Document ID: EPA-HQ-OAR-2020-0037-0113
Agency: epa
Document Type: Rule
Title: Air Quality Designations for the 2010 Primary Sulfur Dioxide (SO2) National Ambient Air Quality Standard - Round 4
Posted Date: 2021-03-26T04:00Z

[Federal Register Volume 86, Number 57 (Friday, March 26, 2021)]
[Rules and Regulations]
[Pages 16055-16075]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-05397]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 81

[EPA-HQ-OAR-2020-0037; FRL-10018-96-OAR]
RIN 2060-AU61

Air Quality Designations for the 2010 Primary Sulfur Dioxide 
(SO2) National Ambient Air Quality Standard--Round 4

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: This final rule establishes the initial air quality 
designations for certain areas in the United States (U.S.) for the 2010 
primary sulfur dioxide (SO2) National Ambient Air Quality 
Standard (NAAQS). The Environmental Protection Agency (EPA) is 
designating the areas as either nonattainment, attainment/
unclassifiable, or unclassifiable. The designations are based on 
application of the EPA's nationwide analytical approach and technical 
analysis, including evaluation of monitoring data and air quality 
modeling, to determine the appropriate designation and area boundary 
based on the weight of evidence for each area. The Clean Air Act (CAA 
or Act) directs areas designated as nonattainment to undertake certain 
planning and pollution control activities to attain the SO2 
NAAQS as expeditiously as practicable. This is the fourth and final set 
of actions to designate areas of the U.S. for the 2010 SO2 
NAAQS; there are no remaining undesignated areas in the U.S. for the 
2010 SO2 NAAQS.

DATES: The final rule is effective on April 30, 2021.

ADDRESSES: The EPA has established a public docket for these 
SO2 designations at https://www.regulations.gov under Docket 
ID No. EPA-HQ-OAR-2020-0037.\1\ Although listed in the docket index, 
some information is not publicly available, e.g., Confidential Business 
Information or other information whose disclosure is restricted by 
statute. Certain other material, such as

[[Page 16056]]

copyrighted material, is not placed on the internet and will be 
publicly available only in hard copy form.
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    \1\ The https://www.regulations.gov platform is in the process 
of being upgraded. Users may be automatically redirected to https://beta.regulations.gov. Both website addresses contain the same 
information.
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    Out of an abundance of caution for members of the public and our 
staff, the EPA Docket Center and Reading Room are currently closed to 
the public, with limited exceptions, to reduce the risk of transmitting 
COVID-19. The Docket Center staff will continue to provide remote 
customer service via email, phone, and webform. For further information 
on EPA Docket Center services and the current status, please visit us 
online at https://www.epa.gov/dockets.

FOR FURTHER INFORMATION CONTACT: For general questions concerning this 
action, please contact Corey Mocka, U.S. Environmental Protection 
Agency, Office of Air Quality Planning and Standards, Air Quality 
Policy Division, 109 T.W. Alexander Drive, Mail Code C539-04, Research 
Triangle Park, NC 27711; telephone: (919) 541-5142; email address: 
mocka.corey@epa.gov. The following EPA contacts can answer questions 
regarding areas in a particular EPA Regional office:
    Region 2--Marina Castro, telephone (212) 637-3713, email at 
castro.marina@epa.gov.
    Region 3--Megan Goold, telephone (215) 814-2027, email at 
goold.megan@epa.gov.
    Region 4--Twunjala Bradley, telephone (404) 562-9352, email at 
bradley.twunjala@epa.gov.
    Region 5--Alisa Liu, telephone (312) 353-3193, email at 
liu.alisa@epa.gov.
    Region 6--Robert Imhoff, telephone (214) 665-7262, email at 
imhoff.robert@epa.gov.
    Region 7--William Stone, telephone (913) 551-7714, email at 
stone.william@epa.gov.
    Region 8--Rebecca Matichuk, telephone (303) 312-6867, email at 
matichuk.rebecca@epa.gov.
    Region 9--Ashley Graham, telephone (415) 972-3877, email at 
graham.ashleyr@epa.gov.
    Region 10--John Chi, telephone (206) 553-1185, email at 
chi.john@epa.gov.

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               Regional offices                    Affected state(s)
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EPA Region 2--Air Programs Branch, 290         New York.
 Broadway, 25th Floor, New York, NY 10007.
EPA Region 3--Planning & Implementation        Maryland, Pennsylvania,
 Branch, 1650 Arch Street, Philadelphia, PA     Virginia, and West
 19103.                                         Virginia.
EPA Region 4--Air Planning & Implementation    Alabama, Georgia,
 Branch, Sam Nunn Atlanta Federal Center, 61    Kentucky, and North
 Forsyth Street SW, 12th Floor, Atlanta, GA     Carolina.
 30303.
EPA Region 5--Air Programs Branch, Air &       Illinois, Indiana, and
 Radiation Division (AR-18J), 77 West Jackson   Wisconsin.
 Blvd., Chicago, IL 60604.
EPA Region 6--State Planning & Implementation  Louisiana, Oklahoma, and
 Branch, 1201 Elm Street, Dallas, TX 75270.     Texas.
EPA Region 7--Air Quality Planning Branch,     Missouri and Nebraska.
 11201 Renner Blvd., Lenexa, KS 66219.
EPA Region 8--Air and Radiation Division, Air  North Dakota and Wyoming.
 Toxics, Radiation, & Modeling Branch, 1595
 Wynkoop Street, Denver, CO 80202.
EPA Region 9--Air Planning Branch, 75          Hawaii.
 Hawthorne Street, San Francisco, CA 94105.
EPA Region 10--Air Planning & State/Tribal     Washington.
 Coordinations Branch, 1200 Sixth Avenue,
 Mail Code OAQ-107, Seattle, WA 98101.
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    Most EPA offices are closed to reduce the risk of transmitting 
COVID-19, but staff remain available via telephone and email. The EPA 
encourages the public to review information related to the Round 4 2010 
SO2 NAAQS designations online at https://www.epa.gov/sulfur-dioxide-designations and also in the public docket at https://www.regulations.gov under Docket ID No. EPA-HQ-OAR-2020-0037.

SUPPLEMENTARY INFORMATION:

Table of Contents

    The following is an outline of the Preamble.
I. Preamble Glossary of Terms and Acronyms
II. What is the purpose of this action?
III. What is the 2010 SO2 NAAQS and what are the health 
concerns that it addresses?
IV. What are the CAA requirements for air quality designations and 
what action has the EPA taken to meet these requirements?
V. What guidance did the EPA issue and how did the EPA apply the 
statutory requirements to determine area designations and 
boundaries?
VI. What air quality information has the EPA used for these 
designations?
VII. How do the Round 4 designations affect areas of Indian country?
VIII. Where can I find information forming the basis for this rule 
and exchanges between the EPA, states, and tribes related to this 
rule?
IX. Environmental Justice Concerns
X. 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. Preamble Glossary of Terms and Acronyms

    The following are abbreviations of terms used in the preamble.
APA Administrative Procedure Act
CAA Clean Air Act
CFR Code of Federal Regulations
CRA Congressional Review Act
DC District of Columbia
DRR Data Requirements Rule
EPA Environmental Protection Agency
FR Federal Register
NAAQS National Ambient Air Quality Standards
NTTAA National Technology Transfer and Advancement Act
ppb Parts per billion
PRA Paperwork Reduction Act
RFA Regulatory Flexibility Act
SIP State Implementation Plan
SO2 Sulfur Dioxide
TAR Tribal Authority Rule
TSD Technical Support Document
UMRA Unfunded Mandate Reform Act
U.S. United States

II. What is the purpose of this action?

    The purpose of this final action is to announce and promulgate 
initial air quality designations for certain areas in the U.S. for the 
2010 SO2 NAAQS, in accordance with the requirements of the 
CAA. The EPA is designating areas as either nonattainment, attainment/

