[Federal Register Volume 83, Number 6 (Tuesday, January 9, 2018)]
[Rules and Regulations]
[Pages 1098-1172]
[FR Doc No: 2017-28423]

Vol. 83

Tuesday,

No. 6

January 9, 2018

Part II

Environmental Protection Agency

-----------------------------------------------------------------------

40 CFR Part 81

Air Quality Designations for the 2010 Sulfur Dioxide (SO2) Primary
National Ambient Air Quality Standard--Round 3; Final Rule

Federal Register / Vol. 83 , No. 6 / Tuesday, January 9, 2018 / Rules
and Regulations

-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 81

[EPA-HQ-OAR-2017-0003; FRL-9972-73-OAR]

Air Quality Designations for the 2010 Sulfur Dioxide (SO2)
Primary National Ambient Air Quality Standard--Round 3

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: This final rule establishes the initial air quality
designations for certain areas in the United States (U.S.) for the 2010
sulfur dioxide (SO2) primary 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 based on the weight
of evidence for each area. The Clean Air Act (CAA or Act) directs areas
designated Nonattainment by this rule to undertake certain planning and
pollution control activities to attain the SO2 NAAQS as
expeditiously as practicable. This is the third of four expected sets
of actions to designate areas of the U.S. for the 2010 SO2
NAAQS.

DATES: The final rule is effective on April 9, 2018.

ADDRESSES: The EPA has established a docket for this action under
Docket ID No. EPA-HQ-OAR-2017-0003. All documents in the docket are
listed in the index at http://www.regulations.gov website. Although
listed in the index, some information is not publicly available, e.g.,
Confidential Business Information or other information whose disclosure
is restricted by statute. Certain other material, such as copyrighted
material, is not placed on the internet and will be publicly available
only in hard copy form. Publicly available docket materials are
available either electronically in the docket or in hard copy at the
Docket, WJC West Building, Room 3334, 1301 Constitution Avenue NW,
Washington, DC 20004. The hours of operation at the EPA Docket Center
are 8:30 a.m.-4:30 p.m., Monday-Friday. The telephone number for the
Public Reading Room is<PHONE_NUMBER>. 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 FURTHER INFORMATION section.
    In addition, the EPA has established a website for the initial
SO2 designations rulemakings at: https://www.epa.gov/sulfur-dioxide-designations. The website includes the EPA's final
SO2 designations, as well as state and tribal recommendation
letters, the EPA's modification letters, technical support documents,
responses to comments and other related technical information.

FOR FURTHER INFORMATION CONTACT: For general questions concerning this
action, please contact Liz Etchells, U.S. EPA, Office of Air Quality
Planning and Standards, Air Quality Policy Division, C539-01, Research
Triangle Park, NC 27709, telephone<PHONE_NUMBER>, email at
[email protected]. The EPA contacts listed at the beginning of
the Supplementary Information can answer questions regarding areas in a
particular EPA Regional office.

SUPPLEMENTARY INFORMATION:
    U.S. EPA Regional Office Contacts:
    Region I--Leiran Biton, telephone<PHONE_NUMBER>, email at
[email protected].
    Region II--Ken Fradkin, telephone<PHONE_NUMBER>, email at
[email protected].
    Region III--Ruth Knapp, telephone<PHONE_NUMBER>, email at
[email protected].
    Region IV--Twunjala Bradley, telephone<PHONE_NUMBER>, email at
[email protected].
    Region V--John Summerhays, telephone<PHONE_NUMBER>, email at
[email protected].
    Region VI--Bob Imhoff, telephone<PHONE_NUMBER>, email at
[email protected].
    Region VII--David Peter, telephone<PHONE_NUMBER>, email at
[email protected].
    Region VIII--Adam Clark, telephone<PHONE_NUMBER>, email at
[email protected].
    Region IX--Anita Lee, telephone<PHONE_NUMBER>, email at
[email protected].
    Region X--John Chi, telephone<PHONE_NUMBER>, email at
[email protected].
    The public may inspect the recommendations from the states,
territories and tribes, our recent letters notifying the affected
states, territories, and tribes of our intended designations, and area-
specific technical support information at the following locations:

------------------------------------------------------------------------
            Regional offices                          States
------------------------------------------------------------------------
Dave Conroy, Chief, Air Programs         Connecticut, Maine,
 Branch, EPA New England, 5 Post Office   Massachusetts, New Hampshire,
 Square, Suite 100, Boston, MA 02109-     Rhode Island and Vermont.
 3912,<PHONE_NUMBER>.
Richard Ruvo, Chief, Air Programs        New Jersey, New York, Puerto
 Branch, EPA Region II, 290 Broadway,     Rico and Virgin Islands.
 25th Floor, New York, NY 10007-1866,
<PHONE_NUMBER>.
Maria A. Pino, Acting Associate          Delaware, District of Columbia,
 Director, Office of Air Program          Maryland, Pennsylvania,
 Planning, EPA Region III, 1650 Arch      Virginia and West Virginia.
 Street, Philadelphia, PA 19103-2187,
<PHONE_NUMBER>.
R. Scott Davis, Chief, Air Planning and  Alabama, Florida, Georgia,
 Implementation Branch, EPA Region IV,    Kentucky, Mississippi, North
 Sam Nunn Atlanta Federal Center, 61      Carolina, South Carolina and
 Forsyth, Street, SW, 12th Floor,         Tennessee.
 Atlanta, GA 30303,<PHONE_NUMBER>.
John Mooney, Chief, Air Programs         Illinois, Indiana, Michigan,
 Branch, EPA Region V, 77 West Jackson    Minnesota, Ohio and Wisconsin.
 Street, Chicago, IL 60604, (312) 886-
 6043.
Alan Shar, Acting Chief, Air Planning    Arkansas, Louisiana, New
 Section, EPA Region VI, 1445 Ross        Mexico, Oklahoma and Texas.
 Avenue, Dallas, TX 75202, (214) 665-
 6691.
Mike Jay, Chief, Air Programs Branch,    Iowa, Kansas, Missouri and
 EPA Region VII, 11201 Renner Blvd.,      Nebraska.
 Lenexa, KS 66129,<PHONE_NUMBER>.
Monica Morales, Air Program Director,    Colorado, Montana, North
 EPA Region VIII, 1595 Wynkoop Street,    Dakota, South Dakota, Utah and
 Denver, CO 80202-1129,<PHONE_NUMBER>.   Wyoming.
Anita Lee, Air Planning Office, EPA      American Samoa, Arizona,
 Region IX, 75 Hawthorne Street, San      California, Guam, Hawaii,
 Francisco, CA 94105,<PHONE_NUMBER>.     Nevada, Northern Mariana
                                          Islands, Navajo Nation and the
                                          Hopi Tribe.

Debra Suzuki, Manager, State and Tribal  Alaska, Idaho, Oregon and
 Air Programs, EPA Region X, Office of    Washington.
 Air, Waste, and Toxics, Mail Code OAQ-
 107, 1200 Sixth Avenue, Seattle, WA
 98101,<PHONE_NUMBER>.
------------------------------------------------------------------------

    The information can also be reviewed online at https://www.epa.gov/sulfur-dioxide-designations and in the public docket for these
SO2 designations at https://www.regulations.gov under Docket
ID No. EPA-HQ-OAR-2017-0003.

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 and applicable guidance to determine area
designations and boundaries?
VI. What air quality information has the EPA used for these
designations?
VII. How do the Round 3 designations affect 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
DC District of Columbia
EO Executive Order
EPA Environmental Protection Agency
FR Federal Register
NAAQS National Ambient Air Quality Standards
NTTAA National Technology Transfer and Advancement Act
OMB Office of Management and Budget
SO2 Sulfur Dioxide
SOX Sulfur Oxides
RFA Regulatory Flexibility Act
UMRA Unfunded Mandate Reform Act of 1995
TAR Tribal Authority Rule
TAD Technical Assistance Document
TSD Technical Support Document
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/
Unclassifiable, or Unclassifiable, based on the definitions described
in Section IV in this preamble, and based on evaluating any available
information, including (but not limited to) appropriate modeling
analyses and/or monitoring data.
    This is the third round of designations for the 2010 SO2
NAAQS. As discussed in Section IV of this document, the EPA is
designating SO2 areas in multiple rounds. The EPA completed
the first round of SO2 designations in an action signed on
July 25, 2013 (78 FR 47191; August 5, 2013). In that action, the EPA
designated 29 areas in 16 states as Nonattainment, based on air quality
monitoring data. In the second round of SO2 designations, in
actions published on July 12, 2016 (81 FR 45039), and December 13, 2016
(81 FR 89870), the EPA designated 65 additional areas in 24 states: 7
Nonattainment areas, 41 Unclassifiable/Attainment areas and 17
Unclassifiable areas. In this third round, 6 areas are being designated
Nonattainment; 23 areas are being designated Unclassifiable; and the
rest of the areas covered by this round in all states, territories, and
tribal lands are being designated Attainment/Unclassifiable. In a
future fourth round, the EPA expects to designate all remaining
undesignated areas (approximately 50 areas) where states have installed
and begun timely operation of a new SO2 monitoring network.
    The list of areas being designated in the affected states and the
boundaries of each area appear in the tables for each state within the
regulatory text at the end of this document. For areas in this action
that meet our definition of ``Attainment/Unclassifiable,'' the EPA
notes this inversion, from previous rounds, of the order of the words
``Attainment'' and ``Unclassifiable'' in the amended term ``Attainment/
Unclassifiable area'' has no consequence itself, and that there are no
regulatory consequences of this change in, or clarified interpretation
of, terminology to the areas in which the terms ``Attainment/
Unclassifiable'' or ``Unclassifiable'' are applied. For consistency, we
are also inverting the order of ``Attainment'' and ``Unclassifiable''
for areas previously designated in Round 2 (81 FR 45039 and 81 FR
89870). This re-ordering of the terms has no regulatory consequence and
does not revisit the determinations made in Round 2 for these areas.
The EPA believes this change is consistent with Congress's definition
of ``Attainment area'' in CAA section 107(d)(1)(A)(ii), and will
improve public understanding and make clearer what regulations apply to
areas designated in this way, which states have commented they believe
is important for the economic development of such areas.
    These designations are based on the EPA's nationwide analytical
approach and technical assessment of and conclusions regarding the
weight of evidence for each area, including but not limited to
available air quality monitoring data or air quality modeling. With
respect to air quality monitoring data, the EPA considered data from at
least the most recent three calendar years 2014-2016 as available. In
the modeling runs conducted by states or third parties, the impacts of
the actual emissions for recent 3-year periods (e.g., 2012-2014, 2013-
2015, 2014-2016) were considered. In some cases, the modeling evaluated
current allowable

