Regulations last checked for updates: Feb 06, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
All TitlesTitle 40Chapter IPart 81Subpart C - Subpart C—Section 107 Attainment Status Designations
View all text of Subpart C [§ 81.300 - § 81.356]
§ 81.325 - Mississippi.

Mississippi—TSP

Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
Adams CountyX
Alcorn CountyX
Amite CountyX
Attala CountyX
Benton CountyX
Bolivar CountyX
Calhoun CountyX
Carroll CountyX
Chickasaw CountyX
Choctaw CountyX
Clairborne CountyX
Clarke CountyX
Clay CountyX
Coahoma CountyX
Copiah CountyX
Covington CountyX
DeSoto CountyX
Forrest CountyX
Franklin CountyX
George CountyX
Greene CountyX
Grenada CountyX
Hancock CountyX
Harrison CountyX
Hinds CountyX
Holmes CountyX
Humphreys CountyX
Issaquena CountyX
Ittawamba CountyX
Jackson CountyX
Jasper CountyX
Jefferson CountyX
Jefferson Davis CountyX
Jones CountyX
Kemper CountyX
Lafayette CountyX
Lamar CountyX
Lauderdale CountyX
Lawerence CountyX
Leake CountyX
Lee CountyX
Leflore CountyX
Lincoln CountyX
Lowndes CountyX
Madison CountyX
Marion CountyX
Marshall CountyX
Monroe CountyX
Montgomery CountyX
Neshoba CountyX
Newton CountyX
Noxubee CountyX
Oktibbeha CountyX
Panola CountyX
Pearl River CountyX
Perry CountyX
Pike CountyX
Pontotoc CountyX
Prentiss CountyX
Quitman CountyX
Rankin CountyX
Scott CountyX
Sharkey CountyX
Simpson CountyX
Smith CountyX
Stone CountyX
Sunflower CountyX
Tallahatchie CountyX
Tate CountyX
Tippah CountyX
Tishomingo CountyX
Tunica CountyX
Union CountyX
Walthall CountyX
Warren CountyX
Washington CountyX
Wayne CountyX
Webster CountyX
Wilkinson CountyX
Winston CountyX
Yalobusha CountyX
Yazoo CountyX

Mississippi—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
Adams CountyX
Alcorn CountyX
Amite CountyX
Attala CountyX
Benton CountyX
Bolivar CountyX
Calhoun CountyX
Carroll CountyX
Chickasaw CountyX
Choctaw CountyX
Clairborne CountyX
Clarke CountyX
Clay CountyX
Coahoma CountyX
Copiah CountyX
Covington CountyX
DeSoto CountyX
Forest CountyX
Franklin CountyX
George CountyX
Greene CountyX
Grenada CountyX
Hancock CountyX
Harrison CountyX
Hinds CountyX
Holmes CountyX
Humphreys CountyX
Issaquena CountyX
Ittawamba CountyX
Jackson CountyX
Jasper CountyX
Jefferson CountyX
Jefferson Davis CountyX
Jones CountyX
Kemper CountyX
Lafayette CountyX
Lamar CountyX
Lauderdale CountyX
Lawrence CountyX
Leake CountyX
Lee CountyX
Leflore CountyX
Lincoln CountyX
Lowndes CountyX
Madison CountyX
Marion CountyX
Marshall CountyX
Monroe CountyX
Montgomery CountyX
Neshoba CountyX
Newton CountyX
Noxubee CountyX
Oktibbeha CountyX
Panola CountyX
Pearl River CountyX
Perry CountyX
Pike CountyX
Pontotoc CountyX
Prentiss CountyX
Quitman CountyX
Rankin CountyX
Scott CountyX
Sharkey CountyX
Simpson CountyX
Smith CountyX
Stone CountyX
Sunflower CountyX
Tallahatchie CountyX
Tate CountyX
Tippah CountyX
Tishomingo CountyX
Tunica CountyX
Union CountyX
Walthall CountyX
Warren CountyX
Washington CountyX
Wayne CountyX
Webster CountyX
Wilkinson CountyX
Winston CountyX
Yalobusha CountyX
Yazoo CountyX

