Summary of HR 2140 — Diesel Emissions Reduction Act of 2025

Overview

HR 2140, titled the Diesel Emissions Reduction Act of 2025, is an introduced bill in the U.S. House of Representatives. The measure aims to address diesel engine emissions, building on the framework of prior diesel reduction programs. As introduced on March 14, 2025, the bill has been referred to the House Committee on Energy and Commerce. There is no floor action recorded yet.

• Primary sponsor: Doris O. Matsui (D-CA)
• Cosponsors: Ken Calvert (R-CA), Chellie Pingree (D-ME), Nicholas A. Langworthy (R-NY)

Intent and Scope (as inferred from the title)

Based on the bill’s title, the act would focus on reducing emissions from diesel engines. While the exact text is not provided here, such legislation typically seeks to authorize funding, set program goals, and outline eligible technologies and projects intended to lower diesel-related pollutants (e.g., particulate matter and nitrogen oxides) across fleets, equipment, and vehicle types.

Key Provisions (subject to the actual text)

The precise provisions will be determined by the introduced bill, but typical elements in Diesel Emissions Reduction Act programs often include:
- Authorization of federal funding for diesel emission reduction projects
- Grant, rebate, or rebate-like programs to retrofit, repower, replace, or improve diesel engines and equipment
- Focus areas such as school buses, transit fleets, trucks, construction equipment, and off-road engines
- Standards and reporting requirements for funded projects
- Eligibility criteria for applicants (e.g., state and local governments, school districts, utilities, trucking fleets, and equipment owners)
- Potential priority outcomes (emission reductions, public health benefits, and job creation)
- Duration of program funding and any reauthorization provisions (these specifics would be spelled out in the bill text)

Note: Because the full text is not provided in the brief, the exact programs, funding levels, and eligibility rules should be confirmed by reviewing the bill and accompanying committee materials.

Affected Parties and Beneficiaries

• Government and public entities: state and local agencies, school districts, transit authorities
• Private sector: trucking fleets, freight operators, construction and industrial equipment owners, and manufacturers of retrofit and replacement technologies
• Communities: populations affected by diesel pollution, particularly in urban areas and near major freight corridors

Procedural and Timeline Aspects

• Introduced: March 14, 2025
• Current status: Referred to the House Committee on Energy and Commerce; no further committee or floor actions listed
• Next steps: Committee consideration, potential amendments, signaling progression to floor debate and voting

How to Track the Bill

• Full text and amendments: Congress.gov
• Committee activity: House Committee on Energy and Commerce pages
• Sponsorship and co-sponsorship changes: Congress.gov and the House GOP/Democrat leadership pages

Observations

The information provided does not include the bill’s specific provisions or funding details. To deliver a complete, factual analysis, the official text and any committee reports or summary statements should be consulted once available.