emissions limits in lieu of or as a supplement to modeling of actual
emissions. As described in Section VI and in limited circumstances, the
EPA may consider early certified 2015-2017 monitoring data or other
documentation that demonstrates Attainment. This information would need
to be submitted to the EPA by February 28, 2018. For the areas being
designated Nonattainment, the CAA directs states to develop and submit
to the EPA State Implementation Plans (SIPs) 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 this final rule.
    In 2010, the EPA issued a notice of final rulemaking 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 1-hour daily
maximum concentrations 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
or tribal leader has an opportunity to recommend air quality
designations, including the appropriate boundaries for Nonattainment
areas, to the EPA. 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.
    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'').\1\ 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, the U.S. District Court for the Northern District of California
on March 2, 2015, entered an enforceable order for the EPA to complete
the area designations by three specific deadlines according to the
court-ordered schedule.
---------------------------------------------------------------------------

    \1\ 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.
---------------------------------------------------------------------------

    To meet the first court-ordered deadline, additional areas were
designated on June 30, 2016, and November 29, 2016 (collectively
referred to as ``Round 2'').\2\ Pursuant to the court-ordered
schedule,\3\ the EPA must complete SO2 designations for the
remaining areas of the country by two specific deadlines: December 31,
2017, and December 31, 2020. This current third round of designations
addresses all remaining undesignated areas except those where a state
has installed and begun timely operating a new SO2
monitoring network meeting EPA specifications referenced in EPA's
SO2 Data Requirements Rule.\4\
---------------------------------------------------------------------------

    \2\ 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.
    \3\ Sierra Club v. McCarthy, No. 3-13-cv-3953 (SI) (N.D. Cal.
Mar. 2, 2015).
    \4\ 40 CFR part 51, subpart BB (80 FR 51052; August 21, 2015).
---------------------------------------------------------------------------

    On or about August 22, 2017, consistent with section
107(d)(1)(b)(ii) of the CAA, the EPA notified affected states,
territories, and tribes of its intended designation of certain specific
areas as either Nonattainment, Attainment/Unclassifiable, or
Unclassifiable for the SO2 NAAQS. These states then had the
opportunity to demonstrate why they believed an intended modification
of their updated recommendations by the EPA may be inappropriate.
Although not required under the CAA, as the EPA had done for the first
and second rounds of SO2 designations, the EPA also chose to
provide an opportunity for members of the public to comment on the
EPA's August 2017 letters. The EPA published a notice of availability
and public comment period for the intended designations on September 5,
2017 (82 FR 41903). The public comment period closed on October 5,
2017. The recommendations, the EPA's August 2017 letters, and the
subsequent state and public comment letters, are in the docket for this
third round of SO2 designations at Docket ID No. EPA-HQ-OAR-
2017-0003 and are available on the SO2 designations website.

III. What is the 2010 SO[bdi2] 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. 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 1-hour daily maximum 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
SO2 standards, subject to certain conditions. 40 CFR
50.4(e).
    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) of the CAA. As part of these Round
3 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 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 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 the EPA
has determined violates the 2010 SO2 NAAQS or contributes to
a violation in a nearby area, based on the most recent 3 years of air
quality monitoring data, appropriate dispersion modeling analysis, and
any other relevant information.
    In this action, an Attainment/Unclassifiable area is defined by the
EPA as an area that either: (1) Was not required to be characterized
under 40 CFR 51.1203(c) or (d) for which available information does not
indicate that the area violates the NAAQS or contributes to ambient air
quality in a nearby area that does not meet the NAAQS; or (2) was
required to be characterized under 40 CFR 51.1203(c) or (d) for which
the EPA has determined the available information indicates the area
meets the NAAQS and does not indicate the area contributes to ambient
air quality in a nearby area that does not meet the 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 3 of the 2010 SO2 NAAQS; (2) the appropriate basis for
characterizing the air quality of an area; (3) the five-factor analysis
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.\5\
---------------------------------------------------------------------------

    \5\ This view was confirmed in Catawba County v. EPA, 571 F.3d
20 (D.C. Cir. 2009).
---------------------------------------------------------------------------

    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 is
required to recommend air quality designations, including the
appropriate boundaries for areas, to the EPA.\6\ 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 followed the same process to the extent
practicable for tribes that submitted designation recommendations.
---------------------------------------------------------------------------

    \6\ Tribes are invited to submit recommendations following
promulgation of a new or revised NAAQS, but are not required to do
so.
---------------------------------------------------------------------------

V. What guidance did the EPA issue and how did the EPA apply the
statutory requirements and applicable guidance 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.\7\ That guidance
recommended, among other things, that monitoring data from the most
recent 3 consecutive years be used to identify a violation of the
SO2 NAAQS. This is appropriate because the form of the
SO2 NAAQS is calculated as a 3-year average of the 99th
percentile of the yearly distribution of 1-hour daily maximum
SO2 concentrations (specifically the most recent 3
consecutive years). The EPA based the first round of final
SO2 designations in 2013 solely on violating monitored
SO2 concentrations for the years 2010-2012 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.
---------------------------------------------------------------------------

    \7\ 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.
---------------------------------------------------------------------------

    In the March 24, 2011, guidance, the EPA stated that the perimeter
of a county containing a violation would be the initial presumptive
boundary for Nonattainment areas, but also stated that the state, tribe
and/or the EPA could conduct additional area-specific analyses that
could justify establishing either a larger or smaller area. The EPA
indicated that the following factors should be considered in an
analysis of whether to exclude portions of a county

and whether to include additional nearby areas outside the county as
part of the designated Nonattainment area: (1) Air quality data; (2)
emissions-related data; (3) meteorology; (4) geography/topography; and
(5) jurisdictional boundaries, as well as other available data. States
and tribes may identify and evaluate other relevant factors or
circumstances specific to a particular area.
    Following entry of the March 2, 2015, court order setting forth the
schedule for the EPA to complete SO2 designations, the EPA
issued updated designations guidance.\8\ This guidance superseded the
March 24, 2011, designation guidance for the 2010 SO2 NAAQS,
and identified factors that the EPA intended to evaluate in determining
whether areas are in violation of the 2010 SO2 NAAQS or
contribute to air quality in nearby areas that are in violation of the
2010 SO2 NAAQS. The guidance also contained the factors the
EPA intended to evaluate in determining the boundaries for all
remaining areas in the country, consistent with the court's order and
schedule. These factors include: (1) Air quality characterization via
ambient monitoring or dispersion modeling results; (2) emissions-
related data; (3) meteorology; (4) geography and topography; and (5)
jurisdictional boundaries.\9\
---------------------------------------------------------------------------

    \8\ See, ``Updated Guidance for Area Designations for the 2010
Primary Sulfur Dioxide National Ambient Air Quality Standard,''
memorandum to Regional Air Division Directors, Regions I-X, from
Stephen D. Page, dated March 20, 2015.
    \9\ 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.
---------------------------------------------------------------------------

    On March 8, 2017, the EPA issued a memo to clarify what version of
the AERMOD modeling system is the most appropriate for consideration by
the agency in the SO2 designations process.\10\
---------------------------------------------------------------------------

    \10\ See ``Clarification on the AERMOD Modeling System Version
for Use in SO2 Implementation Efforts and Other
Regulatory Actions,'' memorandum to EPA Regional Air Division
Directors from Richard A. Wayland, dated March 8, 2017. This memo is
available at https://www3.epa.gov/ttn/scram/guidance/clarification/SO2_DRR_Designation_Modeling_Clarification_Memo-03082017.pdf.
---------------------------------------------------------------------------

VI. What air quality information has the EPA used for these
designations?

    For designations for the SO2 NAAQS, air agencies have
the flexibility to characterize air quality using either appropriately
sited ambient air quality monitors or modeling of actual or current
allowable source emissions. 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 air quality
modeling results. The 1-hour primary SO2 standard is
violated at an ambient air quality monitoring site (or in the case of
dispersion modeling, at an ambient air quality receptor location) when
the 3-year average of the annual 99th percentile of the daily maximum
1-hour average concentrations exceeds 75 ppb, as determined in
accordance with Appendix T of 40 CFR part 50. With respect to air
quality monitoring data, the EPA has considered data from at least the
most recent 3 calendar years, i.e., 2014-2016, as available. In most of
the modeling runs available for EPA's review, the impacts of the actual
emissions for one or more of the recent 3-year periods (e.g., 2012-
2014, 2013-2015, 2014-2016) were considered, and in some cases the
modeling was of currently effective limits on allowable emissions in
lieu of or as a supplement to modeling of actual emissions.
    The deadline for Round 3 designations and the practical
difficulties of obtaining source emissions data for modeling, and
complete, quality-assured, certified SO2 monitoring data for
the entirety of calendar year 2017 in December 2017, make the EPA's use
of final 2017 emissions and monitoring data for this action generally
impracticable. Under normal circumstances, the full year of such data
would not be available to support regulatory determinations until after
the end of the calendar year, and under the applicable regulations, the
deadline for states to certify monitoring data is May 1, 2018. However,
because these designations are being promulgated at the end of calendar
year 2017, and because states can obtain source emissions information
and make complete, quality-assured, certified 2017 data available for
some areas quickly in 2018, in order to address the impracticability
problem, the EPA is providing a process by which state-certified 2017
monitoring or emissions data that become available early in 2018 could
be used in the designation process. We have provided that the final
SO2 designation decisions announced in this action will be
effective on the date 90 days following the date of publication of this
action in the Federal Register. If any state submits complete, quality-
assured, certified 2017 data or related information about 2017 air
quality to the EPA by February 28, 2018, supporting a change of the
designation status for any area within that state, and the EPA agrees
that a change of designation status is appropriate, then 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. We emphasize that we will conduct this process only
for those states that submit the information by the deadline of
February 28, 2018, 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.
    If these submissions cause an area to change from Nonattainment to
Attainment or Unclassifiable, the EPA will change the designation for
the area following the process described in the preceding paragraph. If
inclusion of 2017 data or related information about 2017 air quality
indicates Nonattainment in an area that was designated Attainment or
Unclassifiable, we will evaluate the reasons for the violation in the
area and determine the appropriate course of action, which could
include additional future action to change the designation for the area
to Nonattainment.