Mississippi—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1 Designation
Date 2 Type
Adams CountyAttainment/Unclassifiable.
Alcorn CountyAttainment/Unclassifiable.
Amite CountyAttainment/Unclassifiable.
Attala CountyAttainment/Unclassifiable.
Benton CountyAttainment/Unclassifiable.
Bolivar CountyAttainment/Unclassifiable.
Calhoun CountyAttainment/Unclassifiable.
Carroll CountyAttainment/Unclassifiable.
Chickasaw CountyAttainment/Unclassifiable.
Choctaw CountyAttainment/Unclassifiable.
Claiborne CountyAttainment/Unclassifiable.
Clarke CountyAttainment/Unclassifiable.
Clay CountyAttainment/Unclassifiable.
Coahoma CountyAttainment/Unclassifiable.
Copiah CountyAttainment/Unclassifiable.
Covington CountyAttainment/Unclassifiable.
DeSoto CountyAttainment/Unclassifiable.
Forrest CountyAttainment/Unclassifiable.
Franklin CountyAttainment/Unclassifiable.
George CountyAttainment/Unclassifiable.
Greene CountyAttainment/Unclassifiable.
Grenada CountyAttainment/Unclassifiable.
Hancock CountyAttainment/Unclassifiable.
Harrison CountyAttainment/Unclassifiable.
Hinds CountyAttainment/Unclassifiable.
Holmes CountyAttainment/Unclassifiable.
Humphreys CountyAttainment/Unclassifiable.
Issaquena CountyAttainment/Unclassifiable.
Itawamba CountyAttainment/Unclassifiable.
Jackson CountyAttainment/Unclassifiable.
Jasper CountyAttainment/Unclassifiable.
Jefferson CountyAttainment/Unclassifiable.
Jefferson Davis CountyAttainment/Unclassifiable.
Jones CountyAttainment/Unclassifiable.
Kemper CountyAttainment/Unclassifiable.
Lafayette CountyAttainment/Unclassifiable.
Lamar County, MS9/12/2016Attainment/Unclassifiable.
Lauderdale CountyAttainment/Unclassifiable.
Lawrence CountyAttainment/Unclassifiable.
Leake CountyAttainment/Unclassifiable.
Lee CountyAttainment/Unclassifiable.
Leflore CountyAttainment/Unclassifiable.
Lincoln CountyAttainment/Unclassifiable.
Lowndes CountyAttainment/Unclassifiable.
Madison CountyAttainment/Unclassifiable.
Marion CountyAttainment/Unclassifiable.
Marshall CountyAttainment/Unclassifiable.
Monroe CountyAttainment/Unclassifiable.
Montgomery CountyAttainment/Unclassifiable.
Neshoba CountyAttainment/Unclassifiable.
Newton CountyAttainment/Unclassifiable.
Noxubee CountyAttainment/Unclassifiable.
Oktibbeha CountyAttainment/Unclassifiable.
Panola CountyAttainment/Unclassifiable.
Pearl River CountyAttainment/Unclassifiable.
Perry CountyAttainment/Unclassifiable.
Pike CountyAttainment/Unclassifiable.
Pontotoc CountyAttainment/Unclassifiable.
Prentiss CountyAttainment/Unclassifiable.
Quitman CountyAttainment/Unclassifiable.
Rankin CountyAttainment/Unclassifiable.
Scott CountyAttainment/Unclassifiable.
Sharkey CountyAttainment/Unclassifiable.
Simpson CountyAttainment/Unclassifiable.
Smith CountyAttainment/Unclassifiable.
Stone CountyAttainment/Unclassifiable.
Sunflower CountyAttainment/Unclassifiable.
Tallahatchie CountyAttainment/Unclassifiable.
Tate CountyAttainment/Unclassifiable.
Tippah CountyAttainment/Unclassifiable.
Tishomingo CountyAttainment/Unclassifiable.
Tunica CountyAttainment/Unclassifiable.
Union CountyAttainment/Unclassifiable.
Walthall CountyAttainment/Unclassifiable.
Warren CountyAttainment/Unclassifiable.
Washington CountyAttainment/Unclassifiable.
Wayne CountyAttainment/Unclassifiable.
Webster CountyAttainment/Unclassifiable.
Wilkinson CountyAttainment/Unclassifiable.
Winston CountyAttainment/Unclassifiable.
Yalobusha CountyAttainment/Unclassifiable.
Yazoo 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.

