Document ID: EPA-HQ-OAR-2019-0011-0012
Agency: epa
Document Type: Rule
Title: Reconsideration of the Area Designation for the 2010 1-Hour Sulfur Dioxide Primary National Ambient Air Quality Standard for Williamson County, IL
Posted Date: 2019-09-13T04:00Z

[Federal Register Volume 84, Number 178 (Friday, September 13, 2019)]
[Rules and Regulations]
[Pages 48286-48290]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-19782]

[[Page 48286]]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 81

[EPA-HQ-OAR-2019-0011; FRL-9999-60-OAR]
RIN 2060-AU14

Reconsideration of the Area Designation for the 2010 1-Hour 
Sulfur Dioxide (SO2) Primary National Ambient Air Quality Standard for 
Williamson County, Illinois

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: The Environmental Protection Agency (EPA) has completed its 
reconsideration of the nonattainment designation under the Clean Air 
Act (CAA) for the Williamson County, Illinois area for the 2010 1-hour 
sulfur dioxide (SO2) primary national ambient air quality 
standard (NAAQS). On June 30, 2016, the EPA Administrator signed a 
final action that designated the Williamson County, Illinois area as 
nonattainment based on a review of available information. On September 
12, 2016, Southern Illinois Power Cooperative (SIPC), the owner of the 
largest source of SO2 emissions in the area (the Marion 
Power Station), submitted to the EPA an updated modeling analysis that 
characterized SO2 air quality in the area at the time of the 
final designation action. The EPA has reviewed that modeling and 
concludes the available information demonstrates that, as of the date 
of the Administrator's signature on the final action, the Williamson 
County, Illinois area was not violating the 2010 1-hour SO2 
NAAQS and was not contributing to a NAAQS violation in a nearby area. 
Therefore, the EPA is changing the initial designation of Williamson 
County, Illinois, from nonattainment to attainment/unclassifiable.

DATES: This final rule is effective on October 15, 2019.

ADDRESSES: The EPA has established a docket for this action under 
Docket ID No. EPA-HQ-OAR-2019-0011. All documents in the docket are 
listed in the index at http://www.regulations.gov website. Although 
listed in the index, some information is not publicly available, e.g., 
Confidential Business Information (CBI) or other information whose 
disclosure is restricted by statute. Certain other material, such as 
copyrighted material, is not placed on the internet and will be 
publicly available only in hard copy form. Publicly available docket 
materials are available either electronically in the docket or in hard 
copy at the EPA Docket Center Reading Room, WJC West Building, Room 
3334, 1301 Constitution Avenue NW, Washington, DC 20004. The hours of 
operation at the EPA Docket Center Reading Room are 8:30 a.m.-4:30 
p.m., Monday-Friday. The telephone number for the EPA Docket Center is 
(202) 566-1744. Air dispersion modeling input and output files are too 
large to post in the docket or on the website and must be requested 
from the EPA Docket Center or the Regional office contacts listed in 
the FOR FURTHER INFORMATION CONTACT section.
    In addition, the EPA has established a website for SO2 
designations rulemakings at: https://www.epa.gov/sulfur-dioxide-designations. The website includes the EPA's final SO2 
designations, as well as state and tribal recommendation letters, the 
EPA's modification letters, technical support documents, responses to 
comments and other related technical information.

FOR FURTHER INFORMATION CONTACT: For further information concerning 
this action, please contact Corey Mocka, U.S. EPA, Office of Air 
Quality Planning and Standards, Air Quality Policy Division, Mail Code 
C539-01, 109 T.W. Alexander Drive, Research Triangle Park, NC 27709; by 
telephone at (919) 541-5142 or by email at mocka.corey@epa.gov.

SUPPLEMENTARY INFORMATION: Throughout this document wherever ``we,'' 
``us,'' or ``our'' is used, we mean the EPA.

