Regulations last checked for updates: Feb 09, 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]
§ 81.314 - Illinois.

Illinois—TSP

Designated area Does not meet primary Does not meet secondary Cannot be classified Better than national standards
Cook County:
a. Lyons TownshipXX
b. The area bounded on the north by 79th Street, on the west by Interstate 57 between Sibley Boulevard and Interstate 94 and by Interstate 94 between Interstate 57 and 79th Street, on the south by Sibley Boulevard, and on the east by the Illinois/Indiana State lineXX
LaSalle County:
Those portions of LaSalle Township located in the following Townships, ranges, and sections: T33N, R1E, S24; T33N, R1E, S25; T33N, R2E, S30; T33N, R2E, S31; and T33N, R1E, S36XX
Those portions of Deer Park Township located in the following Townships, ranges, and sections: T32N, R1E, S1; T32N, R2E, S6; T33N, R1E, S24; T33N, R1E, S25; T33N, R2E, S30; T33N, R2E, S31; and T33N, R1E, S36X
Madison County: Granite City Township and Nameoki TownshipXX
All other portions of Illinois countiesX

Illinois—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards
AQCR 65:
Fulton CountyX
Hancock CountyX
Henderson CountyX
Knox CountyX
McDonough CountyX
Mason CountyX
Peoria CountyX
Tazewell CountyX
Warren CountyX
Woodford CountyX
Lee CountyX
AQCR 66:
Champaign CountyX
Clark CountyX
Coles CountyX
Cumberland CountyX
De Witt CountyX
Douglas CountyX
Edgar CountyX
Ford CountyX
Iroquois CountyX
Livingston CountyX
McLean CountyX
Moultrie CountyX
Platt CountyX
Shelby CountyX
Vermilion CountyX
AQCR 67:
Cook County:
Bremer TwpX
Calumet TwpX
Thornton TwpX
Worth TwpX
All other Cook County twpsX
Will County:
Channahon TwpX
Du Page TwpX
Joliet TwpX
Lockport TwpX
Troy TwpX
All other Will County twpsX
Du Page CountyX
Grundy CountyX
Kane CountyX
Kankakee CountyX
Kendall CountyX
Lake CountyX
McHenry CountyX
AQCR 68:
Jo Daviess CountyX
AQCR 69:
Carroll CountyX
Henry CountyX
Mercer CountyX
Rock Island CountyX
Whiteside CountyX
AQCR 70:
Madison County:
Wood River TwpX
Alton TwpX
All other Madison twpsX
Bond CountyX
Clinton CountyX
Monroe CountyX
Randolph CountyX
St. Clair CountyX
Washington CountyX
AQCR 71:
Bureau County:
Shelby TwpX
All other Bureau twpsX
La Salle CountyX
Lee CountyX
Marshall CountyX
Putnam CountyX
Stark CountyX
AQCR 72:
Massac CountyX
Alexander CountyX
Johnson CountyX
Pope CountyX
Pulaski CountyX
Union CountyX
AQCR 73
Boone CountyX
De Kalb CountyX
Ogle CountyX
StephensonX
Winnebago CountyX
AQCR 74:
Clay CountyX
Crawford CountyX
Edwards CountyX
Effingham CountyX
Fayette CountyX
Franklin CountyX
Gallatin CountyX
Hamilton CountyX
Hardin CountyX
Jackson CountyX
Jasper CountyX
Jefferson CountyX
Lawrence CountyX
Marion CountyX
Perry CountyX
Richland CountyX
Saline CountyX
Wabash CountyX
Wayne CountyX
White CountyX
Williamson CountyX
AQCR 75:
Christian County:
South Fork TwpX
All other twpsX
Sangamon County:
Capital TwpX
Cooper TwpX
Cotton Hill TwpX
Rochester TwpX
Woodside TwpX
All other twpsX
Adams CountyX
Brown CountyX
Calhoun CountyX
Cass CountyX
Greene CountyX
Jersey CountyX
Logan CountyX
Macon CountyX
Nacoupin CountyX
Menard CountyX
Montgomery CountyX
Morgan CountyX
Pike CountyX
Schuyler CountyX
Scott CountyX

Illinois—2010 Sulfur Dioxide NAAQS

[Primary]

