Public Hearing and Public Comments: Revision of Tier 4 Criteria Pollutant Standards, Part 1: Amendments to Phase-In Schedule for Light-Duty and Medium-Duty Vehicles
Summary
To view documents supporting this proposed rulemaking as well as comments submitted, please visit regulations.gov and access the rule under Docket ID No. EPA–HQ–OAR–2025–3297 or see the Proposed Rule page.
Public Comment Opportunity
EPA invites public comment on the proposed rule, Revision of Tier 4 Criteria Pollutant Standards, Part 1: Amendments to Phase-In Schedule for Light-Duty and Medium-Duty Vehicles which was published in the Federal Register on May 18, 2026 under docket ID number [EPA–HQ–OAR–2025–3297; FRL–13030–02–OAR].
Public Hearing
EPA will hold a public hearing on this proposed rule. Public Hearing Details:
- Wednesday, June 3 (9:00am-9:00pm EDT) and Thursday, June 4 (10:00am-10:00pm EDT).
- Email to request the registration form or ask questions about the hearing.
- Pre-registration ends on May 27th (recommended for those requesting special accommodations), but the registration form will be open through June 2nd.
- Will be hosted on Zoom.
Availability of Comments
All comments received will be included in the public docket without change and will be made available for public inspection at Federal eRulemaking Portal, including any personally identifiable information provided. Do not submit confidential business information or other sensitive materials unless clearly marked and submitted in accordance with applicable EPA procedures.