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HB 441 · 2025 · House · Transportation Committee

Banning 'rolling coal' diesel emissions

AI-generated

relative to visible motor vehicle diesel emissions and "rolling coal".

Prohibits certain diesel-powered motor vehicles from visibly emitting smoke on a public way or parking area due to an altered exhaust or emission control system.AI-generated

Status

Killed in the House — Inexpedient to Legislate · March 26, 2025
  1. ✓Introduced
  2. ✕House
  3. Senate
  4. Governor
  5. Law

Analysis

This bill prohibits certain diesel-powered motor vehicles from visibly emitting smoke on a public way or parking area due to a permanent or temporary alteration to the exhaust system or emission control system of the motor vehicle, commonly known as "rolling coal".

From the bill's official ANALYSIS section.

Official record

Bill page — docket & status

gc.nh.gov · the authoritative source

Sponsors

Rep. Heath HowardDPrimeDeputy Ranking Member· Executive Departments and Administration
  • Rep. Jaci GroteDDemocratic Advisor
  • Rep. Jessica LaMontagneDDeputy Ranking Member· Health, Human Services, and Elderly Affairs
  • Rep. Jim MaggioreDDeputy Ranking Member· Municipal and County Government
  • Rep. Kat McGheeDRanking Member· Science, Technology, and Energy

Also: Rep. Lucius ParshallD, Rep. Rosemarie RungD, Rep. Suzanne VailD, Rep. Peter LovettD, Sen. Debra AltschillerD

Public testimony

25 signed in online · 4 wrote testimony

88% support12% oppose0% neutral

In their wordsVerbatim, exactly as submitted

“I believe this bill would allow intentional violation of our environmental rules for the convenience of some individuals, please adopt this bill. We do not need any more diesel fuel smoke in the air”
— Edward Haas, Keenesupports
“Are cops expected to be experts on diesel vehicles now? Are we forcing vehicle owners to spend money to remove aftermarket items? Diesels, even the modern EPA ruined urine dosed diesels smoke.…”
— Simon Berrio, Daltonopposes

Verbatim excerpts of submitted testimony, quoted from the testimony tool.

Read the testimony · as of Aug 12, 2026

Hearings

  • 2025-02-1110:00 amHouse TransportationLOB 203Public hearing
  • 2025-03-0410:00 amHouse TransportationLOB 203Public hearing

Legislative history

  1. Jan 9, 2025HouseIntroduced (in recess of) 01/09/2025 and referred to Transportation HJ 3 P. 10
  2. Feb 11, 2025HousePublic Hearing: 02/11/2025 10:40 am LOB 203
  3. Mar 4, 2025HouseExecutive Session: 03/04/2025 10:00 am LOB 203
  4. Mar 4, 2025HouseCommittee Report: Inexpedient to Legislate 03/04/2025 (Vote 16-0; CC) HC 17 P. 24
  5. Mar 26, 2025HouseInexpedient to Legislate: MA VV 03/26/2025 HJ 10 P. 44

Coverage

No reporting linked yet.

Documents (PDF)

Bill text & amendments link direct to gc.nh.gov; committee reports stream from the state record.