyUnclassifiable/Attainment.
Lauderdale CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lewis CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Loudon CountyUnclassifiable/Attainment.
McMinn CountyUnclassifiable/Attainment.
McNairy CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Maury CountyUnclassifiable/Attainment.
Meigs CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Moore CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
Obion CountyUnclassifiable/Attainment.
Overton CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pickett CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Rhea CountyUnclassifiable/Attainment.
Roane CountyUnclassifiable/Attainment.
The area described by U.S. Census 2000 block group identifier 47-145-0307-2.
Robertson CountyUnclassifiable/Attainment.
Rutherford CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Sequatchie CountyUnclassifiable/Attainment.
Sevier CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Smith CountyUnclassifiable/Attainment.
Stewart CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Sumner CountyUnclassifiable/Attainment.
Tipton CountyUnclassifiable/Attainment.
Trousdale CountyUnclassifiable/Attainment.
Unicoi CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Van Buren CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Weakley CountyUnclassifiable/Attainment.
White CountyUnclassifiable/Attainment.
Williamson CountyUnclassifiable/Attainment.
Wilson 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.

Tennessee—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date 2 Type
Knoxville-Sevierville-La Follette, TN:8/28/2017Attainment
Anderson CountyAttainment
Blount CountyAttainment
Knox CountyAttainment
Loudon CountyAttainment
Roane County (part)Attainment
The area described by U.S. Census 2000 block group identifier 47-145-0307-2.
Rest of State:
Bedford CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bledsoe CountyUnclassifiable/Attainment.
Bradley CountyUnclassifiable/Attainment.
Campbell CountyUnclassifiable/Attainment.
Cannon CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Carter CountyUnclassifiable/Attainment.
Cheatham CountyUnclassifiable/Attainment.
Chester CountyUnclassifiable/Attainment.
Claiborne CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Cocke CountyUnclassifiable/Attainment.
Coffee CountyUnclassifiable/Attainment.
Crockett CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
Davidson CountyUnclassifiable/Attainment.
Decatur CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
Dickson CountyUnclassifiable/Attainment.
Dyer CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Fentress CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Gibson CountyUnclassifiable/Attainment.
Giles CountyUnclassifiable/Attainment.
Grainger CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Hamblen CountyUnclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardeman CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Hawkins CountyUnclassifiable/Attainment.
Haywood CountyUnclassifiable/Attainment.
Henderson CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Hickman CountyUnclassifiable/Attainment.
Houston CountyUnclassifiable/Attainment.
Humphreys CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Lake CountyUnclassifiable/Attainment.
Lauderdale CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lewis CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
McMinn CountyUnclassifiable/Attainment.
McNairy CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Maury CountyUnclassifiable/Attainment.
Meigs CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Moore CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
Obion CountyUnclassifiable/Attainment.
Overton CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pickett CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Rhea CountyUnclassifiable/Attainment.
Roane County (remainder)Unclassifiable/Attainment.
Robertson CountyUnclassifiable/Attainment.
Rutherford CountyUnclassifiable/Attainment.
Scott County.Unclassifiable/Attainment.
Sequatchie CountyUnclassifiable/Attainment.
Sevier CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Smith CountyUnclassifiable/Attainment.
Stewart CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Sumner CountyUnclassifiable/Attainment.
Tipton CountyUnclassifiable/Attainment.
Trousdale CountyUnclassifiable/Attainment.
Unicoi CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Van Buren CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Weakley CountyUnclassifiable/Attainment.
White CountyUnclassifiable/Attainment.
Williamson CountyUnclassifiable/Attainment.
Wilson 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.

2 This date is July 2, 2014, unless otherwise noted.

Tennessee—NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards
Statewidex

Tennessee—NO2 (2010 1-Hour Standard)

Designated area Designation a
Date 1 Type
Bradley CountyUnclassifiable/Attainment.
Davidson CountyUnclassifiable/Attainment.
McMinn CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Rest of StateUnclassifiable/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.

