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.

Verified Technologies for SmartWay and Clean Diesel

Locomotive Technology

EPA has been working with the nation’s major railroads to implement voluntary efforts to reduce emissions beyond the mandated reductions. 

""