[[Page 16057]]

unclassifiable, or unclassifiable, as defined in Section IV of this 
action, and based on evaluating any available information that was 
timely received, including (but not limited to) appropriate monitoring 
data and modeling analyses.
    On June 2, 2010, the EPA Administrator signed a final rule that 
revised the primary SO2 NAAQS (75 FR 35520; June 22, 2010) 
after review of the existing primary SO2 standards 
promulgated on April 30, 1971 (36 FR 8187). The EPA established the 
revised primary SO2 NAAQS at 75 parts per billion (ppb) 
which is attained when the 3-year average of the annual 99th percentile 
of daily maximum 1-hour average concentrations of SO2 does 
not exceed 75 ppb.
    The process for designating areas following promulgation of a new 
or revised NAAQS is contained in the CAA section 107(d) (42 U.S.C. 
7407(d)). After promulgation of a new or revised NAAQS, each governor 
shall recommend air quality designations, including the appropriate 
boundaries for nonattainment areas, to the EPA.\2\ The EPA considers 
these recommendations as part of its duty to promulgate the formal area 
designations and boundaries for the new or revised NAAQS. By no later 
than 120 days prior to promulgating designations, the EPA is required 
to notify states, territories, and tribes, as appropriate, of any 
intended modifications to an area designation or boundary 
recommendation that the EPA deems necessary.
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    \2\ Tribes are invited to submit recommendations following 
promulgation of a new or revised NAAQS but are not required to do 
so.
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    After invoking a 1-year extension of the deadlines to designate 
areas, as provided for in section 107 of the Act, the EPA completed an 
initial round of SO2 designations for certain areas of the 
country on July 25, 2013 (referred to as ``Round 1'').\3\ Following the 
initial designations, three lawsuits were filed against the EPA in 
different U.S. District Courts, alleging the agency had failed to 
perform a nondiscretionary duty under the CAA by not designating all 
portions of the country by the June 2, 2013, deadline. In one of those 
cases, on March 2, 2015, the U.S. District Court for the Northern 
District of California entered an enforceable order for the EPA to 
complete the area designations by three specific deadlines according to 
the court-ordered schedule.\4\
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    \3\ A total of 29 areas throughout the U.S. were designated in 
this action published on August 5, 2013 (78 FR 47191). The EPA 
designated all 29 areas nonattainment based on violating monitored 
SO2 concentrations from Federal Reference Method and 
Federal Equivalent Method monitors that are sited and operated in 
accordance with 40 CFR parts 50 and 58 and did not at that time 
designate any other areas.
    \4\ Sierra Club v. McCarthy, No. 3-13-cv-3953 (SI) (N.D. Cal. 
March 2, 2015).
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    To meet the first court-ordered deadline, the Administrator signed 
final actions on June 30, 2016, and November 29, 2016, (collectively 
referred to as ``Round 2'') designating additional areas.\5\ To meet 
the second deadline of the court-ordered schedule, the Administrator 
signed final actions on December 21, 2017, and March 28, 2018, 
(collectively referred to as ``Round 3'') designating most of the 
remaining areas of the country.\6\ Finally, the EPA is under a December 
31, 2020, court-ordered deadline, the final of the three deadlines 
established by the court, to designate all remaining undesignated areas 
(collectively referred to as ``Round 4'' or the ``final round''). These 
remaining undesignated areas are: (1) Those areas which, under the 
court order, did not meet the criteria that required designation in 
Round 2 and also were not required to be designated in Round 3 due to 
installation and operation of a new SO2 monitoring network 
by January 2017 in the area meeting EPA's specifications referenced in 
EPA's SO2 Data Requirements Rule (DRR); \7\ and (2) those 
areas which EPA has not otherwise previously designated for the 2010 
SO2 NAAQS. With the completion of Round 4, there are no 
remaining undesignated areas for the 2010 SO2 NAAQS.
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    \5\ A total of 65 areas throughout the U.S. were designated in 
these actions published on July 12, 2016 (81 FR 45039), and December 
13, 2016 (81 FR 89870). Of these 65 areas, seven were designated 
nonattainment.
    \6\ Most remaining areas of the U.S. were designated in actions 
published on January 9, 2018 (83 FR 1098) and April 5, 2018 (83 FR 
14597). Of these areas, six were designated nonattainment.
    \7\ See 80 FR 51052 (August 21, 2015), codified at 40 CFR part 
51, subpart BB.
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    On or about August 13, 2020, consistent with section 
107(d)(1)(b)(ii) of the CAA, the EPA notified affected states of its 
intended designation of certain specific areas as either nonattainment, 
attainment/unclassifiable, or unclassifiable for the 2010 
SO2 NAAQS. These states then had the opportunity to 
demonstrate why they believed an intended modification of their 
original (or updated) recommendations by the EPA may be inappropriate. 
Although not required under the CAA, the EPA also chose to provide an 
opportunity for members of the public to comment on the EPA's August 
2020 intended designations, as the EPA had done for the first, second, 
and third rounds of SO2 designations. The EPA published a 
notice of availability and public comment period for the Round 4 
intended designations on August 21, 2020 (85 FR 51694), and the public 
comment period closed on September 21, 2020.
    The final Round 4 2010 SO2 NAAQS designations and the 
boundaries of each area appear in the tables for each state within the 
regulatory text at the end of this document. State recommendations, 
EPA's August 2020 designation notification letters, and the subsequent 
state and public comments, are available in the public docket for these 
SO2 designations at https://www.regulations.gov under Docket 
ID No. EPA-HQ-OAR-2020-0037. As described in Section VI of this action, 
the EPA may consider early certified 2018-2020 monitoring data that may 
be submitted to the appropriate EPA Regional office by February 15, 
2021.
    For the areas being designated nonattainment, the CAA directs 
states to develop and submit State Implementation Plans (SIPs) to the 
EPA within 18 months of the effective date of this final rule, that 
meet the requirements of sections 172(c) and 191-192 of the CAA and 
provide for attainment of the NAAQS as expeditiously as practicable, 
but not later than 5 years from the effective date of final 
designation.

III. What is the 2010 SO2 NAAQS and what are the health concerns that 
it addresses?

    The EPA revised the primary SO2 NAAQS in a final rule 
published in the Federal Register on June 22, 2010 (75 FR 35520), which 
became effective on August 23, 2010.\8\ Based on review of the air 
quality criteria for oxides of sulfur and the primary NAAQS for oxides 
of sulfur as measured by SO2, the EPA revised the primary 
SO2 NAAQS to provide requisite protection of public health 
with an adequate margin of safety. Specifically, the EPA established a 
new 1-hour SO2 standard at a level of 75 ppb, which is met 
at an ambient air quality monitoring site when the 3-year average of 
the annual 99th percentile of daily maximum 1-hour average 
concentrations is less than or equal to 75 ppb, as determined in 
accordance with Appendix T of 40 CFR part 50, 40 CFR 50.17(a) and (b). 
The EPA also established provisions to revoke both the existing 24-hour 
and annual primary

[[Page 16058]]

SO2 standards, subject to certain conditions, 40 CFR 
50.4(e).
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    \8\ Based on the EPA's review of the air quality criteria 
addressing human health effects and the primary NAAQS for 
SO2, the agency took final action to retain the current 
standard without revision in a final action published in the Federal 
Register on March 18, 2019 (52 FR 9866).
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    Current scientific evidence links short-term exposures to 
SO2, ranging from 5 minutes to 24 hours, with an array of 
adverse respiratory effects including bronchoconstriction and increased 
asthma symptoms. These effects are particularly important for 
asthmatics at elevated ventilation rates (e.g., while exercising or 
playing). Studies also show a connection between short-term exposure 
and increased visits to emergency departments and hospital admissions 
for respiratory illnesses, particularly in at-risk populations 
including children, the elderly and asthmatics.

IV. What are the CAA requirements for air quality designations and what 
action has the EPA taken to meet these requirements?