VII. How do the Round 3 designations affect Indian country?

    For areas of Indian country, there are no violating monitors. The
Navajo Nation submitted modeling analyses for the areas around two
SO2 emission sources located in the Navajo Nation, the
Navajo Generating Station and the Four Corners Power Plant, neither of
which indicated a violation of the NAAQS. The Navajo Nation, the lands
of the Hopi Tribe, and the Southern Ute Indian Reservation are being
designated as separate areas. All other parts of Indian country are
being designated as Attainment/Unclassifiable or Unclassifiable along
with the surrounding state area. No areas of Indian country are being
designated as Nonattainment in this round.

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 providing the basis for this final action are provided
in a final technical support document (TSD) \11\

included in the docket. The final TSD, intended designations TSD,
modeling files, technical assistance documents, applicable EPA guidance
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-2017-0003, at the EPA Docket Center listed above in
the ADDRESSES section of this document and on the agency's
SO2 Designations website at https://www.epa.gov/sulfur-dioxide-designations. Area-specific questions can be addressed to the
EPA Regional offices (see contact information provided at the beginning
of this document).
---------------------------------------------------------------------------

    \11\ 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 states, territories, or tribal
areas. For convenience, the term ``TSD'' is also used generically to
refer to these state/territory/tribe-specific sections. For
informational purposes, these individual state/territory/tribe-
specific sections/TSDs are available for separate downloading from
the indicated EPA website.
---------------------------------------------------------------------------

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 actions such as air quality designations after promulgating a
new revised NAAQS are exempt under Executive Order 12866.

C. Paperwork Reduction Act (PRA)

    This action does not impose an information collection burden under
the PRA. 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 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 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 primary 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.\12\ 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 round 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.
For this third round of SO2 designations, the EPA has sent
similar letters to affected tribes.
---------------------------------------------------------------------------

    \12\ These communication letters to the tribes are provided in
the dockets for Round 1 (Docket ID No. EPA-HQ-OAR-2012-0233 and
Round 2 (Docket ID No. EPA-HQ-OAR-2014-0464).
---------------------------------------------------------------------------

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

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

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

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

J. National Technology Transfer and Advancement Act (NTTAA)

    This rulemaking does not involve technical standards.

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

    The EPA believes that this action does not have disproportionately
high and adverse human health or environmental effects on minority
populations, low-income populations and/or indigenous peoples, as
specified in Executive Order 12898 (59 FR 7629, February 16, 1994). The
documentation for this determination is contained in Section IX of this
preamble, ``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 to designate certain areas for the 2010
SO2 NAAQS is ``nationally applicable'' within the meaning of
section 307(b)(1). The final action establishes designations for areas
across the U.S. for the 2010 SO2 NAAQS. At the core of this
action is the EPA's nationwide analytical approach and technical
analysis, including evaluation of monitoring data and air quality
modeling, applied to the available evidence for each area, including
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, and its application of that
interpretation to areas across the country. Accordingly, the
Administrator has determined that the final action is nationally
applicable and is hereby publishing that finding in the Federal
Register.
    For the same reasons discussed above that make the final rule
nationally applicable, the Administrator also has determined that the
final designations are of nationwide scope and effect for the purposes
of section 307(b)(1). This is particularly appropriate because, in the
report on the 1977 Amendments that revised section 307(b)(1) of the
CAA, Congress noted that the Administrator's determination that an
action is of ``nationwide scope or effect'' would be appropriate for
any action that has a scope or effect beyond a single judicial circuit.
H.R. Rep. No. 95-294 at 323, 324, reprinted in 1977 U.S.C.C.A.N. 1402-
03. Here, the scope and effect of the action will extend to numerous
judicial circuits since the designations will apply to areas across the
country. In these circumstances, section 307(b)(1) and its legislative
history calls for the Administrator to find the action to be of
``nationwide scope or effect'' and for venue to be in the D.C. Circuit.
Therefore, the Administrator has determined that the final action is
based on a determination by the Administrator of nationwide scope or
effect, and is hereby publishing that finding in the Federal Register.

List of Subjects in 40 CFR Part 81

    Air pollution control, National parks, Wilderness areas.

    Dated: December 21, 2017.
E. Scott Pruitt,
Administrator.

    For the reasons set forth in the preamble, 40 CFR part 81 is
amended as follows:

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

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

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

Subpart C--Section 107 Attainment Status Designations

0
2. Section 81.301 is amended by adding a table titled ``Alabama--2010
Sulfur Dioxide NAAQS (Primary)'' following the table titled ``Alabama--
1971 Sulfur Dioxide NAAQS (Primary and Secondary)'' to read as follows:

Sec.  81.301  Alabama.

* * * * *

                                  Alabama--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
Escambia County............................  ..............  Unclassifiable.
Mobile County..............................  ..............  Unclassifiable.
Morgan County..............................  ..............  Unclassifiable.
Pike County................................  ..............  Unclassifiable.
Shelby County..............................  ..............  Unclassifiable.
    Shelby County (part) \3\
        2016 US Census Block Groups
<PHONE_NUMBER>01 and<PHONE_NUMBER>02
Washington County..........................  ..............  Unclassifiable.

Rest of State:
    Autauga County.........................  ..............  Attainment/Unclassifiable.
    Baldwin County.........................  ..............  Attainment/Unclassifiable.
    Barbour County.........................  ..............  Attainment/Unclassifiable.
    Bibb County............................  ..............  Attainment/Unclassifiable.
    Blount County..........................  ..............  Attainment/Unclassifiable.
    Bullock County.........................  ..............  Attainment/Unclassifiable.
    Butler County..........................  ..............  Attainment/Unclassifiable.
    Calhoun County.........................  ..............  Attainment/Unclassifiable.
    Chambers County........................  ..............  Attainment/Unclassifiable.
    Cherokee County........................  ..............  Attainment/Unclassifiable.
    Chilton County.........................  ..............  Attainment/Unclassifiable.
    Choctaw County.........................  ..............  Attainment/Unclassifiable.
    Clarke County..........................  ..............  Attainment/Unclassifiable.
    Clay County............................  ..............  Attainment/Unclassifiable.
    Cleburne County........................  ..............  Attainment/Unclassifiable.
    Coffee County..........................  ..............  Attainment/Unclassifiable.
    Colbert County.........................  ..............  Attainment/Unclassifiable.
    Conecuh County.........................  ..............  Attainment/Unclassifiable.
    Coosa County...........................  ..............  Attainment/Unclassifiable.
    Covington County.......................  ..............  Attainment/Unclassifiable.
    Crenshaw County........................  ..............  Attainment/Unclassifiable.
    Cullman County.........................  ..............  Attainment/Unclassifiable.
    Dale County............................  ..............  Attainment/Unclassifiable.
    Dallas County..........................  ..............  Attainment/Unclassifiable.
    DeKalb County..........................  ..............  Attainment/Unclassifiable.
    Elmore County..........................  ..............  Attainment/Unclassifiable.
    Etowah County..........................  ..............  Attainment/Unclassifiable.
    Fayette County.........................  ..............  Attainment/Unclassifiable.
    Franklin County........................  ..............  Attainment/Unclassifiable.
    Geneva County..........................  ..............  Attainment/Unclassifiable.
    Greene County..........................  ..............  Attainment/Unclassifiable.
    Hale County............................  ..............  Attainment/Unclassifiable.
    Henry County...........................  ..............  Attainment/Unclassifiable.
    Houston County.........................  ..............  Attainment/Unclassifiable.
    Jackson County.........................  ..............  Attainment/Unclassifiable.
    Jefferson County.......................  ..............  Attainment/Unclassifiable.
    Lamar County...........................  ..............  Attainment/Unclassifiable.
    Lauderdale County......................  ..............  Attainment/Unclassifiable.
    Lawrence County........................  ..............  Attainment/Unclassifiable.
    Lee County.............................  ..............  Attainment/Unclassifiable.
    Limestone County.......................  ..............  Attainment/Unclassifiable.
    Lowndes County.........................  ..............  Attainment/Unclassifiable.
    Macon County...........................  ..............  Attainment/Unclassifiable.
    Madison County.........................  ..............  Attainment/Unclassifiable.
    Marengo County.........................  ..............  Attainment/Unclassifiable.
    Marion County..........................  ..............  Attainment/Unclassifiable.
    Marshall County........................  ..............  Attainment/Unclassifiable.
    Monroe County..........................  ..............  Attainment/Unclassifiable.
    Montgomery County......................  ..............  Attainment/Unclassifiable.
    Perry County...........................  ..............  Attainment/Unclassifiable.
    Pickens County.........................  ..............  Attainment/Unclassifiable.
    Randolph County........................  ..............  Attainment/Unclassifiable.
    Russell County.........................  ..............  Attainment/Unclassifiable.
    St. Clair County.......................  ..............  Attainment/Unclassifiable.
    Sumter County..........................  ..............  Attainment/Unclassifiable.
    Talladega County.......................  ..............  Attainment/Unclassifiable.
    Tallapoosa County......................  ..............  Attainment/Unclassifiable.
    Tuscaloosa County......................  ..............  Attainment/Unclassifiable.
    Walker County..........................  ..............  Attainment/Unclassifiable.
    Wilcox County..........................  ..............  Attainment/Unclassifiable.
    Winston 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\ The remainder of Shelby County will be designated by December 31, 2020.