Table of Contents

I. Background
II. Response to Comments
III. Final Action
IV. Environmental Justice Concerns
V. Statutory and Executive Order Reviews
    A. Executive Order 12866: Regulatory Planning and Review and 
Executive Order 13563: Improving Regulation and Regulatory Review
    B. Executive Order 13771: Reducing Regulations and Controlling 
Regulatory Costs
    C. Paperwork Reduction Act (PRA)
    D. Regulatory Flexibility Act (RFA)
    E. Unfunded Mandates Reform Act (UMRA)
    F. Executive Order 13132: Federalism
    G. Executive Order 13175: Consultation and Coordination With 
Indian Tribal Government
    H. Executive Order 13045: Protection of Children From 
Environmental Health and Safety Risks
    I. Executive Order 13211: Actions That Significantly Affect 
Energy Supply, Distribution or Use
    J. National Technology Transfer and Advancement Act (NTTAA)
    K. Executive Order 12898: Federal Actions To Address 
Environmental Justice in Minority Populations and Low-Income 
Populations
    L. Congressional Review Act (CRA)
    M. Judicial Review

I. Background

    On June 7, 2019, the EPA proposed to change the initial designation 
of Williamson County, Illinois, from nonattainment to attainment/
unclassifiable. See 84 FR 26627. A detailed analysis of the EPA's 
rationale, which was provided in the notice of proposed rulemaking, is 
hereby incorporated into this notice and will not be restated here. The 
public comment period for this proposed rule ended on July 8, 2019.

II. Response to Comments

    The EPA received one anonymous comment on the proposal, which is 
addressed in this section.
    Comment: In general, the commenter questions the EPA's authority to 
revisit final agency actions in certain circumstances by asserting that 
the EPA cannot reconsider a final agency action that has already become 
effective and where statutory deadlines have already been implicated by 
EPA's action. Because the EPA's final rule designating Williamson 
County as nonattainment has been in effect for almost 3 years, the 
commenter implies that the only way to change the area's designation is 
for the state to request redesignation under the CAA. Lastly, the 
commenter argues that air dispersion modeling to reconsider the prior 
designation must use actual SO2 emissions from the most 
recent 3 years of data and should consider potential emissions, whereas 
the modeling used as the basis for the EPA's proposal evaluated Marion 
Power Station's 2013-2015 actual SO2 emissions.
    Response: The EPA's ability to revisit previous final actions is 
well-grounded in the law. Specifically, the EPA has inherent authority 
to reconsider, repeal, or revise past decisions to the extent permitted 
by law so long as the agency provides a reasoned explanation. See, 
e.g., Encino Motorcars LLC v. Navarro, 136 S.Ct. 2117, 2125 (2016). 
This is true when, as is the case here, review is undertaken ``in 
response to . . . a change in administrations.'' National Cable & 
Telecommunications Ass'n v.

[[Page 48287]]

