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]
§ 81.326 - Missouri.

Missouri—TSP

Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
St. Louis AQCR (070):
St. Louis (an area extending west about 2 miles from the Mississippi River, north to near I-270 and south to about 1 mile beyond the city limitsX
Remainder of the city of St. LouisX
Remainder of AQCRX
Kansas City AQCR (094):
Kansas City (an area extending approximately from the Kansas state line east along Red Bridge Road and 115th Street to Missouri Highway 291, then north to I-70, east to Missouri Highway 7, north to U.S. Highway 24 west to Missouri Highway 291, north to Missouri Highway 152, west to Missouri Highway 9, south to U.S. Highway FF, and due south to the state line)X
St. Joseph: Within city limitsX
Remainder of AQCRX
Northern AQCR (137): Mexico (township 51 north, range 9 west)X
Remainder of AQCRX
Southeastern AQCR (138)X
Remainder of AQCRX
Southwestern AQCR (139)X

1 EPA designation replaces State designation.

Missouri—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
Northern AQCR (137):
Pike CountyX
Ralls CountyX
Remainder of AQCRX
Remainder of StateX

Missouri—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1 Designation
Date 2 Type
Jackson County, MO3/2/2022Attainment.
Jackson County (part).
The portion of Jackson County bounded by I-70/I-670 and the Missouri River to the north; and, to the west of I-435 to the state line separating Missouri and Kansas
Jefferson County, MO2/28/2022Attainment.
Jefferson County (part)
That portion within Jefferson County described by connecting the following four sets of UTM coordinates moving in a clockwise manner:
(Herculaneum USGS Quadrangle), 718360.283, 4250477.056, 729301.869, 4250718.415, 729704.134, 4236840.30, 718762.547, 4236558.715
(Festus USGS Quadrangle), 718762.547, 4236558.715, 729704.134, 4236840.30, 730066.171, 4223042.637, 719124.585, 4222680.6
(Selma USGS Quadrangle), 729704.134, 4236840.30, 730428.209, 4236840.3, 741047.984, 4223283.996, 730066.171, 4223042.637
(Valmeyer USGS Quadrangle), 729301.869, 4250718.415, 731474.096, 4250798.868, 730428.209, 4236840.3, 729704.134, 4236840.30
New Madrid County, MO4/30/2021Nonattainment.
New Madrid County (part).
Area bounded by: East: Missouri/Kentucky and Missouri/Tennessee State lines. North: County Highway 406 East to Levee Road, following Levee Road North to County Highway 406, then extending directly East to the Missouri/Kentucky State line. West: County Highway 403 South: County Highway 408 East to the intersection with County Highway 431, then extending directly East to the Missouri/Tennessee State line.
Franklin-St. Charles Counties, MO9/12/2016Unclassifiable.
Franklin County (part)
The eastern and western boundaries are Boles Township boundaries. The northern boundary is the Franklin County-St. Charles County Line. The southern boundary is Interstate 44.
St. Charles County (part)
The eastern and western boundaries are Boone Township boundaries. The northern boundary is Missouri Route D and Highway 94. The southern boundary is the Franklin County-St. Charles County Line.
Jackson County, MO9/12/2016Unclassifiable.
Jackson County (part)
The northern boundary is the county line separating Jackson County from Clay and Ray Counties. The eastern boundary is the county line separating Jackson County from Lafayette County. The southern boundary is Interstates 70 and 470. The western boundary is Missouri Highway 291.
Adair CountyAttainment/Unclassifiable.
Andrew CountyAttainment/Unclassifiable.
Atchison CountyAttainment/Unclassifiable.
Audrain CountyAttainment/Unclassifiable.
Barry CountyAttainment/Unclassifiable.
Barton CountyAttainment/Unclassifiable.
Bates CountyAttainment/Unclassifiable.
Benton CountyAttainment/Unclassifiable.
Bollinger CountyAttainment/Unclassifiable.
Boone CountyAttainment/Unclassifiable.
Buchanan CountyAttainment/Unclassifiable.
Butler CountyAttainment/Unclassifiable.
Caldwell CountyAttainment/Unclassifiable.
Callaway CountyAttainment/Unclassifiable.
Camden CountyAttainment/Unclassifiable.
Cape Girardeau CountyAttainment/Unclassifiable.