Tennessee—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification
Date 1 Type Date 1 Type
Chattanooga, TN-GA-AL:
Hamilton County( 2)Attainment.
Meigs County( 2)Attainment.
Clarkesville-Hopkinsville, TN-KY:
Montgomery County11/21/2005Attainment
Johnson City-Kingsport-Bristol, TN:
Hawkins County( 2)Attainment.
Sullivan County( 2)Attainment.
Knoxville, TN:
Anderson CountyThis action is effective 3/8/2011Attainment
Blount CountyThis action is effective 3/8/2011Attainment
Cocke County (part)This action is effective 3/8/2011Attainment
(Great Smoky Mtn Park)
Jefferson CountyThis action is effective 3/8/2011Attainment
Knox CountyThis action is effective 3/8/2011Attainment
Loudon CountyThis action is effective 3/8/2011Attainment
Sevier CountyThis action is effective 3/8/2011Attainment.
Memphis, TN-AR: Shelby CountyJanuary 4, 2010Attainment
Nashville, TN:
Davidson County( 2)Attainment.
Rutherford County( 2)Attainment.
Sumner County( 2)Attainment.
Williamson County( 2)Attainment.
Wilson County( 2)Attainment.
Rest of StateUnclassifiable/Attainment
Bedford County
Benton County
Bledsoe County
Bradley County
Campbell County
Cannon County
Carroll County
Carter County
Cheatham County
Chester County
Claiborne County
Clay County
Cocke County (part) remainder
Coffee County
Crockett County
Cumberland County
Decatur County
DeKalb County
Dickson County
Dyer County
Fayette County
Fentress County
Franklin County
Gibson County
Giles County
Grainger County
Greene County
Grundy County
Hamblen County
Hancock County
Hardeman County
Hardin County
Haywood County
Henderson County
Henry County
Hickman County
Houston County
Humphreys County
Jackson County
Johnson County
Lake County
Lauderdale County
Lawrence County
Lewis County
Lincoln County
Macon County
Madison County
Marion County
Marshall County
Maury County
McMinn County
McNairy County
Monroe County
Moore County
Morgan County
Obion County
Overton County
Perry County
Pickett County
Polk County
Putnam County
Rhea County
Roane County
Robertson County
Scott County
Sequatchie County
Smith County
Stewart County
Tipton County
Trousdale County
Unicoi County
Union County
Van Buren County
Warren County
Washington County
Wayne County
Weakley County
White 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 Effective April 15, 2008.