Mississippi—Carbon Monoxide

Designated Area Designation Classification
Date 1 Type Date 1 Type
StatewideUnclassifiable/Attainment
Adams County
Alcorn County
Amite County
Attala County
Benton County
Bolivar County
Calhoun County
Carroll County
Chickasaw County
Choctaw County
Claiborne County
Clarke County
Clay County
Coahoma County
Copiah County
Covington County
DeSoto County
Forrest County
Franklin County
George County
Greene County
Grenada County
Hancock County
Harrison County
Hinds County
Holmes County
Humphreys County
Issaquena County
Itawamba County
Jackson County
Jasper County
Jefferson County
Jefferson Davis County
Jones County
Kemper County
Lafayette County
Lamar County
Lauderdale County
Lawrence County
Leake County
Lee County
Leflore County
Lincoln County
Lowndes County
Madison County
Marion County
Marshall County
Monroe County
Montgomery County
Neshoba County
Newton County
Noxubee County
Oktibbeha County
Panola County
Pearl River County
Perry County
Pike County
Pontotoc County
Prentiss County
Quitman County
Rankin County
Scott County
Sharkey County
Simpson County
Smith County
Stone County
Sunflower County
Tallahatchie County
Tate County
Tippah County
Tishomingo County
Tunica County
Union County
Walthall County
Warren County
Washington County
Wayne County
Webster County
Wilkinson County
Winston County
Yalobusha County
Yazoo County

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

Mississippi—Ozone (1-Hour Standard) 2

Designated area Designation Classification
Date 1 Type Date 1 Type
Memphis:
De Soto County11/15/1990Unclassifiable/Attainment11/15/90
StatewideUnclassifiable/Attainment
Adams County
Alcorn County
Amite County
Attala County
Benton County
Bolivar County
Calhoun County
Carroll County
Chickasaw County
Choctaw County
Claiborne County
Clarke County
Clay County
Coahoma County
Copiah County
Covington County
Forrest County
Franklin County
George County
Greene County
Grenada County
Hancock County
Harrison County
Hinds County
Holmes County
Humphreys County
Issaquena County
Itawamba County
Jackson County
Jasper County
Jefferson County
Jefferson Davis County
Jones County
Kemper County
Lafayette County
Lamar County
Lauderdale County
Lawrence County
Leake County
Lee County
Leflore County
Lincoln County
Lowndes County
Madison County
Marion County
Marshall County
Monroe County
Montgomery County
Neshoba County
Newton County
Noxubee County
Oktibbeha County
Panola County
Pearl River County
Perry County
Pike County
Pontotoc County
Prentiss County
Quitman County
Rankin County
Scott County
Sharkey County
Simpson County
Smith County
Stone County
Sunflower County
Tallahatchie County
Tate County
Tippah County
Tishomingo County
Tunica County
Union County
Walthall County
Warren County
Washington County
Wayne County
Webster County
Wilkinson County
Winston County
Yalobusha County
Yazoo 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 Mississippi.

Mississippi—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Adams CountyUnclassifiable/Attainment.
Alcorn CountyUnclassifiable/Attainment.
Amite CountyUnclassifiable/Attainment.
Attala CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bolivar CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Chickasaw CountyUnclassifiable/Attainment.
Choctaw CountyUnclassifiable/Attainment.
Claiborne CountyUnclassifiable/Attainment.
Clarke CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Coahoma CountyUnclassifiable/Attainment.
Copiah CountyUnclassifiable/Attainment.
Covington CountyUnclassifiable/Attainment.
DeSoto CountyUnclassifiable/Attainment.
Forrest CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
George CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grenada CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Hinds CountyUnclassifiable/Attainment.
Holmes CountyUnclassifiable/Attainment.
Humphreys CountyUnclassifiable/Attainment.
Issaquena CountyUnclassifiable/Attainment.
Itawamba CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jefferson Davis CountyUnclassifiable/Attainment.
Jones CountyUnclassifiable/Attainment.
Kemper CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lamar CountyUnclassifiable/Attainment.
Lauderdale CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Leake CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Leflore CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Lowndes CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Neshoba CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Noxubee CountyUnclassifiable/Attainment.
Oktibbeha CountyUnclassifiable/Attainment.
Panola CountyUnclassifiable/Attainment.
Pearl River CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pontotoc CountyUnclassifiable/Attainment.
Prentiss CountyUnclassifiable/Attainment.
Quitman CountyUnclassifiable/Attainment.
Rankin CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Sharkey CountyUnclassifiable/Attainment.
Simpson CountyUnclassifiable/Attainment.
Smith CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sunflower CountyUnclassifiable/Attainment.
Tallahatchie CountyUnclassifiable/Attainment.
Tate CountyUnclassifiable/Attainment.
Tippah CountyUnclassifiable/Attainment.
Tishomingo CountyUnclassifiable/Attainment.
Tunica CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Walthall CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Wilkinson CountyUnclassifiable/Attainment.
Winston CountyUnclassifiable/Attainment.
Yalobusha CountyUnclassifiable/Attainment.
Yazoo 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.