    After the EPA promulgates a new or revised NAAQS, the EPA is 
required to designate all areas of the country as either nonattainment, 
attainment, or unclassifiable, for that NAAQS pursuant to section 
107(d)(1)-(2) of the CAA. As part of these Round 4 designations, the 
EPA is implementing its interpretation of statutory terms under CAA 
section 107(d) nationwide and is basing these designations on the EPA's 
nationwide analytical approach and technical analysis, including 
evaluation of monitoring data and air quality modeling, applied to the 
available evidence that was timely received for each area.
    Regarding statutory definitions and the EPA's interpretations of 
such, section 107(d)(1)(A)(i) of the CAA defines a nonattainment area 
as an area that does not meet the NAAQS or that contributes to a nearby 
area that does not meet the NAAQS. An attainment area is defined by the 
CAA as any area that meets the NAAQS and does not contribute to a 
nearby area that does not meet the NAAQS. Unclassifiable areas are 
defined by the CAA as those that cannot be classified on the basis of 
available information as meeting or not meeting the 2010 SO2 
NAAQS.
    For the purpose of this action for the 2010 SO2 NAAQS, 
the EPA has interpreted and applied the statutory definitions as 
follows. The EPA defines a nonattainment area as an area that, based on 
available information including (but not limited to) monitoring data 
and/or appropriate modeling analyses, EPA has determined either: (1) 
Does not meet the 2010 SO2 NAAQS, or (2) contributes to 
ambient air quality in a nearby area that does not meet the 2010 
SO2 NAAQS.
    In this action, an attainment/unclassifiable area is defined by the 
EPA as an area that, based on available information including (but not 
limited to) appropriate monitoring data and/or appropriate modeling 
analyses, EPA has determined meets the 2010 SO2 NAAQS and 
does not likely contribute to ambient air quality in a nearby area that 
does not meet the 2010 SO2 NAAQS.
    In this action, an unclassifiable area is defined by the EPA as an 
area for which the available information does not allow the EPA to 
determine whether the area meets the definition of a nonattainment area 
or the definition of an attainment/unclassifiable area.
    This nationwide analytical approach also includes but is not 
limited to: (1) EPA's interpretations of other terms in the context of 
Round 4 of the 2010 SO2 NAAQS; (2) the appropriate basis for 
characterizing the air quality of an area; (3) the five-factor analysis 
(described in Section V of this action) to determine the boundaries for 
each air quality area under the NAAQS; and (4) the methodology for 
appropriately characterizing SO2 air quality through 
monitoring or modeling.
    The EPA notes that CAA section 107(d) provides the agency with 
discretion to determine how best to interpret the terms in the 
definition of a nonattainment area (e.g., ``contributes to'' and 
``nearby'') for a new or revised NAAQS, given considerations such as 
the nature of a specific pollutant, the types of sources that may 
contribute to violations, the form of the standards for the pollutant, 
and other relevant information. In particular, the EPA's position is 
that the statute does not require the agency to establish bright line 
tests or thresholds for what constitutes ``contribution'' or ``nearby'' 
for purposes of designations.\9\
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    \9\ This view was confirmed in Catawba County v. EPA, 571 F.3d 
20 (D.C. Cir. 2009).
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    Similarly, the EPA's position is that the statute permits the EPA 
to evaluate the appropriate application of the term ``area'' to include 
geographic areas based upon full or partial county boundaries, as may 
be appropriate for a particular NAAQS. For example, CAA section 
107(d)(1)(B)(ii) explicitly provides that the EPA can make 
modifications to designation recommendations for an area ``or portions 
thereof,'' and under CAA section 107(d)(1)(B)(iv) a designation remains 
in effect for an area ``or portion thereof'' until the EPA redesignates 
it.
    By no later than 1 year after the promulgation of a new or revised 
NAAQS, CAA section 107(d)(1)(A) provides that each state governor shall 
recommend air quality designations, including the appropriate 
boundaries for areas, to the EPA. The EPA reviews those recommendations 
and is authorized to make any modifications the Administrator deems 
necessary. The statute does not define the term ``necessary,'' but the 
EPA interprets this to authorize the Administrator to modify 
designations that did not meet the statutory requirements or were 
otherwise inconsistent with the facts or analysis deemed appropriate by 
the Administrator. If the EPA is considering modifications to a 
recommendation, we are required by CAA section 107(d)(1)(B)(ii) to 
notify the state of any such intended modifications not less than 120 
days prior to our promulgation of the final designation. These 
notifications are commonly known as the ``120-day letters.'' During 
this period, if the state or territory does not agree with the EPA's 
proposed modification, it has an opportunity to respond to the EPA and 
to demonstrate why it believes the modification proposed by the EPA is 
inappropriate. If a state or territory fails to provide any 
recommendation for an area, in whole or in part, the EPA still must 
promulgate a designation that the Administrator deems appropriate, 
pursuant to CAA section 107(d)(1)(B)(ii). While CAA section 107(d) 
specifically addresses the designations process between the EPA and 
states and territories, the EPA intends to follow the same process to 
the extent practicable for tribes that submitted designation 
recommendations.

V. What guidance did the EPA issue and how did the EPA apply the 
statutory requirements to determine area designations and boundaries?

    In the notice of proposed rulemaking for the revised SO2 
NAAQS (74 FR 64810; December 8, 2009), the EPA issued proposed guidance 
on our approach to implementing the standard, including our approach to 
initial area designations. The EPA solicited comment on that guidance 
and, in the notice of final rulemaking (75 FR 35520; June 22, 2010), 
provided further guidance concerning implementation of the standard and 
how to identify nonattainment areas and boundaries for the 
SO2 NAAQS. Subsequently, on March 24, 2011, the EPA provided 
additional designations guidance to assist states with making their 
recommendations for area designations and boundaries.\10\ The EPA also 
issued

[[Page 16059]]

two additional designations guidance documents on March 20, 2015, and 
July 22, 2016, specific to Round 2 and Round 3 processes and schedules, 
respectively.\11\
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    \10\ See, ``Area Designations for the 2010 Revised Primary 
Sulfur Dioxide National Ambient Air Quality Standards,'' memorandum 
to Regional Air Division Directors, Regions I-X, from Stephen D. 
Page, dated March 24, 2011, available at https://www3.epa.gov/ttn/naaqs/aqmguide/collection/cp2/20110324_page_so2_designations_guidance.pdf.
    \11\ See ``Updated Guidance for Area Designations for the 2010 
Primary Sulfur Dioxide National Ambient Air Quality Standard,'' 
memorandum to Regional Air Division Directors, Regions 1-10, from 
Stephen D. Page, dated March 20, 2015, available at https://www.epa.gov/sites/production/files/2016-04/documents/20150320so2designations.pdf, and ``Area Designations for the 2010 
Primary Sulfur Dioxide National Ambient Air Quality Standard--Round 
3,'' memorandum to Regional Air Division Directors, Regions 1-10, 
dated July 22, 2016, available at https://www.epa.gov/sites/production/files/2016-07/documents/areadesign.pdf.
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    An updated designations guidance document was issued by the EPA on 
September 5, 2019, to better reflect the Round 4 2010 SO2 
NAAQS designations process and to supplement, where necessary, prior 
designations guidance documents.\12\ This memorandum identifies factors 
that the EPA intended to evaluate in determining whether areas are in 
violation of the 2010 SO2 NAAQS. The document also contains 
the factors that the EPA intended to evaluate in determining the 
boundaries for all remaining undesignated areas in the country. These 
factors include: (1) Air quality characterization via ambient 
monitoring and/or dispersion modeling results; (2) emissions-related 
data; (3) meteorology; (4) geography and topography; and (5) 
jurisdictional boundaries.\13\
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    \12\ See ``Area Designations for the 2010 Primary Sulfur Dioxide 
National Ambient Air Quality Standard--Round 4,'' memorandum to 
Regional Air Division Directors, Regions 1-10, from Peter 
Tsirigotis, dated September 5, 2019, available at https://www.epa.gov/sites/production/files/2019-09/documents/round_4_so2_designations_memo_09-05-2019_final.pdf .
    \13\ The EPA supplemented this guidance with documents first 
made available to states and other interested parties in 2013 and 
updated in 2016. See SO2 NAAQS Designations Source-
Oriented Monitoring Technical Assistance Document (February 2016), 
available at https://www.epa.gov/sites/production/files/2016-06/documents/so2monitoringtad.pdf, and SO2 NAAQS 
Designations Modeling Technical Assistance Document (August 2016), 
available at https://www.epa.gov/sites/production/files/2016-06/documents/so2modelingtad.pdf.
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VI. What air quality information has the EPA used for these 
designations?

