Document ID: EPA-R04-OAR-2022-0982-0009
Agency: epa
Document Type: Rule
Title: Air Quality State Implementation Plans; Approvals and Promulgations: Kentcuky; Redesignation of the Northern Kentucky Portion of the Cincinnati, OH-KY 2015 8-Hour Ozone Nonattainment Area to Attainment
Posted Date: 2023-10-04T04:00Z

[Federal Register Volume 88, Number 191 (Wednesday, October 4, 2023)]
[Rules and Regulations]
[Pages 68471-68475]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-21866]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[EPA-R04-OAR-2022-0982; FRL-11119-02-R4]

Air Plan Approval and Air Quality Designation; KY; Redesignation 
of the Northern Kentucky Portion of the Cincinnati, OH-KY 2015 8-Hour 
Ozone Nonattainment Area to Attainment

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: On September 21, 2022, the Commonwealth of Kentucky, through 
the Kentucky Energy and Environment Cabinet (Cabinet), Division of Air 
Quality (DAQ), submitted a request for the Environmental Protection 
Agency (EPA) to redesignate the Northern Kentucky portion (hereinafter 
referred to as the ``Northern Kentucky Area'' or ``Area'') of the 
Cincinnati, Ohio- Kentucky, 2015 8-hour ozone nonattainment area 
(hereinafter referred to as the ``Cincinnati, OH-KY Area'') to 
attainment for the 2015 8-hour ozone National Ambient Air Quality 
Standards (NAAQS or standards) and to approve a State Implementation 
Plan (SIP) revision containing a maintenance plan for the Area. The 
Cabinet submitted this request and SIP revision through a letter dated 
September 20, 2022, and supplemented it on November 22, 2022. EPA is 
approving the Commonwealth's plan for maintaining attainment of the 
2015 8-hour ozone standard in the Northern Kentucky Area, including the 
motor vehicle emission budgets (budgets) for nitrogen oxides 
(NOX) and volatile organic compounds (VOCs) for the years of 
2026 and 2035 for the Area, incorporating the maintenance plan into the 
SIP, and redesignating the Area to attainment for the 2015 8-hour ozone 
NAAQS. EPA previously approved the redesignation request and 
maintenance plan for the Ohio portion of the Cincinnati, OH-KY Area. 
Additionally, EPA finds the 2026 and 2035 budgets for the Area adequate 
for the purpose of transportation conformity.

DATES: This rule is effective November 3, 2023.

ADDRESSES: EPA has established a docket for this action under Docket 
Identification No. EPA-R04-OAR-2022-0982. All documents in the docket 
are listed on the www.regulations.gov website. Although listed in the 
index, some information may not be publicly available, i.e., 
Confidential Business Information 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 through www.regulations.gov or in hard 
copy at the Air Regulatory Management Section, Air Planning and 
Implementation Branch, Air and Radiation Division, U.S. Environmental 
Protection Agency, Region 4, 61 Forsyth Street SW, Atlanta, Georgia 
30303-8960. EPA requests that if at all possible, you contact the 
person listed in the FOR FURTHER INFORMATION CONTACT section to 
schedule your inspection. The Regional Office's official hours of 
business are Monday through Friday 8:30 a.m. to 4:30 p.m., excluding 
Federal holidays.

FOR FURTHER INFORMATION CONTACT: Evan Adams, Air Planning and 
Implementation Branch, Air and Radiation Division, U.S. Environmental 
Protection Agency, Region 4, 61 Forsyth Street SW, Atlanta, Georgia 
30303-8960. The telephone number is (404) 562-9009. Mr. Evan Adams can 
also be reached via electronic mail at [email protected].

SUPPLEMENTARY INFORMATION: 

I. Summary of EPA's Final Actions

    EPA is taking the following separate but related actions addressing 
the September 21, 2022, submittal: (1) approving Kentucky's plan for 
maintaining the 2015 ozone NAAQS (maintenance plan), including the 
associated budgets, in the Northern Kentucky Area and incorporating the 
plan into the SIP, and (2) redesignating the Northern Kentucky Area to 
attainment for the 2015 8-hour ozone NAAQS. EPA also finds the 2026 and 
2035 budgets for the Area adequate for the purpose of transportation 
conformity. The Northern Kentucky Area is composed of portions of 
Boone, Campbell, and Kenton Counties in