Mississippi—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Statewide:
Adams CountyUnclassifiable/Attainment
Alcorn CountyUnclassifiable/Attainment
Amite CountyUnclassifiable/Attainment
Attala CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Bolivar CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Chickasaw CountyUnclassifiable/Attainment
Choctaw CountyUnclassifiable/Attainment
Claiborne CountyUnclassifiable/Attainment
Clarke CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Coahoma CountyUnclassifiable/Attainment
Copiah CountyUnclassifiable/Attainment
Covington CountyUnclassifiable/Attainment
DeSoto CountyUnclassifiable/Attainment
Forrest CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
George CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grenada CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Harrison CountyUnclassifiable/Attainment
Hinds CountyUnclassifiable/Attainment
Holmes CountyUnclassifiable/Attainment
Humphreys CountyUnclassifiable/Attainment
Issaquena CountyUnclassifiable/Attainment
Itawamba CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Jefferson Davis CountyUnclassifiable/Attainment
Jones CountyUnclassifiable/Attainment
Kemper CountyUnclassifiable/Attainment
Lafayette CountyUnclassifiable/Attainment
Lamar CountyUnclassifiable/Attainment
Lauderdale CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Leake CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Leflore CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Lowndes CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Neshoba CountyUnclassifiable/Attainment
Newton CountyUnclassifiable/Attainment
Noxubee CountyUnclassifiable/Attainment
Oktibbeha CountyUnclassifiable/Attainment
Panola CountyUnclassifiable/Attainment
Pearl River CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Pike CountyUnclassifiable/Attainment
Pontotoc CountyUnclassifiable/Attainment
Prentiss CountyUnclassifiable/Attainment
Quitman CountyUnclassifiable/Attainment
Rankin CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Sharkey CountyUnclassifiable/Attainment
Simpson CountyUnclassifiable/Attainment
Smith CountyUnclassifiable/Attainment
Stone CountyUnclassifiable/Attainment
Sunflower CountyUnclassifiable/Attainment
Tallahatchie CountyUnclassifiable/Attainment
Tate CountyUnclassifiable/Attainment
Tippah CountyUnclassifiable/Attainment
Tishomingo CountyUnclassifiable/Attainment
Tunica CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Walthall CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Webster CountyUnclassifiable/Attainment
Wilkinson CountyUnclassifiable/Attainment
Winston CountyUnclassifiable/Attainment
Yalobusha CountyUnclassifiable/Attainment
Yazoo 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.

Mississippi—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Adams CountyUnclassifiable/Attainment.
Alcorn CountyUnclassifiable/Attainment.
Amite CountyUnclassifiable/Attainment.
Attala CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bolivar CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Chickasaw CountyUnclassifiable/Attainment.
Choctaw CountyUnclassifiable/Attainment.
Claiborne CountyUnclassifiable/Attainment.
Clarke CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Coahoma CountyUnclassifiable/Attainment.
Copiah CountyUnclassifiable/Attainment.
Covington CountyUnclassifiable/Attainment.
DeSoto CountyUnclassifiable/Attainment.
Forrest CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
George CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grenada CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Hinds CountyUnclassifiable/Attainment.
Holmes CountyUnclassifiable/Attainment.
Humphreys CountyUnclassifiable/Attainment.
Issaquena CountyUnclassifiable/Attainment.
Itawamba CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jefferson Davis CountyUnclassifiable/Attainment.
Jones CountyUnclassifiable/Attainment.
Kemper CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lamar CountyUnclassifiable/Attainment.
Lauderdale CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Leake CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Leflore CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Lowndes CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Neshoba CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Noxubee CountyUnclassifiable/Attainment.
Oktibbeha CountyUnclassifiable/Attainment.
Panola CountyUnclassifiable/Attainment.
Pearl River CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pontotoc CountyUnclassifiable/Attainment.
Prentiss CountyUnclassifiable/Attainment.
Quitman CountyUnclassifiable/Attainment.
Rankin CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Sharkey CountyUnclassifiable/Attainment.
Simpson CountyUnclassifiable/Attainment.
Smith CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sunflower CountyUnclassifiable/Attainment.
Tallahatchie CountyUnclassifiable/Attainment.
Tate CountyUnclassifiable/Attainment.
Tippah CountyUnclassifiable/Attainment.
Tishomingo CountyUnclassifiable/Attainment.
Tunica CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Walthall CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Wilkinson CountyUnclassifiable/Attainment.
Winston CountyUnclassifiable/Attainment.
Yalobusha CountyUnclassifiable/Attainment.
Yazoo 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.