    These designations are based on the EPA's application of the 
nationwide analytical approach to, and technical assessment of, the 
weight of evidence for each area, including but not limited to 
available air quality monitoring data and related air quality modeling 
results. With respect to air quality monitoring data, the EPA has 
considered data from at least the most recent three full calendar 
years, i.e., 2017-2019. The 1-hour primary SO2 standard is 
violated at an ambient air quality monitoring site when the 3-year 
average of the annual 99th percentile of the daily maximum 1-hour 
average concentrations of SO2 exceeds 75 ppb, as determined 
in accordance with Appendix T of 40 CFR part 50.
    In the EPA's September 2019 memorandum, we noted that Round 4 area 
designations are based primarily on ambient monitoring data, including 
data from existing and new EPA-approved monitors that have collected 
data at least from January 2017 forward, pursuant to the DRR. In 
addition, the EPA may evaluate related air dispersion modeling 
submitted by state air agencies for two specific circumstances. First, 
states may submit air dispersion modeling of actual or allowable 
emissions to support the geographic extent of a nonattainment boundary. 
Second, states may submit air dispersion modeling of allowable 
emissions to demonstrate that new permanent and federally-enforceable 
SO2 emissions limits that subject sources are meeting 
provide for attainment of the NAAQS and represent a more accurate 
characterization of current air quality at the time of designation than 
does monitoring data reflecting past air quality that does not account 
for compliance with new limits and associated enforceable emissions 
reductions.
    The deadline for Round 4 designations and the practical 
difficulties of obtaining complete, quality-assured, certified 
SO2 monitoring data for the entirety of calendar year 2020 
in December 2020, make the EPA's use of final 2020 monitoring data for 
this action generally impracticable. Under normal circumstances, under 
the applicable regulations, the deadline for states to certify 
monitoring data for calendar year 2020 is May 1, 2021. However, because 
these designations are being promulgated at the end of calendar year 
2020, and because states can make complete, quality-assured, certified 
2020 data available for some areas quickly in 2021, to address the 
impracticability problem, the EPA is providing a process by which 
state-certified 2020 monitoring data that become available early in 
2021 could be used in the Round 4 designations process.
    Provided that this document is published in the Federal Register no 
later than March 31, 2021, the final Round 4 SO2 
designations announced in this action will be effective on April 30, 
2021. If any state submits complete, quality-assured, certified 2020 
data (i.e., monitoring data from EPA's Air Quality System) to the 
appropriate EPA Regional office by February 15, 2021, supporting a 
change of the designation status for any Round 4 area within that 
state, and the EPA agrees that a change of designation status is 
appropriate, we will withdraw the designation announced in this action 
for such area and issue another designation that reflects the inclusion 
and analysis of such information. Any designation modification will 
occur in a separate Federal Register action prior to the April 30, 
2021, effective date. We emphasize that EPA will conduct this process 
only for those states that submit the necessary information by the 
deadline of February 15, 2021, and in those instances where we can 
complete our analysis of the information and effect the change of 
designation status before the original effective date established by 
this final action.

VII. How do the Round 4 designations affect areas of Indian country?

    There are no violating monitors for areas of Indian country, so no 
areas of Indian country are being designated as nonattainment or 
unclassifiable in Round 4. Any other parts of Indian country being 
designated as attainment/unclassifiable are being designated along with 
the surrounding state area.

VIII. Where can I find information forming the basis for this rule and 
exchanges between the EPA, states, and tribes related to this rule?

    Information and data providing the basis for this action are 
provided in a final designations technical support document (TSD) \14\ 
included in the docket. The final designations TSD, intended 
designations TSD, modeling files, technical assistance documents, 
applicable EPA memoranda, public comments, and copies of correspondence 
regarding this process between the EPA and the states, territories, 
tribes, and other parties, are available for review at the public 
docket for these SO2 designations at https://www.regulations.gov under Docket ID No. EPA-HQ-OAR-2020-0037.
---------------------------------------------------------------------------

    \14\ The single final TSD for this action consists of a few 
sections with information that applies to all affected areas or to 
certain groups of areas with some common features, and many sections 
that are specific to individual state areas. For convenience, the 
term ``TSD'' is also used generically to refer to these state-
specific sections. For informational purposes, these individual 
state-specific sections/TSDs are available for separate downloading 
from the indicated EPA website.
---------------------------------------------------------------------------

    The EPA has also established a website for the initial 
SO2 designations

[[Page 16060]]

rulemakings at: https://www.epa.gov/sulfur-dioxide-designations. The 
website includes the EPA's final SO2 designations, as well 
as state recommendation letters, the EPA's 120-day intended 
designations notification letters, technical support documents, 
responses to comments, and other related technical information. 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 
Office or the Regional office contacts listed in the FOR FURTHER 
INFORMATION CONTACT section of this action.

IX. Environmental Justice Concerns

    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 addresses designation 
determinations for certain areas for the 2010 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.

X. 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 responds to the CAA requirement to promulgate air 
quality designations after promulgation of a new or revised NAAQS.

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

    This action is not an Executive Order 13771 regulatory action 
because 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. This action fulfills the non-discretionary duty for the EPA to 
promulgate air quality designations after promulgation of a new or 
revised NAAQS and does not contain any information collection 
activities.

D. Regulatory Flexibility Act (RFA)

    This designation action under CAA section 107(d) is not subject to 
the RFA. The RFA applies only to rules subject to notice-and-comment 
rulemaking requirements under the Administrative Procedures Act (APA), 
5 U.S.C. 553, or any other statute. Section 107(d)(2)(B) of the CAA 
explicitly provides that designations are exempt from the notice-and-
comment provisions of the APA. In addition, designations under CAA 
section 107(d) are not among the list of actions that are subject to 
the notice-and-comment rulemaking requirements of CAA section 307(d).

E. Unfunded Mandates Reform Act (UMRA)

    This action does not contain any unfunded mandate as described in 
UMRA, 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 certain 
areas in the U.S. for the 2010 SO2 NAAQS. The CAA provides 
for states, territories, and eligible tribes to develop plans to 
regulate emissions of air pollutants within their areas, as necessary, 
based on the designations. The Tribal Authority Rule (TAR) provides 
tribes the opportunity to apply for eligibility to develop and 
implement CAA programs, such as programs to attain and maintain the 
SO2 NAAQS, but it leaves to the discretion of the tribe the 
decision of whether to apply to develop these programs and which 
programs, or appropriate elements of a program, the tribe will seek to 
adopt. This rule does not have a substantial direct effect on one or 
more Indian tribes. It would not create any additional requirements 
beyond those of the SO2 NAAQS. This rule establishes the 
designations for certain areas of the country for the 2010 
SO2 NAAQS, but no areas of Indian country are being 
designated as nonattainment by this action. 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 TAR 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.
    Although Executive Order 13175 does not apply to this rule, after 
the EPA promulgated the 2010 primary SO2 NAAQS, the EPA 
communicated with tribal leaders and environmental staff regarding the 
designations process. In 2011, the EPA also sent individualized letters 
to all federally recognized tribes to explain the designation process 
for the 2010 SO2 NAAQS, to provide the EPA designations 
guidance, and to offer consultation with the EPA. The EPA provided 
further information to tribes through presentations at the National 
Tribal Forum and through participation in National Tribal Air 
Association conference calls. The EPA also sent individualized letters 
to all federally recognized tribes that submitted recommendations to 
the EPA about the EPA's intended Round 1 designations for the 
SO2 standard and offered tribal leaders the opportunity for 
consultation.\15\ These communications provided opportunities for 
tribes to voice concerns to the EPA about the general designations 
process for the 2010 SO2 NAAQS, as well as concerns specific 
to a tribe, and informed the EPA about key tribal concerns regarding 
designations as the designations process was under development and 
through its implementation up to that point. For the second, third, and 
fourth rounds of SO2 designations, the EPA sent additional 
letters to tribes that could potentially be affected and offered 
additional opportunities for participation in the designations process.
---------------------------------------------------------------------------

    \15\ These communication letters to the tribes are provided in 
the dockets for Round 1 (Docket ID NO. EPA-HQ-OAR-2012-0233), Round 
2 (Docket ID NO. EPA-HQ-OAR-2014-0464), and Round 3 (Docket ID NO. 
EPA-HQ-OAR-2017-0003).
---------------------------------------------------------------------------

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

[[Page 16061]]

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

    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). The documentation for this 
determination is contained in Section IX of this action, 
``Environmental Justice Concerns.''