Carroll CountyAttainment/Unclassifiable.
Carter CountyAttainment/Unclassifiable.
Cass CountyAttainment/Unclassifiable.
Cedar CountyAttainment/Unclassifiable.
Chariton CountyAttainment/Unclassifiable.
Christian CountyAttainment/Unclassifiable.
Clark CountyAttainment/Unclassifiable.
Clay CountyAttainment/Unclassifiable.
Clinton CountyAttainment/Unclassifiable.
Cole CountyAttainment/Unclassifiable.
Cooper CountyAttainment/Unclassifiable.
Crawford CountyAttainment/Unclassifiable.
Dade CountyAttainment/Unclassifiable.
Dallas CountyAttainment/Unclassifiable.
Daviess CountyAttainment/Unclassifiable.
DeKalb CountyAttainment/Unclassifiable.
Dent CountyAttainment/Unclassifiable.
Douglas CountyAttainment/Unclassifiable.
Dunklin CountyAttainment/Unclassifiable.
Franklin County (part) (remainder)Attainment/Unclassifiable.
Gasconade CountyAttainment/Unclassifiable.
Gentry CountyAttainment/Unclassifiable.
Greene CountyAttainment/Unclassifiable.
Grundy CountyAttainment/Unclassifiable.
Harrison CountyAttainment/Unclassifiable.
Henry CountyAttainment/Unclassifiable.
Hickory CountyAttainment/Unclassifiable.
Holt CountyAttainment/Unclassifiable.
Howard CountyAttainment/Unclassifiable.
Howell CountyAttainment/Unclassifiable.
Iron County4/30/2021Attainment/Unclassifiable.
Jackson County (part) (remainder)Attainment/Unclassifiable.
Jasper CountyAttainment/Unclassifiable.
Jefferson County (part) (remainder)Attainment/Unclassifiable.
Johnson CountyAttainment/Unclassifiable.
Knox CountyAttainment/Unclassifiable.
Laclede CountyAttainment/Unclassifiable.
Lafayette CountyAttainment/Unclassifiable.
Lawrence CountyAttainment/Unclassifiable.
Lewis CountyAttainment/Unclassifiable.
Lincoln CountyAttainment/Unclassifiable.
Linn CountyAttainment/Unclassifiable.
Livingston CountyAttainment/Unclassifiable.
Macon CountyAttainment/Unclassifiable.
Madison CountyAttainment/Unclassifiable.
Maries CountyAttainment/Unclassifiable.
Marion CountyAttainment/Unclassifiable.
McDonald CountyAttainment/Unclassifiable.
Mercer CountyAttainment/Unclassifiable.
Miller CountyAttainment/Unclassifiable.
Mississippi CountyAttainment/Unclassifiable.
Moniteau CountyAttainment/Unclassifiable.
Monroe CountyAttainment/Unclassifiable.
Montgomery CountyAttainment/Unclassifiable.
Morgan CountyAttainment/Unclassifiable.
New Madrid County (remainder)4/30/2021Attainment/Unclassifiable.
Newton CountyAttainment/Unclassifiable.
Nodaway CountyAttainment/Unclassifiable.
Oregon CountyAttainment/Unclassifiable.
Osage CountyAttainment/Unclassifiable.
Ozark CountyAttainment/Unclassifiable.
Pemiscot CountyAttainment/Unclassifiable.
Perry CountyAttainment/Unclassifiable.
Pettis CountyAttainment/Unclassifiable.
Phelps CountyAttainment/Unclassifiable.
Pike CountyAttainment/Unclassifiable.
Platte CountyAttainment/Unclassifiable.
Polk CountyAttainment/Unclassifiable.
Pulaski CountyAttainment/Unclassifiable.
Putnam CountyAttainment/Unclassifiable.
Ralls CountyAttainment/Unclassifiable.
Randolph CountyAttainment/Unclassifiable.
Ray CountyAttainment/Unclassifiable.
Reynolds CountyAttainment/Unclassifiable.
Ripley CountyAttainment/Unclassifiable.
St. Charles County (part) (remainder)Attainment/Unclassifiable.
St. Clair CountyAttainment/Unclassifiable.
St. Francois CountyAttainment/Unclassifiable.
Ste. Genevieve CountyAttainment/Unclassifiable.
St. Louis CityAttainment/Unclassifiable.
St. Louis CountyAttainment/Unclassifiable.
Saline CountyAttainment/Unclassifiable.
Schuyler CountyAttainment/Unclassifiable.
Scotland CountyAttainment/Unclassifiable.
Scott County9/12/2016Attainment/Unclassifiable.
Shannon CountyAttainment/Unclassifiable.
Shelby CountyAttainment/Unclassifiable.
Stoddard CountyAttainment/Unclassifiable.
Stone CountyAttainment/Unclassifiable.
Sullivan CountyAttainment/Unclassifiable.
Taney CountyAttainment/Unclassifiable.
Texas CountyAttainment/Unclassifiable.
Vernon CountyAttainment/Unclassifiable.
Warren CountyAttainment/Unclassifiable.
Washington CountyAttainment/Unclassifiable.
Wayne CountyAttainment/Unclassifiable.
Webster CountyAttainment/Unclassifiable.
Worth CountyAttainment/Unclassifiable.
Wright 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.