Brand X Internet Services, 545 U.S. 967, 981 (2005). Indeed, 
``[a]gencies obviously have broad discretion to reconsider a regulation 
at any time'' and an agency ``is free to do so as long as `the new 
policy is permissible under the statute . . ., there are good reasons 
for it, and . . . the agency believes it to be better.' '' Clean Air 
Council v. Pruitt, 862 F.3d 1, 8-9 (D.C. Cir. 2017) (quoting FCC v. Fox 
Television Stations, Inc., 556 U.S. 502, 515 (2009)). Here, the EPA 
changed its view regarding whether, as an exercise of the agency's 
discretion in this particular matter, it would be appropriate to 
reconsider this designation based on information that was submitted to 
the EPA after the close of the public comment period and that had not 
been demonstrated to be impracticable to raise within such time, but 
which upon review appeared to reflect better information regarding air 
quality in the area at the time of the initial designation than the 
information that formed the basis for the agency's prior determination. 
The EPA thinks that this change in this particular circumstance leads 
to a more accurate determination, as it results in a designation that 
is based on the most complete and informative information regarding the 
area's air quality at the time of the EPA's initial designation. The 
EPA also notes that its authority to reconsider prior decisions exists 
regardless of whether the final agency action has already become 
effective, though the initial action remains effective until the action 
reconsidering it is finalized. The 2016 nonattainment designation 
becoming effective and triggering planning requirements does not 
preclude the EPA from reconsidering that action. The EPA is 
reconsidering the Williamson County area's initial designation for the 
2010 SO2 NAAQS under its inherent reconsideration authority. 
It is not redesignating the area pursuant to its authority under CAA 
section 107(d)(3) authority, and, therefore, the requirements of 
section 107(d)(3) do not apply to this action.\1\ Thus, to the extent 
the comment discusses what requirements apply to and what information 
is relevant to redesignation actions under CAA section 107(d)(3), those 
comments are outside the scope of this action.\2\
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    \1\ The EPA is also not reconsidering this area's designation 
under CAA section 307(d). The Round 2 designations final action is 
not a CAA section 307(d) rule.
    \2\ The EPA also would like to correct the commenter's statement 
regarding the error correction petition that the EPA received 
regarding the initial designation. The EPA neither granted nor 
denied that error correction petition in the EPA's letter responding 
to receipt of the petition. Moreover, with this final action 
revising the designation at issue in that petition, that petition 
and the previous reconsideration petition are now moot.
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    Regarding the appropriate use of SO2 emissions data, the 
EPA's SO2 NAAQS Designations Modeling Technical Assistance 
Document outlines our longstanding rationale for using actual emissions 
in modeling for designations, and we hereby incorporate that rationale 
in support of basing our reconsidered designation on such actual 
emissions modeling.\3\ Marion Power Station's 2013-2015 actual 
SO2 emissions data are representative of conditions in the 
area at the time of the final designation action for Williamson County 
on June 30, 2016, and the air quality for the area at that time is what 
we were evaluating for that designation. Because this action is a 
reconsideration of the initial designation for this area that occurred 
in 2016, rather than a redesignation based on an evaluation of current 
air quality, it is reasonable for our analysis of the air quality and 
the resulting designation to be based on modeling of actual emissions 
from that same time, rather than of more recent emissions.\4\ 
Therefore, as outlined in the proposed action, the modeling 
appropriately demonstrates that the Williamson County area was not 
violating the 2010 1-hour SO2 NAAQS and was not contributing 
to a NAAQS violation in a nearby area at the time of our initial 
designation in 2016.
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    \3\ https://www.epa.gov/sites/production/files/2016-04/documents/so2modelingtad.pdf.
    \4\ Nevertheless, the EPA notes that SO2 emissions 
from the Marion Power Station have been declining, from a 2013 to 
2015 average of 7,081 tons per year (See Docket Item No. EPA-HQ-OAR-
2019-0011-0007) to a 2016 to 2018 average of 4,214 tons per year 
(See https://ampd.epa.gov/ampd/). So, the modeling results may be 
conservative.
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III. Final Action

    The EPA is changing the initial designation of Williamson County, 
Illinois for the 2010 1-hour SO2 NAAQS. Based on the 
information available to the EPA, we are finalizing the Williamson 
County, Illinois area's initial designation as attainment/
unclassifiable for that SO2 NAAQS.\5\ This final action 
relieves Illinois of obligations under CAA sections 172, 191, and 192 
to submit a state implementation plan that demonstrates attainment of 
the SO2 NAAQS, because those requirements do not apply to 
areas designated attainment/unclassifiable.
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    \5\ Docket Item No. EPA-HQ-OAR-2019-0011-0006.
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IV. Environmental Justice Concerns

    When the EPA establishes a new or revised NAAQS, the CAA requires 
the EPA to designate all areas of the United States as either 
nonattainment, attainment, or unclassifiable.
    This final action reconsiders the initial nonattainment designation 
for the Williamson County, Illinois area for the 2010 1-hour 
SO2 NAAQS. Area designations address environmental justice 
concerns by ensuring that the public is properly informed about the air 
quality in an area. In locations where air quality does not meet the 
NAAQS, the CAA requires relevant state authorities to initiate 
appropriate air quality management actions to ensure that all those 
residing, working, attending school, or otherwise present in those 
areas are protected, regardless of minority and economic status.

V. Statutory and Executive Order Reviews

A. Executive Order 12866: Regulatory Planning and Review and Executive 
Order 13563: Improving Regulation and Regulatory Review

    This action is exempt from review by the Office of Management and 
Budget because it is a reconsideration of an initial action taken 
pursuant to the CAA requirement to promulgate air quality designations 
after promulgation of a new or revised NAAQS. This final rule is not a 
significant regulatory action under Executive Order 12866.

B. Executive Order 13771: Reducing Regulations and Controlling 
Regulatory Costs

    This action is not an Executive Order 13771 regulatory action 
because actions such as air quality designations after promulgating a 
new revised NAAQS are exempt under Executive Order 12866.

C. Paperwork Reduction Act (PRA)

    This action does not impose an information collection burden under 
the PRA. In this action, the EPA reconsiders the SO2 NAAQS 
designation for the Williamson County, Illinois area promulgated 
previously on July 12, 2016. The action does not encompass any 
information collection activities.

