The CMRR has a sustainability program to reduce locomotive emissions.

In March 2024 the CMRR started using 100% Biodiesel in its locomotives to reduce emissions.

In March 2024, the New York State Department of Transportation awarded the CMRR a New York State Passenger and Freight Rail grant for $2,300,000  for a Clean Diesel Upgrade to at least EPA Tier 3 locomotive for one of its existing locomotives.