An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Regulations for Emissions from Vehicles and Engines

EPA Presentation Regarding the Advanced Light-Duty Powertrain and Hybrid Analysis (ALPHA) Tool

This presentation highlights EPA's benchmarking and modeling activities relating to light duty greenhouse gas (GHG) emissions. 

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Regulations for Emissions from Vehicles and Engines Home