* * * * *

0
3. Section 81.302 is amended by adding a table titled ``Alaska--2010
Sulfur Dioxide NAAQS (Primary)'' following the table titled ``Alaska--
1971 Sulfur Dioxide NAAQS (Primary and Secondary)'' to read as follows:

Sec.  81.302  Alaska.

* * * * *

                                   Alaska--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
Entire State...............................  ..............  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. Section 81.303 is amended by revising the table entitled ``Arizona--
2010 Sulfur Dioxide NAAQS (Primary)'' to read as follows:

Sec.  81.303  Arizona.

* * * * *

                                  Arizona--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
Hayden, AZ \3\.............................         10-4-13  Nonattainment.
    Gila County (part)
        The portions of Gila County that
         are bounded by: T4S, R14E; T4S,
         R15E; T4S, R16E; T5S, R15E; T5S,
         R16E
    Pinal County (part)
        The portions of Pinal County that
         are bounded by: T4S, R14E; T4S,
         R15E; T4S, R16E; T5S, R14E; T5S,
         R15E; T5S, R16E; T6S, R14E; T6S,
         R15E; T6S, R16E
Miami, AZ \3\..............................         10-4-13  Nonattainment.
    Gila County (part)
        The portions of Gila County that
         are bounded by: T2N, R14E; T2N,
         R15E; T1N, R13E; T1N, R14E; T1N,
         R15E; T1S, R14E; T1S, R14 1/2E;
         T1S, R15E
Coconino County (part).....................  ..............  Unclassifiable.
    The portions of Coconino County located
     within the Navajo Nation areas of
     Indian country within a 50-km radius
     of the Navajo Generating Station at
     the coordinates 39.904006 decimal
     degrees latitude and -111.389435
     decimal degrees longitude, using the
     1984 World Geodetic Survey datum.
Rest of State:
    Apache County (part) \4\...............  ..............  Attainment/Unclassifiable.
    Cochise County.........................  ..............  Attainment/Unclassifiable.
    Coconino County (part) \5\.............  ..............  Attainment/Unclassifiable.
    Gila County (part) \6\.................  ..............  Attainment/Unclassifiable.
    Graham County..........................  ..............  Attainment/Unclassifiable.
    Greenlee County........................  ..............  Attainment/Unclassifiable.
    Lands of the Hopi Tribe................  ..............  Attainment/Unclassifiable.
    La Paz County..........................  ..............  Attainment/Unclassifiable.
    Maricopa County........................  ..............  Attainment/Unclassifiable.
    Mohave County..........................  ..............  Attainment/Unclassifiable.
    Navajo County (part) \7\...............  ..............  Attainment/Unclassifiable.
    Lands of the Navajo Nation (part) \8\..  ..............  Attainment/Unclassifiable.
    Pima County............................  ..............  Attainment/Unclassifiable.
    Pinal County (part) \9\................  ..............  Attainment/Unclassifiable.
    Santa Cruz County......................  ..............  Attainment/Unclassifiable.
    Yavapai County.........................  ..............  Attainment/Unclassifiable.
    Yuma County............................  ..............  Attainment/Unclassifiable.
----------------------------------------------------------------------------------------------------------------
\1\ Includes 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\ Excludes Indian country located in each area, if any, unless otherwise specified.
\4\ Excludes lands of the White Mountain Apache Tribe.
\5\ Excludes lands of the Hopi Tribe and lands of the Navajo Nation.
\6\ Excludes the lands of the White Mountain Apache Tribe and the Hayden, AZ and Miami, AZ Nonattainment areas.
\7\ Includes all lands of the White Mountain Apache Tribe, including those lands of the White Mountain Apache
  Tribe geographically located in Apache County and Gila County, and excludes lands of the Hopi Tribe and lands
  of the Navajo Nation.
\8\ Includes all lands of the Navajo Nation except for the portions of the Navajo Nation lands designated
  Unclassifiable. Includes the lands of the Navajo Nation geographically located within the states of New Mexico
  and Utah.
\9\ Excludes the Hayden, AZ Nonattainment area.

* * * * *

0
5. Section 81.304 is amended by revising the table entitled
``Arkansas--2010 Sulfur Dioxide NAAQS (Primary)'' to read as follows:

Sec.  81.304  Arkansas.

* * * * *

                                  Arkansas--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
Independence County........................         9/12/16  Unclassifiable.
Arkansas County............................  ..............  Attainment/Unclassifiable.
Ashley County..............................  ..............  Attainment/Unclassifiable.
Baxter County..............................  ..............  Attainment/Unclassifiable.
Benton County..............................  ..............  Attainment/Unclassifiable.
Boone County...............................  ..............  Attainment/Unclassifiable.
Bradley County.............................  ..............  Attainment/Unclassifiable.
Calhoun County.............................  ..............  Attainment/Unclassifiable.
Carroll County.............................  ..............  Attainment/Unclassifiable.
Chicot County..............................  ..............  Attainment/Unclassifiable.
Clark County...............................  ..............  Attainment/Unclassifiable.
Clay County................................  ..............  Attainment/Unclassifiable.
Cleburne County............................  ..............  Attainment/Unclassifiable.
Cleveland County...........................  ..............  Attainment/Unclassifiable.
Columbia County............................  ..............  Attainment/Unclassifiable.
Conway County..............................  ..............  Attainment/Unclassifiable.
Craighead County...........................  ..............  Attainment/Unclassifiable.
Crawford County............................  ..............  Attainment/Unclassifiable.
Crittenden County..........................  ..............  Attainment/Unclassifiable.
Cross County...............................  ..............  Attainment/Unclassifiable.
Dallas County..............................  ..............  Attainment/Unclassifiable.
Desha County...............................  ..............  Attainment/Unclassifiable.
Drew County................................  ..............  Attainment/Unclassifiable.
Faulkner County............................  ..............  Attainment/Unclassifiable.
Franklin County............................  ..............  Attainment/Unclassifiable.
Fulton County..............................  ..............  Attainment/Unclassifiable.
Garland County.............................  ..............  Attainment/Unclassifiable.
Grant County...............................  ..............  Attainment/Unclassifiable.
Greene County..............................  ..............  Attainment/Unclassifiable.
Hempstead County...........................  ..............  Attainment/Unclassifiable.
Hot Spring County..........................  ..............  Attainment/Unclassifiable.
Howard County..............................  ..............  Attainment/Unclassifiable.
Izard County...............................  ..............  Attainment/Unclassifiable.
Jackson County.............................  ..............  Attainment/Unclassifiable.
Jefferson County...........................         9/12/16  Attainment/Unclassifiable.
Johnson County.............................  ..............  Attainment/Unclassifiable.
Lafayette County...........................  ..............  Attainment/Unclassifiable.
Lawrence County............................  ..............  Attainment/Unclassifiable.
Lee County.................................  ..............  Attainment/Unclassifiable.
Lincoln County.............................  ..............  Attainment/Unclassifiable.
Little River County........................  ..............  Attainment/Unclassifiable.
Logan County...............................  ..............  Attainment/Unclassifiable.
Lonoke County..............................  ..............  Attainment/Unclassifiable.
Madison County.............................  ..............  Attainment/Unclassifiable.
Marion County..............................  ..............  Attainment/Unclassifiable.
Miller County..............................  ..............  Attainment/Unclassifiable.
Mississippi County.........................  ..............  Attainment/Unclassifiable.
Monroe County..............................  ..............  Attainment/Unclassifiable.
Montgomery County..........................  ..............  Attainment/Unclassifiable.
Nevada County..............................  ..............  Attainment/Unclassifiable.
Newton County..............................  ..............  Attainment/Unclassifiable.
Ouachita County............................  ..............  Attainment/Unclassifiable.
Perry County...............................  ..............  Attainment/Unclassifiable.
Phillips County............................  ..............  Attainment/Unclassifiable.
Pike County................................  ..............  Attainment/Unclassifiable.
Poinsett County............................  ..............  Attainment/Unclassifiable.
Polk County................................  ..............  Attainment/Unclassifiable.
Pope County................................  ..............  Attainment/Unclassifiable.
Prairie County.............................  ..............  Attainment/Unclassifiable.
Pulaski County.............................  ..............  Attainment/Unclassifiable.
Randolph County............................  ..............  Attainment/Unclassifiable.
St. Francis County.........................  ..............  Attainment/Unclassifiable.
Saline County..............................  ..............  Attainment/Unclassifiable.
Scott County...............................  ..............  Attainment/Unclassifiable.
Searcy County..............................  ..............  Attainment/Unclassifiable.
Sebastian County...........................  ..............  Attainment/Unclassifiable.

Sevier County..............................  ..............  Attainment/Unclassifiable.
Sharp County...............................  ..............  Attainment/Unclassifiable.
Stone County...............................  ..............  Attainment/Unclassifiable.
Union County...............................  ..............  Attainment/Unclassifiable.
Van Buren County...........................  ..............  Attainment/Unclassifiable.
Washington County..........................  ..............  Attainment/Unclassifiable.
White County...............................  ..............  Attainment/Unclassifiable.
Woodruff County............................  ..............  Attainment/Unclassifiable.
Yell 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.

