Proposed Rule: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles
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Rule Summary
Para información en español, haga clic aquí.
On April 27, 2023, EPA published a proposed rule for new, more ambitious proposed standards to further reduce harmful air pollutant emissions from light-duty and medium-duty vehicles starting with model year 2027. The proposal builds upon EPA’s final standards for federal greenhouse gas emissions standards for passenger cars and light trucks for model years 2023 through 2026 and leverages advances in clean car technology to unlock benefits to Americans ranging from improving public health through reducing smog- and soot-forming pollution from vehicles, to reducing climate pollution, to saving drivers money through reduced fuel and maintenance costs. The proposed standards would phase in over model years 2027 through 2032. EPA sought input on this effort from the public, including all stakeholders.
NOTE: This rule was finalized on March 20, 2024.
The docket for this NPRM is available at regulations.gov Docket ID # EPA-HQ-OAR-2022-0829.
- Proposed Rule: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles (pdf) (4.9 MB, published May 5, 2023)
Public Hearing Testimony Transcript; Written Comments
EPA held a virtual public hearing on May 9-11, 2023, for interested persons and entities to provide an opportunity for oral presentation of data, views, or arguments on the proposed rule. Transcripts of the virtual hearings are available here:
- Virtual Hearing Transcript Day 1 (pdf)
- Virtual Hearing Transcript Day 2 (pdf)
- Virtual Hearing Transcript Day 3 (pdf)
The comment period for this proposal closed on July 5, 2023. To view documents supporting the proposed rulemaking as well as comments submitted, please visit regulations.gov and access the rule under Docket ID No. EPA-HQ-OAR-2022-0829.
Additional Resources
- Fact Sheet: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles (pdf) (131 KB, April 2023, EPA-420-F-23-009)
- Normas de emisiones multi- contaminantes para vehículos livianos y medianos modelos del año 2027 y posteriores (pdf) (131 KB, April 2023, EPA-420-F-23-010)
- Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles - Draft Regulatory Impact Analysis (pdf) (12.8 MB, April 2023, EPA-420-D-23-003)
- Illustrative Air Quality Analysis for the Light and Medium Duty Vehicle Multipollutant Proposed Rule - Technical Support Document (TSD) (pdf) (17.6 MB, April 2023, EPA-420-D-23-002)
- EPA’s OMEGA model runs and files supporting the proposed rule's benefit-cost and effects analysis
- Redline Version of EPA’s Proposed Regulatory Amendments: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles (pdf)