Missouri—Carbon Monoxide

Designated Area Designation Classification
Date 1 Type Date 1 Type
St. Louis Area:
St. Louis CityAttainment
St. Louis County (part):
The area encompassed by the I-270 and the, Mississippi River.Attainment
AQCR 137 Northern Missouri Intrastate:
Pike CountyUnclassifiable/Attainment
Ralls CountyUnclassifiable/Attainment
AQCR 137 Northern Missouri Intrastate (Remainder of)Unclassifiable/Attainment
Adair County
Andrew County
Atchison County
Audrain County
Boone County
Caldwell County
Callaway County
Carroll County
Chariton County
Clark County
Clinton County
Cole County
Cooper County
Daviess County
De Kalb County
Gentry County
Grundy County
Harrison County
Holt County
Howard County
Knox County
Lewis County
Lincoln County
Linn County
Livingston County
Macon County
Marion County
Mercer County
Moniteau County
Monroe County
Montgomery County
Nodaway County
Osage County
Putnam County
Randolph County
Saline County
Schuyler County
Scotland County
Shelby County
Sullivan County
Warren County
Worth County
Rest of StateUnclassifiable/Attainment
Barry County
Barton County
Bates County
Benton County
Bollinger County
Buchanan County
Butler County
Camden County
Cape Girardeau County
Carter County
Cass County
Cedar County
Christina County
Clay County
Crawford County
Dade County
Dallas County
Dent County
Douglas County
Dunklin County
Franklin County
Gasconade County
Greene County
Henry County
Hickory County
Howell County
Iron County
Jackson County
Jasper County
Jefferson County
Johnson County
Laclede County
Lafayette County
Lawrence County
Madison County
Maries County
McDonald County
Miller County
Mississippi County
Morgan County
New Madrid County
Newton County
Oregon County
Ozark County
Pemiscot County
Perry County
Pettis County
Phelps County
Platte County
Polk County
Pulaski County
Ray County
Reynolds County
Ripley County
Scott County
Shannon County
St. Charles County
St. Clair County
St. Francis County
St. Louis County (part) Remainder of County
Ste. Geevieve County
Stoddard County
Stone County
Taney County
Texas County
Vernon County
Washington County
Wayne County
Webster County
Wright County

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

Missouri—Ozone (1-Hour Standard) 2

Designated area Designation Classification
Date 1 Type Date 1 Type
Kansas City Area:
Clay County7/23/1992Unclassifiable/Attainment
Jackson County7/23/1992Unclassifiable/Attainment
Platte County7/23/1992Unclassifiable/Attainment
St. Louis Area:
Franklin County5/12/2003Attainment
Jefferson County5/12/2003Attainment
St. Charles County5/12/2003Attainment
St. Louis5/12/2003Attainment
St. Louis County5/12/2003Attainment
AQCR 094 Metro Kansas City Interstate (Remainder of)
Buchanan County
Cass County
Ray County
AQCR 137 N. Missouri Intrastate (part)
Pike CountyUnclassifiable/Attainment
Ralls CountyUnclassifiable/Attainment
AQCR 137 N. Missouri Intrastate (Remainder of)Unclassifiable/Attainment
Adair County
Andrew County
Atchison County
Audrain County
Boone County
Caldwell County
Callaway County
Carroll County
Chariton County
Clark County
Clinton County
Cole County
Cooper County
Daviess County
DeKalb County
Gentry County
Grundy County
Harrison County
Holt County
Howard County
Knox County
Lewis County
Lincoln County
Linn County
Livingston County
Macon County
Marion County
Mercer County
Moniteau County
Monroe County
Montgomery County
Nodaway County
Osage County
Putnam County
Randolph County
Saline County
Schuyler County
Scotland County
Shelby County
Sullivan County
Warren County
Worth County
Rest of StateUnclassifiable/Attainment
Barry County
Barton County
Bates County
Benton County
Bollinger County
Butler County
Camden County
Cape Girardeau County
Carter County
Cedar County
Christian County
Crawford County
Dade County
Dallas County
Dent County
Douglas County
Dunklin County
Gasconade County
Greene County
Henry County
Hickory County
Howell County
Iron County
Jasper County
Johnson County
Laclede County
Lafayette County
Lawrence County
Madison County
Maries County
McDonald County
Miller County
Mississippi County
Morgan County
New Madrid County
Newton County
Oregon County
Ozark County
Pemiscot County
Perry County
Pettis County
Phelps County
Polk County
Pulaski County
Reynolds County
Ripley County
Scott County
Shannon County
St. Clair County
St. Francois County
Ste. Genevieve County
Stoddard County
Stone County
Taney County
Texas County
Vernon County
Washington County
Wayne County
Webster County
Wright 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 Missouri. The Kansas City and St. Louis areas are maintenance areas for the 1-hour NAAQS for purposes of 40 CFR part 51 subpart X.

Missouri—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date 2 Type
St. Louis, MO-IL:
Franklin County8/3/2018Attainment
Jefferson County8/3/2018Attainment
St. Charles County8/3/2018Attainment
St. Louis County8/3/2018Attainment
St. Louis City8/3/2018Attainment
Rest of State:
Adair CountyUnclassifiable/Attainment.
Andrew CountyUnclassifiable/Attainment.
Atchison CountyUnclassifiable/Attainment.
Audrain CountyUnclassifiable/Attainment.
Barry CountyUnclassifiable/Attainment.
Barton CountyUnclassifiable/Attainment.
Bates CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bollinger CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Buchanan CountyUnclassifiable/Attainment.
Butler CountyUnclassifiable/Attainment.
Caldwell CountyUnclassifiable/Attainment.
Callaway CountyUnclassifiable/Attainment.
Camden CountyUnclassifiable/Attainment.
Cape Girardeau CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Carter CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Cedar CountyUnclassifiable/Attainment.
Chariton CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Cole CountyUnclassifiable/Attainment.
Cooper CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Dade CountyUnclassifiable/Attainment.
Dallas CountyUnclassifiable/Attainment.
Daviess CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
Dent CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
Dunklin CountyUnclassifiable/Attainment.
Gasconade CountyUnclassifiable/Attainment.
Gentry CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Hickory CountyUnclassifiable/Attainment.
Holt CountyUnclassifiable/Attainment.
Howard CountyUnclassifiable/Attainment.
Howell CountyUnclassifiable/Attainment.
Iron CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Laclede CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lewis CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Linn CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
McDonald CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Maries CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
Miller CountyUnclassifiable/Attainment.
Mississippi CountyUnclassifiable/Attainment.
Moniteau CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
New Madrid CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Oregon CountyUnclassifiable/Attainment.
Osage CountyUnclassifiable/Attainment.
Ozark CountyUnclassifiable/Attainment.
Pemiscot CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pettis CountyUnclassifiable/Attainment.
Phelps CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Platte CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Ralls CountyUnclassifiable/Attainment.
Randolph CountyUnclassifiable/Attainment.
Ray CountyUnclassifiable/Attainment.
Reynolds CountyUnclassifiable/Attainment.
Ripley CountyUnclassifiable/Attainment.
St. Clair CountyUnclassifiable/Attainment.
St. Genevieve CountyUnclassifiable/Attainment.
St. Francois CountyUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scotland CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shannon CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stoddard CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Taney CountyUnclassifiable/Attainment.
Texas CountyUnclassifiable/Attainment.
Vernon CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Worth CountyUnclassifiable/Attainment.
Wright 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.