Mississippi—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Adams CountyUnclassifiable/Attainment.
Alcorn CountyUnclassifiable/Attainment.
Amite CountyUnclassifiable/Attainment.
Attala CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bolivar CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Chickasaw CountyUnclassifiable/Attainment.
Choctaw CountyUnclassifiable/Attainment.
Claiborne CountyUnclassifiable/Attainment.
Clarke CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Coahoma CountyUnclassifiable/Attainment.
Copiah CountyUnclassifiable/Attainment.
Covington CountyUnclassifiable/Attainment.
DeSoto CountyUnclassifiable/Attainment.
Forrest CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
George CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grenada CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Hinds CountyUnclassifiable/Attainment.
Holmes CountyUnclassifiable/Attainment.
Humphreys CountyUnclassifiable/Attainment.
Issaquena CountyUnclassifiable/Attainment.
Itawamba CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jefferson Davis CountyUnclassifiable/Attainment.
Jones CountyUnclassifiable/Attainment.
Kemper CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lamar CountyUnclassifiable/Attainment.
Lauderdale CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Leake CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Leflore CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Lowndes CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Neshoba CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Noxubee CountyUnclassifiable/Attainment.
Oktibbeha CountyUnclassifiable/Attainment.
Panola CountyUnclassifiable/Attainment.
Pearl River CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pontotoc CountyUnclassifiable/Attainment.
Prentiss CountyUnclassifiable/Attainment.
Quitman CountyUnclassifiable/Attainment.
Rankin CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Sharkey CountyUnclassifiable/Attainment.
Simpson CountyUnclassifiable/Attainment.
Smith CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sunflower CountyUnclassifiable/Attainment.
Tallahatchie CountyUnclassifiable/Attainment.
Tate CountyUnclassifiable/Attainment.
Tippah CountyUnclassifiable/Attainment.
Tishomingo CountyUnclassifiable/Attainment.
Tunica CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Walthall CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Wilkinson CountyUnclassifiable/Attainment.
Winston CountyUnclassifiable/Attainment.
Yalobusha CountyUnclassifiable/Attainment.
Yazoo 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.

Mississippi—NO2 (1971 Annual Standard)

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

Mississippi—NO2 (2010 1-Hour Standard)

Designated area Designation a
Date 1 Type
Adams CountyUnclassifiable/Attainment.
Alcorn CountyUnclassifiable/Attainment.
Amite CountyUnclassifiable/Attainment.
Attala CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bolivar CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Chickasaw CountyUnclassifiable/Attainment.
Choctaw CountyUnclassifiable/Attainment.
Claiborne CountyUnclassifiable/Attainment.
Clarke CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Coahoma CountyUnclassifiable/Attainment.
Copiah CountyUnclassifiable/Attainment.
Covington CountyUnclassifiable/Attainment.
DeSoto CountyUnclassifiable/Attainment.
Forrest CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
George CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grenada CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Hinds CountyUnclassifiable/Attainment.
Holmes CountyUnclassifiable/Attainment.
Humphreys CountyUnclassifiable/Attainment.
Issaquena CountyUnclassifiable/Attainment.
Itawamba CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jefferson Davis CountyUnclassifiable/Attainment.
Jones CountyUnclassifiable/Attainment.
Kemper CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lamar CountyUnclassifiable/Attainment.
Lauderdale CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Leake CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Leflore CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Lowndes CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Neshoba CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Noxubee CountyUnclassifiable/Attainment.
Oktibbeha CountyUnclassifiable/Attainment.
Panola CountyUnclassifiable/Attainment.
Pearl River CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pontotoc CountyUnclassifiable/Attainment.
Prentiss CountyUnclassifiable/Attainment.
Quitman CountyUnclassifiable/Attainment.
Rankin CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Sharkey CountyUnclassifiable/Attainment.
Simpson CountyUnclassifiable/Attainment.
Smith CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sunflower CountyUnclassifiable/Attainment.
Tallahatchie CountyUnclassifiable/Attainment.
Tate CountyUnclassifiable/Attainment.
Tippah CountyUnclassifiable/Attainment.
Tishomingo CountyUnclassifiable/Attainment.
Tunica CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Walthall CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Wilkinson CountyUnclassifiable/Attainment.
Winston CountyUnclassifiable/Attainment.
Yalobusha CountyUnclassifiable/Attainment.
Yazoo 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.