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

    Section 307(b)(1) of the CAA indicates which Federal Courts of 
Appeal have venue for petitions of review of final actions by the EPA. 
This section provides, in part, that petitions for review must be filed 
in the Court of Appeals for the District of Columbia Circuit: (i) When 
the agency action consists of ``nationally applicable regulations 
promulgated, or final actions taken, by the Administrator,'' or (ii) 
when such action is locally or regionally applicable, if ``such action 
is based on a determination of nationwide scope or effect and if in 
taking such action the Administrator finds and publishes that such 
action is based on such a determination.''
    This final action is nationally applicable. To the extent a court 
finds this final action to be locally or regionally applicable, the EPA 
finds that this action is based on a determination of ``nationwide 
scope or effect'' within the meaning of CAA section 307(b)(1). This 
final action establishes designations for the 2010 SO2 NAAQS 
for certain areas across the U.S., located in 21 states, nine EPA 
Regions, and 10 federal judicial circuits. This final action is also 
based on a common core of determinations applied to areas across the 
country, including the EPA's nationwide analytical approach to and 
technical analysis of evaluating monitoring data and air quality 
modeling within the EPA's interpretation of statutory terms in the CAA 
such as the definitions of nonattainment, attainment, and 
unclassifiable under section 107(d)(1) of the CAA. For these reasons, 
this final action is nationally applicable or, alternatively, to the 
extent a court finds this action to be locally or regionally 
applicable, the Administrator has determined that this final action is 
based on a determination of nationwide scope or effect for purposes of 
CAA section 307(b)(1) and is hereby publishing that finding in the 
Federal Register.
    Under section 307(b)(1) of the CAA, petitions for judicial review 
of this action must be filed in the United States Court of Appeals for 
the District of Columbia Circuit within 60 days from the date this 
final action is published in the Federal Register. Filing a petition 
for reconsideration by the Administrator of this final action does not 
affect the finality of the action for the purposes of judicial review, 
nor does it extend the time within which a petition for judicial review 
must be filed, and shall not postpone the effectiveness of such rule or 
action.

List of Subjects in 40 CFR Part 81

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

Signing Statement

    This document of the Environmental Protection Agency was signed on 
December 21, 2020, by Andrew Wheeler, Administrator, pursuant to court 
order of December 31, 2020. That document with the original signature 
and date is maintained by EPA. For administrative purposes only, and in 
compliance with requirements of the Office of the Federal Register, the 
undersigned EPA Official re-signs the document for publication, as an 
official document of the Environmental Protection Agency. This 
administrative process in no way alters the legal effect of this 
document upon publication in the Federal Register.

    Signed in Washington, DC, on December 21, 2020, by Andrew 
Wheeler, Administrator.
Jane Nishida,
Acting Administrator.

    Note: This document was received for publication by the Office 
of the Federal Register on March 11, 2021.

    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

0
2. In Sec.  81.301, the table entitled ``Alabama--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the entry 
``Shelby County (part)'', adding an entry for ``Shelby County 
(remainder)'' in alphabetical order under ``Rest of State'', and 
removing footnote 3 from the end of the table.
    The addition reads as follows:

Sec.  81.301  Alabama.

* * * * *

                                       Alabama--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Rest of State:
 

[[Page 16062]]

 
                                                  * * * * * * *
    Shelby County (remainder)..................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
3. In Sec.  81.311, the table entitled ``Georgia--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading and the entry ``Rest of State'', 
adding an entry for ``Floyd County'' in alphabetical order under ``Rest 
of State:'', and removing footnote 3 from the end of the table.
    The addition reads as follows:

Sec.  81.311  Georgia.

* * * * *

                                       Georgia--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Rest of State:
 
                                                  * * * * * * *
    Floyd County...............................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
4. In Sec.  81.312, the table entitled ``Hawaii--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``Honolulu 
County'' in alphabetical order, and removing footnote 3 from the end of 
the table.
    The addition reads as follows:

Sec.  81.312  Hawaii.

* * * * *

                                        Hawaii--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Honolulu County................................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
5. Section 81.314 is amended by revising the table entitled 
``Illinois--2010 Sulfur Dioxide NAAQS [Primary]'' to read as follows:

Sec.  81.314  Illinois.

* * * * *

[[Page 16063]]

                                       Illinois--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
Alton Township, IL.............................    9/12/2016  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.....................................    5/26/2020  Attainment.
    Cook County (part).........................
        Lemont Township........................
    Will County (part).........................
        DuPage Township and Lockport Township..
Pekin, IL......................................    5/26/2020  Attainment.
    Tazewell County (part).....................
        Cincinnati Township and Pekin Township.
Peoria County (part)...........................
        Hollis Township........................
Rest of State:
    Adams County...............................  ...........  Attainment/Unclassifiable.
    Alexander County...........................  ...........  Attainment/Unclassifiable.
    Bond County................................  ...........  Attainment/Unclassifiable.
    Boone County...............................  ...........  Attainment/Unclassifiable.
    Brown County...............................  ...........  Attainment/Unclassifiable.
    Bureau County..............................    9/12/2016  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..............................    9/12/2016  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.

[[Page 16064]]

 
    McDonough County...........................  ...........  Attainment/Unclassifiable.
    McHenry County.............................  ...........  Attainment/Unclassifiable.
    McLean County..............................  ...........  Attainment/Unclassifiable.
    Macon County...............................    4/30/2021  Attainment/Unclassifiable.
    Macoupin County............................  ...........  Attainment/Unclassifiable.
    Madison County (part) (remainder) \4\......  ...........  Attainment/Unclassifiable.
    Marion County..............................  ...........  Attainment/Unclassifiable.
    Marshall County............................  ...........  Attainment/Unclassifiable.
    Mason County...............................  ...........  Attainment/Unclassifiable.
    Massac County..............................    9/12/2016  Attainment/Unclassifiable.
    Menard County..............................  ...........  Attainment/Unclassifiable.
    Mercer County..............................  ...........  Attainment/Unclassifiable.
    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..............................    9/12/2016  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..........................   \3\ 10/15/  Attainment/Unclassifiable.
                                                        2019
    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\ This date is April 9, 2018, unless otherwise noted.
\3\ Williamson County was initially designated on September 12, 2016. The initial designation was reconsidered
  and modified on October 15, 2019.
\4\ 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 9/12/16.

* * * * *

0
6. In Sec.  81.315, the table entitled ``Indiana--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``Porter 
County'' (before the entry for ``Posey County''), and removing footnote 
3 from the end of the table.
    The addition reads as follows:

Sec.  81.315  Indiana.

* * * * *

[[Page 16065]]

                                       Indiana--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Porter County..................................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
7. In Sec.  81.318, table entitled ``Kentucky--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 4 from the 
``Designated area'' heading and from the entry for ``Henderson County 
(part)'', adding entries for ``Henderson-Webster Counties, KY'' (before 
the entry ``Campbell-Clermont Counties, KY-OH:'') adding entries for 
``Henderson County (remainder)'' (before the entry ``Henry County''), 
and ``Webster County (remainder)'' in alphabetical order, and removing 
footnote 4 from the end of the table.
    The additions read as follows:

Sec.  81.318  Kentucky.

