Clean Air Grant Program

The District's Clean Air Grant (CAG) Program provides monetary grants to private companies and public agencies to clean up their heavy-duty engines beyond that which is required by law or regulation through repowering, replacing, or retrofitting their engines, vehicles, or equipment. Grants may also fund infrastructure projects to support California’s transformation toward zero and near-zero emission technologies. A portion of Clean Air Grant Program funds is reserved for projects located within or benefitting low-income communities.

Types of Projects that Qualify for Clean Air Grants

Infrastructure projects that enable emission reductions and projects that reduce surplus emissions from heavy-duty on-road and off-road equipment qualify, including on-road trucks over 14,000 gross vehicle weight. Examples of potential projects include:

  1. Off-Road Equipment
  2. On-Road Vehicles
  3. Infrastructure
  • Construction and Farm Equipment
  • Forklifts
  • Locomotives
  • Stationary Agricultural Equipment
  • Other Agricultural Sources

Heavy-duty diesel vehicles subject to a compliance deadline within two years and off-road diesel equipment subject to a compliance deadline within four years are not eligible to apply.

Available 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-served basis or through another competitive solicitation. Either way, all eligible and cost-effective projects which do not receive funding at the time of application due to limited funds may be added to a waitlist until future funds become available.

Funding for the District's Clean Air Grant Program comes from a variety of federal, state and local sources. A large portion of the available funding comes from the California Air Resource Board's Carl Moyer Program and Community Air Protection Incentives Program. The District follows the Carl Moyer and Community Air Protection Incentives Guidelines when reviewing and ranking project applications. The District continues to seek and apply for additional funding sources. As these funds become available for projects submitted through the Clean Air Grant Program, they will be prioritized to projects which were previously submitted and placed on a waitlist by the District.

Learn more about the District's Community Air Protection Incentives Program.

Grant Program Notification Schedule

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.

Application Categories

For more information and to apply, select from one of the below application categories. Applications may be emailed to our incentives team (, or mailed or delivered in-person to the Placer County APCD at 110 Maple Street, Auburn, CA 95603 by 5pm on the closing date. Postmarks and faxes will not be considered.

Publicly accessible projects in the Alternative Fuel Infrastructure Project Category are subject to an additional Competitive Bid Process, as defined by the Carl Moyer Guidelines. Therefore, these project applications will always be subject to a competitive process and not funded on a first-come, first-served basis.

Project Application Category
Application Submittal Period
Agricultural Portable and Stationary Engine Repower and Infrastructure Only Tier 3 diesel engines are eligible to apply. Engines must be in full compliance with State regulations prior to applying.
April 1, 2024 - May 31, 2024
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 April 1, 2024 - May 31, 2024
Heavy-Duty On- and Off-Road Equipment Replacement, Repower, and Retrofit Only Small Fleets, as defined by ARB's Off-Road Regulation, are eligible to apply for off-road funding. Large and Medium off-road fleets are no longer eligible for grant funds. April 1, 2024 - May 31, 2024
School Bus Replacement Fleets must be in full compliance with State regulations prior to applying.
April 1, 2024 - May 31, 2024