D. Regulatory Flexibility Act (RFA)

    This action will not have a significant economic impact on a 
substantial number of small entities under the RFA. This action will 
not impose any requirements on small entities. NAAQS designations do 
not in and of themselves create any new requirements beyond what is 
mandated by the CAA. Instead, this rulemaking only makes factual 
determinations, and does not directly regulate any entities.

[[Page 48288]]

E. Unfunded Mandates Reform Act (UMRA)

    This action does not contain any unfunded mandate as described in 
the Unfunded Mandates Reform Act, 2 U.S.C. 1531-1538 and does not 
significantly or uniquely affect small governments. The action imposes 
no enforceable duty on any state, local, or tribal governments or the 
private sector.

F. Executive Order 13132: Federalism

    This action does not have federalism implications. It will not have 
substantial direct effects on the states, on the relationship between 
the national government and the states, or on the distribution of power 
and responsibilities among the various levels of government. The 
division of responsibility between the federal government and the 
states for purposes of implementing the NAAQS is established under the 
CAA.

G. Executive Order 13175: Consultation and Coordination With Indian 
Tribal Government

    This action does not have tribal implications, as specified in 
Executive Order 13175. This action concerns the designation of 
Williamson County, Illinois for the 2010 1-hour SO2 NAAQS. 
This rule does not have a substantial direct effect on one or more 
Indian tribes. This action changes the initial designation for 
Williamson County for the 2010 1-hour SO2 NAAQS, but no 
areas of Indian country are designated or have their designation 
changed by this action. There are no areas of Indian country in or near 
Williamson County. Furthermore, this rule does not affect the 
relationship or distribution of power and responsibilities between the 
federal government and Indian tribes. The CAA and the Tribal Authority 
Rule establish the relationship of the federal government and tribes in 
developing plans to attain the NAAQS, and this rule does nothing to 
modify that relationship. Thus, Executive Order 13175 does not apply.

H. Executive Order 13045: Protection of Children From Environmental 
Health and Safety Risks

    The EPA interprets Executive Order 13045 as applying to those 
regulatory actions that concern environmental health or safety risks 
that the EPA has reason to believe may disproportionately affect 
children, per the definition of ``covered regulatory action'' in 
section 2-202 of the Executive Order. This action is not subject to 
Executive Order 13045 because it does not establish an environmental 
standard intended to mitigate health or safety risks.

I. Executive Order 13211: Actions That Significantly Affect Energy 
Supply, Distribution or Use

    This action is not subject to Executive Order 13211 because it is 
not a significant regulatory action under Executive Order 12866.

J. National Technology Transfer and Advancement Act (NTTAA)

    This rulemaking does not involve technical standards.

K. Executive Order 12898: Federal Actions To Address Environmental 
Justice in Minority Populations and Low-Income Populations

    The EPA believes that this action does not have disproportionately 
high and adverse human health or environmental effects on minority 
populations, low-income populations, and/or indigenous peoples, as 
specified in Executive Order 12898 (59 FR 7629, February 16, 1994). 
When the EPA establishes a new or revised NAAQS, the CAA requires the 
EPA to designate all areas of the U.S. as either nonattainment, 
attainment, or unclassifiable. This action reconsiders the 
nonattainment designation for the Williamson County, Illinois area for 
the 2010 1-hour SO2 NAAQS. Area designations address 
environmental justice concerns by ensuring that the public is properly 
informed about the air quality in an area. In locations where air 
quality does not meet the NAAQS, the CAA requires relevant state 
authorities to initiate appropriate air quality management actions to 
ensure that all those residing, working, attending school, or otherwise 
present in those areas are protected, regardless of minority and 
economic status.

L. Congressional Review Act (CRA)

    This action is subject to the CRA, and the EPA will submit a rule 
report to each House of the Congress and to the Comptroller General of 
the U.S. This action is not a ``major rule'' as defined by 5 U.S.C. 
804(2).

M. Judicial Review

    Under section 307(b)(1) of the CAA, petitions for review of this 
final action must be filed in the U.S. Court of Appeals for the 
appropriate circuit within 60 days from the date this final action is 
published in the Federal Register.

List of Subjects in 40 CFR Part 81

    Environmental protection, Air pollution control, National parks, 
Wilderness areas.

