Missouri Air Plan Approval for Sulfur Emissions from Stationary Boilers

Legal Status This site displays a prototype of a “Web 2.0” version of the daily
Federal Register. It is not an official legal edition of the Federal
Register, and does not replace the official print version or the official
electronic version on GPO’s govinfo.gov.

The documents posted on this site are XML renditions of published Federal
Register documents. Each document posted on the site includes a link to the
corresponding official PDF file on govinfo.gov. This prototype edition of the
daily Federal Register on FederalRegister.gov will remain an unofficial
informational resource until the Administrative Committee of the Federal
Register (ACFR) issues a regulation granting it official legal status.
For complete information about, and access to, our official publications
and services, go to About the Federal Register on NARA's archives.gov.

The OFR/GPO partnership is committed to presenting accurate and reliable
regulatory information on FederalRegister.gov with the objective of
establishing the XML-based Federal Register as an ACFR-sanctioned
publication in the future. While every effort has been made to ensure that
the material on FederalRegister.gov is accurately displayed, consistent with
the official SGML-based PDF version on govinfo.gov, those relying on it for
legal research should verify their results against an official edition of
the Federal Register. Until the ACFR grants it official status, the XML
rendition of the daily Federal Register on FederalRegister.gov does not
provide legal notice to the public or judicial notice to the courts.

Legal Status

Proposed Rule

Air Plan Approval; Missouri; Revisions to Existing Rule 10 CSR 10-5.570; Control of Sulfur Emissions From Stationary Boilers

A Proposed Rule by the Environmental Protection Agency on 04/09/2026

• 1.

1.
This document has a comment period that ends in 32 days.
(05/11/2026) View Comment Instructions

Thank you for taking the time to create a comment. Your input is important.

Once you have filled in the required fields below you can preview and/or submit your comment to the Environmental Protection Agency for review. All comments are considered public and will be posted online once the Environmental Protection Agency has reviewed them.

You can view alternative ways to comment or you may also comment via Regulations.gov at /documents/2026/04/09/2026-06831/air-plan-approval-missouri-revisions-to-existing-rule-10-csr-10-5570-control-of-sulfur-emissions.

It appears that you have attempted to comment on this document before
so we've restored your progress.
Start over.
1.
2. Comment * What is your comment about? Upload File(s) Note: You can attach your comment as a file and/or attach supporting
documents to your comment. Attachment Requirements.

Email this will NOT be posted on regulations.gov

Opt to receive email confirmation of submission and tracking number? Tell us about yourself! I am... * An Individual An Organization Anonymous First Name * Last Name * City Region State Alabama Alaska American Samoa Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Guam Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virgin Islands Virginia Washington West Virginia Wisconsin Wyoming Zip Country Afghanistan Åland Islands Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia, Plurinational State of Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo, the Democratic Republic of the Cook Islands Costa Rica Côte d'Ivoire Croatia Cuba Curaçao Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Holy See (Vatican City State) Honduras Hong Kong Hungary Iceland India Indonesia Iran, Islamic Republic of Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Korea, Democratic People's Republic of Korea, Republic of Kuwait Kyrgyzstan Lao People's Democratic Republic Latvia Lebanon Lesotho Liberia Libya Liechtenstein Lithuania Luxembourg Macao Macedonia, the Former Yugoslav Republic of Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique Mauritania Mauritius Mayotte Mexico Micronesia, Federated States of Moldova, Republic of Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island Northern Mariana Islands Norway Oman Pakistan Palau Palestine, State of Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Puerto Rico Qatar Réunion Romania Russian Federation Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Sint Maarten (Dutch part) Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Swaziland Sweden Switzerland Syrian Arab Republic Taiwan, Province of China Tajikistan Tanzania, United Republic of Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States United States Minor Outlying Islands Uruguay Uzbekistan Vanuatu Venezuela, Bolivarian Republic of Viet Nam Virgin Islands, British Virgin Islands, U.S. Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe Phone Organization Type * Company Organization Federal State Local Tribal Regional Foreign U.S. House of Representatives U.S. Senate Organization Name * You are filing a document into an official docket. Any personal
information included in your comment text and/or uploaded
attachment(s) may be publicly viewable on the web. I read and understand the statement above.