* * * * *

0
6. Section 81.305 is amended by adding a table titled ``California--
2010 Sulfur Dioxide NAAQS (Primary)'' following the table
``California--1971 Sulfur Dioxide NAAQS (Primary and Secondary)'' to
read as follows:

Sec.  81.305  California.

* * * * *

             California--2010 Sulfur Dioxide NAAQS (Primary)
------------------------------------------------------------------------
                                               Designation
      Designated area \1\       ----------------------------------------
                                    Date \2\               Type
------------------------------------------------------------------------
Great Basin Valleys Air Basin..  ..............  Attainment/
                                                  Unclassifiable.
    Alpine County..............
    Inyo County................
    Mono County................
Lake County Air Basin..........  ..............  Attainment/
                                                  Unclassifiable.
    Lake County................
Lake Tahoe Air Basin...........  ..............  Attainment/
                                                  Unclassifiable.
    El Dorado County (part)....
        That portion of El
         Dorado County within
         the drainage area
         naturally tributary to
         Lake Tahoe including
         said Lake.
    Placer County (part).......
        That portion of Placer
         County within the
         drainage area
         naturally tributary to
         Lake Tahoe including
         said Lake, plus that
         area in the vicinity
         of the head of the
         Truckee River
         described as follows:
         Commencing at the
         point common to the
         aforementioned
         drainage area
         crestline and the line
         common to Townships 15
         North and 16 North,
         M.D.B. & M., and
         following that line in
         a westerly direction
         to the northwest
         corner of Section 3,
         Township 15 North,
         Range 16 East, M.D.B.
         & M., thence south
         along the west line of
         Sections 3 and 10,
         Township 15 North,
         Range 16 East, M.D.B.
         & M., to the
         intersection with the
         said drainage area
         crestline, thence
         following the said
         drainage area boundary
         in a southeasterly
         direction, then
         northeasterly
         direction to and along
         the Lake Tahoe Dam,
         thence following the
         said drainage area
         crestline in a
         northeasterly, then
         northwesterly
         direction to the point
         of beginning.
Mojave Desert Air Basin........  ..............  Attainment/
                                                  Unclassifiable.
    Kern County (part).........

        That portion of Kern
         County east and south
         of a line described as
         follows: Beginning at
         the Kern-Los Angeles
         County boundary and
         running north and east
         along the northwest
         boundary of the Rancho
         La Libre Land Grant to
         the point of
         intersection with the
         range line common to
         R. 16 W. and R. 17 W.,
         San Bernardino Base
         and Meridian; north
         along the range line
         to the point of
         intersection with the
         Rancho El Tejon Land
         Grant boundary; then
         southeast, northeast,
         and northwest along
         the boundary of the
         Rancho El Tejon Land
         Grantto the northwest
         corner of S. 3, T. 11
         N., R. 17 W.; then
         west 1.2 miles; then
         north to the Rancho El
         Tejon Land Grant
         boundary; then
         northwest along the
         Rancho El Tejon line
         to the southeast
         corner of S. 34, T. 32
         S., R. 30 E., Mount
         Diablo Base and
         Meridian; then north
         to the northwest
         corner of S. 35, T. 31
         S., R. 30 E.; then
         northeast along the
         boundary of the Rancho
         El Tejon Land Grantto
         the southwest corner
         of S. 18, T. 31 S., R.
         31 E.; then east to
         the southeast corner
         of S. 13, T. 31 S., R.
         31 E.; then north
         along the range line
         common to R. 31 E. and
         R. 32 E., Mount Diablo
         Base and Meridian, to
         the northwest corner
         of S. 6, T. 29 S., R.
         32 E.; then east to
         the southwest corner
         of S. 31 T. 28 S., R.
         32E.; then north along
         the range line common
         to R. 31 E. and R. 32
         E. to the northwest
         corner of S. 6, T. 28
         S., R. 32 E., then
         west to the southeast
         corner of S. 36, T. 27
         S., R. 31 E., then
         north along the range
         line common to R. 31
         E. and R. 32 E. to the
         Kern-Tulare County
         boundary.
    Los Angeles County (part)..
        That portion of Los
         Angeles County which
         lies north and east of
         a line described as
         follows: Beginning at
         the Los Angeles-San
         Bernardino County
         boundary and running
         west along the
         township line common
         to T. 3 N and T. 2 N,
         San Bernardino Base
         and Meridian; then
         north along the range
         line common to R. 8 W
         and R. 9 W; then west
         along the township
         line common to T. 4 N
         and T. 3 N; then north
         along the range line
         common to R. 12 W and
         R. 13 W to the
         southeast corner of
         Section 12, T. 5 N, R.
         13 W; then west along
         the south boundaries
         of Sections 12, 11,
         10, 9, 8, 7, T. 5 N,
         R. 13 W to the
         boundary of the
         Angeles National
         Forest which is
         collinear with the
         range line common to
         R. 13 W and R. 14 W;
         then north and west
         along the Angeles
         National Forest
         boundary to the point
         of intersection with
         the township line
         common to T. 7 N and
         T. 6 N (point is at
         the northwest corner
         of Section 4 in T. 6
         N, R. 14 W); then west
         along the township
         line common to T. 7 N
         and T. 6 N; then north
         along the range line
         common to R. 15 W and
         R. 16 W to the
         southeast corner of
         Section 13, T. 7 N, R.
         16 W; then along the
         south boundaries of
         Sections 13, 14, 15,
         16, 17, 18, T. 7 N, R.
         16 W; then north along
         the range line common
         to R. 16 W and R. 17 W
         to the north boundary
         of the Angeles
         National Forest
         (collinear with
         township line common
         to T. 8 N and T. 7 N)
         then west and north
         along the Angeles
         National Forest
         boundary to the point
         of intersection with
         the south boundary of
         the Rancho La Liebre
         Land Grant; then west
         and north along this
         land grant boundary to
         the Los Angeles-Kern
         County boundary.
    Riverside County (part)....
        That portion of
         Riverside County which
         lies east of a line
         described as follows:
         That segment of the
         southwestern boundary
         line of Hydrologic
         Unit Number 18100100
         within Riverside
         County, further
         described as follows:
         Beginning at the
         Riverside-Imperial
         County boundary and
         running north along
         the range line common
         to R. 17 E. and R. 16
         E., San Bernardino
         Base and Meridian;
         then northwest along
         the ridge line of the
         Chuckwalla Mountains,
         through T. 8 S., R. 16
         E. and T. 7 S., R. 16
         E., until the Black
         Butte Mountain, elev.
         4504'; then west and
         northwest along the
         ridge line to the
         southwest corner of T.
         5 S., R. 14 E.; then
         north along the range
         line common to R. 14
         E. and R. 13 E.; then
         west and northwest
         along the ridge line
         to Monument Mountain,
         elev. 4834'; then
         southwest and then
         northwest along the
         ridge line of the
         Little San Bernardino
         Mountains to Quail
         Mountain, elev. 5814';
         then northwest along
         the ridge line to the
         Riverside-San
         Bernardino County line.
    San Bernardino County
     (part).
        That portion of San
         Bernardino County east
         and north of a line
         described as follows:
         Beginning at the San
         Bernardino-Riverside
         County boundary and
         running north along
         the range line common
         to R. 3 E and R. 2 E,
         San Bernardino Base
         and Meridian; then
         west along the
         township line common
         to T. 3 N and T. 2 N
         to the San Bernardino-
         Los Angeles County
         boundary.
Mountain Counties Air Basin....  ..............  Attainment/
                                                  Unclassifiable.
    Amador County..............
    Calaveras County...........
    El Dorado County (part)....
        All of El Dorado County
         except that portion
         included in the Lake
         Tahoe Air Basin.
    Mariposa County............
    Nevada County..............
    Placer County (part).......
        All of Placer County
         except that portion
         included in the Lake
         Tahoe Air Basin and
         that portion included
         in the Sacramento
         Valley Air Basin.
    Plumas County..............
    Sierra County..............
    Tuolumne County............
North Central Air Basin........  ..............  Attainment/
                                                  Unclassifiable.
    Monterey County............

