Clean diesel grants
Transportation is the largest source of climate pollution in Washington, accounting for nearly half of total greenhouse gas emissions. Diesel exhaust is responsible for 70 percent of Washington’s airborne cancer risk. The Governor and Legislature are leading policies and initiatives to reduce impacts from climate change and improve public health by accelerating the transition from fossil fuels to a zero emission transportation system. Clean diesel grants will reduce greenhouse gases and protect people from toxic diesel emissions. This grant's primary purpose is to electrify school buses. It also supports idle reduction and other diesel equipment engine replacements.
Funding cycle
- Amount of funding available: Varies – see individual grant guidelines for eligibility
- Grant award limit: Varies – see individual grant guidelines for eligibility
- Amount of matching funds required: Varies – see individual grant guidelines for eligibility
Applications are currently being accepted.
Open and future grants
| Grant | Application materials | Application due date |
Award notifications |
|---|---|---|---|
| Air Quality Clean Diesel Grant Program 2024–2025 (diesel marine engines and training pilot programs) |
April 10, 2024 – June 13, 2024 |
Third quarter 2024 | |
| Air Quality Clean School Bus Grant Program 2023–2025 (round 2) | available by second quarter 2024 | May 15, 2024 – August 15, 2024 | Fourth quarter 2024 |
Closed grants
| Grant | Application materials | Award notifications |
|---|---|---|
| Air Quality Clean Diesel Grant Program 2023–2025 (fuel cell transit buses and zero emission yard trucks) | First quarter 2024 | |
| Air Quality Clean School Bus Grant Program 2023–2025 (round 1) | First quarter 2024 |
Funding is available for the following entities:
Air Quality Clean School Bus Grant Program 2023–2025
- School bus owners that transport students to K-12 schools overseen by the Washington Office of Superintendent of Public Instruction (OSPI) for the 2023–2024 school year
Air Quality Clean Diesel Grant Program 2023–2025
- Cities
- Counties
- Local clean air agencies
- Non-profit organizations
- Ports
- Public utility districts/co-ops
- School districts
- State government
- Transit authorities
- Tribes
Air Quality Clean School Bus Grant Program 2023–2025
- Scrap and replace diesel school buses with zero emission school buses.
Air Quality Clean Diesel Grant Program 2023–2025
- Scrap and replace diesel yard trucks with zero emission yard trucks
- Scrap and replace diesel transit buses with zero emission transit buses
Air Quality Clean Diesel Grant Program 2024– 2025
- Scrap and replace diesel marine engines with all-electric or hybrid electric system
- Vocational training pilot programs to:
- train school bus mechanics, bus drivers, and office staff about the maintenance and operation of zero emission fleets
- prepare high school students for jobs created by transitioning diesel/fossil-fueled fleets to zero emission fleet
More information about this funding program
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