Mississippi—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification
Date 1 Type Date 1 Type
StatewideUnclassifiable/Attainment.
Adams County
Alcorn County
Amite County
Attala County
Benton County
Bolivar County
Calhoun County
Carroll County
Chickasaw County
Choctaw County
Claiborne County
Clarke County
Clay County
Coahoma County
Copiah County
Covington County
DeSoto County
Forrest County
Franklin County
George County
Greene County
Grenada County
Hancock County
Harrison County
Hinds County
Holmes County
Humphreys County
Issaquena County
Itawamba County
Jackson County
Jasper County
Jefferson County
Jefferson Davis County
Jones County
Kemper County
Lafayette County
Lamar County
Lauderdale County
Lawrence County
Leake County
Lee County
Leflore County
Lincoln County
Lowndes County
Madison County
Marion County
Marshall County
Monroe County
Montgomery County
Neshoba County
Newton County
Noxubee County
Oktibbeha County
Panola County
Pearl River County
Perry County
Pike County
Pontotoc County
Prentiss County
Quitman County
Rankin County
Scott County
Sharkey County
Simpson County
Smith County
Stone County
Sunflower County
Tallahatchie County
Tate County
Tippah County
Tishomingo County
Tunica County
Union County
Walthall County
Warren County
Washington County
Wayne County
Webster County
Wilkinson County
Winston County
Yalobusha County
Yazoo 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.

Mississippi—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification
Date 1 Type Date 1 Type
Memphis, TN-MS-AR: 2
DeSoto County (part) Portion along MPO Lines4/8/2016Attainment
Rest of State: 3
Adams CountyUnclassifiable/Attainment
Alcorn CountyUnclassifiable/Attainment
Amite CountyUnclassifiable/Attainment
Attala CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Bolivar CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Chickasaw CountyUnclassifiable/Attainment
Choctaw CountyUnclassifiable/Attainment
Claiborne CountyUnclassifiable/Attainment
Clarke CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment.
Coahoma CountyUnclassifiable/Attainment
Copiah CountyUnclassifiable/Attainment
Covington CountyUnclassifiable/Attainment
DeSoto County (remainder)Unclassifiable/Attainment
Forrest CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
George CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grenada CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Harrison CountyUnclassifiable/Attainment
Hinds CountyUnclassifiable/Attainment
Holmes CountyUnclassifiable/Attainment
Humphreys CountyUnclassifiable/Attainment
Issaquena CountyUnclassifiable/Attainment
Itawamba CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Jefferson Davis CountyUnclassifiable/Attainment
Jones CountyUnclassifiable/Attainment
Kemper CountyUnclassifiable/Attainment
Lafayette CountyUnclassifiable/Attainment
Lamar CountyUnclassifiable/Attainment
Lauderdale CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Leake CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Leflore CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Lowndes CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Neshoba CountyUnclassifiable/Attainment
Newton CountyUnclassifiable/Attainment
Noxubee CountyUnclassifiable/Attainment
Oktibbeha CountyUnclassifiable/Attainment
Panola CountyUnclassifiable/Attainment
Pearl River CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Pike CountyUnclassifiable/Attainment
Pontotoc CountyUnclassifiable/Attainment
Prentiss CountyUnclassifiable/Attainment
Quitman CountyUnclassifiable/Attainment
Rankin CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Sharkey CountyUnclassifiable/Attainment
Simpson CountyUnclassifiable/Attainment
Smith CountyUnclassifiable/Attainment
Stone CountyUnclassifiable/Attainment
Sunflower CountyUnclassifiable/Attainment
Tallahatchie CountyUnclassifiable/Attainment
Tate County.Unclassifiable/Attainment
Tippah CountyUnclassifiable/Attainment
Tishomingo CountyUnclassifiable/Attainment
Tunica CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Walthall CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Webster CountyUnclassifiable/Attainment
Wilkinson CountyUnclassifiable/Attainment
Winston CountyUnclassifiable/Attainment
Yalobusha CountyUnclassifiable/Attainment
Yazoo 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.