Missouri—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
St. Louis Area, MO-IL:
Franklin County7/29/2019, 84 FR 36473Unclassifiable/Attainment
Jefferson County7/29/2019, 84 FR 36473Unclassifiable/Attainmant
St. Charles County7/29/2019, 84 FR 36473Unclassifiable/Attainmant
St. Louis County7/29/2019, 84 FR 36473Unclassifiable/Attainmant
St. Louis City7/29/2019, 84 FR 36473Unclassifiable/Attainmant
Rest of State:
Adair CountyUnclassifiable/Attainment
Andrew CountyUnclassifiable/Attainment
Atchison CountyUnclassifiable/Attainment
Audrain CountyUnclassifiable/Attainment
Barry CountyUnclassifiable/Attainment
Barton CountyUnclassifiable/Attainment
Bates CountyUnclassifiable/Attainment
Benton CountyUnclassifiable/Attainment
Bollinger CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Buchanan CountyUnclassifiable/Attainment
Butler CountyUnclassifiable/Attainment
Caldwell CountyUnclassifiable/Attainment
Callaway CountyUnclassifiable/Attainment
Camden CountyUnclassifiable/Attainment
Cape Girardeau CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Carter CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Cedar CountyUnclassifiable/Attainment
Chariton CountyUnclassifiable/Attainment
Christian CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Cole CountyUnclassifiable/Attainment
Cooper CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Dade CountyUnclassifiable/Attainment
Dallas CountyUnclassifiable/Attainment
Daviess CountyUnclassifiable/Attainment
DeKalb CountyUnclassifiable/Attainment
Dent CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Dunklin CountyUnclassifiable/Attainment
Gasconade CountyUnclassifiable/Attainment
Gentry CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Harrison CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Hickory CountyUnclassifiable/Attainment
Holt CountyUnclassifiable/Attainment
Howard CountyUnclassifiable/Attainment
Howell CountyUnclassifiable/Attainment
Iron CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Knox CountyUnclassifiable/Attainment
Laclede CountyUnclassifiable/Attainment
Lafayette CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Lewis CountyUnclassifiable/Attainment
Lincoln CountyUnclassifiable/Attainment
Linn CountyUnclassifiable/Attainment
Livingston CountyUnclassifiable/Attainment
McDonald CountyUnclassifiable/Attainment
Macon CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Maries CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Mercer CountyUnclassifiable/Attainment
Miller CountyUnclassifiable/Attainment
Mississippi CountyUnclassifiable/Attainment
Moniteau CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Morgan CountyUnclassifiable/Attainment
New Madrid CountyUnclassifiable/Attainment
Newton CountyUnclassifiable/Attainment
Nodaway CountyUnclassifiable/Attainment
Oregon CountyUnclassifiable/Attainment
Osage CountyUnclassifiable/Attainment
Ozark CountyUnclassifiable/Attainment
Pemiscot CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Pettis CountyUnclassifiable/Attainment
Phelps CountyUnclassifiable/Attainment
Pike CountyUnclassifiable/Attainment
Platte CountyUnclassifiable/Attainment
Polk CountyUnclassifiable/Attainment
Pulaski CountyUnclassifiable/Attainment
Putnam CountyUnclassifiable/Attainment
Ralls CountyUnclassifiable/Attainment
Randolph CountyUnclassifiable/Attainment
Ray CountyUnclassifiable/Attainment
Reynolds CountyUnclassifiable/Attainment
Ripley CountyUnclassifiable/Attainment
St Clair CountyUnclassifiable/Attainment
St Genevieve CountyUnclassifiable/Attainment
St Francois CountyUnclassifiable/Attainment
Saline CountyUnclassifiable/Attainment
Schuyler CountyUnclassifiable/Attainment
Scotland CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shannon CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Stoddard CountyUnclassifiable/Attainment
Stone CountyUnclassifiable/Attainment
Sullivan CountyUnclassifiable/Attainment
Taney CountyUnclassifiable/Attainment
Texas CountyUnclassifiable/Attainment
Vernon CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
Webster CountyUnclassifiable/Attainment
Worth CountyUnclassifiable/Attainment
Wright 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.

