New Hampshire State Clean Diesel Program

DERA grant program aims to reduce emissions from diesel engines.

old diesel engineThe New Hampshire Clean Diesel Grant Program is a program 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/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 idle reduction technologies, engine replacement, vehicle and equipment replacement, and aerodynamic technologies. Funding opportunities are guided each year by our annual DERA work plan. See the 2022 NHDES Work Plan.

Grant funding requires a match by the grantee; the match requirement depends on the project (i.e. replacing a diesel vehicle with an electric vehicle requires a 55% match; replacing an old diesel vehicle with a newer, cleaner diesel vehicle requires a 75% match; etc.).

This program is a reimbursement program only.

Funding Opportunity - Request for Proposals Open as of July 15, 2022 

NHDES requests proposals for eligible diesel emission reduction projects utilizing EPA DERA federal fiscal year 2022 funds.

After Round 2 of the Request for Proposals, NHDES has received 11 proposals. Eligible proposals were evaluated by the Scoring Committee. Neither eligibility nor selection guarantee funding. Projects must be approved by Governor & Council before funds may be expended.

Because the sum of requested funds among all proposals received is less than the total anticipated funding amount, Round 3 of the 2022 NH Clean Diesel Grant Program is now open through March 31, 2023 at 4:00 PM (Eastern Time). NHDES anticipates having around $900,000 available for Round 3.


UPDATE: Project completion dates have been extended to September 30, 2024. 

UPDATE 2: Round 3's deadline has been extended from January 1, 2023 to March 31, 2023.


Timelines, funding amounts, scoring criteria, eligibility restrictions, and more can be found in the Request for Proposals, which is available through the link below.

The designated contact person for this RFP is Ricky DiCillo, Grants Coordinator, NHDES – Air Resources Division. Any questions related to this RFP must be submitted by email to

Watch the recording of our Program Overview Webinar with live Q&A, originally held August 9, 2022!

Past Funding

Scoring Results and Funding Amounts:

Recent Grant Recipients:

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

Grants Coordinator
Supervisor, Mobile Sources Section