[[Page 68472]]

Kentucky. The Cincinnati, OH-KY Area is composed of the Northern 
Kentucky Area and the counties of Butler, Clermont, Hamilton, and 
Warren in Ohio.
    EPA is taking final action to approve Kentucky's maintenance plan 
for the Northern Kentucky Area as meeting the requirements of section 
175A, such approval being one of the Clean Air Act (CAA or Act) 
criteria for redesignating a nonattainment area to attainment, and to 
incorporate it into the SIP. The maintenance plan is designed to keep 
the Area in attainment of the 2015 8-hour ozone NAAQS through 2035. The 
maintenance plan includes 2026 and 2035 budgets for NOX and 
VOCs for the Northern Kentucky Area for transportation conformity 
purposes. EPA is approving these budgets and incorporating them into 
the SIP. EPA is also taking final action to redesignate the Northern 
Kentucky Area to attainment pursuant to section 107(d)(3) of the CAA.
    EPA is also approving the budgets for the Northern Kentucky Area 
through EPA's adequacy process. The Adequacy comment period began on 
September 28, 2022, with EPA's posting of the availability of 
Kentucky's submission on EPA's Adequacy website (https://www.epa.gov/state-and-local-transportation/state-implementation-plans-sip-submissions-currently-under-epa). The Adequacy comment period for these 
budgets closed on October 28, 2022. No comments, adverse or otherwise, 
were received during the Adequacy comment period.

II. Background

    Upon promulgation of a new or revised ozone NAAQS, section 107(d) 
of the CAA requires EPA to designate as nonattainment any area that is 
violating the NAAQS (or that contributes to ambient air quality in a 
nearby area that is violating the NAAQS). As part of the designations 
process for the 2015 8-hour ozone NAAQS, EPA designated the Cincinnati, 
OH-KY Area as a ``Marginal'' ozone nonattainment area, effective August 
3, 2018. See 83 FR 25776 (June 4, 2018). Subsequently, EPA proposed to 
determine that the Cincinnati, OH-KY Area had failed to attain by its 
August 3, 2021, attainment date (based on 2018-2020 air quality 
monitoring data) and to reclassify the Cincinnati, OH-KY Area as a 
Moderate nonattainment area on April 13, 2022. Prior to finalizing the 
determination and reclassification, EPA redesignated the Ohio portion 
of the Cincinnati, OH-KY Area to attainment for the 2015 8-hour ozone 
NAAQS based on 2019-2021 air quality monitoring data. See 87 FR 35104 
(June 9, 2022). EPA finalized the reclassification of the Kentucky 
portion of the Cincinnati, OH-KY Area as Moderate on October 7, 2022 
(87 FR 60897). On September 21, 2022, Kentucky requested that EPA 
redesignate the Northern Kentucky Area to attainment for the 2015 8-
hour ozone NAAQS and submitted a SIP revision containing the 
Commonwealth's plan for maintaining attainment of the 2015 8-hour ozone 
standard in the Area, including 2026 and 2035 budgets for 
NOX and VOC for the Northern Kentucky Area.
    In a notice of proposed rulemaking (NPRM) published on July 28, 
2023 (88 FR 48772), EPA proposed to approve the maintenance plan, 
including the 2026 and 2035 budgets for NOX and VOC, and 
incorporate the plan into the Kentucky SIP and to redesignate the 
Northern Kentucky Area to attainment for the 2015 8-hour ozone NAAQS. 
EPA proposed to redesignate the Area based, in part, on an attaining 
2019-2021 design value of 0.070 ppm for the Cincinnati, OH-KY Area. EPA 
is finalizing the redesignation based on the area's attainment, 
including the 2020-2022 design value of 0.069 ppm for the Cincinnati, 
OH-KY Area.\1\ Preliminary 2023 monitoring data also indicates 
continued attainment of the 2015 8-hour ozone NAAQS. In the NPRM, EPA 
notified the public of the status of the Agency's adequacy 
determination for the NOX and VOC budgets for the Northern 
Kentucky Area. The details of Kentucky's submittal and the rationale 
for EPA's actions are further explained in the NPRM.
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    \1\ EPA reviewed complete, quality-assured, and certified ozone 
monitoring data from monitoring stations in the Cincinnati, OH-KY 
Area for the 2015 8-hour ozone NAAQS for 2020 through 2022 and has 
determined that the design values for each monitor in the Area are 
equal to or less than the standard of 0.070 ppm for that time 
period. Final air quality design values for all criteria pollutants, 
including ozone, are available at https://www.epa.gov/air-trends/air-quality-design-values.
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III. Response to Comments

