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Find similar grantsDiesel Reduction Combined Funding Program is sponsored by Washington State Department of Ecology. Offers grants to reduce diesel emissions, primarily through electrification of school buses and reduction of idling.
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Diesel reduction grants - Washington State Department of Ecology > Payments, contracts & grants > Diesel reduction grants Diesel reduction grants will reduce greenhouse gases and protect people from toxic diesel emissions. This grant's primary purpose is to electrify school buses. It also helps reduce idling and replace other diesel equipment engines.
Transportation is the largest source of climate pollution in Washington, accounting for nearly half of total greenhouse gas emissions. Diesel exhaust is responsible for two-thirds of Washington’s airborne cancer risk. The Governor and Legislature are creating policies and initiatives to reduce impacts from climate change and improve public health by moving from fossil fuels to a zero emission transportation system.
Apply for or manage a grant or loan Get guidance for managing a grant or loan See a map of all Ecology grant-funded projects 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.
Washington State Diesel Reduction Combined Funding Program Application questions and answers Presentation from September 14, 2026 information session September 8, 2026 – December 10, 2026 Zero emission school bus and fleet transition grant program Grant guidelines (updated April 2026) Air Quality Clean School Bus Grant Program 2023–2025 (round 2) Application frequently asked questions (FAQ) Air Quality Clean Diesel Grant Program 2024–2025 (diesel marine engines and training pilot programs) Air Quality Clean Diesel Grant Program 2023–2025 (fuel cell transit buses and zero emission yard trucks) Air Quality Clean School Bus Grant Program 2023–2025 (round 1) Funding is available for the following entities: Washington State Diesel Reduction Combined Funding Program Organizations licensed in Washington including, but not limited to: Limited liability companies Non-profit 501(c)(3) organizations Other legal business entities Multi-unit/-family residential buildings Investor-owned utilities and contracted municipal utilities State, local, or Tribal government and related entities in Washington including, but not limited to: Public utility districts and municipal utilities Special districts (such as health districts, fire districts, college districts, school districts, metropolitan municipal corporations) Zero emission school bus and fleet transition grant program Zero emission school bus projects School bus owners that transport students to K-12 schools overseen by the Washington Office of Superintendent of Public Instruction (OSPI) for the 2025–2026 school year Vocational training projects Non-profit 501(c)(3) organizations Public utility districts/co-ops School districts, including skills centers Washington State Diesel Reduction Combined Funding Program Air quality diesel reduction grant program (AQDR-2027) Engine model year 2010-2017 emergency, freight, and vocational vehicles Cargo-handling equipment and yard trucks/terminal tractors operating off port property Air quality Volkswagen settlement ports and wheels (AQVWPW-2027) See Volkswagen enforcement action grants Zero emission school bus and fleet transition grant program Zero emission school bus projects Vehicle replacement – Scrap and replace existing eligible school buses with new zero emission school buses, including fleet transition and infrastructure equipment and activities associated with each replacement Additional fleet transition and infrastructure – Purchase equipment and conduct activities needed to support zero emission school bus maintenance and operations, including charging infrastructure Vocational training projects Train school bus mechanics, bus drivers, and office staff about the maintenance and operation of zero emission fleets Prepare 8th-12th grade students for jobs created by transitioning diesel/fossil-fueled fleets to zero emission fleet More information about this funding program Focus on: Electric School Bus Grants EPA: Diesel Emissions Reduction Act (DERA) Funding EPA: Reducing Diesel Emissions from Construction and Agriculture Reducing diesel emissions Volkswagen federal settlement and state penalty Volkswagen enforcement action grants Diesel Program Specialist kelly.
ocallahan@ecy. wa. gov Stay informed.
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According to the current listing, eligibility includes: Public and private entities in Washington State involved in diesel emission reduction projects. Confirm the full requirements in the official notice before applying.
Applications for Diesel Reduction Combined Funding Program are due December 10, 2026. Build your timeline backwards from this date to cover registrations, approvals, and final submission checks.
Diesel Reduction Combined Funding Program is funded by Washington State Department of Ecology. Verify program details on the funder's official page before applying.
This opportunity targets applicants in Washington. If your organization operates elsewhere, check the official notice for location requirements.
Start from the official opportunity page linked in this listing — it carries the sponsor's submission instructions.
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