    San Benito County..........
    Santa Cruz County..........
North Coast Air Basin..........  ..............  Attainment/
                                                  Unclassifiable.
    Del Norte County...........
    Humboldt County............
    Mendocino County...........
    Sonoma County (part).......
        That portion of Sonoma
         County which lies
         north and west of a
         line described as
         follows: Beginning at
         the southeasterly
         corner of the Rancho
         Estero Americano,
         being on the boundary
         line between Marin and
         Sonoma Counties,
         California; thence
         running northerly
         along the easterly
         boundary line of said
         Rancho Estero
         Americano to the
         northeasterly corner
         thereof, being an
         angle corner in the
         westerly boundary line
         of Rancho Canada de
         Jonive; thence running
         along said boundary of
         Rancho Canada de
         Jonive westerly,
         northerly and easterly
         to its intersection
         with the easterly line
         of Graton Road; thence
         running along the
         easterly and southerly
         line of Graton Road,
         northerly and easterly
         to its intersection
         with the easterly line
         of Sullivan Road;
         thence running
         northerly along said
         easterly line of
         Sullivan Road to the
         southerly line of
         Green Valley Road;
         thence running
         easterly along the
         said southerly line of
         Green Valley Road and
         easterly along the
         southerly line of
         State Highway 116, to
         the westerly line of
         Vine Hill Road; thence
         running along the
         westerly and northerly
         line of Vine Hill
         Road, northerly and
         easterly to its
         intersection with the
         westerly line of
         Laguna Road; thence
         running northerly
         along the westerly
         line of Laguna Road
         and the northerly
         projection thereof to
         the northerly line of
         Trenton Road; thence
         running westerly along
         the northerly line of
         said Trenton Road to
         the easterly line of
         Trenton-Healdsburg
         Road; thence running
         northerly along said
         easterly line of
         Trenton-Healdsburg
         Road to the easterly
         line of Eastside Road;
         thence running
         northerly along said
         easterly line of
         Eastside Road to its
         intersection with the
         southerly line of
         Rancho Sotoyome;
         thence running
         easterly along said
         southerly line of
         Rancho Sotoyome to its
         intersection with the
         Township line common
         to Townships 8 and 9
         North, M.D.M.; thence
         running easterly along
         said township line to
         its intersection with
         the boundary line
         between Sonoma and
         Napa Counties, State
         of California.
    Trinity County.............
Northeast Plateau Air Basin....  ..............  Attainment/
                                                  Unclassifiable.
    Lassen County..............
    Modoc County...............
    Siskiyou County............
Sacramento Valley Air Basin....  ..............  Attainment/
                                                  Unclassifiable.
    Butte County...............
    Colusa County..............
    Glenn County...............
    Placer County (part).......
        That portion of Placer
         County which lies west
         of Range 9 east,
         M.D.B. & M.
    Sacramento County..........
    Shasta County..............
    Solano County (part).......
        That portion of Solano
         County which lies
         north and east of a
         line described as
         follows: Beginning at
         the intersection of
         the westerly boundary
         of Solano County and
         the 1/4 section line
         running east and west
         through the center of
         Section 34, T6N, R2W,
         M.D.B. & M., thence
         east along said 1/4
         section line to the
         east boundary of
         Section 36, T6N, R2W,
         thence south 1/2 mile
         and east 2.0 miles,
         more or less, along
         the west and south
         boundary of Los Putos
         Rancho to the
         northwest corner of
         Section 4, T5N, R1W,
         thence east along a
         line common to T5N and
         T6N to the northeast
         corner of Section 3,
         T5N, R1E, thence south
         along section lines to
         the southeast corner
         of Section 10, T3N,
         R1E, thence east along
         section lines to the
         south 1/4 corner of
         Section 8, T3N, R2E,
         thence east to the
         boundary between
         Solano and Sacramento
         Counties.
    Sutter County..............
    Tehama County..............
    Yolo County................
    Yuba County................
Salton Sea Air Basin...........  ..............  Attainment/
                                                  Unclassifiable.
    Imperial County............
    Riverside County (part)....

        That portion of
         Riverside County which
         lies east of a line
         described as follows:
         Beginning at the
         Riverside-San Diego
         County boundary and
         running north along
         the range line common
         to R. 4 E and R. 3 E;
         then east along the
         township line common
         to T. 8 S and T. 7 S;
         then north along the
         range line common to
         R. 5 E and R. 4 E;
         then west along the
         township line common
         to T. 6 S and T. 7 S
         to the southwest
         corner of Section 34,
         T. 6 S, R. 4 E; then
         north along the west
         boundaries of Sections
         34, 27, 22, 15, 10, 3,
         T. 6 S, R. 4 E; then
         west along the
         township line common
         to T. 5 S and T. 6 S;
         then north along the
         range line common to
         R. 4 E and R. 3 E;
         then west along the
         south boundaries of
         Sections 13, 14, 15,
         16, 17 and 18, T. 5 S.
         R. 3 E; then north
         along the range line
         common to R. 2 E and
         R. 3 E to the
         Riverside-San
         Bernardino County
         line; and west of a
         line described as
         follows: That segment
         of the southwestern
         boundary line of
         Hydrologic Unit Number
         18100100 within
         Riverside County,
         further described as
         follows: Beginning at
         the Riverside-Imperial
         County boundary and
         running north along
         the range line common
         to R. 17 E. and R. 16
         E., San Bernardino
         Base and Meridian;
         then northwest along
         the ridge line of the
         Chuckwalla Mountains,
         through T. 8 S., R. 16
         E. and T. 7 S., R. 16
         E., until the Black
         Butte Mountain, elev.
         4504'; then west and
         northwest along the
         ridge line to the
         southwest corner of T.
         5 S., R. 14 E.; then
         north along the range
         line common to R. 14
         E. and R. 13 E.; then
         west and northwest
         along the ridge line
         to Monument Mountain,
         elev. 4834'; then
         southwest and then
         northwest along the
         ridge line of the
         Little San Bernardino
         Mountains to Quail
         Mountain, elev. 5814';
         then northwest along
         the ridge line to the
         Riverside-San
         Bernardino County line.
San Diego Air Basin............  ..............  Attainment/
                                                  Unclassifiable.
    San Diego County...........
San Francisco Bay Area Air       ..............  Attainment/
 Basin.                                           Unclassifiable.
    Alameda County.............
    Contra Costa County........
    Marin County...............
    Napa County................
    San Francisco County.......
    San Mateo County...........
    Santa Clara County.........
    Solano County (part).......
        That portion of Solano
         County which lies
         south and west of a
         line described as
         follows: Beginning at
         the intersection of
         the westerly boundary
         of Solano County and
         the 1/4 section line
         running east and west
         through the center of
         Section 34, T6N, R2W,
         M.D.B. & M., thence
         east along said 1/4
         section line to the
         east boundary of
         Section 36, T6N, R2W,
         thence south 1/2 mile
         and east 2.0 miles,
         more or less, along
         the west and south
         boundary of Los Putos
         Rancho to the
         northwest corner of
         Section 4, T5N, R1W,
         thence east along a
         line common to T5N and
         T6N to the northeast
         corner of Section 3,
         T5N, R1E, thence south
         along section lines to
         the southeast corner
         of Section 10, T3N,
         R1E, thence east along
         section lines to the
         south 1/4 corner of
         Section 8, T3N, R2E,
         thence east to the
         boundary between
         Solano and Sacramento
         Counties.
    Sonoma County (part).......
        That portion of Sonoma
         County which lies
         south and east of a
         line described as
         follows: Beginning at
         the southeasterly
         corner of the Rancho
         Estero Americano,
         being on the boundary
         line between Marin and
         Sonoma Counties,
         California; thence
         running northerly
         along the easterly
         boundary line of said
         Rancho Estero
         Americano to the
         northeasterly corner
         thereof, being an
         angle corner in the
         westerly boundary line
         of Rancho Canada de
         Jonive; thence running
         along said boundary of
         Rancho Canada de
         Jonive westerly,
         northerly and easterly
         to its intersection
         with the easterly line
         of Graton Road; thence
         running along the
         easterly and southerly
         line of Graton Road,
         northerly and easterly
         to its intersection
         with the easterly line
         of Sullivan Road;
         thence running
         northerly along said
         easterly line of
         Sullivan Road to the
         southerly line of
         Green Valley Road;
         thence running
         easterly along the
         said southerly line of
         Green Valley Road and
         easterly along the
         southerly line of
         State Highway 116, to
         the westerly line of
         Vine Hill Road; thence
         running along the
         westerly and northerly
         line of Vine Hill
         Road, northerly and
         easterly to its
         intersection with the
         westerly line of
         Laguna Road; thence
         running northerly
         along the westerly
         line of Laguna Road
         and the northerly
         projection thereof to
         the northerly line of
         Trenton Road; thence
         running westerly along
         the northerly line of
         said Trenton Road to
         the easterly line of
         Trenton-Healdsburg
         Road; thence running
         northerly along said
         easterly line of
         Trenton-Healdsburg
         Road to the easterly
         line of Eastside Road;
         thence running
         northerly along said
         easterly line of
         Eastside Road to its
         intersection with the
         southerly line of
         Rancho Sotoyome;
         thence running
         easterly along said
         southerly line of
         Rancho Sotoyome to its
         intersection with the
         Township line common
         to Townships 8 and 9
         North, M.D.M.; thence
         running easterly along
         said township line to
         its intersection with
         the boundary line
         between Sonoma and
         Napa Counties, State
         of California.
San Joaquin Valley Air Basin...  ..............  Attainment/
                                                  Unclassifiable.
    Fresno County..............
    Kern County (part).........