* * * * *

                                       Kentucky--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
                Designated area                 ----------------------------------------------------------------
                                                   Date \1\                          Type
----------------------------------------------------------------------------------------------------------------
Henderson-Webster Counties, KY.................    4/30/2021  Nonattainment.
    Henderson County (part).
    Webster County (part).
        That portion of Henderson and Webster
         Counties encompassed by the polygon
         with the 48 vertices using Universal
         Traverse Mercator (UTM) coordinates of
         North American Datum 1983 (NAD83) as
         follows:
            (1) KY 520, Upper Delaware Rd to
             the Green River boundary at
             463979.00 Easting (E), 4171000.03
             Northing (N);
            (2) The Green River boundary to JZ
             Shelton Rd 459058.03 E, 4160832.96
             N;
            (3) JZ Shelton Rd to KY 370
             457811.00 E, 4159192.96, N;
            (4) KY 370 to Pennyrile Parkway I-
             69 457089.96 E, 4159452.95 N;
            (5) Pennyrile Parkway I-69 to
             Sassafras Grove Rd 457675.35 E,
             4156244.55 N;
            (6) Sassafras Grove Rd to US 41
             456236.68 E, 4156125.75 N;
            (7) US 41 to Slaughters Elmwood Rd
             457442.82 E, 4153425.68 N;
            (8) Slaughters Elmwood Rd to
             Railroad Track (NW) 456589.41 E,
             4153424.43 N;
            (9) Railroad Track (NW) to Breton
             Rd 453677.09 E, 4155992.29 N;
            (10) Breton Rd to KY 1835 453079.74
             E, 4154924.00 N;
            (11) KY 1835 to KY 138 450702.89 E,
             4153141.51 N;
            (12) KY 138 to Crowder Rd 452587.06
             E, 4152032.38 N;
            (13) Crowder Rd to KY 120 453030.14
             E, 4149175.08 N;
            (14) KY 120 to Gooch Jones Rd
             447528.25 E, 4147663.88 N;
            (15) Gooch Jones Rd to John Roach
             Rd 446551.75 E, 4150042.51 N;
            (16) John Roach Rd to Old Dixon
             Slaughters Rd 447462.17 E,
             4151329.04 N;
            (17) Old Dixon Slaughters Rd to Old
             Dixon Rd 446532.28 E, 4152143.23
             N;
            (18) Old Dixon Rd to KY 138
             446849.49 E, 4152437.09 N;
            (19) KY 138 to Carnel Brooks Rd
             450196.38 E, 4153305.18 N;
            (20) Carnel Brooks Rd to Rakestraw
             Bottoms Rd 450079.34 E, 4154326.39
             N;
            (21) Rakestraw Bottoms Rd to KY 132
             447141.40 E, 4157145.04 N;
            (22) KY 132 to KY 283 444025.55 E,
             4156172.90 N;
            (23) KY 283 to Beckley Osbourne Rd
             444300.82 E, 4158111.35 N;
            (24) Beckley Osbourne Rd to Dixon
             Wanamaker Rd 442067.07 E,
             4158641.90 N;
            (25) Dixon Wanamaker Rd to KY 191
             441887.88 E, 4161614.33 N;
            (26) KY 191 to D Melton Rd
             442743.25 E, 4161250.11 N;
            (27) D Melton Rd to Knoblick Creek
             Rd 443688.82 E, 4162093.08 N;
            (28) Knoblick Creek Rd to US 41A
             442319.35 E, 4163220.45 N;
            (29) US 41A to Dixon 1 Rd 443500.62
             E, 4170518.52 N;
            (30) Dixon 1 Rd to GF Sights Rd
             443094.58 E, 4170166.59 N;
            (31) GF Sights Rd to Cairo Dixie Rd
             441341.46 E, 4170978.60 N;
            (32) Cairo Dixie Rd to Liles Cairo
             Rd 442919.00 E, 4173140.24 N;
            (33) Liles Cairo Rd to US 41A
             443124.23 E, 4173204.51 N;
            (34) US 41A to Cairo Hickory Grove
             Rd 442860.28 E, 4174017.18 N;
            (35) Cairo Hickory Grove Rd to
             Pruitt Agnew Rd 446056.06 E,
             4175740.98 N;

[[Page 16066]]

 
            (36) Pruitt Agnew Rd to KY 1299
             447662.11 E, 4180049.93 N;
            (37) KY 1299 to Anthoston Frog
             Island Rd 448905.37 E, 4176327.31
             N;
            (38) Anthoston Frog Island Rd to KY
             136 452613.63 E, 4179047.02 N;
            (39) KY 136 to Upper Delaware Rd
             454451.59 E, 4177687.26 N;
            (40) Upper Delaware Rd to Barren
             Church Rd S 456153.23 E,
             4177723.20 N;
            (41) Barren Church Rd S to Barren
             Church Rd N 457912.85 E,
             4180247.83 N;
            (42) Barren Church Rd N to KY 1078
             458542.52 E, 4181615.55 N;
            (43) KY 1078 to Jones Brothers Rd
             461322.00 E, 4179952.85 N;
            (44) Jones Brothers Rd to KY 416
             461209.84 E, 4177755.55 N;
            (45) KY 416 to KY 1078 463492.08 E,
             4178026.50 N;
            (46) KY 1078 to Onionville Rd
             464177.31 E, 4177054.13 N;
            (47) Onionville Rd to Work Road
             465476.34 E, 4176076.78 N;
            (48) Work Road to Upper Delaware Rd
             462529.15 E, 4173036.52 N.
 
                                                  * * * * * * *
    Henderson County (remainder)...............    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
    Webster County (remainder).................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------
\1\ This date is April 9, 2018, unless otherwise noted.
\2\ Excludes Indian country located in each area, if any, unless otherwise specified
\3\ Includes any Indian country in each county or area, if any, 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.

* * * * *

0
8. In Sec.  81.319, the table entitled ``Louisiana--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding entries for ``East Baton 
Rouge Parish'' (before the entry for ``East Carroll Parish), ``St. 
Charles Parish'' (before the entry for ``St. Helena Parish), ``St. 
James Parish'' (before the entry for ``St. John the Baptist Parish''), 
and ``West Baton Rouge Parish'' (before the entry for ``West Carroll 
Parish''), and removing footnote 3 from the end of the table.
    The additions read as follows:

Sec.  81.319  Louisiana.

* * * * *

                                      Louisiana--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
East Baton Rouge Parish........................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
St. Charles Parish.............................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
St. James Parish...............................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
West Baton Rouge Parish........................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
9. In Sec.  81.321, the table entitled ``Maryland--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``Allegany 
County'' before the entry ``Anne Arundel County (part) Remainder of 
County'', and

[[Page 16067]]

removing footnote 3 from the end of the table.
    The addition reads as follows:

Sec.  81.321  Maryland.

* * * * *

                                       Maryland--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Allegany County................................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
10. In Sec.  81.326, the table entitled ``Missouri--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``New Madrid 
County, MO'' (before the entry for ``Franklin-St. Charles Counties, 
MO''), adding an entry for ``Iron County'' (before the entry for 
``Jackson County (part)(remainder)''), adding an entry for ``New Madrid 
County (remainder)'' (before the entry for ``Newton County''), and 
removing footnote 3 from the end of the table.
    The addtions read as follows:

Sec.  81.326  Missouri.

* * * * *

                                       Missouri--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
New Madrid County, MO..........................    4/30/2021  Nonattainment.
    New Madrid County (part).
        Area bounded by: East: Missouri/
         Kentucky and Missouri/Tennessee State
         lines. North: County Highway 406 East
         to Levee Road, following Levee Road
         North to County Highway 406, then
         extending directly East to the
         Missouri/Kentucky State line. West:
         County Highway 403 South: County
         Highway 408 East to the intersection
         with County Highway 431, then
         extending directly East to the
         Missouri/Tennessee State line.
 
                                                  * * * * * * *
Iron County....................................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
New Madrid County (remainder)..................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
11. In Sec.  81.328, the table entitled ``Nebraska--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``Douglas 
County'' in alphabetical order under ``Statewide:'', and removing 
footnote 3 from the end of the table.
    The addition reads as follows:

Sec.  81.328  Nebraska.

* * * * *

[[Page 16068]]

                                       Nebraska--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Statewide:
 
                                                  * * * * * * *
    Douglas County.............................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
12. In Sec.  81.333, the table entitled ``New York--2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding entries for ``St. Lawrence 
County (part)'' (before the entry for ``Monroe County''), ``Cayuga 
County'' (before the entry for ``Chautauqua County''), ``Seneca 
County'' (before the entry for ``Steuben County''), ``St. Lawrence 
County (remainder)'' (before the entry for ``Steuben County''), and 
``Tompkins County'' (before the entry for ``Ulster County''), and 
removing footnote 3 from the end of the table.
    The additions read as follows:

Sec.  81.333  New York.

* * * * *

                                       New York--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
St. Lawrence County (part).....................    4/30/2021  Nonattainment.
    That portion of St. Lawrence County
     encompassed by the polygon with the
     vertices using Universal Traverse Mercator
     (UTM) coordinates in UTM zone 18 with
     datum NAD83 as follows:
        (1) Vertices-UTM Easting (m) 512656.8,
         UTM Northing 4977651.3; (2) vertices-
         UTM Easting (m) 510356.8, UTM Northing
         4976189.5; (3) Vertices-UTM Easting
         (m) 511064.5, UTM Northing 4974489.7;
         (4) Vertices-UTM Easting (m) 508898.2,
         UTM Northing 4973487.1; (5) Vertices-
         UTM Easting (m) 509251.4, UTM Northing
         4972866.3; (6) Vertices-UTM Easting
         (m) 509307.3, UTM Northing 4971758.9;
         (7) Vertices-UTM Easting (m) 507840.9,
         UTM Northing 4973890.8; (8) Vertices-
         UTM Easting (m) 504128.1, UTM Northing
         4974535.5; (9) Vertices-UTM Easting
         (m) 502311.8, UTM Northing 4977342.3;
         (10) Vertices-UTM Easting (m)
         503989.7, UTM Northing 4979232.2; (11)
         Vertices-UTM Easting (m) 504692.2, UTM
         Northing 4981230.3; (12) Vertices-UTM
         Easting (m) 509220.5, UTM Northing
         4983035.6.
 