Designated area 1 Designation
Date 2 Type
Alton Township, IL12/30/2024Attainment.
Madison County (part) Within Alton Township: Area east of Corporal Belchik Memorial Expressway, south of East Broadway, south of Route 3, and north of Route 143
Lemont, IL5/26/2020Attainment.
Cook County (part)
Lemont Township
Will County (part)
DuPage Township and Lockport Township
Pekin, IL5/26/2020Attainment.
Tazewell County (part)
Cincinnati Township and Pekin Township
Peoria County (part)
Hollis Township
Rest of State:
Adams CountyAttainment/Unclassifiable.
Alexander CountyAttainment/Unclassifiable.
Bond CountyAttainment/Unclassifiable.
Boone CountyAttainment/Unclassifiable.
Brown CountyAttainment/Unclassifiable.
Bureau County9/12/2016Attainment/Unclassifiable.
Calhoun CountyAttainment/Unclassifiable.
Carroll CountyAttainment/Unclassifiable.
Cass CountyAttainment/Unclassifiable.
Champaign CountyAttainment/Unclassifiable.
Christian CountyAttainment/Unclassifiable.
Clark CountyAttainment/Unclassifiable.
Clay CountyAttainment/Unclassifiable.
Clinton CountyAttainment/Unclassifiable.
Coles CountyAttainment/Unclassifiable.
Cook County (part) (remainder)Attainment/Unclassifiable.
Crawford CountyAttainment/Unclassifiable.
Cumberland CountyAttainment/Unclassifiable.
De Kalb CountyAttainment/Unclassifiable.
De Witt CountyAttainment/Unclassifiable.
Douglas CountyAttainment/Unclassifiable.
Du Page CountyAttainment/Unclassifiable.
Edgar CountyAttainment/Unclassifiable.
Edwards CountyAttainment/Unclassifiable.
Effingham CountyAttainment/Unclassifiable.
Fayette CountyAttainment/Unclassifiable.
Ford CountyAttainment/Unclassifiable.
Franklin CountyAttainment/Unclassifiable.
Fulton CountyAttainment/Unclassifiable.
Gallatin CountyAttainment/Unclassifiable.
Greene CountyAttainment/Unclassifiable.
Grundy CountyAttainment/Unclassifiable.
Hamilton CountyAttainment/Unclassifiable.
Hancock CountyAttainment/Unclassifiable.
Hardin CountyAttainment/Unclassifiable.
Henderson CountyAttainment/Unclassifiable.
Henry CountyAttainment/Unclassifiable.
Iroquois CountyAttainment/Unclassifiable.
Jackson CountyAttainment/Unclassifiable.
Jasper County9/12/2016Attainment/Unclassifiable.
Jefferson CountyAttainment/Unclassifiable.
Jersey CountyAttainment/Unclassifiable.
Jo Daviess CountyAttainment/Unclassifiable.
Johnson CountyAttainment/Unclassifiable.
Kane CountyAttainment/Unclassifiable.
Kankakee CountyAttainment/Unclassifiable.
Kendall CountyAttainment/Unclassifiable.
Knox CountyAttainment/Unclassifiable.
Lake CountyAttainment/Unclassifiable.
La Salle CountyAttainment/Unclassifiable.
Lawrence CountyAttainment/Unclassifiable.
Lee CountyAttainment/Unclassifiable.
Livingston CountyAttainment/Unclassifiable.
Logan CountyAttainment/Unclassifiable.
McDonough CountyAttainment/Unclassifiable.
McHenry CountyAttainment/Unclassifiable.
McLean CountyAttainment/Unclassifiable.
Macon County4/30/2021Attainment/Unclassifiable.
Macoupin CountyAttainment/Unclassifiable.
Madison County (part) (remainder) 4Attainment/Unclassifiable.
Marion CountyAttainment/Unclassifiable.
Marshall CountyAttainment/Unclassifiable.
Mason CountyAttainment/Unclassifiable.
Massac County9/12/2016Attainment/Unclassifiable.
Menard CountyAttainment/Unclassifiable.
Mercer CountyAttainment/Unclassifiable.
Monroe CountyAttainment/Unclassifiable.
Montgomery CountyAttainment/Unclassifiable.
Morgan CountyAttainment/Unclassifiable.
Moultrie CountyAttainment/Unclassifiable.
Ogle CountyAttainment/Unclassifiable.
Peoria County (part) (remainder)Attainment/Unclassifiable.
Perry CountyAttainment/Unclassifiable.
Piatt CountyAttainment/Unclassifiable.
Pike CountyAttainment/Unclassifiable.
Pope CountyAttainment/Unclassifiable.
Pulaski CountyAttainment/Unclassifiable.
Putnam County9/12/2016Attainment/Unclassifiable.
Randolph CountyAttainment/Unclassifiable.
Richland CountyAttainment/Unclassifiable.
Rock Island CountyAttainment/Unclassifiable.
St. Clair CountyAttainment/Unclassifiable.
Saline CountyAttainment/Unclassifiable.
Sangamon CountyAttainment/Unclassifiable.
Schuyler CountyAttainment/Unclassifiable.
Scott CountyAttainment/Unclassifiable.
Shelby CountyAttainment/Unclassifiable.
Stark CountyAttainment/Unclassifiable.
Stephenson CountyAttainment/Unclassifiable.
Tazewell County (part) (remainder)Attainment/Unclassifiable.
Union CountyAttainment/Unclassifiable.
Vermilion CountyAttainment/Unclassifiable.
Wabash CountyAttainment/Unclassifiable.
Warren CountyAttainment/Unclassifiable.
Washington CountyAttainment/Unclassifiable.
Wayne CountyAttainment/Unclassifiable.
White CountyAttainment/Unclassifiable.
Whiteside CountyAttainment/Unclassifiable.
Will County (part) (remainder)Attainment/Unclassifiable.
Williamson County 3 10/15/2019Attainment/Unclassifiable.
Winnebago CountyAttainment/Unclassifiable.
Woodford 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.

3 Williamson County was initially designated on September 12, 2016. The initial designation was reconsidered and modified on October 15, 2019.

4 A portion of Madison County, specifically all of Wood River Township, and the area in Chouteau Township north of Cahokia Diversion Channel, was designated attainment/unclassifiable on 9/12/2016.

Illinois—Carbon Monoxide

Designated Area Designation Classification
Date 1 Type Date 1 Type
Adams CountyUnclassifiable/Attainment
Alexander CountyUnclassifiable/Attainment
Bond CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Brown CountyUnclassifiable/Attainment
Bureau CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Champaign CountyUnclassifiable/Attainment
Christian CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Coles CountyUnclassifiable/Attainment
Cook CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Cumberland CountyUnclassifiable/Attainment
De Kalb CountyUnclassifiable/Attainment
De Witt CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Du Page CountyUnclassifiable/Attainment
Edgar CountyUnclassifiable/Attainment
Edwards CountyUnclassifiable/Attainment
Effingham CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Ford CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Fulton CountyUnclassifiable/Attainment
Gallatin CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Henderson CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Iroquois CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Jersey CountyUnclassifiable/Attainment
Jo Daviess CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Kane CountyUnclassifiable/Attainment
Kankakee CountyUnclassifiable/Attainment
Kendall CountyUnclassifiable/Attainment
Knox CountyUnclassifiable/Attainment
Lake CountyUnclassifiable/Attainment
La Salle CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Livingston CountyUnclassifiable/Attainment
Logan CountyUnclassifiable/Attainment
Macon CountyUnclassifiable/Attainment
Macoupin CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Massac CountyUnclassifiable/Attainment
McDonough CountyUnclassifiable/Attainment
McHenry CountyUnclassifiable/Attainment
McLean CountyUnclassifiable/Attainment
Menard CountyUnclassifiable/Attainment
Mercer CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Morgan CountyUnclassifiable/Attainment
Moultrie CountyUnclassifiable/Attainment
Ogle CountyUnclassifiable/Attainment
Peoria CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Piatt CountyUnclassifiable/Attainment
Pike CountyUnclassifiable/Attainment
Pope CountyUnclassifiable/Attainment
Pulaski CountyUnclassifiable/Attainment
Putnam CountyUnclassifiable/Attainment
Randolph CountyUnclassifiable/Attainment
Richland CountyUnclassifiable/Attainment
Rock Island CountyUnclassifiable/Attainment
St. Clair CountyUnclassifiable/Attainment
Saline CountyUnclassifiable/Attainment
Sangamon CountyUnclassifiable/Attainment
Schuyler CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Stark CountyUnclassifiable/Attainment
Stephenson CountyUnclassifiable/Attainment
Tazewell CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Vermilion CountyUnclassifiable/Attainment
Wabash CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
White CountyUnclassifiable/Attainment
Whiteside CountyUnclassifiable/Attainment
Will CountyUnclassifiable/Attainment
Williamson CountyUnclassifiable/Attainment
Winnebago CountyUnclassifiable/Attainment
Woodford CountyUnclassifiable/Attainment

