Congress extends diesel-pollution cleanup program through 2029
H.R. 2140 — Diesel Emissions Reduction Act of 2025 · Filed by Doris Matsui (D-CA) · 3 cosponsors · Introduced Mar 14, 2025 · Passed chamber
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What it does
This bill extends the Diesel Emissions Reduction Program, a federal initiative that funds projects to reduce emissions from diesel engines, by five years—from an expiration date of 2024 to 2029. The program provides grants and incentives for retrofitting or replacing older diesel equipment in transportation, agriculture, and industry. Ordinary citizens benefit through improved air quality and reduced pollution-related health costs.
Why we flagged it
The bill's sole operative function is to extend an existing federal program designed to reduce diesel emissions and improve air quality. It is a routine reauthorization with no new policy mechanism or structural change.
What the text implies
- Diesel equipment manufacturers and retrofit suppliers may benefit from continued demand for compliant equipment, though the bill does not name or directly subsidize them.
- States and municipalities that have relied on federal diesel-reduction grants to meet air-quality standards will retain funding certainty through 2029, affecting local environmental compliance strategies.
Section numbers refer to the bill text the analysis read — linked under Primary records below.
Who it affects
The bill extends a public-health program that reduces air pollution and associated respiratory and cardiovascular harms. Citizens in regions with high diesel-engine concentrations (ports, trucking corridors, agricultural areas) benefit from continued funding for emission-reduction projects that lower ambient pollution and improve public health.
Who stands to gain
- diesel equipment retrofit and replacement suppliers
- state and local environmental agencies (indirect, through continued grant availability)
Named in the bill
Energy Policy Act of 2005, Section 797(a), Diesel Emissions Reduction Program, House Committee on Energy and Commerce
Where it stands
3 cosponsors: 2 Republicans, 1 Democrats.
- Mar 14, 2025 — Introduced · Congress.gov: “Introduced in House”
- Mar 14, 2025 — Referred to House Committee on Energy and Commerce · Congress.gov: “Referred to the House Committee on Energy and Commerce”
- Jul 14, 2026 — Markup held in committee · Congress.gov: “Subcommittee Consideration and Mark-up Session Held”
- Sep 14, 2026 — Reported out of committee · Congress.gov: “Placed on the Union Calendar, Calendar No. 718”
- Sep 15, 2026 — Passed the House · Congress.gov: “On motion to suspend the rules and pass the bill Agreed to by the Yeas and Nays: (2/3 required): 343 - 79…”
- Sep 15, 2026 — Floor vote scheduled · Congress.gov: “Mr. Guthrie moved to suspend the rules and pass the bill”
Dates and quoted wording are Congress.gov's action record; the timeline shows status changes, not every procedural step.
Money around this bill
3 lobbying clients named this bill on 3 disclosure filings across 1 quarter, Jun 2026 to Jun 2026. Those filings disclosed $1,962,000 in lobbying spend. A filing names 78 bills on average, so that figure is what each filing reported, not a share belonging to this bill.
More lobbying clients named this bill than 61% of bills with at least one filing.
Doris Matsui, the sponsor, reported $1,026,688 in PAC receipts in the 2026 cycle.
- Caterpillar Inc — $1,142,000 on 1 filing
- American Trucking Associations — $720,000 on 1 filing
- Sierra Club — $100,000 on 1 filing
Lobbying Disclosure Act filings through Jul 20, 2026. A filing shows who paid to lobby on a bill it names, not what changed.
How this was measured
Analysis — Quorum's AI read the bill text published by Congress.gov (380 characters) on Jul 18, 2026. Section numbers in the findings refer to that text, linked below; transparency and hidden-provision scores are compared against the median of 16,222 analysed bills.
Status and sponsors — Congress.gov's bill record — actions, committee referrals and cosponsors — loaded nightly. The timeline shows status changes, not every procedural action.
Money — Senate Lobbying Disclosure Act filings whose specific-issue field names this bill for quarters ending Jun 2026 to Jun 2026. A filing's amount is reported whole beside the median number of bills a filing names; it is never divided across them. PAC receipts are FEC-reported contributions to the sponsor's candidate committee in the 2026 cycle.
As of — lobbying records through Jul 20, 2026 · page rendered 2026-10-20.
“Congress extends diesel-pollution cleanup program through 2029” QuorumCivic. https://share.quorumcivic.app/bill/119/hr2140 Report an error
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