The Carl Moyer Program provides monetary grants to private companies and public agencies to clean up their heavy-duty engines beyond that required by law or regulation, through repowering, replacing or retrofitting their engines, vehicles or equipment. Moyer grants also fund infrastructure projects to support California’s transformation toward zero and near-zero technologies.

What Types of Projects Qualify for Carl Moyer Grants?

Projects that reduce surplus emissions from heavy-duty on and off-road equipment qualify. This includes on-road trucks over 14,000 gross vehicle weight such as heavy-duty trucks and buses, school buses, transit fleet vehicles, drayage trucks, solid waste collection vehicles, public agency/utility vehicles, emergency vehicles and off-road equipment such as construction and farm equipment, locomotives, stationary agricultural equipment, forklifts, and other agricultural sources and airport ground support equipment. Infrastructure projects such as battery charging stations, alternative fueling stations, and stationary agricultural pump electrification are also eligible for Moyer grants.

Heavy duty diesel vehicles subject to a compliance deadline (as specified in CARB’s Truck and Bus Regulation) within one year of application and off–road diesel equipment subject to a compliance deadline within three years (as specified within CARB’s Off-Road diesel regulation) are not eligible to apply.

Available Funds and Funding Caps

Total amount of funds currently budgeted is approximately $1.2 million. In the initial solicitation for projects, each project category, as listed below, is assigned a funding cap to allow opportunities for all project types to compete for funds. Should there be any remaining funds after the initial solicitation, the District will determine how to continue to make funds available, whether through an open first come first serve process or through another competitive solicitation. Either way, all eligible and cost effective projects which do not receive funding at time of application, due to limited funds, may be added to a waitlist until future funds become available.

The District continues to seek and apply for additional funding sources, in addition to the initial $1.2 million budgeted. As these funds become available for projects submitted through the Moyer Program, they will be prioritized to Moyer projects which were previously submitted and placed on a waitlist, by the District.

Grant Program Notification Schedule

Within 30 days of Application submittal, an email will be sent to the project applicant identifying receipt of project application and whether the application is complete or incomplete.

Within 45 days of a solicitation period closing, projects received will be evaluated, ranked and approved for tentative funding and applicants will receive notification of award status.

For more information and to apply, select from one of the application categories below:

The “wait list in effect” status means that the District is accepting applications but currently does not have any funds to apply to the project.  All projects approved for tentative funding during this time will be added to the wait list and funded if funds become available.

The “open” status means funds are currently available for that project category.

The Alternative Fuel Infrastructure Project Category is subject to an additional competitive bid process, as required by the Carl Moyer Guidelines. Therefore, this category will always be subject to a competitive bid process and not first come first serve.

Project Application Category


Heavy Duty On and Off-Road Equipment Replacement, Repower, and Retrofit

  • Fleets must be in full compliance with State regulations prior to applying


School Bus Replacement

  • Fleets must be in full compliance with State regulations prior to applying


Agricultural Portable & Stationary Engine Repower & Infrastructure

  • Only Tier 3 diesel engines eligible to apply
  • Engines must be in full compliance with State regulations prior to applying


Alternative Fuel Infrastructure

  • Eligible project types include battery charging stations, natural gas, and hydrogen fueling
  • Infrastructure projects will be subject to a competitive bid process
  • Individual and Residential projects not eligible for funds


Project Category Funding Caps

The funding caps listed below identify the amount of funds that have been currently allocated to each project category. Funding caps will be subject to change as additional funds become available. Any changes will be reflected in the table below.

Project Category

Funding Cap

Heavy Duty and Off-Road Projects

Up to 70% of Program Funding

School Bus Replacement and Repower Projects

Up to 10% of Program Funding

Ag Pump Repower and Electrification Projects

Up to 5% of Program Funding

Alternative Fuel Infrastructure Projects

Up to 15% of Program Funding

 Links to useful information: