SIP Status Reports

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Status of Designated Areas for the SO2 (2010) NAAQS

by Area Name, State
As of 12/01/2020




SO2 (2010) Areas    Return to NAAQS selection
 
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Area
State 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
Allegheny PA Nonattainment 10/04/2013   126,934 2017-2019 109 No 6 / 6  
 
   
Alton Township IL Nonattainment 09/12/2016   0 2017-2019   No Data 6 / 0  
 
   
Anne Arundel County and Baltimore County MD Nonattainment 09/12/2016   990,333 2017-2019 10   6 / 0  
 
   
Beaver PA Nonattainment 10/04/2013   14,780 2017-2019 17 Yes 6 / 6  
 
   
Billings MT Maintenance 10/04/2013   2,621 2017-2019 24 Yes 6 / 5 06/09/2016
81 FR 28718
12/14/2015 06/09/2016
81 FR 28718
Campbell-Clermont Counties OH Maintenance 10/04/2013   14,349 2017-2019 11 Yes 6 / 5  
 
08/11/2015 11/21/2016
81 FR 83158
Campbell-Clermont Counties KY Maintenance 10/04/2013   17,571 2017-2019 11 Yes 6 / 3 03/10/2017
82 FR 13227
02/22/2016 03/10/2017
82 FR 13227
Central New Hampshire NH Maintenance 10/04/2013   124,453 2017-2019 15 Yes 6 / 6  
 
03/16/2018 09/20/2019
84 FR 49467
Detroit MI Nonattainment 10/04/2013   254,079 2017-2019 66 Yes 6 / 0  
 
   
Evangeline Parish (Partial) LA Nonattainment 04/09/2018   124 2017-2019   No Data 6 / 0  
 
   
Freestone and Anderson Counties TX Nonattainment 01/12/2017   4,094 2017-2019   No Data 6 / 0  
 
   
Guayama-Salinas PR Nonattainment 04/09/2018   23,401 2017-2019   No Data 6 / 0  
 
   
Hayden AZ Nonattainment 10/04/2013   4,630 2017-2019 226 No 6 / 2  
 
   
Hillsborough County FL Maintenance 10/04/2013   17,477 2017-2019   Insufficient Data 6 / 6  
 
06/12/2018 12/12/2019
84 FR 60927
Hillsborough-Polk County FL Maintenance 04/09/2018   2,191 2017-2019   No Data 6 / 2  
 
02/22/2019 03/23/2020
85 FR 9666
Huntington IN Nonattainment 04/09/2018   20,838 2017-2019   No Data 6 / 0  
 
   
Indiana PA Nonattainment 10/04/2013   92,778 2017-2019 26 Yes 6 / 6  
 
   
Indianapolis IN Maintenance 10/04/2013   388,587 2017-2019 5 Yes 6 / 5 05/21/2020
85 FR 30844
07/10/2017 05/21/2020
85 FR 30844
Jackson County MO Nonattainment 10/04/2013   57,293 2017-2019 10 Yes 6 / 2 07/09/2020
85 FR 41193
   
Jefferson County MO Nonattainment 10/04/2013   61,933 2017-2019 14 Yes 6 / 2 10/13/2017
82 FR 42945
12/27/2017  
Jefferson County KY Maintenance 10/04/2013   3,185 2017-2019 15 Yes 6 / 6  
 
12/09/2019 09/08/2020
85 FR 47670
Lake County OH Maintenance 10/04/2013   230,041 2017-2019 33 Yes 6 / 5  
 
04/09/2018 05/14/2019
84 FR 21253
Lemont IL 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
Marshall WV Maintenance 10/04/2013   20,365 2017-2019 8 Yes 6 / 6  
 
04/18/2020 11/25/2020
85 FR 67661
Miami AZ Nonattainment 10/04/2013   14,995 2017-2019 172 No 6 / 6  
 
   
Morgan County IN Maintenance 10/04/2013   21,365 2017-2019   Insufficient Data 6 / 6  
 
10/10/2019 09/16/2020
85 FR 57736
Muscatine IA Nonattainment 10/04/2013   30,329 2017-2019 25 Yes 6 / 0  
 
   
Muskingum River OH Nonattainment 10/04/2013   4,456 2017-2019   Insufficient Data 6 / 0  
 
   
Nassau County FL Maintenance 10/04/2013   6,217 2017-2019 38 Yes 6 / 6 05/24/2019
84 FR 17085
06/12/2018 05/24/2019
84 FR 17085
Pekin IL 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
Piti-Cabras GU Nonattainment 04/09/2018   6,116 2017-2019   No Data 6 / 0  
 
   
Rhinelander WI Nonattainment 10/04/2013   18,054 2017-2019 36 Yes 6 / 0  
 
   
Rusk and Panola Counties TX Nonattainment 01/12/2017   1,680 2017-2019   No Data 6 / 0  
 
   
San Juan PR Nonattainment 04/09/2018   275,267 2017-2019   No Data 6 / 0  
 
   
Southwest Indiana IN Nonattainment 10/04/2013   5,555 2017-2019 14 Yes 6 / 5  
 
10/24/2018  
St. Bernard Parish LA Nonattainment 10/04/2013   35,897 2017-2019 44 Yes 6 / 6  
 
   
St. Clair MI Nonattainment 09/12/2016   52,102 2017-2019   No Data 6 / 0  
 
   
Steubenville OH Maintenance 10/04/2013   38,854 2017-2019 46 Yes 6 / 6  
 
06/25/2019 11/29/2019
84 FR 65683
Steubenville WV Maintenance 10/04/2013   19,413 2017-2019 46 Yes 6 / 6  
 
08/22/2019 08/12/2020
85 FR 41925
Sullivan County TN Nonattainment 10/04/2013   15,289 2017-2019 79 No 6 / 0  
 
   
Terre Haute IN Maintenance 10/04/2013   53,902 2017-2019 4 Yes 6 / 5  
 
10/24/2018 07/08/2019
84 FR 32317
Titus County TX Nonattainment 01/12/2017   211 2017-2019   No Data 6 / 0  
 
   
Warren PA Nonattainment 10/04/2013   18,056 2017-2019 42 Yes 6 / 6  
 
   
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.