School Bus Replacement Program supports Wyoming school bus operators with purchases of new diesel or alternative-fueled buses to replace older diesel vehicles through emissions-reduction funding.
Municipality and County Diesel Equipment Replacement Program supports Wyoming city and county governments in replacing diesel trucks, transit buses, or their engines to reduce emissions across the state.
The Oklahoma Clean Diesel (DERA) Program funds the replacement of old diesel school buses with cleaner alternatives to reduce emissions and improve air quality in Oklahoma.
Clean Diesel Grant Programs support public and private fleets in Wisconsin with diesel-emissions reduction projects, while sharing a separate EPA opportunity to upgrade and replace aging diesel equipment.
Diesel Reduction Grants support Washington public and private fleets replacing or repowering diesel vehicles and equipment with zero-emission alternatives to reduce toxic exhaust and greenhouse gas emissions.
The EPA offers competitive 2026 grants to eligible entities to retrofit, replace, or retire older diesel engines, vehicles, and equipment.