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Proposed Rule

You may be interested in this older document that published on 01/30/2026 with action 'Proposed rule; reconsideration of final rule.' View Document

Interstate Transport Plan Review for the 2015 Ozone NAAQS

A Proposed Rule by the Environmental Protection Agency on 03/03/2026

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3. Document Details Published Content - Document Details Agency Environmental Protection Agency Agency/Docket Numbers EPA-HQ-OAR-2025-0192 FRL-12716-03-OAR CFR 40 CFR 52 Document Citation 91 FR 10360 Document Number 2026-04151 Document Type Proposed Rule Page 10360 (1 page) Publication Date 03/03/2026 Published Content - Document Details

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• Document Details Published Content - Document Details Agency Environmental Protection Agency Agency/Docket Numbers EPA-HQ-OAR-2025-0192 FRL-12716-03-OAR CFR 40 CFR 52 Document Citation 91 FR 10360 Document Number 2026-04151 Document Type Proposed Rule Page 10360 (1 page) Publication Date 03/03/2026 Published Content - Document Details
• Document Dates Published Content - Document Dates Comments Close 03/23/2026 Effective Date 2026-01-30 Dates Text The comment period for the proposed rule published on January 30, 2026, at 91 FR 4026 is extended. Comments must be received on or before March 23, 2026. Published Content - Document Dates

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| EPA-HQ-OAR-2025-0192
(2 Documents) | | | |
| --- | | | |
| Date | | Action | Title |
| | 2026-03-03 | Proposed rule; extension of comment period. | Interstate Transport Plan Review for the 2015 Ozone NAAQS |
| | 2026-01-30 | Proposed rule; reconsideration of final rule. | Interstate Transport Plan Review for the 2015 Ozone NAAQS |

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Interstate Transport Plan Review for the 2015 Ozone NAAQS

Docket ID EPA-HQ-OAR-2025-0192 Supporting Documents 2019 NEI TSD: Point Data Category 2016v3 projection factors 2023 Memo to Docket on Transport Edison Electric Meeting 01-15-2026 O3 Design Values and Contributions 2016v2 Modeling AQ Modeling TSD Proposed FIP CAMx 2016v3 MDA8 O3 Model Performance Stats by Site Nevada Cement Co. v. EPA No. 23-682 (9th Cir. July 3, 2023) - Stay Order NMED 2015 Ozone Transport Certification Adoption Order Hearing Transcript Texas et al. v. EPA No. 23-60069 (5th Cir. 2025) - Opinion Nevada Cement Co. v. EPA No. 23-682 (9th Cir. Dec. 17, 2024) - Stay Lift See all 72 supporting documents Enhanced Content - Regulations.gov Data

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Environmental Protection Agency

1. 40 CFR Part 52
2. [EPA-HQ-OAR-2025-0192; FRL-12716-03-OAR]

AGENCY:

Environmental Protection Agency (EPA).

ACTION:

Proposed rule; extension of comment period.

SUMMARY:

The Environmental Protection Agency (EPA) is extending the comment period for the proposed “Interstate Transport Plan Review for the 2015 Ozone NAAQS,” published in the Federal Register on January 30, 2026. The current comment period for the proposed rule is set to end on March 2, 2026. The EPA has received numerous requests to extend the comment period. The EPA is extending the comment period for the proposed action to March 23, 2026.

DATES:

The comment period for the proposed rule published on January 30, 2026, at 91 FR 4026 is extended. Comments must be received on or before March 23, 2026.

ADDRESSES:

You may send comments, identified by Docket ID No. EPA-HQ-OAR-2025-0192, by any of the following methods:

• Federal eRulemaking Portal: www.regulations.gov (our preferred method). Follow the online instructions for submitting comments.
• Email: a-and-r-docket@epa.gov. Include Docket ID No. EPA-HQ-OAR-2025-0192 in the subject line of the message.
• Mail: U.S. Environmental Protection Agency, EPA Docket Center, Docket ID No. EPA-HQ-OAR-2025-0192, Mail Code 28221T, 1200 Pennsylvania Avenue NW, Washington, DC 20460.
• Hand Delivery or Courier: EPA Docket Center, WJC West Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20004. The Docket Center's hours of operation are 8:30 a.m.-4:30 p.m., Monday-Friday (except Federal holidays). Instructions: All submissions received must include the Docket ID No. for this proposed rulemaking. Comments received may be posted without change to www.regulations.gov, including personal information provided.

FOR FURTHER INFORMATION CONTACT:

For information about this proposed rule, contact Gwyndolyn Sofka, Air Quality Planning Division, Office of State Air Partnerships (C539-04), Environmental Protection Agency, 109 TW Alexander Drive, Research Triangle Park, NC 27711; telephone number (919) 541-5121; email address: sofka.gwyndolyn@epa.gov or Thomas Uher, Air Quality Planning Division, Office of State Air Partnerships (C539-04), Environmental Protection Agency, 109 TW Alexander Drive, Research Triangle Park, NC 27711; telephone number: (919) 541-5534; email address: uher.thomas@epa.gov.

SUPPLEMENTARY INFORMATION:

On Friday, January 30, 2026, the EPA published the Interstate Transport Plan Review for the 2015 Ozone NAAQS proposed rule in the Federal Register. The comment period for the proposed rule was for 30 days, ending on March 2, 2026. The EPA received numerous comments requesting that the Agency extend the comment period for the proposed rule. To ensure the public has sufficient time to review the proposed action, the EPA is extending the comment period by 21 days, ending on March 23, 2026.

Authority: The statutory authority for this action is provided by the Clean Air Act (CAA) as amended (42 U.S.C. 7401 et seq.). CAA section 110(a)(2)(D)(i)(I), also known as the “good neighbor” or “interstate transport” provision, provides the primary basis for the proposed action, for which we are extending the comment period an additional 21 days.

Dated: February 26, 2026.

Scott Mathias,

Director, Office of State Air Partnerships.

[FR Doc. 2026-04151 Filed 3-2-26; 8:45 am]

BILLING CODE 6560-50-P

Published Document: 2026-04151 (91 FR 10360)