    Dated: September 5, 2019.
Andrew R. Wheeler,
Administrator.
    For the reasons set forth in the preamble, 40 CFR part 81 is 
amended as follows:

PART 81--DESIGNATIONS OF AREAS FOR AIR QUALITY PLANNING PURPOSES

0
1. The authority citation for part 81 continues to read as follows:

    Authority: 42 U.S.C. 7401, et seq.

Subpart C--Section 107 Attainment Status Designations

    2. Section 81.314 is amended by revising the table titled 
``Illinois--2010 Sulfur Dioxide NAAQS (Primary)'' to read as follows:

Sec.  81.314   Illinois.

* * * * *

                                  Illinois--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                       Designation
          Designated area 1 2          -------------------------------------------------------------------------
                                           Date \3\                               Type
----------------------------------------------------------------------------------------------------------------
Alton Township, IL....................         9/12/16  Nonattainment.
    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, IL............................         10/4/13  Nonattainment.
    Cook County (part)................
        Lemont Township...............
    Will County (part)................
        DuPage Township and Lockport
         Township.

[[Page 48289]]

 
Pekin, IL.............................         10/4/13  Nonattainment.
    Tazewell County (part)............
        Cincinnati Township and Pekin
         Township.
    Peoria County (part)..............
        Hollis Township...............
    Adams County......................  ..............  Attainment/Unclassifiable.
    Alexander County..................  ..............  Attainment/Unclassifiable.
    Bond County.......................  ..............  Attainment/Unclassifiable.
    Boone County......................  ..............  Attainment/Unclassifiable.
    Brown County......................  ..............  Attainment/Unclassifiable.
    Bureau County.....................         9/12/16  Attainment/Unclassifiable.
    Calhoun County....................  ..............  Attainment/Unclassifiable.
    Carroll County....................  ..............  Attainment/Unclassifiable.
    Cass County.......................  ..............  Attainment/Unclassifiable.
    Champaign County..................  ..............  Attainment/Unclassifiable.
    Christian County..................  ..............  Attainment/Unclassifiable.
    Clark County......................  ..............  Attainment/Unclassifiable.
    Clay County.......................  ..............  Attainment/Unclassifiable.
    Clinton County....................  ..............  Attainment/Unclassifiable.
    Coles County......................  ..............  Attainment/Unclassifiable.
    Cook County (part) (remainder)....  ..............  Attainment/Unclassifiable.
    Crawford County...................  ..............  Attainment/Unclassifiable.
    Cumberland County.................  ..............  Attainment/Unclassifiable.
    De Kalb County....................  ..............  Attainment/Unclassifiable.
    De Witt County....................  ..............  Attainment/Unclassifiable.
    Douglas County....................  ..............  Attainment/Unclassifiable.
    Du Page County....................  ..............  Attainment/Unclassifiable.
    Edgar County......................  ..............  Attainment/Unclassifiable.
    Edwards County....................  ..............  Attainment/Unclassifiable.
    Effingham County..................  ..............  Attainment/Unclassifiable.
    Fayette County....................  ..............  Attainment/Unclassifiable.
    Ford County.......................  ..............  Attainment/Unclassifiable.
    Franklin County...................  ..............  Attainment/Unclassifiable.
    Fulton County.....................  ..............  Attainment/Unclassifiable.
    Gallatin County...................  ..............  Attainment/Unclassifiable.
    Greene County.....................  ..............  Attainment/Unclassifiable.
    Grundy County.....................  ..............  Attainment/Unclassifiable.
    Hamilton County...................  ..............  Attainment/Unclassifiable.
    Hancock County....................  ..............  Attainment/Unclassifiable.
    Hardin County.....................  ..............  Attainment/Unclassifiable.
    Henderson County..................  ..............  Attainment/Unclassifiable.
    Henry County......................  ..............  Attainment/Unclassifiable.
    Iroquois County...................  ..............  Attainment/Unclassifiable.
    Jackson County....................  ..............  Attainment/Unclassifiable.
    Jasper County.....................         9/12/16  Attainment/Unclassifiable.
    Jefferson County..................  ..............  Attainment/Unclassifiable.
    Jersey County.....................  ..............  Attainment/Unclassifiable.
    Jo Daviess County.................  ..............  Attainment/Unclassifiable.
    Johnson County....................  ..............  Attainment/Unclassifiable.
    Kane County.......................  ..............  Attainment/Unclassifiable.
    Kankakee County...................  ..............  Attainment/Unclassifiable.
    Kendall County....................  ..............  Attainment/Unclassifiable.
    Knox County.......................  ..............  Attainment/Unclassifiable.
    Lake County.......................  ..............  Attainment/Unclassifiable.
    La Salle County...................  ..............  Attainment/Unclassifiable.
    Lawrence County...................  ..............  Attainment/Unclassifiable.
    Lee County........................  ..............  Attainment/Unclassifiable.
    Livingston County.................  ..............  Attainment/Unclassifiable.
    Logan County......................  ..............  Attainment/Unclassifiable.
    McDonough County..................  ..............  Attainment/Unclassifiable.
    McHenry County....................  ..............  Attainment/Unclassifiable.
    McLean County.....................  ..............  Attainment/Unclassifiable.
    Macoupin County...................  ..............  Attainment/Unclassifiable.
    Madison County (part) (remainder)   ..............  Attainment/Unclassifiable.
     \5\.
    Marion County.....................  ..............  Attainment/Unclassifiable.
    Marshall County...................  ..............  Attainment/Unclassifiable.
    Mason County......................  ..............  Attainment/Unclassifiable.
    Massac County.....................         9/12/16  Attainment/Unclassifiable.
    Menard County.....................  ..............  Attainment/Unclassifiable.
    Mercer County.....................  ..............  Attainment/Unclassifiable.