                                                  * * * * * * *
Cayuga County..................................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Seneca County..................................    4/30/2021  Attainment/Unclassifiable.
St. Lawrence County (remainder)................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Tompkins County................................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
13. In Sec.  81.334, the table entitled ``North Carolina-2010 Sulfur 
Dioxide NAAQS [Primary]'' is amended by:
0
a. Removing the entry for ``Buncombe County (part) \4\ '' and adding an 
entry for ``Buncombe County'' in its place;
0
b. Adding an entry for ``Limestone Township'' under the new entry for 
``Buncombe County'';
0
c. Removing the entry for ``Haywood County (part) \4\ '' and adding an 
entry for ``Haywood County'' in its place;
0
d. Adding an entry for ``Beaverdam Township'' under the new entry for 
``Haywood County'';
0
e. Removing the entry for ``Person County (part) \4\ '' and adding an 
entry for ``Person County'' in its place;

[[Page 16069]]

0
f. Adding an entry for ``Cunningham Township'' under the new entry for 
``Person County''; and
0
g. Removing footnote 4 from the table.
    The additions read as follows:

Sec.  81.334  North Carolina.

* * * * *

                                    North Carolina--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
                Designated area                 ----------------------------------------------------------------
                                                   Date \1\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Buncombe County................................  ...........  Attainment/Unclassifiable.
    All Townships except Limestone Township.
    Limestone Township.........................    4/30/2021
 
                                                  * * * * * * *
Haywood County.................................  ...........  Attainment/Unclassifiable.
    All Townships except Beaverdam Township.
    Beaverdam Township.........................    4/30/2021
 
                                                  * * * * * * *
Person County..................................  ...........  Attainment/Unclassifiable.
    All Townships except Cunningham Township.
    Cunningham Township........................    4/30/2021
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------
\1\ This date is April 9, 2018, unless otherwise noted.
\2\ Excludes Indian country located in each area, if any, unless otherwise specified
\3\ 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.

* * * * *

0
14. In Sec.  81.335, the table entitled ``North Dakota-2010 Sulfur 
Dioxide NAAQS [Primary]'' is amended by removing footnote 3 from the 
entry for ``Rest of State:'', adding an entry for ``Williams County'' 
in alphabetical order under ``Rest of State:'', and removing footnote 3 
from the end of the table.
    The addition reads as follows:

Sec.  81.335   North Dakota.

* * * * *

                                     North Dakota--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Rest of State:                                   ...........  Attainment/Unclassifiable.
 
                                                  * * * * * * *
    Williams County............................    4/30/2021
----------------------------------------------------------------------------------------------------------------
\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 April 9, 2018, unless otherwise noted.

* * * * *

0
15. In Sec.  81.337, the table entitled ``Oklahoma-2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding entries for ``Garfield 
County'', ``Mayes County'', and ``Muskogee County'' in alphabetical 
order, and removing footnote 3 from the end of the table.
    The additions read as follows:

Sec.  81.337   Oklahoma.

* * * * *

[[Page 16070]]

                                       Oklahoma--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Garfield County................................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Mayes County...................................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Muskogee County................................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
16. In Sec.  81.339, the table entitled ``Pennsylvania--2010 Sulfur 
Dioxide NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``York County'' 
(after the entry for ``Wyoming County''), and removing footnote 3 from 
the end of the table.
    The addition reads as follows:

Sec.  81.339  Pennsylvania.

* * * * *

                                     Pennsylvania--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
York County....................................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
17. In Sec.  81.344, the table entitled ``Texas-2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by:
0
a. Removing footnote 3 from the ``Designated area'' column heading;
0
b. Adding entries for ``Howard County (part)'', ``Hutchinson County 
(part)'', and ``Navarro County (part)'' in alphabetical order before 
the entry for ``Rusk and Panola Counties, TX'';
0
c. Adding an entry for ``Harrison County'' before the entry for ``Milam 
County'';
0
d. Adding an entry for ``Orange County'' before the entry for ``Potter 
County'';
0
e. Adding an entry for ``Bexar County'' before the entry for ``Blanco 
County'';
0
f. Adding an entry for ``Howard County (remainder)'' before the entry 
for ``Hudspeth County'';
0
g. Adding an entry for ``Hutchinson (remainder)'' before the entry for 
``Irion County'';
0
h. Adding an entry for ``Jefferson County'' before the entry for ``Jim 
Hogg County'';
0
i. Adding an entry for ``Navarro County (remainder)'' before the entry 
for ``Newton County'';
0
j. Revising the entry for ``Robertson County'' to read ``Robertson 
County (partial) \3\ '';
0
k. Adding an entry for ``Robertson County (remainder) \3\'' before the 
entry for ``Rockwall County'';
0
l. Removing the entry for ``Titus County (part)'' and adding an entry 
for ``Titus County (remainder)'' in its place; and
0
m. Revising the text of footnote 3
    The additions and revision read as follows:

Sec.  81.344   Texas.

* * * * *

[[Page 16071]]

                                        Texas--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Howard County, TX (part).......................    4/30/2021  Nonattainment.
    Those portions of Howard County encompassed
     by the rectangle with the vertices using
     Universal Traverse Mercator (UTM)
     coordinates in UTM zone 14 with datum
     NAD83 as follows:
        (1) Vertices--UTM Easting (m) 271177.6,
         UTM Northing (m) 3571453.5;
        (2) vertices--UTM Easting (m) 274913.8,
         UTM Northing (m) 3571453.5;
        (3) vertices--UTM Easting (m) 274913.8,
         UTM Northing (m) 3576035.9;
        (4) vertices--UTM Easting (m) 271177.6,
         UTM Northing (m) 3576035.9.
 
                                                  * * * * * * *
Hutchinson County, TX (part)...................    4/30/2021  Nonattainment.
    Those portions of Hutchinson County
     encompassed by the rectangle with the
     vertices using Universal Traverse Mercator
     (UTM) coordinates in UTM zone 14 with
     datum NAD83 as follows:
        (1) Vertices--UTM Easting (m) 273540.5,
         UTM Northing (m) 3945147.6;
        (2) vertices--UTM Easting (m) 296187.4,
         UTM Northing (m) 3944698.5;
        (3) vertices--UTM Easting (m) 296187.4,
         UTM Northing (m) 3959485.8;
        (4) vertices--UTM Easting (m) 273540.5,
         UTM Northing (m) 3959499.4.
 
                                                  * * * * * * *
Navarro County (part)..........................    4/30/2021  Nonattainment.
    Those portions of Navarro County
     encompassed by the polygon with the
     vertices using Universal Traverse Mercator
     (UTM) coordinates in UTM zone 14 with
     datum NAD83 as follows:
        (1) Vertices--UTM Easting (m) 734940.8,
         UTM Northing (m) 3520745.2;
        (2) vertices--UTM Easting (m) 737000.0,
         UTM Northing (m) 3520585.9;
        (3) vertices--UTM Easting (m) 756678.9,
         UTM Northing (m) 3532601.9;
        (4) vertices--UTM Easting (m) 756678.9,
         UTM Northing (m) 3542866.0;
        (5) vertices--UTM Easting (m) 734940.8,
         UTM Northing (m) 3542866.0.
 
                                                  * * * * * * *
Harrison County................................    4/30/2021  Unclassifiable.
 
                                                  * * * * * * *
Orange County..................................    4/30/2021  Unclassifiable.
 
                                                  * * * * * * *
Bexar County...................................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Howard County (remainder)......................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Hutchinson County (remainder)..................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Jefferson County...............................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Navarro County (remainder).....................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Robertson County (part) \3\....................    9/12/2016  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Robertson County (remainder) \3\...............    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Titus County (remainder).......................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.
\3\ A portion of Robertson County, specifically the area around the Optim Energy Twin Oaks Power Station, was
  designated Attainment/Unclassifiable on 9/12/16. The remaining portion of Robertson County was designated on 4/
  30/2021.

