An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Regulations for Emissions from Vehicles and Engines
Contact Us
Related Topics
- Transportation, air pollution, and climate change
- Light-duty models for GHG emissions
- Presidential Announcements and Industry Letters of Support related to GHG Emissions
On this page:
- Overview
- Annual reports
- List of related regulations
Overview
On March 20, 2024, EPA announced new, more protective final standards to further reduce harmful air pollutant emissions from light-duty and medium-duty vehicles starting with model year 2027. The final rule builds upon EPA’s standards for federal greenhouse gas emissions standards for passenger cars and light trucks for model years 2023 through 2026, established in 2021, 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. These standards will phase in over model years 2027 through 2032.
- Final Rule: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles
Learn more:
- Proposed Rule: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles
- Notice of Decision: Reconsideration of a Previous Withdrawal of a Waiver for California’s Advanced Clean Car Program (Light-Duty Vehicle Greenhouse Gas Emission Standards and Zero Emission Vehicle Requirements)
- Final standards to strengthen federal GHG emissions standards for passenger cars and light trucks by setting stringent requirements for emissions reductions through Model Year (MY) 2026
- Proposed Rule to Revise Existing National GHG emissions standards for passenger cars and light trucks through model year 2026
- Notice of Reconsideration of a Previous Withdrawal of a Waiver for California’s Advanced Clean Car Program (Light-Duty Vehicle Greenhouse Gas Emission Standards and Zero Emission Vehicle Requirements)
- Final Rule: Light-duty Vehicle Greenhouse Gas Program Technical Amendments
- Final Rule: The Safer Affordable Fuel Efficient (SAFE) Vehicles for Model Years 2021-2026
- Final Rule: One National Program on Federal Preemption of State Fuel Economy Standards
Annual Reports
EPA issues annual reports on vehicle manufacturers' performance in meeting the GHG emissions standards, and on light duty fuel economy and GHG emission trends since 1975.
Click the links below to read the reports:
- GHG Emission Standards: Manufacturer Performance Report
- Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends Report
List of Related Regulations
Below is a list of all regulations related to GHG emissions from light-duty passenger cars and trucks.
Click the regulation titles for additional information, including:
- Regulations;
- Regulatory impact analyses;
- Comment summaries;
- Rule histories;and
- Fact sheets.
| Regulation Title | Regulation Date (Year/Month) |
|---|---|
| Final Rule: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles | 2024/03 |
| Proposed Rule: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles | 2023/04 |
| Final Rule to Revise Existing National GHG emissions standards for passenger cars and light trucks through model year 2026 | 2021/12 |
| Proposed Rule to Revise Existing National GHG emissions standards for passenger cars and light trucks through model year 2026 | 2021/08 |
| Notice of Reconsideration of a Previous Withdrawal of a Waiver for California’s Advanced Clean Car Program (Light-Duty Vehicle Greenhouse Gas Emission Standards and Zero Emission Vehicle Requirements) | 2021/04 |
| E85 Flexible Fuel Vehicle Weighting Factor (F-factor) for Model Years 2021 and Later Vehicles | 2020/08 |
| Technical Correction to the Flex-fuel Vehicle Provisions in CAFE RegulationsDirect Final Rulewith Companion Notice of Proposed Rulemaking | 2020/07 |
| Small Volume Manufacturers Alternative GHG Standards Final Determinations | 2020/06 |
| Final Rule: The Safer Affordable Fuel Efficient (SAFE) Vehicles for Model Years 2021-2026 | 2020/04 |
| Final Rule: Light-duty Vehicle Greenhouse Gas Program Technical Amendments | 2020/04 |
| Final Rule: One National Program on Federal Preemption of State Fuel Economy Standards | 2019/09 |
| Small Volume Manufacturer Alternative GHG Standards Draft Determinations | 2019/07 |
| The Safer Affordable Fuel Efficient (SAFE) Vehicles Proposed Rule for Model Years 2021-2026 | 2018/09 |
| Proposed Rule for Technical Amendments to the Light-duty Vehicle Greenhouse Gas Program | 2018/09 |
| Midterm Evaluation of Light-duty Vehicle GHG Emissions Standards for Model Years 2022-2025 | 2018/04 |
| Final Rule for Model Year 2017 and Later Light-Duty Vehicle Greenhouse Gas Emissions and Corporate Average Fuel Economy Standards | 2012/10 |
| Final Rule for Model Year 2012 - 2016 Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards | 2010/05 |
| Endangerment and Cause or Contribute Findings for Greenhouse Gases under the Section 202(a) of the Clean Air Act | 2009/12 |
| California GHG Waiver Request | 2009/06 |
- Regulations for Emissions from Vehicles and Engines Home
- Onroad
- Nonroad
- Greenhouse Gas
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on March 20, 2024
