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Clean Diesel Grant Programs

The DNR administers the Clean Diesel Grant Programs to help reduce diesel emissions from both public and private vehicle fleets across the state.

These grant programs have made significant achievements across our state. For details, check out the Clean Diesel Grant Summary Report - March 2021.

The DNR does not administer NOx reduction programs related to the Volkswagen Environmental Mitigation Trust. The Wisconsin Department of Administration is the lead agency for this activity. For details, visit the DOA website [exit DNR].

We welcome your feedback. Please email your comments or suggestions about the Clean Diesel Grant Programs to DNRCleanDiesel@wisconsin.gov. Thank you!

2026 DERA National Grants

The U.S. Environmental Protection Agency is accepting applications from eligible entities to accelerate the upgrade or retirement of the nation’s aging diesel engine fleet under the Diesel Emissions Reduction Act National Grants Program.

The following entities are eligible to apply:

  1. A regional, state, local agency, tribal agency or port authority that has jurisdiction over transportation or air quality. School districts, municipalities, metropolitan planning organizations, cities and counties are all generally eligible entities under this grant program.
  2. A nonprofit organization or institution that:
    1. represents or provides pollution reduction or educational services to people or organizations that own or operate diesel fleets; or
    2. has, as its principal purpose, the promotion of transportation or air quality.

Refer to the 2026 DERA National NOFO for specific information about this grants program.

All application packages must be submitted electronically to the EPA through the Grants.gov website no later than Friday, Jan. 22, 2027, at 11:59 p.m. (ET) to be considered.

DERA Wisconsin Clean Diesel Grant Program Grantee Lists

If you would like a grantee list from 2008-2015, please contact DNRCleanDiesel@wisconsin.gov.

Additional Resources

For more information, email