2. Preview Comment Please review the Regulations.gov privacy notice and user notice.
3. Document Details Published Content - Document Details Agency Environmental Protection Agency Agency/Docket Numbers EPA-R07-OAR-2026-1785 FRL-13279-01-R7 CFR 40 CFR 52 Document Citation 91 FR 17913 Document Number 2026-06831 Document Type Proposed Rule Pages 17913-17914 (2 pages) Publication Date 04/09/2026 Published Content - Document Details

• PDF Official Content
  • View printed version (PDF) Official Content
• Document Details Published Content - Document Details Agency Environmental Protection Agency Agency/Docket Numbers EPA-R07-OAR-2026-1785 FRL-13279-01-R7 CFR 40 CFR 52 Document Citation 91 FR 17913 Document Number 2026-06831 Document Type Proposed Rule Pages 17913-17914 (2 pages) Publication Date 04/09/2026 Published Content - Document Details
• Document Dates Published Content - Document Dates Comments Close 05/11/2026 Dates Text Comments must be received by May 11, 2026. Published Content - Document Dates

• Table of Contents Enhanced Content - Table of Contents This table of contents is a navigational tool, processed from the
  headings within the legal text of Federal Register documents.
  This repetition of headings to form internal navigation links
  has no substantive legal effect.

  • AGENCY:
  • ACTION:
  • SUMMARY:
  • DATES:
  • ADDRESSES:
  • FOR FURTHER INFORMATION CONTACT:
  • SUPPLEMENTARY INFORMATION:
  • List of Subjects in 40 CFR Part 52 Enhanced Content - Table of Contents

• Related Documents Enhanced Content - Related Documents FederalRegister.gov uses the agency dockets published with the document to display related documents.

| EPA-R07-OAR-2026-1785
(2 Documents) | | | |
| --- | | | |
| Date | | Action | Title |
| | 2026-04-09 | Proposed rule. | Air Plan Approval; Missouri; Revisions to Existing Rule 10 CSR 10-5.570; Control of Sulfur Emissions From Stationary Boilers |
| | 2026-04-09 | Direct final rule. | Air Plan Approval; Missouri; Revisions to Existing Rule 10 CSR 10-5.570; Control of Sulfur Emissions From Stationary Boilers |

Enhanced Content - Related Documents

• Public Comments Enhanced Content - Public Comments Comments are being accepted - View Comment Instructions.

Enhanced Content - Public Comments
- Regulations.gov Data Enhanced Content - Regulations.gov Data Additional information is not currently available for this document.

Enhanced Content - Regulations.gov Data

- Sharing Enhanced Content - Sharing Shorter Document URL https://www.federalregister.gov/d/2026-06831 Email Email this document to a friend Enhanced Content - Sharing

• Print Enhanced Content - Print
  • Print this document Enhanced Content - Print
• Other Formats Enhanced Content - Other Formats This document is also available in the following formats:

JSON Normalized attributes and metadata XML Original full text XML MODS Government Publishing Office metadata More information and documentation can be found in our developer tools pages.

Enhanced Content - Other Formats
- Public Inspection Public Inspection This PDF is FR Doc. 2026-06831 as it appeared on Public Inspection on
04/08/2026 at 8:45 am.

It was viewed
14
times while on Public Inspection.

If you are using public inspection listings for legal research, you
should verify the contents of the documents against a final, official
edition of the Federal Register. Only official editions of the
Federal Register provide legal notice of publication to the public and judicial notice
to the courts under 44 U.S.C. 1503 & 1507. Learn more here.