    Comments on the July 28, 2023, NPRM were due on or before August 
28, 2023. EPA received one set of comments on the NPRM. The commenter 
concurs with the proposed rule, and EPA appreciates the commenter's 
support. EPA responds below to the commenter's general concerns 
regarding vehicle emissions, emissions modeling, and ozone.
    Comment 1: The commenter cautions EPA against ``relying on 
speculative emissions reductions from newer vehicles'' and states that 
multiple real-world tests have found that emissions control devices on 
vehicles can make emissions worse. The commenter also questions the use 
of vehicular emissions modeling rather than real-world measurements as 
it relates to the CAA requirement that states submit a comprehensive, 
accurate, and current inventory of actual emissions from sources of VOC 
and NOX emitted within the boundaries of an ozone 
nonattainment area, and urges EPA to use caution when relying on 
modeling to ``report vehicular-emissions data/MVEBs rather than actual 
testing as models rely on vehicles complying with CFR standards which 
in some cases is not the case.''
    Response 1: In order to redesignate a nonattainment area to 
attainment, the CAA requires EPA to determine that the area has 
attained the applicable NAAQS. See CAA section 107(d)(3)(E)(i). EPA is 
redesignating the Northern Kentucky Area to attainment based on 
complete, quality assured, and certified ozone monitoring data from 
monitoring stations in the Cincinnati, OH-KY Area which show that the 
most recent design values for each monitor in that area are equal to or 
less than the 2015 8-hour ozone NAAQS. EPA did not rely on modeling or 
speculative emission reductions to determine, pursuant to CAA section 
107(d)(3)(E)(i), that the Cincinnati, OH-KY Area has attained this 
NAAQS.
    The commenter's concern about the use of emissions modeling to meet 
the CAA requirement that states submit a comprehensive, accurate, and 
current inventory of actual emissions from sources of VOC and 
NOX emitted within the boundaries of an ozone nonattainment 
area relates to the nonattainment inventory requirement at CAA section 
172(c)(3).\2\ CAA section 182(a)(1) requires states with marginal ozone 
nonattainment areas to submit emissions inventories that comply with 
section 172(c)(3), and all mobile source inventories developed for 2015 
ozone NAAQS implementation should use the latest emissions models 
available at the time that the attainment plan inventory is 
developed.\3\ As discussed in the NPRM, EPA approved the section 
182(a)(1) emissions inventory for the Area in an action published on

[[Page 68473]]