        That portion of Kern
         County which lies west
         and north of a line
         described as follows:
         Beginning at the Kern-
         Los Angeles County
         boundary and running
         north and east along
         the northwest boundary
         of the Rancho La Libre
         Land Grant to the
         point of intersection
         with the range line
         common to R. 16 W. and
         R. 17 W., San
         Bernardino Base and
         Meridian; north along
         the range line to the
         point of intersection
         with the Rancho El
         Tejon Land Grant
         boundary; then
         southeast, northeast,
         and northwest along
         the boundary of the
         Rancho El Tejon Land
         Grant to the northwest
         corner of S. 3, T. 11
         N., R. 17 W.; then
         west 1.2 miles; then
         north to the Rancho El
         Tejon Land Grant
         boundary; then
         northwest along the
         Rancho El Tejon line
         to the southeast
         corner of S. 34, T. 32
         S., R. 30 E., Mount
         Diablo Base and
         Meridian; then north
         to the northwest
         corner of S. 35, T. 31
         S., R. 30 E.; then
         northeast along the
         boundary of the Rancho
         El Tejon Land Grant to
         the southwest corner
         of S. 18, T. 31 S., R.
         31 E.; then east to
         the southeast corner
         of S. 13, T. 31 S., R.
         31 E.; then north
         along the range line
         common to R. 31 E. and
         R. 32 E., Mount Diablo
         Base and Meridian, to
         the northwest corner
         of S. 6, T. 29 S., R.
         32 E.; then east to
         the southwest corner
         of S. 31, T. 28 S., R.
         32 E.; then north
         along the range line
         common to R. 31 E. and
         R. 32 E. to the
         northwest corner of S.
         6, T. 28 S., R. 32 E.,
         then west to the
         southeast corner of S.
         36, T. 27 S., R. 31
         E., then north along
         the range line common
         to R. 31 E. and R. 32
         E. to the Kern-Tulare
         County boundary.
    Kings County...............
    Madera County..............
    Merced County..............
    San Joaquin County.........
    Stanislaus County..........
    Tulare County..............
South Central Air Basin........  ..............  Attainment/
                                                  Unclassifiable.
    San Luis Obispo County.....
    Santa Barbara County.......
    Ventura County.............
South Coast Air Basin..........  ..............  Attainment/
                                                  Unclassifiable.
    Los Angeles County (part)..
        That portion of Los
         Angeles County which
         lies south and west of
         a line described as
         follows: Beginning at
         the Los Angeles-San
         Bernardino County
         boundary and running
         west along the
         township line common
         to T.3 N and T.2 N,
         San Bernardino Base
         and Meridian; then
         north along the range
         line common to R.8 W
         and R.9 W; then west
         along the township
         line common to T.4 N
         and T.3 N; then north
         along the range line
         common to R.12 W and
         R.13 W to the
         southeast corner of
         Section 12, T.5 N, R.
         13 W; then west along
         the south boundaries
         of Sections 12, 11,
         10, 9, 8, 7, T.5 N, R.
         13 W to the boundary
         of the Angeles
         National Forest which
         is collinear with the
         range line common to
         R. 13 W and R. 14 W;
         then north and west
         along the Angeles
         National Forest
         boundary to the point
         of intersection with
         the township line
         common to T.7 N and T.
         6 N (point is at the
         northwest corner of
         Section 4 in T.6 N, R.
         14 W); then west along
         the township line
         common to T.7 N and
         T.6 N; then north
         along the range line
         common to R. 15 W and
         R. 16 W to the
         southeast corner of
         Section 13, T.7 N, R.
         16 W; then along the
         south boundaries of
         Sections 13, 14, 15,
         16, 17, 18, T.7 N, R.
         16 W; then north along
         the range line common
         to R.16 W and R. 17 W
         to the north boundary
         of the Angeles
         National Forest
         (collinear with
         township line common
         to T.8 N and T.7 N);
         then west and north
         along the Angeles
         National Forest
         boundary to the point
         of intersection with
         the south boundary of
         the Rancho La Liebre
         Land Grant; then west
         and north along this
         land grant boundary to
         the Los Angeles-Kern
         County boundary.
    Orange County..............
    Riverside County (part)....
        That portion of
         Riverside County which
         lies west of a line
         described as follows:
         Beginning at the
         Riverside-San Diego
         County boundary and
         running north along
         the range line common
         to R. 4 E and R. 3 E;
         then east along the
         township line common
         to T. 8 S and T. 7 S;
         then north along the
         range line common to
         R. 5 E and R. 4 E;
         then west along the
         township line common
         to T. 6 S and T. 7 S
         to the southwest
         corner of Section 34,
         T. 6 S, R. 4 E; then
         north along the west
         boundaries of Sections
         34, 27, 22, 15, 10, 3,
         T. 6 S, R. 4 E; then
         west along the
         township line common
         to T. 5 S and T. 6 S;
         then north along the
         range line common to
         R. 4 E and R. 3 E;
         then west along the
         south boundaries of
         Sections 13, 14, 15,
         16, 17 and 18, T. 5 S.
         R. 3 E; then north
         along the range line
         common to R. 2 E and
         R. 3 E to the
         Riverside-San
         Bernardino County line.
    San Bernardino County
     (part).
        That portion of San
         Bernardino County west
         and south of a line
         described as follows:
         Beginning at the San
         Bernardino-Riverside
         County boundary and
         running north along
         the range line common
         to R. 3 E and R. 2 E;
         then west along the
         township line common
         to T. 3 N and T. 2 N
         to the San Bernardino-
         Los Angeles County
         boundary.
------------------------------------------------------------------------
\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. Section 81.306 is amended by revising the table entitled
``Colorado--2010 Sulfur Dioxide NAAQS (Primary)'' to read as follows:

Sec.  81.306   Colorado.

* * * * *

                                  Colorado--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \3\                             Type
----------------------------------------------------------------------------------------------------------------
Colorado Springs, CO.......................         9/12/16  Unclassifiable.
    El Paso County (part)
        Manitou Springs
        Colorado Springs (and certain
         unincorporated areas) as follows;
         Areas east of the western city
         limits of Colorado Springs, north
         of the southern city limits of
         Colorado Springs with the addition
         of the area termed ``Stratmoor''
         bounded on the south by South
         Academy Boulevard, west of Powers
         Blvd, and south of East Woodman
         Blvd (east of Academy Blvd. N) and
         the northern city limits of
         Colorado Springs (west of Academy
         Blvd. N).
Eastern Morgan County, CO..................         9/12/16  Unclassifiable.
    Morgan County (part)
        Circle with a 12-kilometer radius
         centered on the Pawnee Power Plant
State AQCR 01 (remainder)..................  ..............  Attainment/Unclassifiable.
    Logan County
    Morgan County (part) (remainder)
    Phillips County
    Sedgwick County
    Washington County
    Yuma County
State AQCR 02..............................  ..............  Attainment/Unclassifiable.
    Larimer County
    Weld County
State AQCR 03..............................  ..............  Attainment/Unclassifiable.
    Adams County
    Arapahoe County
    Boulder County
    Broomfield County
    Clear Creek County
    Denver County
    Douglas County
    Gilpin County
    Jefferson County
State AQCR 04 (remainder)..................  ..............  Attainment/Unclassifiable.
    El Paso County (part) (remainder)
    Park County
    Teller County
State AQCR 05..............................  ..............  Attainment/Unclassifiable.
    Cheyenne County
    Elbert County
    Kit Carson County
    Lincoln County
State AQCR 06..............................  ..............  Attainment/Unclassifiable.
    Baca County
    Bent County
    Crowley County
    Kiowa County
    Otero County
    Prowers County
State AQCR 07..............................  ..............  Attainment/Unclassifiable.
    Huerfano
    Las Animas
    Pueblo
State AQCR 08..............................  ..............  Attainment/Unclassifiable.
    Alamosa County
    Conejos County
    Costilla County
    Mineral County
    Rio Grande County
    Saguache County
State AQCR 09..............................  ..............  Attainment/Unclassifiable.
    Archuleta County \2\
    Dolores
    La Plata \2\
    Montezuma \2\
    San Juan
State AQCR 10..............................  ..............  Attainment/Unclassifiable.

    Delta County
    Gunnison County
    Hinsdale County
    Montrose County
    Ouray County
    San Miguel County
State AQCR 11..............................  ..............  Attainment/Unclassifiable.
    Garfield County
    Mesa County
    Moffat County
    Rio Blanco County
State AQCR 12..............................  ..............  Attainment/Unclassifiable.
    Eagle County
    Grand County
    Jackson County
    Pitkin County
    Routt County
    Summit County
State AQCR 13..............................  ..............  Attainment/Unclassifiable.
    Chaffee County
    Custer County
    Fremont County
    Lake County
Southern Ute Indian Reservation............  ..............  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\ Does not include the Southern Ute Indian Reservation, which is being designated separately.
\3\ This date is April 9, 2018, unless otherwise noted.

* * * * *

0
8. Section 81.307 is amended by adding a table entitled ``Connecticut--
2010 Sulfur Dioxide NAAQS (Primary)'' following the table
``Connecticut--1971 Sulfur Dioxide NAAQS (Primary and Secondary)'' to
read as follows:

Sec.  81.307   Connecticut.

* * * * *

                                Connecticut--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
State of Connecticut.......................  ..............  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. Section 81.308 is amended by adding a new table entitled
``Delaware--2010 Sulfur Dioxide NAAQS (Primary)'' following the table
``Delaware--1971 Sulfur Dioxide NAAQS (Primary and Secondary)'' to read
as follows:

Sec.  81.308   Delaware.

* * * * *

                                  Delaware--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
Entire State...............................  ..............  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. Section 81.309 is amended by adding a table titled ``District of
Columbia--2010 Sulfur Dioxide NAAQS (Primary)'' following the table
titled ``District of Columbia--1971 Sulfur Dioxide NAAQS (Primary and
Secondary)'' to read as follows:

Sec.  81.309   District of Columbia.

* * * * *

                            District of Columbia--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
            Designated area \1\             --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
District of Columbia.......................  ..............  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. Section 81.310 is amended by revising the table entitled
``Florida--2010 Sulfur Dioxide NAAQS (Primary)'' to read as follows:

Sec.  81.310  Florida.