[[Page 48290]]

 
    Monroe County.....................  ..............  Attainment/Unclassifiable.
    Montgomery County.................  ..............  Attainment/Unclassifiable.
    Morgan County.....................  ..............  Attainment/Unclassifiable.
    Moultrie County...................  ..............  Attainment/Unclassifiable.
    Ogle County.......................  ..............  Attainment/Unclassifiable.
    Peoria County (part) (remainder)..  ..............  Attainment/Unclassifiable.
    Perry County......................  ..............  Attainment/Unclassifiable.
    Piatt County......................  ..............  Attainment/Unclassifiable.
    Pike County.......................  ..............  Attainment/Unclassifiable.
    Pope County.......................  ..............  Attainment/Unclassifiable.
    Pulaski County....................  ..............  Attainment/Unclassifiable.
    Putnam County.....................         9/12/16  Attainment/Unclassifiable.
    Randolph County...................  ..............  Attainment/Unclassifiable.
    Richland County...................  ..............  Attainment/Unclassifiable.
    Rock Island County................  ..............  Attainment/Unclassifiable.
    St. Clair County..................  ..............  Attainment/Unclassifiable.
    Saline County.....................  ..............  Attainment/Unclassifiable.
    Sangamon County...................  ..............  Attainment/Unclassifiable.
    Schuyler County...................  ..............  Attainment/Unclassifiable.
    Scott County......................  ..............  Attainment/Unclassifiable.
    Shelby County.....................  ..............  Attainment/Unclassifiable.
    Stark County......................  ..............  Attainment/Unclassifiable.
    Stephenson County.................  ..............  Attainment/Unclassifiable.
    Tazewell County (part) (remainder)  ..............  Attainment/Unclassifiable.
    Union County......................  ..............  Attainment/Unclassifiable.
    Vermilion County..................  ..............  Attainment/Unclassifiable.
    Wabash County.....................  ..............  Attainment/Unclassifiable.
    Warren County.....................  ..............  Attainment/Unclassifiable.
    Washington County.................  ..............  Attainment/Unclassifiable.
    Wayne County......................  ..............  Attainment/Unclassifiable.
    White County......................  ..............  Attainment/Unclassifiable.
    Whiteside County..................  ..............  Attainment/Unclassifiable.
    Will County (part) (remainder)....  ..............  Attainment/Unclassifiable.
    Williamson County.................    \4\ 10/15/19  Attainment/Unclassifiable.
    Winnebago County..................  ..............  Attainment/Unclassifiable.
    Woodford County...................  ..............  Attainment/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\ Macon County will be designated by December 31, 2020.
\3\ This date is April 9, 2018, unless otherwise noted.
\4\ Williamson County was initially designated on September 12, 2016. The initial designation was reconsidered
  and modified on October 15, 2019.
\5\ 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 September 12, 2016.

[FR Doc. 2019-19782 Filed 9-12-19; 8:45 am]
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