Rule2025-20197
Air Plan Approval; IA, Muscatine; 2010 1-Hour SO2 Maintenance Plan and Redesignation
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
November 18, 2025
Effective
December 18, 2025
Issuing agencies
Environmental Protection Agency
Abstract
The Environmental Protection Agency (EPA) is taking final action to redesignate the nonattainment area in Muscatine County, Iowa to attainment for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS). The EPA is also approving Iowa's maintenance plan for the 2010 1-hour SO<INF>2</INF> NAAQS for the Muscatine nonattainment area and approving modifications to source-specific permits in the Iowa State Implementation Plan (SIP). The EPA is taking this action in accordance with the requirements of the Clean Air Act (CAA).
Full Text
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<title>Federal Register, Volume 90 Issue 220 (Tuesday, November 18, 2025)</title>
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[Federal Register Volume 90, Number 220 (Tuesday, November 18, 2025)]
[Rules and Regulations]
[Pages 51554-51559]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-20197]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Parts 52 and 81
[EPA-R07-OAR-2025-0818; FRL-12901-02-R7]
Air Plan Approval; IA, Muscatine; 2010 1-Hour SO2 Maintenance
Plan and Redesignation
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
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SUMMARY: The Environmental Protection Agency (EPA) is taking final
action to redesignate the nonattainment area in Muscatine County, Iowa
to attainment for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>)
National Ambient Air Quality Standard (NAAQS). The EPA is also
approving Iowa's maintenance plan for the 2010 1-hour SO<INF>2</INF>
NAAQS for the Muscatine nonattainment area and approving modifications
to source-specific permits in the Iowa State Implementation Plan (SIP).
The EPA is taking this action in accordance with the requirements of
the Clean Air Act (CAA).
DATES: This final rule is effective on December 18, 2025.
ADDRESSES: The EPA has established a docket for this action under
Docket ID No. EPA-R07-OAR-2025-0818. All documents in the docket are
listed on the <a href="https://www.regulations.gov">https://www.regulations.gov</a> website. Although listed in
the index, some information is not publicly available, i.e.,
Confidential Business Information (CBI) or other information whose
disclosure is restricted by statute. Certain other material, such as
copyrighted material, is not placed on the internet and will be
publicly available only in hard copy form. Publicly available docket
materials are available through <a href="https://www.regulations.gov">https://www.regulations.gov</a> or please
contact the person identified in the FOR FURTHER INFORMATION CONTACT
section for additional information.
FOR FURTHER INFORMATION CONTACT: Bethany Olson, Environmental
Protection Agency, Region 7 Office, Air Quality Planning Branch, 11201
Renner Boulevard, Lenexa, Kansas 66219; telephone number: (913) 551-
7905; email address: <a href="/cdn-cgi/l/email-protection#650a09160a0b4b0700110d040b1c250015044b020a13"><span class="__cf_email__" data-cfemail="cba4a7b8a4a5e5a9aebfa3aaa5b28baebbaae5aca4bd">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION: Throughout this document ``we,'' ``us,'' and
``our'' refer to EPA.
Table of Contents
I. What is being addressed in this document?
II. Background
III. Have the requirements for approval of a SIP revision been met?
IV. What action is the EPA taking?
V. Incorporation by Reference
VI. Statutory and Executive Order Reviews
I. What is being addressed in this document?
The EPA is taking final action to approve a SIP revision and
redesignation request submitted on November 17, 2021, by the Iowa
Department of Natural Resources (IDNR). The EPA is taking the following
three separate but related actions: (1) to add new or revised permits
for Muscatine area sources into the Iowa SIP and remove certain air
construction permits from the SIP; (2) to approve Iowa's maintenance
plan for the 2010 1-hour SO<INF>2</INF> NAAQS in the Muscatine area and
incorporate it into the SIP; and (3) to redesignate the Muscatine area
to attainment for the 2010 1-hour SO<INF>2</INF> NAAQS.
The EPA finds that the State's submittal meets the requirements for
redesignation under the CAA and the revisions do not interfere with any
applicable requirement concerning attainment and reasonable further
progress. The full State submission is included in the docket for this
action.