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

Illinois—Ozone (1-Hour Standard) 3

Designated area Designation Classification
Date 1 Type Date 1 Type
Chicago-Gary-Lake County Area:
Cook County11/15/1990Nonattainment11/15/1990Severe-17.
Du Page County11/15/1990Nonattainment11/15/1990Severe-17.
Grundy County (part)
Aux Sable Township11/15/1990Nonattainment11/15/1990Severe-17.
Goose Lake Township11/15/1990Nonattainment11/15/1990Severe-17.
Kane County11/15/1990Nonattainment11/15/1990Severe-17.
Kendall County (part)
Oswego Township11/15/1990Nonattainment11/15/1990Severe-17.
Lake County11/15/1990Nonattainment11/15/1990Severe-17.
McHenry County11/15/1990Nonattainment11/15/1990Severe-17.
Will County11/15/1990Nonattainment11/15/1990Severe-17.
Jersey County Area:
Jersey CountyAttainment 2
St. Louis Area:
Madison County5/12/2003Attainment
Monroe County5/12/2003Attainment
St. Clair County5/12/2003Attainment
Adams CountyUnclassifiable/Attainment
Alexander CountyUnclassifiable/Attainment
Bond CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Brown CountyUnclassifiable/Attainment
Bureau CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Champaign CountyUnclassifiable/Attainment
Christian CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Coles CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Cumberland CountyUnclassifiable/Attainment
De Kalb CountyUnclassifiable/Attainment
De Witt CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Edgar CountyUnclassifiable/Attainment
Edwards CountyUnclassifiable/Attainment
Effingham CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Ford CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Fulton CountyUnclassifiable/Attainment
Gallatin CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy County (part) All townships except Aux Sable and Goose LakeUnclassifiable/Attainment
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Henderson CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Iroquois CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Jo Daviess CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Kankakee CountyUnclassifiable/Attainment
Kendall County (part) All townships except OswegoUnclassifiable/Attainment
Knox CountyUnclassifiable/Attainment
La Salle CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Livingston CountyUnclassifiable/Attainment
Logan CountyUnclassifiable/Attainment
Macon CountyUnclassifiable/Attainment
Macoupin CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Massac CountyUnclassifiable/Attainment
McDonough CountyUnclassifiable/Attainment
McLean CountyUnclassifiable/Attainment
Menard CountyUnclassifiable/Attainment
Mercer CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Morgan CountyUnclassifiable/Attainment
Moultrie CountyUnclassifiable/Attainment
Ogle CountyUnclassifiable/Attainment
Peoria CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Piatt CountyUnclassifiable/Attainment
Pike CountyUnclassifiable/Attainment
Pope CountyUnclassifiable/Attainment
Pulaski CountyUnclassifiable/Attainment
Putnam CountyUnclassifiable/Attainment
Randolph CountyUnclassifiable/Attainment
Richland CountyUnclassifiable/Attainment
Rock Island CountyUnclassifiable/Attainment
Saline CountyUnclassifiable/Attainment
Sangamon CountyUnclassifiable/Attainment
Schuyler CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Stark CountyUnclassifiable/Attainment
Stephenson CountyUnclassifiable/Attainment
Tazewell CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Vermilion CountyUnclassifiable/Attainment
Wabash CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
White CountyUnclassifiable/Attainment
Whiteside CountyUnclassifiable/Attainment
Williamson CountyUnclassifiable/Attainment
Winnebago CountyUnclassifiable/Attainment
Woodford CountyUnclassifiable/Attainment

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

2 April 13, 1995.

3 The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in Illinois. The Jersey Co. and St. Louis areas are maintenance areas for the 1-hour NAAQS for purposes of 40 CFR part 51 subpart X.

Illinois—PM-10

Designated area Designation Classification
Date Type Date Type
Cook County
a. Lyons Township11/21/2005Attainment
b. The area bounded on the north by 79th Street, on the west by Interstate 57 between Sibley Boulevard and Interstate 94 and by Interstate 94 between Interstate 57 and 79th Street, on the south by Sibley Boulevard, and on the east by the Illinois/Indiana State line11/21/2005Attainment
LaSalle County10/7/1996Attainment
Oglesby including the following Townships, ranges, and sections: T32N, R1E, S1; T32N, R2E, S6; T33N, R1E, S24; T33N, R1E, S25; T33N, R2E, S30; T33N, R2E, S31; and T33N, R1E, S36
Madison County
Granite City Township and Nameoki Township5/11/1998Attainment
Rest of State11/15/1990Unclassifiable

Illinois—1997 Annual PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date 2 Type
Chicago-Gary-Lake County, IL-IN:10/2/2013Attainment.
Cook County
DuPage County
Grundy County (part):
Goose Lake and Aux Sable Townships
Kane County
Kendall County (part):
Oswego Township
Lake County
McHenry County
Will County
St. Louis, MO-IL:
Madison County5/28/2019Attainment
Monroe County5/28/2019Attainment
Randolph County (part): Baldwin Village5/28/2019Attainment
St. Clair County5/28/2019Attainment
Rest of State:
Adams CountyUnclassifiable/Attainment.
Alexander CountyUnclassifiable/Attainment.
Bond CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Brown CountyUnclassifiable/Attainment.
Bureau CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Champaign CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Coles CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
De Witt CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
Edgar CountyUnclassifiable/Attainment.
Edwards CountyUnclassifiable/Attainment.
Effingham CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Ford CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Fulton CountyUnclassifiable/Attainment.
Gallatin CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy County (remainder)Unclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Henderson CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Iroquois CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jersey CountyUnclassifiable/Attainment.
Jo Daviess CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Kankakee CountyUnclassifiable/Attainment.
Kendall County (remainder)Unclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
La Salle CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
Logan CountyUnclassifiable/Attainment.
McDonough CountyUnclassifiable/Attainment.
McLean CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Macoupin CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Mason CountyUnclassifiable/Attainment.
Massac CountyUnclassifiable/Attainment.
Menard CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
Moultrie CountyUnclassifiable/Attainment.
Ogle CountyUnclassifiable/Attainment.
Peoria CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Piatt CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pope CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Randolph County (remainder)Unclassifiable/Attainment.
Richland CountyUnclassifiable/Attainment.
Rock Island CountyUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Sangamon CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stark CountyUnclassifiable/Attainment.
Stephenson CountyUnclassifiable/Attainment.
Tazewell CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Vermilion CountyUnclassifiable/Attainment.
Wabash CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
White CountyUnclassifiable/Attainment.
Whiteside CountyUnclassifiable/Attainment.
Williamson CountyUnclassifiable/Attainment.
Winnebago CountyUnclassifiable/Attainment.
Woodford 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.