Tennessee—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification
Date 1 Type Date 1 Type
Knoxville, TN 2This action is effective 7/13/2015Attainment
Anderson County (part):
2000 Census tracts: 202, 213.02
Blount County
Knox County
Memphis, TN-MS-AR: 2NonattainmentMarginal.
Shelby County6/23/2016Attainment
Rest of State: 3Unclassifiable/Attainment
Anderson County (part) remainderUnclassifiable/Attainment
Bedford CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Bledsoe CountyUnclassifiable/Attainment
Bradley CountyUnclassifiable/Attainment
Campbell CountyUnclassifiable/Attainment
Cannon CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Carter CountyUnclassifiable/Attainment
Cheatham CountyUnclassifiable/Attainment
Chester CountyUnclassifiable/Attainment
Claiborne CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Cocke CountyUnclassifiable/Attainment
Coffee CountyUnclassifiable/Attainment
Crockett CountyUnclassifiable/Attainment
Cumberland CountyUnclassifiable/Attainment
Davidson CountyUnclassifiable/Attainment
Decatur CountyUnclassifiable/Attainment
DeKalb CountyUnclassifiable/Attainment
Dickson CountyUnclassifiable/Attainment
Dyer CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Fentress CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Gibson CountyUnclassifiable/Attainment
Giles CountyUnclassifiable/Attainment
Grainger CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Hamblen CountyUnclassifiable/Attainment
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardeman CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Hawkins CountyUnclassifiable/Attainment
Haywood CountyUnclassifiable/Attainment
Henderson CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Hickman CountyUnclassifiable/Attainment
Houston CountyUnclassifiable/Attainment
Humphreys CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Lake CountyUnclassifiable/Attainment
Lauderdale CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Lewis CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Loudon CountyUnclassifiable/Attainment
McMinn CountyUnclassifiable/Attainment
McNairy CountyUnclassifiable/Attainment
Macon CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Maury CountyUnclassifiable/Attainment
Meigs CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Moore CountyUnclassifiable/Attainment
Morgan CountyUnclassifiable/Attainment
Obion CountyUnclassifiable/Attainment
Overton CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Pickett CountyUnclassifiable/Attainment
Polk CountyUnclassifiable/Attainment
Putnam CountyUnclassifiable/Attainment
Rhea CountyUnclassifiable/Attainment
Roane CountyUnclassifiable/Attainment
Robertson CountyUnclassifiable/Attainment
Rutherford CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Sequatchie CountyUnclassifiable/Attainment
Sevier CountyUnclassifiable/Attainment
Smith CountyUnclassifiable/Attainment
Stewart CountyUnclassifiable/Attainment
Sullivan CountyUnclassifiable/Attainment
Sumner CountyUnclassifiable/Attainment
Tipton CountyUnclassifiable/Attainment
Trousdale CountyUnclassifiable/Attainment
Unicoi CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Van Buren CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Weakley CountyUnclassifiable/Attainment
White CountyUnclassifiable/Attainment
Williamson CountyUnclassifiable/Attainment
Wilson CountyUnclassifiable/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.

