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Regulations for Emissions from Vehicles and Engines
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Regulations for Greenhouse Gas Emissions from Passenger Cars and Trucks

Related Topics
  • Regulations for emissions from onroad vehicles & engines
  • 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 April 12, 2023, EPA announced 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 reducing climate pollution, to improving public health, to saving drivers money through reduced fuel and maintenance costs. The proposed standards would phase in over model years 2027 through 2032.

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

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List of Related Regulations

Below is a list of all regulations related to GHG emissions from light-duty passenger cars and trucks.

Help
For help on using the table:
  • View Table Instructions
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)
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 Regulations Direct Final Rule with 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
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Last updated on April 12, 2023
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