Illinois—2012 Annual PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Chicago, IL-IN:
Cook CountyUnclassifiable/Attainment.
DuPage CountyUnclassifiable/Attainment.
Grundy County (part)Unclassifiable/Attainment.
Goose Lake and Aux Sable TownshipsUnclassifiable/Attainment.
Kane CountyUnclassifiable/Attainment.
Kendall County (part)Unclassifiable/Attainment.
Oswego TownshipUnclassifiable/Attainment.
Lake CountyUnclassifiable/Attainment.
McHenry CountyUnclassifiable/Attainment.
Will CountyUnclassifiable/Attainment.
Davenport-Moline-Rock Island, IL:
Rock Island CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
St. Louis, MO-IL:
Madison CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Randolph County (part)Unclassifiable/Attainment.
Baldwin VillageUnclassifiable/Attainment.
St. Clair CountyUnclassifiable/Attainment.
Rest of State:
Adams CountyUnclassifiable/Attainment.
Alexander CountyUnclassifiable/Attainment.
Bond CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Brown CountyUnclassifiable/Attainment.
Bureau CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Champaign CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Coles CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
De Witt CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
Edgar CountyUnclassifiable/Attainment.
Edwards CountyUnclassifiable/Attainment.
Effingham CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Ford CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Fulton CountyUnclassifiable/Attainment.
Gallatin CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy County (remainder)Unclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Henderson CountyUnclassifiable/Attainment.
Iroquois CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jersey CountyUnclassifiable/Attainment.
Jo Daviess CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Kankakee CountyUnclassifiable/Attainment.
Kendall County (remainder)Unclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
La Salle CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
Logan CountyUnclassifiable/Attainment.
McDonough CountyUnclassifiable/Attainment.
McLean CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Macoupin CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Mason CountyUnclassifiable/Attainment.
Massac CountyUnclassifiable/Attainment.
Menard CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
Moultrie CountyUnclassifiable/Attainment.
Ogle CountyUnclassifiable/Attainment.
Peoria CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Piatt CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pope CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Randolph County (remainder)Unclassifiable/Attainment.
Richland CountyUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Sangamon CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stark CountyUnclassifiable/Attainment.
Stephenson CountyUnclassifiable/Attainment.
Tazewell CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Vermilion CountyUnclassifiable/Attainment.
Wabash CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
White CountyUnclassifiable/Attainment.
Whiteside CountyUnclassifiable/Attainment.
Williamson CountyUnclassifiable/Attainment.
Winnebago CountyUnclassifiable/Attainment.
Woodford CountyUnclassifiable/Attainment.

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

2 This date is January 28, 2019, unless otherwise noted.

Illinois—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Adams CountyUnclassifiable/Attainment.
Alexander CountyUnclassifiable/Attainment.
Bond CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Brown CountyUnclassifiable/Attainment.
Bureau CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Champaign CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Coles CountyUnclassifiable/Attainment.
Cook CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
De Witt CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
DuPage CountyUnclassifiable/Attainment.
Edgar CountyUnclassifiable/Attainment.
Edwards CountyUnclassifiable/Attainment.
Effingham CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Ford CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Fulton CountyUnclassifiable/Attainment.
Gallatin CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Henderson CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Iroquois CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jersey CountyUnclassifiable/Attainment.
Jo Daviess CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Kane CountyUnclassifiable/Attainment.
Kankakee CountyUnclassifiable/Attainment.
Kendall CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
La Salle CountyUnclassifiable/Attainment.
Lake CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
Logan CountyUnclassifiable/Attainment.
McDonough CountyUnclassifiable/Attainment.
McHenry CountyUnclassifiable/Attainment.
McLean CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Macoupin CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Mason CountyUnclassifiable/Attainment.
Massac CountyUnclassifiable/Attainment.
Menard CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
Moultrie CountyUnclassifiable/Attainment.
Ogle CountyUnclassifiable/Attainment.
Peoria CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Piatt CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pope CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Randolph CountyUnclassifiable/Attainment.
Richland CountyUnclassifiable/Attainment.
Rock Island CountyUnclassifiable/Attainment.
St. Clair CountyUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Sangamon CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stark CountyUnclassifiable/Attainment.
Stephenson CountyUnclassifiable/Attainment.
Tazewell CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Vermilion CountyUnclassifiable/Attainment.
Wabash CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
White CountyUnclassifiable/Attainment.
Whiteside CountyUnclassifiable/Attainment.
Will CountyUnclassifiable/Attainment.
Williamson CountyUnclassifiable/Attainment.
Winnebago CountyUnclassifiable/Attainment.
Woodford 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.

Illinois—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification
Date 1 Type Date Type
Statewide:
Adams CountyUnclassifiable/Attainment
Alexander CountyUnclassifiable/Attainment
Bond CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Brown CountyUnclassifiable/Attainment
Bureau CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Champaign CountyUnclassifiable/Attainment
Christian CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Coles CountyUnclassifiable/Attainment
Cook CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Cumberland CountyUnclassifiable/Attainment
DeKalb CountyUnclassifiable/Attainment
De Witt CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
DuPage CountyUnclassifiable/Attainment
Edgar CountyUnclassifiable/Attainment
Edwards CountyUnclassifiable/Attainment
Effingham CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Ford CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Fulton CountyUnclassifiable/Attainment
Gallatin CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy CountyUnclassifiable/Attainment
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Henderson CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Iroquois CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Jersey CountyUnclassifiable/Attainment
Jo Daviess CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Kane CountyUnclassifiable/Attainment
Kankakee CountyUnclassifiable/Attainment
Kendall CountyUnclassifiable/Attainment
Knox CountyUnclassifiable/Attainment
La Salle CountyUnclassifiable/Attainment
Lake CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Livingston CountyUnclassifiable/Attainment
Logan CountyUnclassifiable/Attainment
McDonough CountyUnclassifiable/Attainment
McHenry CountyUnclassifiable/Attainment
McLean CountyUnclassifiable/Attainment
Macon CountyUnclassifiable/Attainment
Macoupin CountyUnclassifiable/Attainment
Madison CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Massac CountyUnclassifiable/Attainment
Menard CountyUnclassifiable/Attainment
Mercer CountyUnclassifiable/Attainment
Monroe CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Morgan CountyUnclassifiable/Attainment
Moultrie CountyUnclassifiable/Attainment
Ogle CountyUnclassifiable/Attainment
Peoria CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Piatt CountyUnclassifiable/Attainment
Pike CountyUnclassifiable/Attainment
Pope CountyUnclassifiable/Attainment
Pulaski CountyUnclassifiable/Attainment
Putnam CountyUnclassifiable/Attainment
Randolph CountyUnclassifiable/Attainment
Richland CountyUnclassifiable/Attainment
Rock Island CountyUnclassifiable/Attainment
St. Clair CountyUnclassifiable/Attainment
Saline CountyUnclassifiable/Attainment
Sangamon CountyUnclassifiable/Attainment
Schuyler CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Stark CountyUnclassifiable/Attainment
Stephenson CountyUnclassifiable/Attainment
Tazewell CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Vermilion CountyUnclassifiable/Attainment
Wabash CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
White CountyUnclassifiable/Attainment
Whiteside CountyUnclassifiable/Attainment
Will CountyUnclassifiable/Attainment
Williamson CountyUnclassifiable/Attainment
Winnebago CountyUnclassifiable/Attainment
Woodford 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.