Missouri—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Adair CountyUnclassifiable/Attainment.
Andrew CountyUnclassifiable/Attainment.
Atchison CountyUnclassifiable/Attainment.
Audrain CountyUnclassifiable/Attainment.
Barry CountyUnclassifiable/Attainment.
Barton CountyUnclassifiable/Attainment.
Bates CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bollinger CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Buchanan CountyUnclassifiable/Attainment.
Butler CountyUnclassifiable/Attainment.
Caldwell CountyUnclassifiable/Attainment.
Callaway CountyUnclassifiable/Attainment.
Camden CountyUnclassifiable/Attainment.
Cape Girardeau CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Carter CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Cedar CountyUnclassifiable/Attainment.
Chariton CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Cole CountyUnclassifiable/Attainment.
Cooper CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Dade CountyUnclassifiable/Attainment.
Dallas CountyUnclassifiable/Attainment.
Daviess CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
Dent CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
Dunklin CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Gasconade CountyUnclassifiable/Attainment.
Gentry CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Hickory CountyUnclassifiable/Attainment.
Holt CountyUnclassifiable/Attainment.
Howard CountyUnclassifiable/Attainment.
Howell CountyUnclassifiable/Attainment.
Iron CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Laclede CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lewis CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Linn CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
McDonald CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Maries CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
Miller CountyUnclassifiable/Attainment.
Mississippi CountyUnclassifiable/Attainment.
Moniteau CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
New Madrid CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Nodaway CountyUnclassifiable/Attainment.
Oregon CountyUnclassifiable/Attainment.
Osage CountyUnclassifiable/Attainment.
Ozark CountyUnclassifiable/Attainment.
Pemiscot CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pettis CountyUnclassifiable/Attainment.
Phelps CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Platte CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Ralls CountyUnclassifiable/Attainment.
Randolph CountyUnclassifiable/Attainment.
Ray CountyUnclassifiable/Attainment.
Reynolds CountyUnclassifiable/Attainment.
Ripley CountyUnclassifiable/Attainment.
St Charles CountyUnclassifiable/Attainment.
St Clair CountyUnclassifiable/Attainment.
St Genevieve CountyUnclassifiable/Attainment.
St Francois CountyUnclassifiable/Attainment.
St Louis CityUnclassifiable/Attainment.
St Louis CountyUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scotland CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shannon CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stoddard CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Taney CountyUnclassifiable/Attainment.
Texas CountyUnclassifiable/Attainment.
Vernon CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Worth CountyUnclassifiable/Attainment.
Wright 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.

Missouri—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Adair CountyUnclassifiable/Attainment.
Andrew CountyUnclassifiable/Attainment.
Atchison CountyUnclassifiable/Attainment.
Audrain CountyUnclassifiable/Attainment.
Barry CountyUnclassifiable/Attainment.
Barton CountyUnclassifiable/Attainment.
Bates CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bollinger CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Buchanan CountyUnclassifiable/Attainment.
Butler CountyUnclassifiable/Attainment.
Caldwell CountyUnclassifiable/Attainment.
Callaway CountyUnclassifiable/Attainment.
Camden CountyUnclassifiable/Attainment.
Cape Girardeau CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Carter CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Cedar CountyUnclassifiable/Attainment.
Chariton CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Cole CountyUnclassifiable/Attainment.
Cooper CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Dade CountyUnclassifiable/Attainment.
Dallas CountyUnclassifiable/Attainment.
Daviess CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
Dent CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
Dunklin CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Gasconade CountyUnclassifiable/Attainment.
Gentry CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Hickory CountyUnclassifiable/Attainment.
Holt CountyUnclassifiable/Attainment.
Howard CountyUnclassifiable/Attainment.
Howell CountyUnclassifiable/Attainment.
Iron CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Laclede CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lewis CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Linn CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
McDonald CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Maries CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
Miller CountyUnclassifiable/Attainment.
Mississippi CountyUnclassifiable/Attainment.
Moniteau CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
New Madrid CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Nodaway CountyUnclassifiable/Attainment.
Oregon CountyUnclassifiable/Attainment.
Osage CountyUnclassifiable/Attainment.
Ozark CountyUnclassifiable/Attainment.
Pemiscot CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pettis CountyUnclassifiable/Attainment.
Phelps CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Platte CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Ralls CountyUnclassifiable/Attainment.
Randolph CountyUnclassifiable/Attainment.
Ray CountyUnclassifiable/Attainment.
Reynolds CountyUnclassifiable/Attainment.
Ripley CountyUnclassifiable/Attainment.
St Charles CountyUnclassifiable/Attainment.
St Clair CountyUnclassifiable/Attainment.
St Genevieve CountyUnclassifiable/Attainment.
St Francois CountyUnclassifiable/Attainment.
St Louis CityUnclassifiable/Attainment.
St Louis CountyUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scotland CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shannon CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stoddard CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Taney CountyUnclassifiable/Attainment.
Texas CountyUnclassifiable/Attainment.
Vernon CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Worth CountyUnclassifiable/Attainment.
Wright 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.

