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HB 5672

AN ACT CONCERNING EMISSION STANDARDS FOR VEHICLES SOLD IN THE STATE.

2025 Regular Session Introduced by Mark Anderson and 2 co-sponsors

HB 5672 sets stricter in-state vehicle emission standards to cut pollution and greenhouse gases; affects manufacturers, dealers, and buyers; effective 9/1/2025.

REF. TO JOINT COMM. ON Environment
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Bill Summary · HB 5672

Summary — HB 5672

Title: AN ACT CONCERNING EMISSION STANDARDS FOR VEHICLES SOLD IN THE STATE
Bill Number: HB 5672
Subject: Motor vehicle emissions; Motor vehicle sales

Note: The full bill text was not included in the materials provided. This summary therefore describes the bill’s stated purpose and legislative history and outlines the typical kinds of provisions and impacts such a bill would create. For exact legal requirements, deadlines, and compliance language, consult the enrolled bill text (HB 5672) on the state legislature’s website.

Main purpose and intent

The bill’s title indicates its primary purpose is to establish or revise emission standards that apply to motor vehicles sold within the state. The intent is to reduce vehicle-related air pollution and greenhouse gas emissions by regulating the emissions performance of new vehicles offered for sale.

Key procedural and timeline details (from legislative history)

  • Introduced: April 14, 2025 (referred to Natural Resources; also referred to joint committees on Environment and Local Government at various stages).
  • Passed both chambers in May 2025 (House and Senate recorded votes May 10–28, 2025).
  • Sent to Governor: May 31, 2025.
  • Filed without Governor’s signature: June 20, 2025 (becomes law without signature).
  • Effective date: September 1, 2025.
  • Committee action: Reported favorably without amendments in committee; considered in public hearings.

Likely/typical provisions (based on bill title — verify in enrolled text)

Because the full statutory language is not provided, the following are common elements found in state-level vehicle emissions bills and are plausible components of HB 5672:
- Adoption or alignment with specific tailpipe emission standards (e.g., stricter CO2/NOx standards or adoption of California emissions standards).
- Requirements for manufacturers/dealers regarding allowable fleet-average emissions or minimum percentages of zero-emission vehicle (ZEV) sales by model year.
- Labeling, reporting, and certification requirements for vehicles sold in-state.
- Enforcement mechanisms, penalties, and compliance timelines for manufacturers or dealers who fail to meet standards.
- Authority for a state environmental agency to implement regulations, issue guidance, and adjust standards over time.
- Provisions addressing infrastructure needs (charging or fueling), incentives, or coordination with state transportation and energy agencies (may be separate legislation).

Who would be affected

  • Vehicle manufacturers and distributors (compliance, production planning).
  • New-vehicle dealers (sales, inventory, disclosures).
  • Consumers (vehicle availability, potentially purchase prices and operating costs).
  • State agencies responsible for environmental regulation and enforcement.
  • Automotive service industry and charging/fueling infrastructure providers.

Potential impacts

  • Environmental and public-health benefits from reduced tailpipe pollutants and greenhouse gases.
  • Market shifts toward lower-emission and zero-emission vehicles; increased demand for charging/fueling infrastructure.
  • Compliance costs for manufacturers and dealers, which can affect pricing and model availability.
  • Possible need for state-level rulemaking to implement and enforce standards.

Related legislation

  • SB 3066 (companion)
  • HB 5657 (companion)

For precise obligations, regulatory language, timelines, and any exceptions, consult the enrolled bill text or the state’s official legislative website for HB 5672 (effective 9/1/2025).

Compiled from official sources — confirm details with the bill’s official record.

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