Illinois—NO2 (1971 Annual Standard)

Designated area Does not meet primary standards Cannot be classified or better than national standards
AQCR 65:
Fulton CountyX
Hancock CountyX
Henderson CountyX
Knox CountyX
McDonough CountyX
Mason CountyX
Peoria CountyX
Tazewell CountyX
Warren CountyX
Woodford CountyX
Lee CountyX
AQCR 66:
Champaign CountyX
Clark CountyX
Coles CountyX
Cumberland CountyX
De Witt CountyX
Douglas CountyX
Edgar CountyX
Ford CountyX
Iroquois CountyX
Livingston CountyX
McLean CountyX
Moultrie CountyX
Piatt CountyX
Shelby CountyX
Vermilion CountyX
AQCR 67:
Cook CountyX
Du Page CountyX
Grundy CountyX
Kane CountyX
Kankakee CountyX
Kendall CountyX
Lake CountyX
McHenry CountyX
Will CountyX
AQCR 68:
Jo Daviess CountyX
AQCR 69:
Carroll CountyX
Henry CountyX
Mercer CountyX
Rock Island CountyX
Whiteside CountyX
AQCR 70:
Bond CountyX
Clinton CountyX
Madison CountyX
Monroe CountyX
Randolph CountyX
St. Clair CountyX
Washington CountyX
AQCR 71:
Bureau CountyX
La Salle CountyX
Lee CountyX
Marshall CountyX
Putnam CountyX
Stark CountyX
AQCR 72:
Alexander CountyX
Johnson CountyX
Massac CountyX
Pope CountyX
Pulaski CountyX
Union CountyX
AQCR 73:
Boone CountyX
De Kalb CountyX
Ogle CountyX
Stephenson CountyX
Winnebago CountyX
AQCR 74:
Clay CountyX
Crawford CountyX
Edwards CountyX
Effingham CountyX
Fayette CountyX
Franklin CountyX
Gallatin CountyX
Hamilton CountyX
Hardin CountyX
Jackson CountyX
Jasper CountyX
Jefferson CountyX
Lawrence CountyX
Marion CountyX
Perry CountyX
Richland CountyX
Saline CountyX
Wabash CountyX
Wayne CountyX
White CountyX
Williamson CountyX
AQCR 75:
Adams CountyX
Brown CountyX
Calhoun CountyX
Cass CountyX
Christian CountyX
Greene CountyX
Jersey CountyX
Logan CountyX
Macon CountyX
Macoupin CountyX
Menard CountyX
Montgomery CountyX
Morgan CountyX
Pike CountyX
Sangamon CountyX
Schuyler CountyX
Scott CountyX

Illinois—NO2 (2010 1-Hour Standard)

Designated area Designation a
Date 1 Type
Adams CountyUnclassifiable/Attainment.
Alexander CountyUnclassifiable/Attainment.
Bond CountyUnclassifiable/Attainment.
Boone CountyUnclassifiable/Attainment.
Brown CountyUnclassifiable/Attainment.
Bureau CountyUnclassifiable/Attainment.
Calhoun CountyUnclassifiable/Attainment.
Carroll CountyUnclassifiable/Attainment.
Cass CountyUnclassifiable/Attainment.
Champaign CountyUnclassifiable/Attainment.
Christian CountyUnclassifiable/Attainment.
Clark CountyUnclassifiable/Attainment.
Clay CountyUnclassifiable/Attainment.
Clinton CountyUnclassifiable/Attainment.
Coles CountyUnclassifiable/Attainment.
Cook CountyUnclassifiable/Attainment.
Crawford CountyUnclassifiable/Attainment.
Cumberland CountyUnclassifiable/Attainment.
DeKalb CountyUnclassifiable/Attainment.
De Witt CountyUnclassifiable/Attainment.
Douglas CountyUnclassifiable/Attainment.
DuPage CountyUnclassifiable/Attainment.
Edgar CountyUnclassifiable/Attainment.
Edwards CountyUnclassifiable/Attainment.
Effingham CountyUnclassifiable/Attainment.
Fayette CountyUnclassifiable/Attainment.
Ford CountyUnclassifiable/Attainment.
Franklin CountyUnclassifiable/Attainment.
Fulton CountyUnclassifiable/Attainment.
Gallatin CountyUnclassifiable/Attainment.
Greene CountyUnclassifiable/Attainment.
Grundy CountyUnclassifiable/Attainment.
Hamilton CountyUnclassifiable/Attainment.
Hancock CountyUnclassifiable/Attainment.
Hardin CountyUnclassifiable/Attainment.
Henderson CountyUnclassifiable/Attainment.
Henry CountyUnclassifiable/Attainment.
Iroquois CountyUnclassifiable/Attainment.
Jackson CountyUnclassifiable/Attainment.
Jasper CountyUnclassifiable/Attainment.
Jefferson CountyUnclassifiable/Attainment.
Jersey CountyUnclassifiable/Attainment.
Jo Daviess CountyUnclassifiable/Attainment.
Johnson CountyUnclassifiable/Attainment.
Kane CountyUnclassifiable/Attainment.
Kankakee CountyUnclassifiable/Attainment.
Kendall CountyUnclassifiable/Attainment.
Knox CountyUnclassifiable/Attainment.
La Salle CountyUnclassifiable/Attainment.
Lake CountyUnclassifiable/Attainment.
Lawrence CountyUnclassifiable/Attainment.
Lee CountyUnclassifiable/Attainment.
Livingston CountyUnclassifiable/Attainment.
Logan CountyUnclassifiable/Attainment.
Madison CountyUnclassifiable/Attainment.
McDonough CountyUnclassifiable/Attainment.
McLean CountyUnclassifiable/Attainment.
Macon CountyUnclassifiable/Attainment.
Macoupin CountyUnclassifiable/Attainment.
Marion CountyUnclassifiable/Attainment.
Marshall CountyUnclassifiable/Attainment.
Mason CountyUnclassifiable/Attainment.
Massac CountyUnclassifiable/Attainment.
McHenry CountyUnclassifiable/Attainment.
Menard CountyUnclassifiable/Attainment.
Mercer CountyUnclassifiable/Attainment.
Monroe CountyUnclassifiable/Attainment.
Montgomery CountyUnclassifiable/Attainment.
Morgan CountyUnclassifiable/Attainment.
Moultrie CountyUnclassifiable/Attainment.
Ogle CountyUnclassifiable/Attainment.
Peoria CountyUnclassifiable/Attainment.
Perry CountyUnclassifiable/Attainment.
Piatt CountyUnclassifiable/Attainment.
Pike CountyUnclassifiable/Attainment.
Pope CountyUnclassifiable/Attainment.
Pulaski CountyUnclassifiable/Attainment.
Putnam CountyUnclassifiable/Attainment.
Randolph CountyUnclassifiable/Attainment.
Richland CountyUnclassifiable/Attainment.
Rock Island CountyUnclassifiable/Attainment.
St. Clair CountyUnclassifiable/Attainment.
Saline CountyUnclassifiable/Attainment.
Sangamon CountyUnclassifiable/Attainment.
Schuyler CountyUnclassifiable/Attainment.
Scott CountyUnclassifiable/Attainment.
Shelby CountyUnclassifiable/Attainment.
Stark CountyUnclassifiable/Attainment.
Stephenson CountyUnclassifiable/Attainment.
Tazewell CountyUnclassifiable/Attainment.
Union CountyUnclassifiable/Attainment.
Vermilion CountyUnclassifiable/Attainment.
Wabash CountyUnclassifiable/Attainment.
Warren CountyUnclassifiable/Attainment.
Washington CountyUnclassifiable/Attainment.
Wayne CountyUnclassifiable/Attainment.
White CountyUnclassifiable/Attainment.
Whiteside CountyUnclassifiable/Attainment.
Will CountyUnclassifiable/Attainment.
Williamson CountyUnclassifiable/Attainment.
Winnebago CountyUnclassifiable/Attainment.
Woodford 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.