II. Background
On June 2, 2010 (75 FR 35520), the EPA signed the revised the
primary SO<INF>2</INF> NAAQS, establishing a new 1-hour standard of 75
parts per billion (ppb). Following promulgation of a new or revised
NAAQS, the EPA is required by CAA section 107(d) to designate areas
throughout the nation as attaining or not attaining the NAAQS, or as
unclassifiable. On August 5, 2013, the EPA designated a portion of
Muscatine County, Iowa, as nonattainment for the 2010 primary 1-hour
SO<INF>2</INF> NAAQS (78 FR 47191), effective October 4, 2013.
Iowa submitted an attainment plan for the Muscatine area on May 26,
2016. Iowa's approved 2016 attainment plan provided a modeled
attainment demonstration and the required nonattainment planning
requirements for the Muscatine NAA. The attainment plan included permit
conditions to reduce SO<INF>2</INF> emissions at three facilities in
the NAA: Grain Processing Corporation (GPC), Muscatine Power and Water
(MPW), and Monsanto Company--Muscatine (Monsanto), now
[[Page 51555]]
Bayer CropScience LP.\1\ The conditions are contained in air
construction permits issued by IDNR and were approved into the SIP as
part of the attainment plan approval.\2\ The EPA issued a final
approval of Iowa's attainment plan on November 17, 2020 (85 FR 73218).
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\1\ The Monsanto facility in Muscatine is now under the
ownership of Bayer CropScience LP. This document retains use of the
Monsanto name for consistency with the Iowa submittal. Bayer
CropScience L.P. assumed all construction permits for Monsanto that
are relevant to this action.
\2\ 85 FR 73218, November 17, 2020.
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On November 17, 2021, Iowa submitted a redesignation request and
maintenance plan for the Muscatine nonattainment area for the 2010
SO<INF>2</INF> NAAQS. The submission also included modifications to
SIP-approved permits for GPC, MPW, and Monsanto. The submitted permit
revisions replace some specific conditions that the EPA had previously
approved into the SIP for the purpose of demonstrating attainment of
the SO<INF>2</INF> standard pursuant to the nonattainment requirements
of sections 172, 191, and 192 of the CAA.
On January 26, 2022, the EPA proposed to determine that the
Muscatine NAA attained the 2010 1-hour SO<INF>2</INF> NAAQS by the
applicable attainment date of October 4, 2018 (87 FR 3958). The EPA
issued a final determination of attainment by the attainment date for
the 2010 1-hour SO<INF>2</INF> NAAQS on April 7, 2022 (87 FR 20329).
On August 21, 2025 (90 FR 40797), the EPA proposed to approve
Iowa's 2021 redesignation request and maintenance plan for the
Muscatine area for the 2010 SO<INF>2</INF> NAAQS. An explanation of the
CAA requirements, a detailed analysis of the revisions, and EPA's
reasons for proposing approval were provided in the notice of proposed
rulemaking (NPRM) and will not be restated here.
The EPA also proposed to approve revisions to SIP-approved permits.
The submitted revisions remove outdated permits, add new permits, and
modify SIP-approved permits. The air construction permits include
reasonably available control technology (RACT) limits for the 2010 1-
hour SO<INF>2</INF> NAAQS, compliance monitoring, and recordkeeping and
reporting requirements at GPC, MPW, and Monsanto. The emission limits
establish the maximum permitted allowable emission rate for each
emission point, and Iowa provided updated dispersion modeling in its
2021 SIP submission based on these conditions. The new and modified
permits are contained in Attachments 1 through 3 of the State submittal
in the docket for this action.
The requested permit revisions are as follows:
<bullet> Remove twelve GPC permits relied upon in the 2016
attainment plan for emission points (stacks) no longer in service. The
GPC permit numbers are 15-A-078, 79-A-194-S2, 74-A-014-S1, 74-A-015-S2,
79-A-195-S2, 71-A-067-S4, 15-A-202, 15-A-209, 11-A-338-S1, 15-A-354,
05-A-926-S4, 75-A-087-S1.
<bullet> Remove eight permits from the SIP due to the revocation of
the 24-hour and annual primary SO<INF>2</INF> NAAQS. The numbers are
GPC permits 74-A-015-S, 79-A-194-S, 79-A-195-S, and 95-A-374; MPW
permits 74-A-175-S and 95-A-373; and Monsanto permits 76-A-161S3 and
76-A-265S3.
