SIP Status Reports
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Status of Designated Areas for the SO2 (2010) NAAQS
Status of Designated Areas for the SO2 (2010) NAAQS
by Area Name, StateNOTE: As of 03/12/2021, these reports are no longer being updated. For the latest information, see the SIP Status Tools.
SO2 (2010) Areas Return to NAAQS selection |
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Click on the Area name to view SIP Required Elements 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 | |
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Alton Township | IL | Nonattainment | 09/12/2016 | 0 | 2017-2019 | No Data | 6 / 0 | |
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Anne Arundel County and Baltimore County | MD | Nonattainment | 09/12/2016 | 990,333 | 2017-2019 | 10 | 6 / 0 | |
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Beaver | PA | Nonattainment | 10/04/2013 | 14,780 | 2017-2019 | 17 | Yes | 6 / 6 | |
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Billings | MT | Maintenance | 10/04/2013 | 2,621 | 2017-2019 | 24 | Yes | 6 / 1 | 06/09/2016 81 FR 28718 |
12/14/2015 | 06/09/2016 81 FR 28718 |
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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 |
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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 |
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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 |
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Detroit | MI | Nonattainment | 10/04/2013 | 254,079 | 2017-2019 | 66 | Yes | 6 / 0 | |
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Evangeline Parish (Partial) | LA | Nonattainment | 04/09/2018 | 124 | 2017-2019 | No Data | 6 / 0 | |
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Freestone and Anderson Counties | TX | Nonattainment | 01/12/2017 | 4,094 | 2017-2019 | No Data | 6 / 0 | |
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Guayama-Salinas | PR | Nonattainment | 04/09/2018 | 23,401 | 2017-2019 | No Data | 6 / 0 | |
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Hayden | AZ | Nonattainment | 10/04/2013 | 4,630 | 2017-2019 | 226 | No | 6 / 2 | |
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Hillsborough County | FL | Maintenance | 10/04/2013 | 17,477 | 2017-2019 | Insufficient Data | 6 / 6 | |
06/12/2018 | 12/12/2019 84 FR 60927 |
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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 |
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Huntington | IN | Nonattainment | 04/09/2018 | 20,838 | 2017-2019 | No Data | 6 / 0 | |
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Indiana | PA | Nonattainment | 10/04/2013 | 92,778 | 2017-2019 | 26 | Yes | 6 / 6 | |
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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 |
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Jackson County | MO | Nonattainment | 10/04/2013 | 57,293 | 2017-2019 | 10 | Yes | 6 / 2 | 07/09/2020 85 FR 41193 |
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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 |
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Lake County | OH | Maintenance | 10/04/2013 | 230,041 | 2017-2019 | 33 | Yes | 6 / 5 | |
04/09/2018 | 05/14/2019 84 FR 21253 |
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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 |
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Marshall | WV | Maintenance | 10/04/2013 | 20,365 | 2017-2019 | 8 | Yes | 6 / 6 | |
04/18/2020 | 11/25/2020 85 FR 67661 |
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Miami | AZ | Nonattainment | 10/04/2013 | 14,995 | 2017-2019 | 172 | No | 6 / 6 | |
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Morgan County | IN | Maintenance | 10/04/2013 | 21,365 | 2017-2019 | Insufficient Data | 6 / 6 | |
10/10/2019 | 09/16/2020 85 FR 57736 |
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Muscatine | IA | Nonattainment | 10/04/2013 | 30,329 | 2017-2019 | 25 | Yes | 6 / 0 | |
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Muskingum River | OH | Nonattainment | 10/04/2013 | 4,456 | 2017-2019 | Insufficient Data | 6 / 0 | |
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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 |
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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 |
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Piti-Cabras | GU | Nonattainment | 04/09/2018 | 6,116 | 2017-2019 | No Data | 6 / 0 | |
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Rhinelander | WI | Nonattainment | 10/04/2013 | 18,054 | 2017-2019 | 36 | Yes | 6 / 0 | |
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Rusk and Panola Counties | TX | Nonattainment | 01/12/2017 | 1,680 | 2017-2019 | No Data | 6 / 0 | |
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San Juan | PR | Nonattainment | 04/09/2018 | 275,267 | 2017-2019 | No Data | 6 / 0 | |
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Southwest Indiana | IN | Nonattainment | 10/04/2013 | 5,555 | 2017-2019 | 14 | Yes | 6 / 5 | |
10/24/2018 | 04/30/2021 86 FR 12107 |
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St. Bernard Parish | LA | Nonattainment | 10/04/2013 | 35,897 | 2017-2019 | 44 | Yes | 6 / 6 | |
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St. Clair | MI | Nonattainment | 09/12/2016 | 52,102 | 2017-2019 | No Data | 6 / 0 | |
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Steubenville | OH | Maintenance | 10/04/2013 | 38,854 | 2017-2019 | 46 | Yes | 6 / 6 | |
06/25/2019 | 11/29/2019 84 FR 65683 |
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Steubenville | WV | Maintenance | 10/04/2013 | 19,413 | 2017-2019 | 46 | Yes | 6 / 6 | |
08/22/2019 | 08/12/2020 85 FR 41925 |
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Sullivan County | TN | Nonattainment | 10/04/2013 | 15,289 | 2017-2019 | 79 | No | 6 / 0 | |
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Terre Haute | IN | Maintenance | 10/04/2013 | 53,902 | 2017-2019 | 4 | Yes | 6 / 5 | |
10/24/2018 | 07/08/2019 84 FR 32317 |
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Titus County | TX | Nonattainment | 01/12/2017 | 211 | 2017-2019 | No Data | 6 / 0 | |
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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. |