Illinois—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation a Category/classification
Date 1 Type Date 1 Type
Chicago-Gary-Lake County, IL-IN:
Cook County8/13/2012
DuPage CountyAttainment
Grundy County (part)
Aux Sable Township
Goose Lake Township
Kane County
Kendall County (part)
Oswego Township
Lake County
McHenry County
Will County
St. Louis, MO-IL:
Jersey County6/12/2012Attainment
Madison County6/12/2012Attainment
Monroe County6/12/2012Attainment
St. Clair County6/12/2012Attainment
Rest of State
Adams CountyUnclassifiable/Attainment
Alexander CountyUnclassifiable/Attainment
Bond CountyUnclassifiable/Attainment
Boone CountyUnclassifiable/Attainment
Brown CountyUnclassifiable/Attainment
Bureau CountyUnclassifiable/Attainment
Calhoun CountyUnclassifiable/Attainment
Carroll CountyUnclassifiable/Attainment
Cass CountyUnclassifiable/Attainment
Champaign CountyUnclassifiable/Attainment
Christian CountyUnclassifiable/Attainment
Clark CountyUnclassifiable/Attainment
Clay CountyUnclassifiable/Attainment
Clinton CountyUnclassifiable/Attainment
Coles CountyUnclassifiable/Attainment
Crawford CountyUnclassifiable/Attainment
Cumberland CountyUnclassifiable/Attainment
De Witt CountyUnclassifiable/Attainment
DeKalb CountyUnclassifiable/Attainment
Douglas CountyUnclassifiable/Attainment
Edgar CountyUnclassifiable/Attainment
Edwards CountyUnclassifiable/Attainment
Effingham CountyUnclassifiable/Attainment
Fayette CountyUnclassifiable/Attainment
Ford CountyUnclassifiable/Attainment
Franklin CountyUnclassifiable/Attainment
Fulton CountyUnclassifiable/Attainment
Gallatin CountyUnclassifiable/Attainment
Greene CountyUnclassifiable/Attainment
Grundy County (part)Unclassifiable/Attainment
All townships except Aux Sable and Goose Lake.
Hamilton CountyUnclassifiable/Attainment
Hancock CountyUnclassifiable/Attainment
Hardin CountyUnclassifiable/Attainment
Henderson CountyUnclassifiable/Attainment
Henry CountyUnclassifiable/Attainment
Iroquois CountyUnclassifiable/Attainment
Jackson CountyUnclassifiable/Attainment
Jasper CountyUnclassifiable/Attainment
Jefferson CountyUnclassifiable/Attainment
Jo Daviess CountyUnclassifiable/Attainment
Johnson CountyUnclassifiable/Attainment
Kankakee CountyUnclassifiable/Attainment
Kendall County (part)Unclassifiable/Attainment
All townships except Oswego
Knox CountyUnclassifiable/Attainment
La Salle CountyUnclassifiable/Attainment
Lawrence CountyUnclassifiable/Attainment
Lee CountyUnclassifiable/Attainment
Livingston CountyUnclassifiable/Attainment
Logan CountyUnclassifiable/Attainment
Macon CountyUnclassifiable/Attainment
Macoupin CountyUnclassifiable/Attainment
Marion CountyUnclassifiable/Attainment
Marshall CountyUnclassifiable/Attainment
Mason CountyUnclassifiable/Attainment
Massac CountyUnclassifiable/Attainment
McDonough CountyUnclassifiable/Attainment
McLean CountyUnclassifiable/Attainment
Menard CountyUnclassifiable/Attainment
Mercer CountyUnclassifiable/Attainment
Montgomery CountyUnclassifiable/Attainment
Morgan CountyUnclassifiable/Attainment
Moultrie CountyUnclassifiable/Attainment
Ogle CountyUnclassifiable/Attainment
Peoria CountyUnclassifiable/Attainment
Perry CountyUnclassifiable/Attainment
Piatt CountyUnclassifiable/Attainment
Pike CountyUnclassifiable/Attainment
Pope CountyUnclassifiable/Attainment
Pulaski CountyUnclassifiable/Attainment
Putnam CountyUnclassifiable/Attainment
Randolph CountyUnclassifiable/Attainment
Richland CountyUnclassifiable/Attainment
Rock Island CountyUnclassifiable/Attainment
Saline CountyUnclassifiable/Attainment
Sangamon CountyUnclassifiable/Attainment
Schuyler CountyUnclassifiable/Attainment
Scott CountyUnclassifiable/Attainment
Shelby CountyUnclassifiable/Attainment
Stark CountyUnclassifiable/Attainment
Stephenson CountyUnclassifiable/Attainment
Tazewell CountyUnclassifiable/Attainment
Union CountyUnclassifiable/Attainment
Vermilion CountyUnclassifiable/Attainment
Wabash CountyUnclassifiable/Attainment
Warren CountyUnclassifiable/Attainment
Washington CountyUnclassifiable/Attainment
Wayne CountyUnclassifiable/Attainment
White CountyUnclassifiable/Attainment
Whiteside CountyUnclassifiable/Attainment
Williamson CountyUnclassifiable/Attainment
Winnebago CountyUnclassifiable/Attainment
Woodford CountyUnclassifiable/Attainment

