Regulations for Emissions from Vehicles and Engines

Regulations for Greenhouse Gas Emissions from Passenger Cars and Trucks

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The national program for greenhouse gas emissions (GHG) and fuel economy standards for light-duty vehicles (passenger cars and trucks) was developed jointly by EPA and the National Highway Traffic Safety Administration (NHTSA).

The standards were established in two phases:
  • Phase 1 - Model years 2012 - 2016; and
  • Phase 2 - Model years 2017 - 2025.
Together the final standards are projected to:
  • Result in an average industry fleetwide level of 163 grams/mile of carbon dioxide (CO2) in model year 2025, which is equivalent to 54.5 miles per gallon (mpg) (if achieved exclusively through fuel economy improvements);
  • Cut 6 billion metric tons of GHG over the lifetimes of the vehicles sold in model years 2012-2025; 
  • Save families more than $1.7 trillion in fuel costs; and
  • Reduce America’s dependence on oil by more than 2 million barrels per day in 2025.
Learn more:

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EPA Midterm Evaluation of GHG Emissions Standards

As part of the 2017-2025 standards rulemaking, EPA made a regulatory commitment to conduct a Midterm Evaluation of the longer-term standards for model years 2022-2025, in coordination with NHTSA and the California Air Resources Board.

Learn more about the midterm evaluation process:

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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:

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Searchable/Sortable Table Instructions

The table default is to show all table entries. To change the number of entries shown, click the drop-down arrow next to the word "All".


The column with the blue arrow indicates which column your table is sorted by.
For example, if you saw the image below, the table would be sorted in ascending order on the "Technology Type" column.

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To change which column your table is sorted by, click an arrow in another column.
For example, if you wanted to sort by descending order on the "Applicable for" column in the image below, you would click the down arrow.

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You can filter the table using the Search box. Start typing in the search box and your table will automatically display only rows that contain what you entered in the search box.

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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.


For help on using the table:
Click the regulation titles for additional information, including:
  • Regulations;
  • Regulatory impact analyses;
  • Comment summaries;
  • Rule histories; and
  • Fact sheets.
Regulation Title Regulation Date
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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