Missouri—NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards
Northern AQCR (137):
Pike CountyX
Ralls CountyX
Remainder of AQCRX
Remainder of StateX

Missouri—NO2 (2010 1-Hour Standard)

Designated area Designation a
Date 1 Type
Adair CountyUnclassifiable/Attainment.
Andrew CountyUnclassifiable/Attainment.
Atchison CountyUnclassifiable/Attainment.
Audrain CountyUnclassifiable/Attainment.
Barry CountyUnclassifiable/Attainment.
Barton CountyUnclassifiable/Attainment.
Bates CountyUnclassifiable/Attainment.
Benton CountyUnclassifiable/Attainment.
Bollinger CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Buchanan CountyUnclassifiable/Attainment.
Butler CountyUnclassifiable/Attainment.
Caldwell CountyUnclassifiable/Attainment.
Callaway CountyUnclassifiable/Attainment.
Camden CountyUnclassifiable/Attainment.
Cape Girardeau CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Carter CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Cedar CountyUnclassifiable/Attainment.
Chariton CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Cole CountyUnclassifiable/Attainment.
Cooper CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Dade CountyUnclassifiable/Attainment.
Dallas CountyUnclassifiable/Attainment.
Daviess CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
Dent CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
Dunklin CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Gasconade CountyUnclassifiable/Attainment.
Gentry CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Harrison CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Hickory CountyUnclassifiable/Attainment.
Holt CountyUnclassifiable/Attainment.
Howard CountyUnclassifiable/Attainment.
Howell CountyUnclassifiable/Attainment.
Iron CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
Laclede CountyUnclassifiable/Attainment.
Lafayette CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lewis CountyUnclassifiable/Attainment.
Lincoln CountyUnclassifiable/Attainment.
Linn CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
McDonald CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Maries CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
Miller CountyUnclassifiable/Attainment.
Mississippi CountyUnclassifiable/Attainment.
Moniteau CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
New Madrid CountyUnclassifiable/Attainment.
Newton CountyUnclassifiable/Attainment.
Nodaway CountyUnclassifiable/Attainment.
Oregon CountyUnclassifiable/Attainment.
Osage CountyUnclassifiable/Attainment.
Ozark CountyUnclassifiable/Attainment.
Pemiscot CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Pettis CountyUnclassifiable/Attainment.
Phelps CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Platte CountyUnclassifiable/Attainment.
Polk CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Ralls CountyUnclassifiable/Attainment.
Randolph CountyUnclassifiable/Attainment.
Ray CountyUnclassifiable/Attainment.
Reynolds CountyUnclassifiable/Attainment.
Ripley CountyUnclassifiable/Attainment.
St. Charles CountyUnclassifiable/Attainment.
St. Clair CountyUnclassifiable/Attainment.
St. Genevieve CountyUnclassifiable/Attainment.
St. Francois CountyUnclassifiable/Attainment.
St. Louis CountyUnclassifiable/Attainment.
St. Louis CityUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scotland CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shannon CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stoddard CountyUnclassifiable/Attainment.
Stone CountyUnclassifiable/Attainment.
Sullivan CountyUnclassifiable/Attainment.
Taney CountyUnclassifiable/Attainment.
Texas CountyUnclassifiable/Attainment.
Vernon CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
Webster CountyUnclassifiable/Attainment.
Worth CountyUnclassifiable/Attainment.
Wright 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.

Missouri—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification
Date 1 Type Date 1 Type
Kansas City, MO-KS:
Cass County5/3/2005Attainment.
Clay County5/3/2005Attainment.
Jackson County5/3/2005Attainment.
Platte County5/3/2005Attainment.
St. Louis, MO-IL
Franklin County2/20/2015Attainment
Jefferson County2/20/2015Attainment
St. Charles County2/20/2015Attainment
St. Louis City2/20/2015Attainment
St. Louis County2/20/2015Attainment
AQCR 094 Metro Kansas City InterstateUnclassifiable/Attainment.
Buchanan County
Ray County
AQCR 137 N. Missouri Intrastate (part)
Pike CountyUnclassifiable/Attainment.
Ralls CountyUnclassifiable/Attainment.
AQCR 137 N. Missouri Intrastate (remainder of)Unclassifiable/Attainment.
Adair County
Andrew County
Atchison County
Audrain County
Boone County
Caldwell County
Callaway County
Carroll County
Chariton County
Clark County
Clinton County
Cole County
Cooper County
Daviess County
DeKalb County
Gentry County
Grundy County
Harrison County
Holt County
Howard County
Knox County
Lewis County
Lincoln County
Linn County
Livingston County
Macon County
Marion County
Mercer County
Moniteau County
Monroe County
Montgomery County
Nodaway County
Osage County
Putnam County
Randolph County
Saline County
Schuyler County
Scotland County
Shelby County
Sullivan County
Warren County
Worth County
Rest of State:Unclassifiable/Attainment
Barry County
Barton County
Bates County
Benton County
Bollinger County
Butler County
Camden County
Cape Girardeau County
Carter County
Cedar County
Christian County
Crawford County
Dade County
Dallas County
Dent County
Douglas County
Dunklin County
Gasconade County
Greene County
Henry County
Hickory County
Howell County
Iron County
Jasper County
Johnson County
Laclede County
Lafayette County
Lawrence County
Madison County
Maries County
McDonald County
Miller County
Mississippi County
Morgan County
New Madrid County
Newton County
Oregon County
Ozark County
Pemiscot County
Perry County
Pettis County
Phelps County
Polk County
Pulaski County
Reynolds County
Ripley County
St. Clair County
St. Francois County
Ste. Genevieve County
Scott County
Shannon County
Stoddard County
Stone County
Taney County
Texas County
Vernon County
Washington County
Wayne County
Webster County
Wright 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.