September 30, 2022. See 87 FR 59320. Therefore, any comments regarding 
the use of mobile source modeling in the preparation of Kentucky's 
182(a)(1) inventory are untimely and beyond the scope of this 
rulemaking.
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    \2\ CAA Section 172(c)(3) states ``Such [nonattainment] plan 
provisions shall include a comprehensive, accurate, current 
inventory of actual emissions from all sources of the relevant 
pollutant or pollutants in such area, including such periodic 
revisions as the Administrator may determine necessary to assure 
that the requirements of this part are met.''
    \3\ See, e.g., 83 FR 62998, 63022 (December 6, 2018) (citing the 
CAA section 172(c) requirement that nonattainment area emissions 
inventories be based on the most comprehensive, accurate and current 
information available).
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    On-road mobile source emissions were also used to develop the 
attainment inventory, maintenance demonstration, and budgets included 
in the maintenance plan and were derived from EPA's MOVES model, which 
utilizes, among other things, real-world vehicle emissions test data. 
MOVES is EPA's state-of-the-art model for estimating emissions from on-
road mobile sources for SIP purposes and conformity determinations 
outside of California.\4\ Contrary to the commenter's suggestion that 
vehicle emissions modeling does not reflect their real-world emissions, 
MOVES3 is based on the analyses of millions of emission test results 
and considerable advances in EPA's understanding of vehicle emissions. 
Compared with the prior version of MOVES, MOVES3 incorporates newer 
regulations and significant newer data, including improvements to 
heavy-duty (HD) diesel running emission rates based on manufacturer in-
use testing data from hundreds of HD trucks and updated light-duty 
vehicle emission rates for hydrocarbons, CO, and NOX based 
on in-use testing data. See 86 FR 1106, 1107 (January 7, 2021). 
Consistent with the CAA, MOVES is routinely used to develop budgets \5\ 
as well as attainment inventories and maintenance demonstrations for 
CAA section 175A maintenance plans.\6\ Kentucky used MOVES3, i.e., the 
most recent version of MOVES available at the time that the 
Commonwealth developed its maintenance plan SIP revision, and to the 
extent that commenter is asserting this was improper, EPA does not 
agree for the reasons discussed above. EPA also notes that Kentucky's 
use of MOVES3 in development of this maintenance plan SIP revision was 
consistent with EPA's guidance.\7\
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    \4\ EPA, Policy Guidance on the Use of MOVES3 for State 
Implementation Plan Development, Transportation Conformity, General 
Conformity, and Other Purposes, EPA-420-B-20-044 (November 2020) at 
p.2, available at https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P1010LXH.pdf.
    \5\ See, e.g., id. at p.8; 40 CFR 93.111.
    \6\ See, e.g., ``Procedures for Processing Requests to 
Redesignate Areas to Attainment,'' Memorandum from John Calcagni, 
Director, Air Quality Management Division (September 4, 1992) at 
pp.8-10 (stating that attainment inventories should be consistent 
with EPA's most recent guidance on emissions inventories for 
nonattainment areas and discussing emissions inventory-based 
maintenance demonstrations), available at https://www.epa.gov/sites/default/files/2016-03/documents/calcagni_memo_-_procedures_for_processing_requests_to_redesignate_areas_to_attainment_090492.pdf; infra footnote 7.
    \7\ See, EPA, Policy Guidance on the Use of MOVES3 for State 
Implementation Plan Development, Transportation Conformity, General 
Conformity, and Other Purposes, EPA-420-B-20-044 (November 2020) at 
pp.7-8, available at https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P1010LXH.pdf.
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    Finally, it is unclear how the commenter's concern that ``multiple 
real-world tests have found that emissions control devices on vehicles 
can make emissions worse'' relates to EPA's actions on the 
redesignation request and maintenance plan SIP revision. The impact of 
real-world vehicle emissions is already reflected in the ambient air 
quality data that EPA is using to redesignate the Area, and the MOVES 
modeling used to develop portions of the maintenance plan is based, in 
part, on post-control vehicle emissions.
    Comment 2: The commenter states that there is no safe level of 
ozone and that ``while the monitoring data may indicate attainment, the 
lungs and other organs of Northern Kentuckians will continue to suffer 
permanent (and multigenerational) health damage as a result of ozone 
pollution at any concentration.''
    Response 2: EPA agrees that ozone has many adverse health impacts, 
including reduced lung function and pulmonary inflammation, which may 
lead to emergency room visits and premature deaths. See, e.g., 80 FR 
65292, 65294 (October 26, 2015). However, the commenter does not 
explain how the concerns about the health impacts from ozone exposure 
should influence EPA's actions related to the redesignation of the 
Northern Kentucky Area.
    EPA's redesignation means that air quality in the Cincinnati, OH-KY 
Area meets the 2015 8-hour ozone NAAQS. The NAAQS are designed to 
provide the requisite protection of public health and welfare, under 
section 109(b) of the CAA, and the CAA requires EPA to review the 
standards periodically to determine whether changes are warranted, and 
to respond to requests from states seeking to redesignate areas that 
have attained the standard. EPA has determined that Kentucky has met 
the statutory criteria for redesignation of the Area from nonattainment 
to attainment and is therefore redesignating the Area for the 2015 8-
hour ozone NAAQS. EPA notes that the Agency recently announced a new 
review of the ozone NAAQS to ensure that the NAAQS reflect the most 
current, relevant science and protect human health.\8\
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    \8\ See EPA's August 21, 2023, news release titled ``EPA 
Initiates New Review of the Ozone National Ambient Air Quality 
Standards to Reflect the Latest Science,'' available at https://
www.epa.gov/newsreleases/epa-initiates-new-review-ozone-national-
ambient-air-quality-standards-reflect-
latest#:~:text=In%20October%202021%2C%20EPA%20announced,the%20CASAC%2
0in%20that%20review.
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IV. Final Actions