[[Page 16072]]

* * * * *

0
18. In Sec.  81.347, the table entitled ``Virginia-2010 Sulfur Dioxide 
NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``Giles County 
(part)'' (before the entry for ``Buchanan County''), adding entries for 
``Alleghany County'', ``Botetourt County'', and ``Giles County 
(remainder)'' in alphabetical order after the entry for ``Accomack 
County'', and removing footnote 3 from the end of the table.
    The additions read as follows:

Sec.  81.347  Virginia.

* * * * *

                                       Virginia--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
Giles County (part)............................    4/30/2021  Nonattainment.
    Using Geographic Coordinate System:
        GCS_North_American_1983 and Datum
         D_North_American_1983, the area
         bounded by the lines connecting the
         following coordinate points (Latitude,
         Longitude):
            37.385249, -80.718248
            37.431656, -80.619986
            37.391368, -80.597698
            37.369986, -80.649488
            37.354441, -80.642085
            37.338479, -80.676322
            37.339474, -80.676771
            37.340652, -80.677123
            37.341580, -80.677298
            37.343330, -80.678318
            37.344937, -80.679026
            37.345866, -80.679692
            37.347105, -80.680670
            37.347976, -80.681783
            37.348229, -80.682898
            37.348480, -80.683657
            37.348185, -80.684689
            37.347824, -80.685948
            37.347241, -80.687983
            37.346509, -80.689766
            37.346075, -80.691489
            37.345317, -80.693571
            37.345091, -80.694767
            37.344900, -80.696603
            37.344679, -80.697755
            37.344700, -80.698520
            37.344989, -80.699570
            37.345395, -80.700635
            37.345740, -80.701485
            37.347021, -80.701929
            37.348308, -80.701922
            37.349556, -80.701498
            37.350789, -80.701099
            37.352718, -80.700642
            37.354894, -80.700352
            37.356601, -80.700486
            37.358442, -80.700844
            37.359567, -80.701852
            37.361185, -80.702914
            37.361950, -80.703726
            37.362516, -80.705580
            37.362901, -80.707040
            37.363285, -80.708539
 
                                                  * * * * * * *
Alleghany County...............................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Botetourt County...............................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Giles County (remainder).......................    4/30/2021  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.

[[Page 16073]]

 
\2\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
19. In Sec.  81.348, the table entitled ``Washington-2010 Sulfur 
Dioxide NAAQS [Primary]'' is amended by removing footnote 3 from the 
entry for ``Rest of State:'', adding an entry for ``Whatcom County 
(part)'' (before the entry ``Lewis County''), adding entries for 
``Chelan'', ``Douglas'', and ``Whatcom (remainder)'' in alphabetical 
order under ``Rest of State:'', and removing footnote 3 from the end of 
the table.
    The additions read as follows:

Sec.  81.348  Washington.

* * * * *

                                      Washington--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
Whatcom County (part)..........................    4/30/2021  Nonattainment.
    That portion of Whatcom County encompassed
     by the rectangle with the vertices using
     Universal Traverse Mercator (UTM)
     coordinates in UTM zone 10 with datum
     NAD83 as follows: (1) Vertices--UTM
     Easting (m) 519671, UTM Northing (m)
     5412272; (2) Vertices--UTM Easting (m)
     524091, UTM Northing (m) 5412261; (3)
     Vertices--UTM Easting (m) 519671, UTM
     Northing (m) 5409010; (1) Vertices--UTM
     Easting (m) 524111, UTM Northing (m)
     5409044.
 
                                                  * * * * * * *
Rest of State:
 
                                                  * * * * * * *
    Chelan.....................................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
    Douglas....................................    4/30/2021  Attainment/Unclassifiable.
 
                                                  * * * * * * *
Whatcom (remainder)............................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
20. In Sec.  81.349, the table entitled ``West Virginia--2010 Sulfur 
Dioxide NAAQS [Primary]'' is amended by removing footnote 3 from the 
``Designated area'' column heading, adding an entry for ``Mineral 
County'' (before the entry for ``Mingo County''), and removing footnote 
3 from the end of the table.
    The addition reads as follows:

Sec.  81.349  West Virginia.

* * * * *

                                    West Virginia--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
Mineral County.................................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
21. In Sec.  81.350, the table entitled ``Wisconsin--2010 Sulfur 
Dioxide NAAQS [Primary]'' is amended by:
0
a. Removing footnote 4 from the ``Designated area'' column heading;
0
b. Adding an entry for ``Outagamie County (part)'' before the entry 
``Rhinelander, WI'';
0
c. Removing the entry for ``Oneida County'' below the entry ``Oconto 
County'' and adding an entry for ``Oneida County (remainder)'' in its 
place;

[[Page 16074]]

0
d. Adding an entry for ``Outagamie County (remainder)'' before the 
entry ``Ozaukee County; and
0
e. Removing footnote 4 from the end of the table.
    The additions read as follows:

Sec.  81.350   Wisconsin.

* * * * *

                                      Wisconsin--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
    Outagamie County (part)                        4/30/2021  Nonattainment.
    Outagamie County except Oneida Township
     (which includes Oneida Reservation),
     Oneida Off-Reservation Trust Land, and
     Noncontiguous Portions of Seymour Township
     Adjoining Oneida Nation Tribal Lands.
 
                                                  * * * * * * *
Oneida County (remainder)......................  ...........  Attainment/Unclassifiable.
Outagamie County (remainder)...................    4/30/2021  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\ This date is April 9, 2018, unless otherwise noted.
\3\ Includes Indian country of the tribe listed in this table located in Forest County, Wisconsin. Information
  pertaining to areas of Indian country in this table is intended for Clean Air Act planning purposes only and
  is not an EPA determination of Indian country status or any Indian country boundary. EPA lacks the authority
  to establish Indian country land status, and is making no determination of Indian country boundaries, in this
  table.

* * * * *

0
22. Section 81.351 is amended by revising the table entitled 
``Wyoming--2010 Sulfur Dioxide NAAQS [Primary]'' to read as follows:

Sec.  81.351  Wyoming.

* * * * *

                                       Wyoming--2010 Sulfur Dioxide NAAQS
                                                    [Primary]
----------------------------------------------------------------------------------------------------------------
                                                                           Designation
              Designated area \1\               ----------------------------------------------------------------
                                                   Date \2\                          Type
----------------------------------------------------------------------------------------------------------------
Albany County..................................  ...........  Attainment/Unclassifiable.
Big Horn County................................  ...........  Attainment/Unclassifiable.
Campbell County................................  ...........  Attainment/Unclassifiable.
Carbon County..................................    4/30/2021  Attainment/Unclassifiable.
Converse County................................    4/30/2021  Attainment/Unclassifiable.
Crook County...................................  ...........  Attainment/Unclassifiable.
Fremont County (part)..........................  ...........  Attainment/Unclassifiable.
    All areas west of the western border of
     Township 40North-Range 93West, T39N-R93W,
     and T38N-R93W, and south of U.S. Route 20.
Freemont County (remainder)....................    4/30/2021  Attainment/Unclassifiable.
Goshen County..................................  ...........  Attainment/Unclassifiable.
Hot Springs County.............................  ...........  Attainment/Unclassifiable.
Johnson County.................................  ...........  Attainment/Unclassifiable.
Lincoln County.................................  ...........  Attainment/Unclassifiable.
Natrona County.................................  ...........  Attainment/Unclassifiable.
Niobrara County................................  ...........  Attainment/Unclassifiable.
Park County....................................  ...........  Attainment/Unclassifiable.
Platte County..................................  ...........  Attainment/Unclassifiable.
Sheridan County................................  ...........  Attainment/Unclassifiable.
Sublette County................................  ...........  Attainment/Unclassifiable.
Sweetwater County (part).......................  ...........  Attainment/Unclassifiable.
    All areas of the county east of U.S. Route
     191.
Sweetwater County (remainder)..................    4/30/2021  Attainment/Unclassifiable.
Teton County...................................  ...........  Attainment/Unclassifiable.
Uinta County...................................  ...........  Attainment/Unclassifiable.
Washakie County................................  ...........  Attainment/Unclassifiable.
Weston 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\ This date is April 9, 2018, unless otherwise noted.

[[Page 16075]]

* * * * *
[FR Doc. 2021-05397 Filed 3-25-21; 8:45 am]
BILLING CODE 6560-50-P