* * * * *

                                  Florida--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
              Designated area               --------------------------------------------------------------------
                                                Date \1\                             Type
----------------------------------------------------------------------------------------------------------------
Hillsborough County, FL \2\................         10/4/13  Nonattainment.
    Hillsborough County (part)
        That portion of Hillsborough County
         encompassed by the polygon with
         the vertices using Universal
         Traverse Mercator (UTM)
         coordinates in UTM zone 17 with
         datum NAD83 as follows: (1)
         Vertices-UTM Easting (m) 358581,
         UTM Northing 3076066; (2) vertices-
         UTM Easting (m) 355673, UTM
         Northing 3079275; (3) UTM Easting
         (m) 360300, UTM Northing 3086380;
         (4) vertices-UTM Easting (m)
         366850, UTM Northing 3086692; (5)
         vertices-UTM Easting (m) 368364,
         UTM Northing 3083760; and (6)
         vertices-UTM Easting (m) 365708,
         UTM Northing 3079121
Hillsborough--Polk County, FL \3\..........  ..............  Nonattainment.
    Hillsborough County (part)
    Polk County (part)
        That portion of Hillsborough and
         Polk Counties encompassed by the
         polygon with the vertices using
         Universal Traverse Mercator (UTM)
         coordinates in UTM zone 17 with
         datum NAD83 as follows: 390,500 E,
         3,073,500 N; 390,500 E, 3,083,500
         N; 400,500 E, 3,083,500 N; 400,500
         E, 3,073,500 N
Nassau County, FL \2\......................         10/4/13  Nonattainment.
    Nassau County (part)
        That portion of Nassau County
         encompassing the circular boundary
         with the center being UTM Easting
         455530 meters, UTM Northing
         3391737 meters, UTM zone 17, using
         the NAD83 datum (the location of
         the violating ambient monitor) and
         the radius being 2.4 kilometers
Citrus County, FL \3\......................  ..............  Unclassifiable.
    Citrus County (part)
        Census Block Groups 4504004 and
         4505002
Mulberry, FL Area \3\......................  ..............  Unclassifiable.
    Hillsborough County (part)
    Polk County (part)
        That portion of Hillsborough and
         Polk Counties encompassed by the
         polygon with the vertices using
         Universal Traverse Mercator (UTM)
         coordinates in UTM zone 17 with
         datum NAD83 starting with the
         Northwest Corner and proceeding to
         the Northeast as follows: 390,500
         E, 3,083,500 N; 410,700 E,
         3,091,600 N; 412,900 E, 3,089,800
         N; 412,900 E, 3,084,600 N; 400,500
         E, 3,073,500 N; 400,500 E,
         3,083,500 N
Rest of State: \3\
    Alachua County.........................  ..............  Attainment/Unclassifiable.
    Baker County...........................  ..............  Attainment/Unclassifiable.
    Bay County.............................  ..............  Attainment/Unclassifiable.
    Bradford County........................  ..............  Attainment/Unclassifiable.
    Brevard County.........................  ..............  Attainment/Unclassifiable.
    Broward County.........................  ..............  Attainment/Unclassifiable.
    Calhoun County.........................  ..............  Attainment/Unclassifiable.
    Charlotte County.......................  ..............  Attainment/Unclassifiable.
    Citrus County (part) (remainder).......  ..............  Attainment/Unclassifiable.
    Clay County............................  ..............  Attainment/Unclassifiable.
    Collier County.........................  ..............  Attainment/Unclassifiable.
    Columbia County........................  ..............  Attainment/Unclassifiable.

    DeSoto County..........................  ..............  Attainment/Unclassifiable.
    Dixie County...........................  ..............  Attainment/Unclassifiable.
    Duval County...........................  ..............  Attainment/Unclassifiable.
    Escambia County........................  ..............  Attainment/Unclassifiable.
    Flagler County.........................  ..............  Attainment/Unclassifiable.
    Franklin County........................  ..............  Attainment/Unclassifiable.
    Gadsden County.........................  ..............  Attainment/Unclassifiable.
    Gilchrist County.......................  ..............  Attainment/Unclassifiable.
    Glades County..........................  ..............  Attainment/Unclassifiable.
    Gulf County............................  ..............  Attainment/Unclassifiable.
    Hamilton County........................  ..............  Attainment/Unclassifiable.
    Hardee County..........................  ..............  Attainment/Unclassifiable.
    Hendry County..........................  ..............  Attainment/Unclassifiable.
    Hernando County........................  ..............  Attainment/Unclassifiable.
    Highlands County.......................  ..............  Attainment/Unclassifiable.
    Hillsborough County (part) (remainder).  ..............  Attainment/Unclassifiable.
    Holmes County..........................  ..............  Attainment/Unclassifiable.
    Indian River County....................  ..............  Attainment/Unclassifiable.
    Jackson County.........................  ..............  Attainment/Unclassifiable.
    Jefferson County.......................  ..............  Attainment/Unclassifiable.
    Lafayette County.......................  ..............  Attainment/Unclassifiable.
    Lake County............................  ..............  Attainment/Unclassifiable.
    Lee County.............................  ..............  Attainment/Unclassifiable.
    Leon County............................  ..............  Attainment/Unclassifiable.
    Levy County............................  ..............  Attainment/Unclassifiable.
    Liberty County.........................  ..............  Attainment/Unclassifiable.
    Madison County.........................  ..............  Attainment/Unclassifiable.
    Manatee County.........................  ..............  Attainment/Unclassifiable.
    Marion County..........................  ..............  Attainment/Unclassifiable.
    Martin County..........................  ..............  Attainment/Unclassifiable.
    Miami-Dade County......................  ..............  Attainment/Unclassifiable.
    Monroe County..........................  ..............  Attainment/Unclassifiable.
    Nassau County (part) (remainder).......  ..............  Attainment/Unclassifiable.
    Okaloosa County........................  ..............  Attainment/Unclassifiable.
    Okeechobee County......................  ..............  Attainment/Unclassifiable.
    Orange County..........................  ..............  Attainment/Unclassifiable.
    Osceola County.........................  ..............  Attainment/Unclassifiable.
    Palm Beach County......................  ..............  Attainment/Unclassifiable.
    Pasco County...........................  ..............  Attainment/Unclassifiable.
    Pinellas County........................  ..............  Attainment/Unclassifiable.
    Polk County (part) (remainder).........  ..............  Attainment/Unclassifiable.
    Putnam County..........................  ..............  Attainment/Unclassifiable.
    St. Johns County.......................  ..............  Attainment/Unclassifiable.
    St. Lucie County.......................  ..............  Attainment/Unclassifiable.
    Santa Rosa County......................  ..............  Attainment/Unclassifiable.
    Sarasota County........................  ..............  Attainment/Unclassifiable.
    Seminole County........................  ..............  Attainment/Unclassifiable.
    Sumter County..........................  ..............  Attainment/Unclassifiable.
    Suwannee County........................  ..............  Attainment/Unclassifiable.
    Taylor County..........................  ..............  Attainment/Unclassifiable.
    Union County...........................  ..............  Attainment/Unclassifiable.
    Volusia County.........................  ..............  Attainment/Unclassifiable.
    Wakulla County.........................  ..............  Attainment/Unclassifiable.
    Walton County..........................  ..............  Attainment/Unclassifiable.
    Washington County......................  ..............  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, 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
12. Section 81.311 is amended by revising the table entitled
``Georgia--2010 Sulfur Dioxide NAAQS (Primary)'' to read as follows:

Sec.  81.311   Georgia.

* * * * *

                                  Georgia--2010 Sulfur Dioxide NAAQS (Primary)
----------------------------------------------------------------------------------------------------------------
                                                                         Designation
          Designated area \1\ \3\           --------------------------------------------------------------------
                                                Date \2\                             Type
----------------------------------------------------------------------------------------------------------------
Juliette, GA...............................         9/12/16  Attainment/Unclassifiable.
    Butts County
    Crawford County
    Jasper County
    Jones County
    Lamar County
    Monroe County
    Upson County
Rest of State: \3\
    Appling County.........................  ..............  Attainment/Unclassifiable.
    Atkinson County........................  ..............  Attainment/Unclassifiable.
    Bacon County...........................  ..............  Attainment/Unclassifiable.
    Baker County...........................  ..............  Attainment/Unclassifiable.
    Baldwin County.........................  ..............  Attainment/Unclassifiable.
    Banks County...........................  ..............  Attainment/Unclassifiable.
    Barrow County..........................  ..............  Attainment/Unclassifiable.
    Bartow County..........................  ..............  Attainment/Unclassifiable.
    Ben Hill County........................  ..............  Attainment/Unclassifiable.
    Berrien County.........................  ..............  Attainment/Unclassifiable.
    Bibb County............................  ..............  Attainment/Unclassifiable.
    Bleckley County........................  ..............  Attainment/Unclassifiable.
    Brantley County........................  ..............  Attainment/Unclassifiable.
    Brooks County..........................  ..............  Attainment/Unclassifiable.
    Bryan County...........................  ..............  Attainment/Unclassifiable.
    Bulloch County.........................  ..............  Attainment/Unclassifiable.
    Burke County...........................  ..............  Attainment/Unclassifiable.
    Calhoun County.........................  ..............  Attainment/Unclassifiable.
    Camden County..........................  ..............  Attainment/Unclassifiable.
    Candler County.........................  ..............  Attainment/Unclassifiable.
    Carroll County.........................  ..............  Attainment/Unclassifiable.
    Catoosa County.........................  ..............  Attainment/Unclassifiable.
    Charlton County........................  ..............  Attainment/Unclassifiable.
    Chatham County.........................  ..............  Attainment/Unclassifiable.
    Chattahoochee County...................  ..............  Attainment/Unclassifiable.
    Chattooga County.......................  ..............  Attainment/Unclassifiable.
    Cherokee County........................  ..............  Attainment/Unclassifiable.
    Clarke County..........................  ..............  Attainment/Unclassifiable.
    Clay County............................  ..............  Attainment/Unclassifiable.
    Clayton County.........................  ..............  Attainment/Unclassifiable.
    Clinch County..........................  ..............  Attainment/Unclassifiable.
    Cobb County............................  ..............  Attainment/Unclassifiable.
    Coffee County..........................  ..............  Attainment/Unclassifiable.
    Colquitt County........................  ..............  Attainment/Unclassifiable.
    Columbia County........................  ..............  Attainment/Unclassifiable.
    Cook County............................  ..............  Attainment/Unclassifiable.
    Coweta County..........................  ..............  Attainment/Unclassifiable.
    Crisp County...........................  ..............  Attainment/Unclassifiable.
    Dade County............................  ..............  Attainment/Unclassifiable.
    Dawson County..........................  ..............  Attainment/Unclassifiable.
    Decatur County.........................  ..............  Attainment/Unclassifiable.
    DeKalb County..........................  ..............  Attainment/Unclassifiable.
    Dodge County...........................  ..............  Attainment/Unclassifiable.
    Dooly County...........................  ..............  Attainment/Unclassifiable.
    Dougherty County.......................  ..............  Attainment/Unclassifiable.
    Douglas County.........................  ..............  Attainment/Unclassifiable.
    Early County...........................  ..............  Attainment/Unclassifiable.