Missouri—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification
Date 1 Type Date 1 Type
St. Louis-St. Charles-Farmington, MO-IL 2:
Franklin County9/20/2018Attainment
Jefferson County9/20/2018Attainment
St. Charles County9/20/2018Attainment
St. Louis County9/20/2018Attainment
St. Louis City9/20/2018Attainment
Rest of State: 3Unclassifiable/Attainment
Adair County
Andrew County
Atchison County
Audrain County
Barry County
Barton County
Bates County
Benton County
Bollinger County
Boone County
Buchanan County
Butler County
Caldwell County
Callaway County
Camden County
Cape Girardeau County
Carter County
Cass County
Cedar County
Chariton County
Christian County
Clark County
Clay County
Clinton County
Cole County
Cooper County
Crawford County
Dade County
Dallas County
Daviess County
DeKalb County
Dent County
Douglas County
Dunklin County
Gasconade County
Gentry County
Greene County
Grundy County
Harrison County
Henry County
Hickory County
Holt County
Howard County
Howell County
Iron County
Jackson County
Jasper County
Johnson County
Knox County
Laclede County
Lafayette County
Lawrence County
Lewis County
Lincoln County
Linn County
Livingston County
McDonald County
Macon County
Madison County
Maries County
Marion County
Mercer County
Miller County
Mississippi County
Moniteau County
Monroe County
Montgomery County
Morgan County
New Madrid County
Newton County
Nodaway County
Oregon County
Osage County
Ozark County
Pemiscot County
Perry County
Pettis County
Phelps County
Pike County
Platte County
Polk County
Pulaski County
Putnam County
Ralls County
Randolph County
Ray County
Reynolds County
Ripley County
St. Clair County
St. Genevieve County
St. Francois County
Saline County
Schuyler County
Scotland County
Scott County
Shannon County
Shelby County
Stoddard County
Stone County
Sullivan County
Taney County
Texas County
Vernon County
Warren County
Washington County
Wayne County
Webster County
Worth County
Wright County