Tennessee—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification
Date 2 Type Date Type
Anderson CountyAttainment/Unclassifiable
Bedford CountyAttainment/Unclassifiable
Benton CountyAttainment/Unclassifiable
Bledsoe CountyAttainment/Unclassifiable
Blount CountyAttainment/Unclassifiable
Bradley CountyAttainment/Unclassifiable
Campbell CountyAttainment/Unclassifiable
Cannon CountyAttainment/Unclassifiable
Carroll CountyAttainment/Unclassifiable
Carter CountyAttainment/Unclassifiable
Cheatham CountyAttainment/Unclassifiable
Chester CountyAttainment/Unclassifiable
Claiborne CountyAttainment/Unclassifiable
Clay CountyAttainment/Unclassifiable
Cocke CountyAttainment/Unclassifiable
Coffee CountyAttainment/Unclassifiable
Crockett CountyAttainment/Unclassifiable
Cumberland CountyAttainment/Unclassifiable
Davidson CountyAttainment/Unclassifiable
Decatur CountyAttainment/Unclassifiable
DeKalb CountyAttainment/Unclassifiable
Dickson CountyAttainment/Unclassifiable
Dyer CountyAttainment/Unclassifiable
Fayette CountyAttainment/Unclassifiable
Fentress CountyAttainment/Unclassifiable
Franklin CountyAttainment/Unclassifiable
Gibson CountyAttainment/Unclassifiable
Giles CountyAttainment/Unclassifiable
Grainger CountyAttainment/Unclassifiable
Greene CountyAttainment/Unclassifiable
Grundy CountyAttainment/Unclassifiable
Hamblen CountyAttainment/Unclassifiable
Hamilton CountyAttainment/Unclassifiable
Hancock CountyAttainment/Unclassifiable
Hardeman CountyAttainment/Unclassifiable
Hardin CountyAttainment/Unclassifiable
Hawkins CountyAttainment/Unclassifiable
Haywood CountyAttainment/Unclassifiable
Henderson CountyAttainment/Unclassifiable
Henry CountyAttainment/Unclassifiable
Hickman CountyAttainment/Unclassifiable
Houston CountyAttainment/Unclassifiable
Humphreys CountyAttainment/Unclassifiable
Jackson CountyAttainment/Unclassifiable
Jefferson CountyAttainment/Unclassifiable
Johnson CountyAttainment/Unclassifiable
Knox CountyAttainment/Unclassifiable
Lake CountyAttainment/Unclassifiable
Lauderdale CountyAttainment/Unclassifiable
Lawrence CountyAttainment/Unclassifiable
Lewis CountyAttainment/Unclassifiable
Lincoln CountyAttainment/Unclassifiable
Loudon CountyAttainment/Unclassifiable
McMinn CountyAttainment/Unclassifiable
McNairy CountyAttainment/Unclassifiable
Macon CountyAttainment/Unclassifiable
Madison CountyAttainment/Unclassifiable
Marion CountyAttainment/Unclassifiable
Marshall CountyAttainment/Unclassifiable
Maury CountyAttainment/Unclassifiable
Meigs CountyAttainment/Unclassifiable
Monroe CountyAttainment/Unclassifiable
Montgomery CountyAttainment/Unclassifiable
Moore CountyAttainment/Unclassifiable
Morgan CountyAttainment/Unclassifiable
Obion CountyAttainment/Unclassifiable
Overton CountyAttainment/Unclassifiable
Perry CountyAttainment/Unclassifiable
Pickett CountyAttainment/Unclassifiable
Polk CountyAttainment/Unclassifiable
Putnam CountyAttainment/Unclassifiable
Rhea CountyAttainment/Unclassifiable
Roane CountyAttainment/Unclassifiable
Robertson CountyAttainment/Unclassifiable
Rutherford CountyAttainment/Unclassifiable
Scott CountyAttainment/Unclassifiable
Sequatchie CountyAttainment/Unclassifiable
Sevier CountyAttainment/Unclassifiable
Shelby CountyAttainment/Unclassifiable
Smith CountyAttainment/Unclassifiable
Stewart CountyAttainment/Unclassifiable
Sullivan CountyAttainment/Unclassifiable
Sumner CountyAttainment/Unclassifiable
Tipton CountyAttainment/Unclassifiable
Trousdale CountyAttainment/Unclassifiable
Unicoi CountyAttainment/Unclassifiable
Union CountyAttainment/Unclassifiable
Van Buren CountyAttainment/Unclassifiable
Warren CountyAttainment/Unclassifiable
Washington CountyAttainment/Unclassifiable
Wayne CountyAttainment/Unclassifiable
Weakley CountyAttainment/Unclassifiable
White CountyAttainment/Unclassifiable
Williamson CountyAttainment/Unclassifiable
Wilson 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 January 16, 2018, unless otherwise noted.

Tennessee—1978 Lead NAAQS

Designated area Designation Classification
Date Type Date Type
Shelby County (part)7/2/2001Attainment
Area encompassed by a circle with a 3/4 mile radius with center being the intersection of Castex and Mallory Avenue, Memphis, TN.
Williamson County (part)9/10/1999Attainment
Area encompassed by a circle centered on Universal Transverse Mercator coordinate 530.38 E, 3961.60 N (Zone 16) with a radius of 1.5 kilometers.
Fayette County (part)10/17/1995Attainment
Area encompassed by a circle centered on Universal Transverse Mercator coordinate 267.59 E, 3881.30 N (Zone 16) with a radius of 1.0 kilometers.
Rest of State Not Designated

Tennessee—2008 Lead NAAQS

Designated area Designation for the 2008 NAAQS a
Date 1 Type
Bristol, TN:
Sullivan County (part)7/7/2016Attainment.
Area is bounded by a 1.25 km radius surrounding the UTM coordinates 4042923 meters E., 386267 meters N., Zone 17, which surrounds the Exide Technologies Facility.
Knox County, TN:
Knox CountyUnclassifiable.
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:For Federal Register citations affecting § 81.343, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.
authority: 42 U.S.C. 7401,
source: 36 FR 22421, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 81.343
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