Mississippi—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification
Date 2 Type Date Type
Adams CountyAttainment/Unclassifiable
Alcorn CountyAttainment/Unclassifiable
Amite CountyAttainment/Unclassifiable
Attala CountyAttainment/Unclassifiable
Benton CountyAttainment/Unclassifiable
Bolivar CountyAttainment/Unclassifiable
Calhoun CountyAttainment/Unclassifiable
Carroll CountyAttainment/Unclassifiable
Chickasaw CountyAttainment/Unclassifiable
Choctaw CountyAttainment/Unclassifiable
Claiborne CountyAttainment/Unclassifiable
Clarke CountyAttainment/Unclassifiable
Clay CountyAttainment/Unclassifiable
Coahoma CountyAttainment/Unclassifiable
Copiah CountyAttainment/Unclassifiable
Covington CountyAttainment/Unclassifiable
DeSoto CountyAttainment/Unclassifiable
Forrest CountyAttainment/Unclassifiable
Franklin CountyAttainment/Unclassifiable
George CountyAttainment/Unclassifiable
Greene CountyAttainment/Unclassifiable
Grenada CountyAttainment/Unclassifiable
Hancock CountyAttainment/Unclassifiable
Harrison CountyAttainment/Unclassifiable
Hinds CountyAttainment/Unclassifiable
Holmes CountyAttainment/Unclassifiable
Humphreys CountyAttainment/Unclassifiable
Issaquena CountyAttainment/Unclassifiable
Itawamba CountyAttainment/Unclassifiable
Jackson CountyAttainment/Unclassifiable
Jasper CountyAttainment/Unclassifiable
Jefferson CountyAttainment/Unclassifiable
Jefferson Davis CountyAttainment/Unclassifiable
Jones CountyAttainment/Unclassifiable
Kemper CountyAttainment/Unclassifiable
Lafayette CountyAttainment/Unclassifiable
Lamar CountyAttainment/Unclassifiable
Lauderdale CountyAttainment/Unclassifiable
Lawrence CountyAttainment/Unclassifiable
Leake CountyAttainment/Unclassifiable
Lee CountyAttainment/Unclassifiable
Leflore CountyAttainment/Unclassifiable
Lincoln CountyAttainment/Unclassifiable
Lowndes CountyAttainment/Unclassifiable
Madison CountyAttainment/Unclassifiable
Marion CountyAttainment/Unclassifiable
Marshall CountyAttainment/Unclassifiable
Monroe CountyAttainment/Unclassifiable
Montgomery CountyAttainment/Unclassifiable
Neshoba CountyAttainment/Unclassifiable
Newton CountyAttainment/Unclassifiable
Noxubee CountyAttainment/Unclassifiable
Oktibbeha CountyAttainment/Unclassifiable
Panola CountyAttainment/Unclassifiable
Pearl River CountyAttainment/Unclassifiable
Perry CountyAttainment/Unclassifiable
Pike CountyAttainment/Unclassifiable
Pontotoc CountyAttainment/Unclassifiable
Prentiss CountyAttainment/Unclassifiable
Quitman CountyAttainment/Unclassifiable
Rankin CountyAttainment/Unclassifiable
Scott CountyAttainment/Unclassifiable
Sharkey CountyAttainment/Unclassifiable
Simpson CountyAttainment/Unclassifiable
Smith CountyAttainment/Unclassifiable
Stone CountyAttainment/Unclassifiable
Sunflower CountyAttainment/Unclassifiable
Tallahatchie CountyAttainment/Unclassifiable
Tate CountyAttainment/Unclassifiable
Tippah CountyAttainment/Unclassifiable
Tishomingo CountyAttainment/Unclassifiable
Tunica CountyAttainment/Unclassifiable
Union CountyAttainment/Unclassifiable
Walthall CountyAttainment/Unclassifiable
Warren CountyAttainment/Unclassifiable
Washington CountyAttainment/Unclassifiable
Wayne CountyAttainment/Unclassifiable
Webster CountyAttainment/Unclassifiable
Wilkinson CountyAttainment/Unclassifiable
Winston CountyAttainment/Unclassifiable
Yalobusha CountyAttainment/Unclassifiable
Yazoo 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.

Mississippi—2008 Lead NAAQS

Designated area Designation for the 2008 NAAQS a
Date 1 Type
Whole 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 § 81.325, 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 81.325
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