<bullet> Add five new GPC permits into the SIP containing
SO<INF>2</INF> RACT limits for the 2010 1-hour SO<INF>2</INF> NAAQS.
The new permits are for four new stacks and one newly identified
SO<INF>2</INF> emission source. The GPC permit numbers are 17-A-298,
17-A-299, 17-A-112, 19-A-515-S1, and 18-A-136.
<bullet> Replace twenty GPC permits, two MPW permits, and one
Monsanto permit in the Iowa SIP that were relied upon in the 2016
attainment plan. Several revisions to GPC permits establish a
Collection of Air Permits (CAP) which is a type of air construction
permit issued by IDNR that combines the requirements and conditions for
multiple emission points (and thus multiple permit numbers) into one
document. Other revisions included changes to SO<INF>2</INF> RACT
limits or updates unrelated to SO<INF>2</INF>. The modified GPC permit
numbers are CAP: 80-A-149-S6, CAP: 80-A-150-S6, CAP: 85-A-031-S5, CAP:
85-A-032-S5, 91-A-068-S3, 92-A-383-S3, 92-A-385-S2, CAP: 94-A-055-S3,
CAP: 94-A-061-S3, 02-A-781-S3, 02-A-782-S3, 10-A-563-S2, 15-A-200-S1,
15-A-201-S1, 15-A-213-S2, 15-A-486-S1, 15-A-326-S1, 03-A-471-S3, 06-A-
1261-S2, and 15-A-199-S1. The modified MPW permits are 95-A-373-P4 and
80-A-191-P4, and the Monsanto permit is 82-A-092-P12.
The EPA's NPRM and supporting information contained in the docket
were made available for public comment from August 21, 2025, to
September 22, 2025. EPA received no comments on the proposal.
Therefore, we are finalizing our action as proposed.
III. Have the requirements for approval of a SIP revision been met?
The State's submission has met the public notice requirements for
SIP submissions in accordance with 40 CFR 51.102. The submission also
satisfied the completeness criteria of 40 CFR part 51, appendix V. The
State provided public notice on this SIP submission from August 20,
2021, to September 20, 2021, and held a public hearing on September 20,
2021. IDNR received and responded to written comments from two sources,
and included the comments and responses in its submission. In addition,
as explained above and in more detail in the technical support document
(TSD) which is part of this document, the revision meets the
substantive SIP requirements of the CAA, including section 110 and
implementing regulations.
IV. What action is the EPA taking?
The EPA is taking final action to approve the redesignation of the
Muscatine area from nonattainment to attainment in accordance with
Iowa's November 17, 2021 request. The criteria under CAA section
107(d)(3)(E) as specific to the 2010 SO<INF>2</INF> NAAQS have been
met. On this basis, the EPA is approving Iowa's redesignation request
for the area and changing the legal designation of the portion of
Muscatine County designated nonattainment at 40 CFR part 81 to
attainment for the 2010 1-hour SO<INF>2</INF> NAAQS.
Additionally, the EPA is approving the Muscatine, Iowa 2010
SO<INF>2</INF> 1-hour NAAQS maintenance plan into the Iowa SIP under
CAA section 175A. The maintenance plan demonstrates that the area will
continue to maintain the 2010 1-hour SO<INF>2</INF> NAAQS for at least
10 years following redesignation and includes contingency provisions to
remedy any future violations of the 2010 1-hour SO<INF>2</INF> NAAQS.
Finally, the EPA is taking final action to add new or revised
permits for Muscatine area sources into the Iowa SIP and remove certain
air construction permits from the SIP.