Public Inspection
Published Document: 2026-06831 (91 FR 17913) This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

Document Headings Document headings vary by document type but may contain
the following:

1. the agency or agencies that issued and signed a document
2. the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to
3. the agency docket number / agency internal file number
4. the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details.

Environmental Protection Agency

1. 40 CFR Part 52
2. [EPA-R07-OAR-2026-1785; FRL-13279-01-R7]

AGENCY:

Environmental Protection Agency (EPA).

ACTION:

Proposed rule.

( printed page 17914)

SUMMARY:

The Environmental Protection Agency (EPA) is proposing to approve Missouri State Implementation Plan (SIP) revisions submitted on November 10, 2020, by the Missouri Department of Natural Resources (MoDNR). This proposed action will amend the SIP to address administrative changes to the State rule in the Missouri Code of State Regulations (CSR). Revisions include removal of references to a revoked state regulation and other minor administrative changes. The EPA is proposing to approve these changes because they are consistent with the Clean Air Act (CAA) and applicable EPA regulations. In the “Rules and Regulations” section of this Federal Register, we are approving the State's SIP revisions as a direct final rule without a prior proposed rule. If we receive no adverse comment, we will not take further action on this proposed rule.

DATES:

Comments must be received by May 11, 2026.

ADDRESSES:

Submit your comments, identified by Docket ID No. EPA-R07-OAR-2026-1785 to https://www.regulations.gov. Follow the online instructions for submitting comments. Once submitted, comments cannot be edited or removed from Regulations.gov. The EPA may publish any comment received to its public docket. Do not submit electronically any information you consider to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Multimedia submissions (audio, video, etc.) must be accompanied by a written comment. The written comment is considered the official comment and should include discussion of all points you wish to make. The EPA generally will not consider comments or comment contents located outside of the primary submission (i.e., on the web, cloud, or other file sharing system). For additional submission methods, the full EPA public comment policy, information about CBI or multimedia submissions, and general guidance on making effective comments, please visit https://www.epa.gov/​dockets/​commenting-epa-dockets.

FOR FURTHER INFORMATION CONTACT:

Ashley Eichman, Environmental Protection Agency, Region 7 Office, Air and Radiation Division, 11201 Renner Boulevard, Lenexa, Kansas 66219; telephone number: (913) 551-7762; email address: eichman.ashley@epa.gov.

SUPPLEMENTARY INFORMATION:

This document proposes to take action on changes to the State rule at Title 10, Division 10 of the Code of State Regulations (CSR) 5.570, Control of Sulfur Emissions From Stationary Boilers, as revisions to the SIP previously approved at 40 CFR 52.1320(c). Revisions include removal of references to a revoked State regulation and other minor administrative changes. We have published a direct final rule approving the State's SIP revision in the “Rules and Regulations” section of this Federal Register, because we view this as a noncontroversial action and anticipate no relevant adverse comment. We have explained our reasons for this action in the preamble to the direct final rule. If we receive no adverse comment, we will not take further action on this proposed rule. If we receive adverse comment, we will withdraw the direct final rule and it will not take effect. We would address all public comments in any subsequent final rule based on this proposed rule. We do not intend to institute a second comment period on this action. Any parties interested in commenting must do so at this time. For further information, please see the information provided in the ADDRESSES section of this document.

List of Subjects in 40 CFR Part 52

• Environmental protection
• Air pollution control
• Carbon monoxide
• Incorporation by reference
• Intergovernmental relations
• Lead
• Nitrogen dioxide
• Ozone
• Particulate matter
• Reporting and recordkeeping requirements
• Sulfur oxides
• Volatile organic compounds Dated: March 31, 2026.

James Macy,

Regional Administrator, Region 7.

[FR Doc. 2026-06831 Filed 4-8-26; 8:45 am]

BILLING CODE 6560-50-P

Published Document: 2026-06831 (91 FR 17913)