    EPA is taking the following separate but related final actions. 
First, EPA is approving the maintenance plan for the Northern Kentucky 
Area, including the NOX and VOC budgets for 2026 and 2035, 
and incorporating it into the Kentucky SIP. The maintenance plan 
demonstrates that the Area will continue to maintain the 2015 8-hour 
ozone NAAQS through 2035 and that the budgets meet all the adequacy 
criteria contained in 40 CFR 93.118(e)(4) and (5). Second, EPA is 
approving Kentucky's redesignation request for the 2015 8-hour ozone 
NAAQS for the Northern Kentucky Area. Approval of the redesignation 
request changes the official designation of a portion of Boone, 
Campbell, and Kenton Counties in Kentucky in the Cincinnati, OH-KY Area 
for the 2015 8-hour ozone NAAQS from nonattainment to attainment, as 
found at 40 CFR part 81. EPA previously approved the redesignation 
request and maintenance plan for the Ohio portion of the Cincinnati, 
OH-KY Area. EPA is also approving the newly established NOX 
and VOC budgets for the Northern Kentucky Area and finds the budgets 
adequate for the purpose of transportation conformity. Within 24 months 
from this final rule, the transportation partners for the Northern 
Kentucky Area will need to demonstrate conformity to the new 
NOX and VOC budgets pursuant to 40 CFR 93.104(e).

V. Statutory and Executive Order Reviews

    Under the CAA, redesignation of an area to attainment and the 
accompanying approval of a maintenance plan under section 107(d)(3)(E) 
are actions that affect the status of a geographical area and do not 
impose any additional regulatory requirements on sources beyond those 
imposed by state law. A redesignation to attainment does not in and of 
itself create any new requirements, but rather results in the 
applicability of requirements contained in the CAA for areas that have 
been redesignated to attainment. Moreover, the Administrator is 
required to approve a SIP submission that complies with the provisions 
of the Act and applicable Federal regulations.

[[Page 68474]]

See 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in reviewing SIP 
submissions, EPA's role is to approve state choices, provided that they 
meet the criteria of the CAA. Accordingly, these actions merely approve 
state law as meeting Federal requirements and do not impose additional 
requirements beyond those imposed by state law. For these reasons, 
these actions:
     Are not significant regulatory actions subject to review 
by the Office of Management and Budget under Executive Orders 12866 (58 
FR 51735, October 4, 1993) and 14094 (88 FR 21879, April 11, 2023);
     Do not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     Are certified as not having a significant economic impact 
on a substantial number of small entities under the Regulatory 
Flexibility Act (5 U.S.C. 601 et seq.);
     Do not contain any unfunded mandate or significantly or 
uniquely affect small governments, as described in the Unfunded 
Mandates Reform Act of 1995 (Pub. L. 104-4);
     Do not have Federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Are not subject to Executive Order 13045 (62 FR 19885, 
April 23, 1997) because they are not significant regulatory actions 
under section 3(f)(1) of Executive Order 12866, and because EPA does 
not believe the environmental health or safety risks addressed by these 
actions present a disproportionate risk to children. These actions find 
that the area is attaining the NAAQS and approve a plan for maintaining 
the area's air quality.
     Are not significant regulatory actions subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001); and
     Are not subject to requirements of Section 12(d) of the 
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 
note) because application of those requirements would be inconsistent 
with the CAA.
    In addition, the SIP is not approved to apply on any Indian 
reservation land or in any other area where EPA or an Indian tribe has 
demonstrated that a tribe has jurisdiction. In those areas of Indian 
country, the rule does not have tribal implications and will not impose 
substantial direct costs on tribal governments or preempt tribal law as 
specified by Executive Order 13175 (65 FR 67249, November 9, 2000).
    Executive Order 12898 (Federal Actions to Address Environmental 
Justice in Minority Populations and Low-Income Populations, 59 FR 7629, 
February 16, 1994) directs Federal agencies to identify and address 
``disproportionately high and adverse human health or environmental 
effects'' of their actions on minority populations and low-income 
populations to the greatest extent practicable and permitted by law. 
EPA defines EJ as ``the fair treatment and meaningful involvement of 
all people regardless of race, color, national origin, or income with 
respect to the development, implementation, and enforcement of 
environmental laws, regulations, and policies.'' EPA further defines 
the term fair treatment to mean that ``no group of people should bear a 
disproportionate burden of environmental harms and risks, including 
those resulting from the negative environmental consequences of 
industrial, governmental, and commercial operations or programs and 
policies.''
    Neither the Cabinet nor the Division evaluated EJ as part of its 
redesignation request or SIP submittal; the CAA and applicable 
implementing regulations neither prohibit nor require such an 
evaluation. EPA did not perform an EJ analysis and did not consider EJ 
as part of its actions on the redesignation request and SIP submittal. 
Consideration of EJ is not required as part of these actions, and there 
is no information in the record inconsistent with the stated goal of 
E.O. 12898 of achieving EJ for people of color, low-income populations, 
and Indigenous peoples.
    These actions are subject to the Congressional Review Act, and EPA 
will submit a rule report to each House of the Congress and to the 
Comptroller General of the United States. These actions are not a 
``major rule'' as defined by 5 U.S.C. 804(2).
    Under section 307(b)(1) of the CAA, petitions for judicial review 
of these actions must be filed in the United States Court of Appeals 
for the appropriate circuit by December 4, 2023. Filing a petition for 
reconsideration by the Administrator of this final rule does not affect 
the finality of this action for the purposes of judicial review nor 
does it extend the time within which a petition for judicial review may 
be filed and shall not postpone the effectiveness of such rule or 
action. These actions may not be challenged later in proceedings to 
enforce its requirements. See section 307(b)(2).