V. Incorporation by Reference
In this document, the EPA is finalizing regulatory text that
includes incorporation by reference. In accordance with requirements of
1 CFR 51.5, the EPA is finalizing the incorporation by reference of the
Iowa permits #17-A-298, #17-A-299, #19-A-515-S1, #18-A-136, #17-A-112,
#80-A-149-S6, #80-A-150-S6, #85-A-031-S5, #85-A-032-S5, #91-A-068-S3,
#92-A-383-S3, #92-A-385-S2, #94-A-055-S3, #94-A-061-S3, #02-A-781-S3,
#02-A-782-S3, #10-A-563-S2, #15-A-200-S1, #15-A-201-S1, #15-A-213-S2,
#15-A-486-S1, #15-A-326-S1, #03-A-471-S3, #06-A-1261-S2, #15-A-199-S1,
#95-A-373-P4, #80-A-191-P4, and #82-A-092-P12 discussed in section II.
of this preamble and as set forth below
[[Page 51556]]
in the amendments to 40 CFR part 52. The EPA has made, and will
continue to make, these materials generally available through <a href="https://www.regulations.gov">https://www.regulations.gov</a> and at the EPA Region 7 Office (please contact the
person identified in the FOR FURTHER INFORMATION CONTACT section of
this preamble for more information).
Therefore, these materials have been approved by the EPA for
inclusion in the State Implementation Plan, have been incorporated by
reference by EPA into that plan, are fully federally enforceable under
sections 110 and 113 of the CAA as of the effective date of the final
rulemaking of the EPA's approval, and will be incorporated by reference
in the next update to the SIP compilation.\3\
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\3\ 62 FR 27968, May 22, 1997.
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Also, in this document, as described in the amendments to 40 CFR
part 52 set forth below, the EPA is removing provisions of the EPA-
approved permits from the Iowa SIP, which is incorporated by reference
in accordance with the requirements of 1 CFR part 51. The EPA is
removing Iowa permits #74-A-015-S, #79-A-194-S, #79-A-195-S, #95-A-374,
#74-A-175-S, #95-A-373, #76-A-161S3, #76-A-265S3, #15-A-078, #79-A-194-
S2, #71-A-067-S4, #75-A-087-S1, #74-A-014-S1, #74-A-015-S2, #79-A-195-
S2, #80-A-149-S5, #80-A-150-S5, #85-A-031-S2, #85-A-032-S2, #91-A-068-
S2, #92-A-383-S2, #92-A-385-S1, #94-A-055-S1, #94-A-061-S1, #02-A-781-
S2, #02-A-782-S2, #10-A-563-S1, #15-A-200, #15-A-201, #15-A-202, #15-A-
209, #15-A-213, #15-A-486, #15-A-326, #03-A-471-S1, #05-A-926-S4, #06-
A-1261-S1, #11-A-338-S1, #15-A-354, #15-A-199, #95-A-373-P3, #80-A-191-
P3, and #82-A-092-P11.
VI. Statutory and Executive Order Reviews
Under the CAA, the Administrator is required to approve a SIP
submission that complies with the provisions of the CAA and applicable
Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in
reviewing SIP submissions, EPA's role is to approve state choices,
provided that they meet the criteria of the CAA. Accordingly, this
action merely approves state law as meeting Federal requirements and
does not impose additional requirements beyond those imposed by state
law. For that reason, this action:
<bullet> Is not a significant regulatory action subject to review
by the Office of Management and Budget under Executive Orders 12866 (58
FR 51735, October 4, 1993);
<bullet> Is not subject to Executive Order 14192 (90 FR 9065,
February 6, 2025) because SIP actions are exempt from review under
Executive Order 12866;
<bullet> Does not impose an information collection burden under the
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
<bullet> Is certified as not having a significant economic impact
on a substantial number of small entities under the Regulatory
Flexibility Act (5 U.S.C. 601 et seq.);
<bullet> Does not contain any unfunded mandate or significantly or
uniquely affect small governments, as described in the Unfunded
Mandates Reform Act of 1995 (Pub. L. 104-4);
<bullet> Does not have federalism implications as specified in
Executive Order 13132 (64 FR 43255, August 10, 1999);
<bullet> Is not subject to Executive Order 13045 (62 FR 19885,
April 23, 1997) because it approves a state program;
<bullet> Is not a significant regulatory action subject to
Executive Order 13211 (66 FR 28355, May 22, 2001); and
<bullet> Is not subject to requirements of section 12(d) of the
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272
note) because application of those requirements would be inconsistent
with the CAA.
In addition, the SIP is not approved to apply on any Indian
reservation land or in any other area where EPA or an Indian Tribe has
demonstrated that a Tribe has jurisdiction. In those areas of Indian
country, the rule does not have Tribal implications and will not impose
substantial direct costs on Tribal governments or preempt Tribal law as
specified by Executive Order 13175 (65 FR 67249, November 9, 2000).