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

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

Illinois—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area Designation Classification
Date 1 Type Date 1 Type
Chicago-Naperville, IL-IN-WI 2May 20, 2022.AttainmentSerious.
Cook County.
DuPage County.
Grundy County (part):
Aux Sable Township.
Goose Lake Township.
Kane County.
Kendall County (part):
Oswego Township.
Lake County.
McHenry County.
Will County.
St. Louis-St. Charles-Farmington, MO-IL: 2
Madison County, Monroe County, St. Clair County3/1/2018Attainment
Adams County 3Unclassifiable/Attainment
Alexander County 3Unclassifiable/Attainment
Bond County 3Unclassifiable/Attainment
Boone County 3Unclassifiable/Attainment
Brown County 3Unclassifiable/Attainment
Bureau County 3Unclassifiable/Attainment
Calhoun County 3Unclassifiable/Attainment
Carroll County 3Unclassifiable/Attainment
Cass County 3Unclassifiable/Attainment
Champaign County 3Unclassifiable/Attainment
Christian County 3Unclassifiable/Attainment
Clark County 3Unclassifiable/Attainment
Clay County 3Unclassifiable/Attainment
Clinton County 3Unclassifiable/Attainment
Coles County 3Unclassifiable/Attainment
Crawford County 3Unclassifiable/Attainment
Cumberland County 3Unclassifiable/Attainment
DeKalb County 3Unclassifiable/Attainment
De Witt County 3Unclassifiable/Attainment
Douglas County 3Unclassifiable/Attainment
Edgar County 3Unclassifiable/Attainment
Edwards County 3Unclassifiable/Attainment
Effingham County 3Unclassifiable/Attainment
Fayette County 3Unclassifiable/Attainment
Ford County 3Unclassifiable/Attainment
Franklin County 3Unclassifiable/Attainment
Fulton County 3Unclassifiable/Attainment
Gallatin County 3Unclassifiable/Attainment
Greene County 3Unclassifiable/Attainment
Grundy County (remainder) 3Unclassifiable/Attainment
Hamilton County 3Unclassifiable/Attainment
Hancock County 3Unclassifiable/Attainment
Hardin County 3Unclassifiable/Attainment
Henderson County 3Unclassifiable/Attainment
Henry County 3Unclassifiable/Attainment
Iroquois County 3Unclassifiable/Attainment
Jackson County 3Unclassifiable/Attainment
Jasper County 3Unclassifiable/Attainment
Jefferson County 3Unclassifiable/Attainment
Jersey County 3Unclassifiable/Attainment
Jo Daviess County 3Unclassifiable/Attainment
Johnson County 3Unclassifiable/Attainment
Kankakee County 3Unclassifiable/Attainment
Kendall County (remainder)Unclassifiable/Attainment
Knox County 3Unclassifiable/Attainment
La Salle County 3Unclassifiable/Attainment
Lawrence County 3Unclassifiable/Attainment
Lee County 3Unclassifiable/Attainment
Livingston County 3Unclassifiable/Attainment
Logan County 3Unclassifiable/Attainment
McDonough County 3Unclassifiable/Attainment
McLean County 3Unclassifiable/Attainment
Macon County 3Unclassifiable/Attainment
Macoupin County 3Unclassifiable/Attainment
Marion County 3Unclassifiable/Attainment
Marshall County 3Unclassifiable/Attainment
Mason County 3Unclassifiable/Attainment
Massac County 3Unclassifiable/Attainment
Menard County 3Unclassifiable/Attainment
Mercer County 3Unclassifiable/Attainment
Montgomery County 3Unclassifiable/Attainment
Morgan County 3Unclassifiable/Attainment
Moultrie County 3Unclassifiable/Attainment
Ogle County 3Unclassifiable/Attainment
Peoria County 3Unclassifiable/Attainment
Perry County 3Unclassifiable/Attainment
Piatt County 3Unclassifiable/Attainment
Pike County 3Unclassifiable/Attainment
Pope County 3Unclassifiable/Attainment
Pulaski County 3Unclassifiable/Attainment
Putnam County 3Unclassifiable/Attainment
Randolph County 3Unclassifiable/Attainment
Richland County 3Unclassifiable/Attainment
Rock Island County 3Unclassifiable/Attainment
Saline County 3Unclassifiable/Attainment
Sangamon County 3Unclassifiable/Attainment
Schuyler County 3Unclassifiable/Attainment
Scott County 3Unclassifiable/Attainment
Shelby County 3Unclassifiable/Attainment
Stark County 3Unclassifiable/Attainment
Stephenson County 3Unclassifiable/Attainment
Tazewell County 3Unclassifiable/Attainment
Union County 3Unclassifiable/Attainment
Vermilion County 3Unclassifiable/Attainment
Wabash County 3Unclassifiable/Attainment
Warren County 3Unclassifiable/Attainment
Washington County 3Unclassifiable/Attainment
Wayne County 3Unclassifiable/Attainment
White County 3Unclassifiable/Attainment
Whiteside County 3Unclassifiable/Attainment
Williamson County 3Unclassifiable/Attainment
Winnebago County 3Unclassifiable/Attainment
Woodford County 3Unclassifiable/Attainment