List of Subjects

40 CFR Part 52

    Environmental protection, Air pollution control, Incorporation by 
reference, Intergovernmental relations, Nitrogen dioxide, Ozone, 
Reporting and recordkeeping requirements, Volatile organic compounds.

40 CFR Part 81

    Environmental protection, Air pollution control.

    Dated: September 28, 2023.
Jeaneanne Gettle,
Acting Regional Administrator, Region 4.

    For the reasons stated in the preamble, EPA amends 40 CFR parts 52 
and 81 as follows:

PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS

0
1. The authority citation for part 52 continues to read as follows:

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

Subpart S--Kentucky

0
2. In Sec.  52.920(e), amend the table by adding a new entry at the end 
of the table for ``2015 8-hour Ozone Maintenance Plan for the Kentucky 
Portion of the Cincinnati, OH-KY Area'' to read as follows:

Sec.  52.920  Identification of plan.

* * * * *
    (e) * * *

[[Page 68475]]

                                 EPA-Approved Kentucky Non-Regulatory Provisions
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                                                                State
    Name of non-regulatory SIP      Applicable geographic  submittal date/   EPA approval date     Explanations
             provision              or nonattainment area  effective date
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
2015 8-hour Ozone Maintenance Plan  Portions of Boone,          9/21/2022  10/4/2023, [Insert
 for the Kentucky Portion of the     Campbell, and Kenton                   citation of
 Cincinnati, OH-KY Area.             Counties.                              publication].
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PART 81--DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES

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

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

0
4. In Sec.  81.318, amend the table entitled ``Kentucky--2015 8-Hour 
Ozone NAAQS'' by revising the entry for ``Cincinnati, OH-KY,'' to read 
as follows:

Sec.  81.318  Kentucky.

* * * * *

                                                            Kentucky--2015 8-Hour Ozone NAAQS
                                                                 [Primary and secondary]
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                           Designation                                               Classification
        Designated area \1\        ---------------------------------------------------------------------------------------------------------------------
                                                Date \2\                       Type                        Date \2\                       Type
--------------------------------------------------------------------------------------------------------------------------------------------------------
Cincinnati, OH-KY.................  November 8, 2023...............  Attainment..............
Boone County (part):
    The entire county except for
     2010 U.S. Census Tracts
     706.01 and 706.04.
Campbell County (part):
    The entire county except for
     2010 U.S. Census Tracts
     520.01 and 520.02.
Kenton County (part):
    The entire county except for
     2010 US Census Tracts 637.01
     and 637.02.
 
                                                                      * * * * * * *
--------------------------------------------------------------------------------------------------------------------------------------------------------
\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.

* * * * *
[FR Doc. 2023-21866 Filed 10-3-23; 8:45 am]
BILLING CODE 6560-50-P