This action is subject to the Congressional Review Act (CRA), and
EPA will submit a rule report to each House of the Congress and to the
Comptroller General of the United States. This action is not a ``major
rule'' as defined by 5 U.S.C. 804(2).
Under section 307(b)(1) of the CAA, petitions for judicial review
of this action must be filed in the United States Court of Appeals for
the appropriate circuit by January 20, 2026. Filing a petition for
reconsideration by the Administrator of this final rule does not affect
the finality of this action for the purposes of judicial review nor
does it extend the time within which a petition for judicial review may
be filed, and shall not postpone the effectiveness of such rule or
action. This action may not be challenged later in proceedings to
enforce its requirements (see section 307(b)(2)).
List of Subjects
40 CFR Part 52
Environmental protection, Air pollution control, Incorporation by
reference, Maintenance plan, Redesignation, Sulfur oxides.
40 CFR Part 81
Environmental protection, Air pollution control, Designations,
Intergovernmental relations, Redesignation, Reporting and recordkeeping
requirements, Sulfur oxides.
Dated: October 23, 2025.
James Macy,
Regional Administrator, Region 7.
For the reasons stated in the preamble, the EPA amends 40 CFR parts
52 and 81 as set forth below:
PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
0
1. The authority citation for part 52 continues to read as follows:
Authority: 42 U.S.C. 7401 et seq.
Subpart Q--Iowa
0
2. In Sec. 52.820:
0
a. The table in paragraph (d) is amended by:
0
i. Revising the entries ``(113),'' ``(114),'' ``(115),'' ``(116),''
``(118),'' ``(122),'' ``(123),'' ``(124),'' ``(125),'' ``(129),''
``(131),'' ``(132),'' ``(133),'' ``(134),'' ``(135),'' ``(136),''
``(138),'' ``(139),'' ``(140),'' ``(153),'' ``(156),'' ``(157),''
``(158),'' ``(160),'' ``(163),'' ``(166),'' ``(167),'' and ``(168)'';
and
0
ii. Removing and reserving entries ``(3),'' ``(4),'' ``(5),'' ``(6),''
``(7),'' ``(8),'' ``(9),'' ``(10),'' ``(119),'' ``(121),'' ``(141),''
``(148),'' ``(159),'' ``(161),'' and ``(162)''.
0
b. The table in paragraph (e) is amended by adding the entry ``(57)''
at the end of the table.
The revisions and addition read as follows:
Sec. 52.820 Identification of plan.
* * * * *
(d) * * *
[[Page 51557]]
EPA-Approved Iowa Source-Specific Orders/Permits
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State effective
Name of source Order/permit No. date EPA approval date Explanation
----------------------------------------------------------------------------------------------------------------
* * * * * * *
(3) Reserved
(4) Reserved
(5) Reserved
(6) Reserved
(7) Reserved
(8) Reserved
(9) Reserved
(10) Reserved
* * * * * * *
(113) Grain Processing 17-A-298 4/12/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(114) Grain Processing 17-A-299 4/12/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(115) Grain Processing 19-A-515-S1 12/22/2020 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(116) Grain Processing 18-A-136 5/30/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
* * * * * * *
(118) Grain Processing 17-A-112 5/2/2017 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(119) Reserved
* * * * * * *
(121) Reserved
(122) Grain Processing 80-A-149-S6 2/21/2017 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(123) Grain Processing 80-A-150-S6 2/21/2017 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(124) Grain Processing 85-A-031-S5 5/19/2020 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(125) Grain Processing 85-A-032-S5 5/19/2020 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
* * * * * * *
(129) Grain Processing 91-A-068-S3 11/4/2019 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
* * * * * * *
(131) Grain Processing 92-A-383-S3 10/11/2016 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(132) Grain Processing 92-A-385-S2 10/11/2016 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
[[Page 51558]]
(133) Grain Processing 94-A-055-S3 5/13/2021 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(134) Grain Processing 94-A-061-S3 5/13/2021 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(135) Grain Processing 02-A-781-S3 2/8/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(136) Grain Processing 02-A-782-S3 2/8/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
* * * * * * *
