SIP Status Reports

You are here: EPA Home > Air Quality Implementation Plans > SIP Status Reports > Status of Illinois Designated Areas

Status of Illinois Designated Areas

Illinois Areas by NAAQS
As of 12/05/2020

Jump to Illinois section for: CO (1971) Lead (1978) Lead (2008) NO2 (1971) Ozone-1Hr (1979) Ozone-8Hr (1997) Ozone-8Hr (2008) Ozone-8Hr (2015) PM-10 (1987) PM-2.5 (1997) PM-2.5 (2006) PM-2.5 (2012) SO2 (1971) SO2 (2010)


Illinois CO (1971) Areas     Return to map
 
No designated areas for this pollutant.

Illinois Lead (1978) Areas     Return to map Top of page

No designated areas for this pollutant.

Illinois Lead (2008) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(µg/m3)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Chicago Maintenance 12/31/2011   35,696 2017-2019 0.01 Yes 6 / 1 10/23/2015
80 FR 51127
09/22/2016 03/28/2018
83 FR 13198
Granite City Maintenance 12/31/2010   38,901 2017-2019 0.15 Yes 6 / 1 03/28/2018
83 FR 13198
09/22/2016 03/28/2018
83 FR 13198

Illinois NO2 (1971) Areas     Return to map Top of page

No designated areas for this pollutant.

Illinois Ozone-1Hr (1979) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Chicago-Gary-Lake County Area Nonattainment (NAAQS revoked) 11/15/1990 Severe-17 8,361,740 2017-2019 0.100 Yes 30 / 29 01/29/2009
73 FR 79652
01/30/2007  
Jersey County Area Maintenance (NAAQS revoked) 01/06/1992 Marginal 22,985 2017-2019 0.087 Yes 4 / 4  
 
11/12/1993 04/13/1995
60 FR 13634
St. Louis Area Maintenance (NAAQS revoked) 11/15/1990 Serious 572,295 2017-2019 0.098 Yes 27 / 21  
 
12/30/2002 05/12/2003
68 FR 25442

Illinois Ozone-8Hr (1997) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Chicago-Gary-Lake County Area Maintenance (NAAQS revoked) 06/15/2004 Subpart 2/Moderate 8,389,546 2017-2019 0.075 Yes 53 / 49 04/12/2010
75 FR 12088
07/23/2009 08/13/2012
77 FR 48062
St. Louis Area Maintenance (NAAQS revoked) 06/15/2004 Subpart 2/Moderate 595,280 2017-2019 0.071 Yes 53 / 49 07/11/2011
76 FR 33647
05/26/2010 06/12/2012
77 FR 34819

Illinois Ozone-8Hr (2008) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Chicago-Naperville Nonattainment 07/20/2012 Serious 8,389,546 2017-2019 0.075 Yes 59 / 5  
 
05/06/2020  
St. Louis-St. Charles-Farmington Maintenance 07/20/2012 Marginal 572,295 2017-2019 0.071 Yes 3 / 2 08/26/2016
81 FR 41444
05/08/2017 03/01/2018
83 FR 8756

Illinois Ozone-8Hr (2015) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(ppm)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Chicago Nonattainment 08/03/2018 Marginal 8,076,475 2017-2019 0.075 No 3 / 1  
 
   
St. Louis Nonattainment 08/03/2018 Marginal 539,338 2017-2019 0.071 No 3 / 1  
 
   

Illinois PM-10 (1987) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Average
Estimated
Exceedances
(est. exc.)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Cook County; Lyons Township Maintenance 11/15/1990 Moderate 111,688 2017-2019   Insufficient Data 3 / 3  
 
08/02/2005 11/21/2005
70 FR 55541
Cook County; Southeast Chicago (see 40 CFR 81.314, PM-10 table, Cook County entry b. for description) Maintenance 11/15/1990 Moderate 3,117 2017-2019   Insufficient Data 3 / 3  
 
08/02/2005 11/21/2005
70 FR 55545
LaSalle County; Oglesby Maintenance 11/15/1990 Moderate 3,862 2017-2019   No Data 3 / 3  
 
01/09/1996 10/07/1996
61 FR 41342
Madison County; Granite City Township and Nameoki Township Maintenance 11/15/1990 Moderate 35,652 2017-2019 0.0 Yes 3 / 3  
 
03/20/1996 05/11/1998
63 FR 11842

Illinois PM-2.5 (1997) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual
(µg/m3)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Chicago-Gary-Lake County Maintenance (NAAQS revoked) 04/05/2005 Former Subpart 1 8,389,546 2017-2019 10.8 Yes 5 / 1 10/02/2013
78 FR 60704
10/15/2010 10/02/2013
78 FR 60704
St. Louis Maintenance (NAAQS revoked) 04/05/2005 Moderate 573,748 2017-2019 10.3 Yes 8 / 1 07/27/2012
77 FR 38183
12/06/2018 05/28/2019
84 FR 24395

Illinois PM-2.5 (2006) Areas     Return to map Top of page

No designated areas for this pollutant.

Illinois PM-2.5 (2012) Areas     Return to map Top of page

No designated areas for this pollutant.

Illinois SO2 (1971) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
Design Value
Annual/24-Hr
(ppb)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Peoria County: Hollis twp Maintenance 03/03/1978   2,032     /     0 / 0  
 
11/10/1994 06/05/1995
60 FR 16996
Peoria County: Peoria Maintenance 03/03/1978   127,507     /     0 / 0  
 
11/10/1994 06/05/1995
60 FR 16996
Tazewell County: Groveland twp Maintenance 03/03/1978   22,991     /     0 / 0  
 
11/10/1994 06/05/1995
60 FR 16996

Illinois SO2 (2010) Areas    Return to map     Top of page

Click on the Area name
to view SIP Required Elements


Area
Status Designation
Date
Classification 2010
Population
(state portion)
Meets NAAQS
Basis
3 Year
1-⁠Hour
Design Value
(ppb)
(entire area)
Meets
NAAQS
SIP
Requirements
Original/
Approved
Clean Air
Determination
Citation
Effective Date
Click to view
FR notice
Redesignation
Request Date
Redesignation
Citation
Effective Date
Click to view
FR notice
Alton Township Nonattainment 09/12/2016   0 2017-2019   No Data 6 / 0  
 
   
Lemont Maintenance 10/04/2013   168,916 2017-2019 6 Yes 6 / 5 05/26/2020
85 FR 31378
05/30/2019 05/26/2020
85 FR 31378
Pekin Maintenance 10/04/2013   41,194 2017-2019   Insufficient Data 6 / 5 05/26/2020
85 FR 31378
05/30/2019 05/26/2020
85 FR 31378
We have made our best effort to ensure that the data contained in these reports is accurate. We note that there may be brief delays in updating the reports as we receive new state submissions and we take rulemaking action on plans. In order to assist us in providing accurate information, we request that you contact us by clicking on the "Contact Us" link near the top of this page with any comments regarding or corrections to the posted information, including concerns about whether the entries reflect the most recent status.

Current and historical design value data can be found on the EPA Air Quality Design Values website and the EPA Green Book contains comprehensive nonattainment area, designation status, and historical information.

The level of the 1-hour NAAQS for sulfur dioxide is 75 parts per billion (ppb) calculated as the 3-year average of the 99th percentile of the annual distribution of daily maximum 1-hour average concentrations.