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

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

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

4 Attainment date is extended to July 20, 2016.

Missouri—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
St. Louis, MO-IL:Nonattainment12/31/2024Serious.
Franklin County (part).
Boles Township:
Jefferson CountyJuly 14, 2021 3
St. Charles County.
St. Louis County.
City of St. Louis.
Adair County1/16/2018Attainment/Unclassifiable
Andrew County1/16/2018Attainment/Unclassifiable
Atchison County1/16/2018Attainment/Unclassifiable
Audrain County1/16/2018Attainment/Unclassifiable
Barry County1/16/2018Attainment/Unclassifiable
Barton County1/16/2018Attainment/Unclassifiable
Bates County1/16/2018Attainment/Unclassifiable
Benton County1/16/2018Attainment/Unclassifiable
Bollinger County1/16/2018Attainment/Unclassifiable
Boone County1/16/2018Attainment/Unclassifiable
Buchanan County1/16/2018Attainment/Unclassifiable
Butler County1/16/2018Attainment/Unclassifiable
Caldwell County1/16/2018Attainment/Unclassifiable
Callaway County1/16/2018Attainment/Unclassifiable
Camden County1/16/2018Attainment/Unclassifiable
Cape Girardeau County1/16/2018Attainment/Unclassifiable
Carroll County1/16/2018Attainment/Unclassifiable
Carter County1/16/2018Attainment/Unclassifiable
Cass County1/16/2018Attainment/Unclassifiable
Cedar County1/16/2018Attainment/Unclassifiable
Chariton County1/16/2018Attainment/Unclassifiable
Christian County1/16/2018Attainment/Unclassifiable
Clark County1/16/2018Attainment/Unclassifiable
Clay County1/16/2018Attainment/Unclassifiable
Clinton County1/16/2018Attainment/Unclassifiable
Cole County1/16/2018Attainment/Unclassifiable
Cooper County1/16/2018Attainment/Unclassifiable
Crawford County1/16/2018Attainment/Unclassifiable
Dade County1/16/2018Attainment/Unclassifiable
Dallas County1/16/2018Attainment/Unclassifiable
Daviess County1/16/2018Attainment/Unclassifiable
DeKalb County1/16/2018Attainment/Unclassifiable
Dent County1/16/2018Attainment/Unclassifiable
Douglas County1/16/2018Attainment/Unclassifiable
Dunklin County1/16/2018Attainment/Unclassifiable
Franklin County (part) remainderAttainment/Unclassifiable
Gasconade County1/16/2018Attainment/Unclassifiable
Gentry County1/16/2018Attainment/Unclassifiable
Greene County1/16/2018Attainment/Unclassifiable
Grundy County1/16/2018Attainment/Unclassifiable
Harrison County1/16/2018Attainment/Unclassifiable
Henry County1/16/2018Attainment/Unclassifiable
Hickory County1/16/2018Attainment/Unclassifiable
Holt County1/16/2018Attainment/Unclassifiable
Howard County1/16/2018Attainment/Unclassifiable
Howell County1/16/2018Attainment/Unclassifiable
Iron County1/16/2018Attainment/Unclassifiable
Jackson County1/16/2018Attainment/Unclassifiable
Jasper County1/16/2018Attainment/Unclassifiable
Johnson County1/16/2018Attainment/Unclassifiable
Knox County1/16/2018Attainment/Unclassifiable
Laclede County1/16/2018Attainment/Unclassifiable
Lafayette County1/16/2018Attainment/Unclassifiable
Lawrence County1/16/2018Attainment/Unclassifiable
Lewis County1/16/2018Attainment/Unclassifiable
Lincoln CountyAttainment/Unclassifiable
Linn County1/16/2018Attainment/Unclassifiable
Livingston County1/16/2018Attainment/Unclassifiable
McDonald County1/16/2018Attainment/Unclassifiable
Macon County1/16/2018Attainment/Unclassifiable
Madison County1/16/2018Attainment/Unclassifiable
Maries County1/16/2018Attainment/Unclassifiable
Marion County1/16/2018Attainment/Unclassifiable
Mercer County1/16/2018Attainment/Unclassifiable
Miller County1/16/2018Attainment/Unclassifiable
Mississippi County1/16/2018Attainment/Unclassifiable
Moniteau County1/16/2018Attainment/Unclassifiable
Monroe County1/16/2018Attainment/Unclassifiable
Montgomery County1/16/2018Attainment/Unclassifiable
Morgan County1/16/2018Attainment/Unclassifiable
New Madrid County1/16/2018Attainment/Unclassifiable
Newton County1/16/2018Attainment/Unclassifiable
Nodaway County1/16/2018Attainment/Unclassifiable
Oregon County1/16/2018Attainment/Unclassifiable
Osage County1/16/2018Attainment/Unclassifiable
Ozark County1/16/2018Attainment/Unclassifiable
Pemiscot County1/16/2018Attainment/Unclassifiable
Perry County1/16/2018Attainment/Unclassifiable
Pettis County1/16/2018Attainment/Unclassifiable
Phelps County1/16/2018Attainment/Unclassifiable
Pike County1/16/2018Attainment/Unclassifiable
Platte County1/16/2018Attainment/Unclassifiable
Polk County1/16/2018Attainment/Unclassifiable
Pulaski County1/16/2018Attainment/Unclassifiable
Putnam County1/16/2018Attainment/Unclassifiable
Ralls County1/16/2018Attainment/Unclassifiable
Randolph County1/16/2018Attainment/Unclassifiable
Ray County1/16/2018Attainment/Unclassifiable
Reynolds County1/16/2018Attainment/Unclassifiable
Ripley County1/16/2018Attainment/Unclassifiable
St. Clair County1/16/2018Attainment/Unclassifiable
St. Francois CountyAttainment/Unclassifiable
Ste. Genevieve County1/16/2018Attainment/Unclassifiable
Saline County1/16/2018Attainment/Unclassifiable
Schuyler County1/16/2018Attainment/Unclassifiable
Scotland County1/16/2018Attainment/Unclassifiable
Scott County1/16/2018Attainment/Unclassifiable
Shannon County1/16/2018Attainment/Unclassifiable
Shelby County1/16/2018Attainment/Unclassifiable
Stoddard County1/16/2018Attainment/Unclassifiable
Stone County1/16/2018Attainment/Unclassifiable
Sullivan County1/16/2018Attainment/Unclassifiable
Taney County1/16/2018Attainment/Unclassifiable
Texas County1/16/2018Attainment/Unclassifiable
Vernon County1/16/2018Attainment/Unclassifiable
Warren CountyAttainment/Unclassifiable
Washington County1/16/2018Attainment/Unclassifiable
Wayne County1/16/2018Attainment/Unclassifiable
Webster County1/16/2018Attainment/Unclassifiable
Worth County1/16/2018Attainment/Unclassifiable
Wright County1/16/2018Attainment/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.

3 EPA revised the nonattainment boundary in response to a court decision, which did not vacate any designations for the 2015 ozone NAAQS, but which remanded the designation for the identified county. Because this additional area is part of a previously designated nonattainment area, the implementation dates for the overall nonattainment area (e.g., the August 3, 2021 attainment date) remain unchanged regardless of this later designation date.

Missouri—1978 Lead NAAQS

Designated area Designation Classification
Date Type Date Type
Iron County (part)
Within boundaries of Dent Township10/18/2000Attainment
Iron County (part)
Within boundaries of Liberty and Arcadia Townships10/29/2004Attainment
Jefferson County (part)
Within city limits of Herculaneum1/6/1992Nonattainment
Dent County1/6/1992Unclassifiable
Holt County1/6/1992Unclassifiable
Rest of State Not Designated.

Missouri—2008 Lead NAAQS

Designated area Designation for the 2008 NAAQS a
Date 1 Type
Iron, Dent, and Reynolds Counties, MO:
Dent County (part)12/31/2010Nonattainment.
Sections 4, 9, 16, 21, 28, 33 of T34N, R2W
Iron County (part)12/31/2010Nonattainment.
Sections 6-7, 18-19, 30-32 of T34N, R1W and Sections 1-3, 10-15, 22-27, 34-36 of T34N, R2W.
Reynolds County (part)12/31/2010Nonattainment.
Sections 5-7 of T33N, R1W and Sections 1-3, 10-12 of T33N, R2W.
Jefferson County, MO:
Jefferson County (part)12/31/2010Nonattainment.
Within city limits of Herculaneum.
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 § 81.326, 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 81.326
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