(138) Grain Processing 10-A-563-S2 7/25/2017 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(139) Grain Processing 15-A-200-S1 4/12/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(140) Grain Processing 15-A-201-S1 4/12/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(141) Reserved
* * * * * * *
(148) Reserved
* * * * * * *
(153) Grain Processing 15-A-213-S2 12/22/2020 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
* * * * * * *
(156) Grain Processing 15-A-486-S1 11/4/2019 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(157) Grain Processing 15-A-326-S1 3/4/2020 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(158) Grain Processing 03-A-471-S3 5/30/2018 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(159) Reserved
(160) Grain Processing 06-A-1261-S2 12/22/2020 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(161) Reserved
(162) Reserved
(163) Grain Processing 15-A-199-S1 1/11/2021 11/18/2025, 90 FR 2010 1-hour SO2
Corporation. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
* * * * * * *
(166) Muscatine Power and 95-A-373-P4 6/1/2016 11/18/2025, 90 FR 2010 1-hour SO2
Water. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
[[Page 51559]]
(167) Muscatine Power and 80-A-191-P4 6/1/2016 11/18/2025, 90 FR 2010 1-hour SO2
Water. [insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
(168) Monsanto............... 82-A-092-P12 11/1/2016 11/18/2025, 90 FR 2010 1-hour SO2
[insert Federal NAAQS Attainment
Register page where Plan; EPA-R07-OAR-
the document begins]. 2025-0818; FRL-
12901-02-R7.
* * * * * * *
----------------------------------------------------------------------------------------------------------------
(e) * * *
EPA-Approved Iowa Nonregulatory Provisions
--------------------------------------------------------------------------------------------------------------------------------------------------------
Applicable geographic or State submittal
Name of nonregulatory SIP provision nonattainment area date EPA Approval date Explanation
--------------------------------------------------------------------------------------------------------------------------------------------------------
* * * * * * *
(57) 2010 1-hour primary SO2 NAAQS A portion of Muscatine County. 11/17/2021 11/18/2025, 90 FR [insert EPA-R07-OAR-2025-0818; FRL-
Maintenance Plan. Federal Register page where 12901-01-R7.
the document begins].
--------------------------------------------------------------------------------------------------------------------------------------------------------
0
3. In Sec. 52.834, add paragraph (c) to read as follows:
Sec. 52.834 Control strategy: Sulfur dioxide.
* * * * *
(c) Redesignation to attainment. EPA has determined, as of November
18, 2025, that the Muscatine County 2010 SO<INF>2</INF> nonattainment
area is redesignated to attainment of the 2010 SO<INF>2</INF> 1-hour
National Ambient Air Quality Standard (NAAQS) in accordance with the
requirements of Clean Air Act (CAA) section 107(d)(3) and has approved
its maintenance plan and supplemental modeling demonstration analyses
as meeting the requirements of CAA section 175A.
PART 81--DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES
0
4. 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
5. In Sec. 81.316, the table entitled ``Iowa--2010 Sulfur Dioxide
NAAQS [Primary]'' is amended by revising the entry ``Muscatine, IA'' to
read as follows:
Sec. 81.316 Iowa.
* * * * *
Iowa--2010 Sulfur Dioxide NAAQS
[Primary]
----------------------------------------------------------------------------------------------------------------
Designation
Designated area \1\ -----------------------------------------------------
Date \2\ Type
----------------------------------------------------------------------------------------------------------------
Muscatine, IA............................................. 11/18/2025 Attainment.
Muscatine County (part)..............................
Sections 1-3, 10-15, 22-27, 34-36 of T77N, R3W
(Lake Township).
Sections 1-3, 10-15, 22-27, 34-36 of T76N, R3W
(Seventy-six Township).
T77N, R2W (Bloomington Township).............
T76N, R2W (Fruitland Township)...............
All sections except 1, 12, 13, 24, 25, 36 of
T77N, R1W (Sweetland Township).
* * * * * * *
----------------------------------------------------------------------------------------------------------------
\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.
* * * * *
[FR Doc. 2025-20197 Filed 11-17-25; 8:45 am]
BILLING CODE 6560-50-P
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</html>Indexed from Federal Register on November 18, 2025.
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