New Hampshire Clean Diesel Grant Program

DERA grant program aims to reduce emissions from diesel engines

old diesel engineThe New Hampshire Clean Diesel Grant Program is funded by EPA through the Diesel Emissions Reduction Act (DERA) with additional funding from the New Hampshire VW Mitigation Trust. The program is managed by the Air Resources Division, Technical Services Bureau of NHDES. The goal of this grant program is to reduce the emissions from diesel engines in the State. Projects eligible for funding include vehicle and equipment replacement, engine replacement, idle reduction technologies and aerodynamic technologies. Funding opportunities are guided each year by the annual DERA work plan. See the 2023 NHDES Work Plan.

Grant funding reimburses a portion of eligible project costs; the portion depends on the project type. For example, a project replacing a diesel vehicle with an electric vehicle can be reimbursed for up to 45% of the project cost; a project replacing an old diesel vehicle with a newer, cleaner diesel vehicle can be reimbursed for up to 25% of the project cost.

This program is a reimbursement program only.

Funding Opportunity - Round 2 of the Request For Proposals is OPEN!

NHDES requests proposals for eligible diesel emissions reduction projects, utilizing approximately $250,000 of remaining EPA DERA federal funds.

  • Round 2 project proposals are due August 2, 2024, 4:00 PM Eastern Time.

Timelines, funding amounts, scoring criteria, eligibility restrictions and more can be found in the Request For Proposals and EPA Program Guide, which are available through the links below. 

Any questions related to this RFP and any project proposals must be submitted by email to the Mobile Sources Grants email address,


Past Grant Recipients       Past Scoring Results       Past Scoring Criteria  


EPA also offers competitive grants separate from New Hampshire’s Clean Diesel Grant Program. For more information about these grants please go to EPA's DERA webpage.

This website and its contents were last reviewed by the Mobile Sources Team as of July 10, 2024.