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

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

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

4 Attainment date is extended to July 20, 2016.

Illinois—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area 1 Designation Classification
Date 2 Type Date 2 Type
Chicago, IL-IN-WI: 3 7/14/2021Nonattainment1/16/2025Serious.
Cook County.
DuPage County.
Grundy County (part):
Aux Sable Township and Goose Lake Township.
Kane County.
Kendall County (part):
Oswego Township.
Lake County.
McHenry County.
Will County.
St. Louis, MO-IL:
Madison County.
Monroe CountyJuly 14, 2021. 3
St. Clair County.
Adams County1/16/2018Attainment/Unclassifiable
Alexander County1/16/2018Attainment/Unclassifiable
Bond CountyAttainment/Unclassifiable
Boone County1/16/2018Attainment/Unclassifiable
Brown County1/16/2018Attainment/Unclassifiable
Bureau CountyAttainment/Unclassifiable
Calhoun CountyAttainment/Unclassifiable
Carroll County1/16/2018Attainment/Unclassifiable
Cass County1/16/2018Attainment/Unclassifiable
Champaign County1/16/2018Attainment/Unclassifiable
Christian County1/16/2018Attainment/Unclassifiable
Clark County1/16/2018Attainment/Unclassifiable
Clay County1/16/2018Attainment/Unclassifiable
Clinton CountyAttainment/Unclassifiable
Coles County1/16/2018Attainment/Unclassifiable
Crawford County1/16/2018Attainment/Unclassifiable
Cumberland County1/16/2018Attainment/Unclassifiable
De Kalb CountyAttainment/Unclassifiable
De Witt County1/16/2018Attainment/Unclassifiable
Douglas County1/16/2018Attainment/Unclassifiable
Edgar County1/16/2018Attainment/Unclassifiable
Edwards County1/16/2018Attainment/Unclassifiable
Effingham County1/16/2018Attainment/Unclassifiable
Fayette County1/16/2018Attainment/Unclassifiable
Ford County1/16/2018Attainment/Unclassifiable
Franklin County1/16/2018Attainment/Unclassifiable
Fulton County1/16/2018Attainment/Unclassifiable
Gallatin County1/16/2018Attainment/Unclassifiable
Greene County1/16/2018Attainment/Unclassifiable
Grundy County (part) remainderAttainment/Unclassifiable
Hamilton County1/16/2018Attainment/Unclassifiable
Hancock County1/16/2018Attainment/Unclassifiable
Hardin County1/16/2018Attainment/Unclassifiable
Henderson County1/16/2018Attainment/Unclassifiable
Henry County1/16/2018Attainment/Unclassifiable
Iroquois County1/16/2018Attainment/Unclassifiable
Jackson County1/16/2018Attainment/Unclassifiable
Jasper County1/16/2018Attainment/Unclassifiable
Jefferson County1/16/2018Attainment/Unclassifiable
Jersey CountyAttainment/Unclassifiable
Jo Daviess County1/16/2018Attainment/Unclassifiable
Johnson County1/16/2018Attainment/Unclassifiable
Kankakee CountyAttainment/Unclassifiable
Kendall County (part) remainderAttainment/Unclassifiable
Knox County1/16/2018Attainment/Unclassifiable
La Salle CountyAttainment/Unclassifiable
Lawrence County1/16/2018Attainment/Unclassifiable
Lee County1/16/2018Attainment/Unclassifiable
Livingston County1/16/2018Attainment/Unclassifiable
Logan County1/16/2018Attainment/Unclassifiable
Macon County1/16/2018Attainment/Unclassifiable
Macoupin CountyAttainment/Unclassifiable
Marion CountyAttainment/Unclassifiable
Marshall County1/16/2018Attainment/Unclassifiable
Mason County1/16/2018Attainment/Unclassifiable
Massac County1/16/2018Attainment/Unclassifiable
McDonough County1/16/2018Attainment/Unclassifiable
McLean County1/16/2018Attainment/Unclassifiable
Menard County1/16/2018Attainment/Unclassifiable
Mercer County1/16/2018Attainment/Unclassifiable
Montgomery County1/16/2018Attainment/Unclassifiable
Morgan County1/16/2018Attainment/Unclassifiable
Moultrie County1/16/2018Attainment/Unclassifiable
Ogle County1/16/2018Attainment/Unclassifiable
Peoria County1/16/2018Attainment/Unclassifiable
Perry County1/16/2018Attainment/Unclassifiable
Piatt County1/16/2018Attainment/Unclassifiable
Pike County1/16/2018Attainment/Unclassifiable
Pope County1/16/2018Attainment/Unclassifiable
Pulaski County1/16/2018Attainment/Unclassifiable
Putnam CountyAttainment/Unclassifiable
Randolph County1/16/2018Attainment/Unclassifiable
Richland County1/16/2018Attainment/Unclassifiable
Rock Island County1/16/2018Attainment/Unclassifiable
Saline County1/16/2018Attainment/Unclassifiable
Sangamon County1/16/2018Attainment/Unclassifiable
Schuyler County1/16/2018Attainment/Unclassifiable
Scott County1/16/2018Attainment/Unclassifiable
Shelby County1/16/2018Attainment/Unclassifiable
Stark County1/16/2018Attainment/Unclassifiable
Stephenson County1/16/2018Attainment/Unclassifiable
Tazewell County1/16/2018Attainment/Unclassifiable
Union County1/16/2018Attainment/Unclassifiable
Vermilion County1/16/2018Attainment/Unclassifiable
Wabash County1/16/2018Attainment/Unclassifiable
Warren County1/16/2018Attainment/Unclassifiable
Washington County1/16/2018Attainment/Unclassifiable
Wayne County1/16/2018Attainment/Unclassifiable
White County1/16/2018Attainment/Unclassifiable
Whiteside County1/16/2018Attainment/Unclassifiable
Williamson County1/16/2018Attainment/Unclassifiable
Winnebago County1/16/2018Attainment/Unclassifiable
Woodford 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.

Illinois—2008 Lead NAAQS

Designated area Designation for the 2008 NAAQS a
Date 1 Type
Chicago, IL:
Cook County (part)3/28/2018Attainment.
Area bounded by Damen Ave. on the west, Roosevelt Rd. on the north, the Dan Ryan Expressway on the east, and the Stevenson Expressway on the south
Granite City, IL:
Madison County (part)3/28/2018Attainment.
Area is bounded by Granite City Township and Venice Township
Rest of StateUnclassifiable/Attainment.

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

1 December 31, 2011 unless otherwise noted.

[43 FR 8964, Mar. 3, 1978] Editorial Note:For Federal Register citations affecting § 81.314, 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 81.314
© 2014 CustomsMobile | Disclaimer | Privacy | About