Congress moves to strip states of power to set stricter vehicle emission rules
H.R. 2218 — Stop CARB Act of 2025 · Filed by Troy Nehls (R-TX) · 7 cosponsors · Introduced Mar 18, 2025 · Referred to committee
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What it does
This bill repeals California's authority under the Clean Air Act to set its own vehicle and engine emission standards and to grant waivers allowing other states to adopt California's stricter standards. It eliminates all existing waivers California has issued and denies any pending waiver applications, effectively blocking California and other states from enforcing emission rules stricter than federal standards for cars, trucks, construction equipment, farm equipment, locomotives, and nonroad engines.
Why we flagged it
The bill's core function is to strip California and other states of authority to enforce stricter vehicle and engine emission standards, eliminating a major regulatory pathway for air pollution control. The title frames this as reducing regulatory burden, but the operative effect is deregulation that benefits manufacturers at the cost of air quality.
What the text implies
- Eliminates California's Section 209 waiver authority retroactively, invalidating all existing waivers issued to other states (e.g., Massachusetts, New York, Vermont) that have adopted California standards. Those states lose the legal basis for their own emission rules mid-implementation.
- Blocks pending waiver applications, preventing states from adopting California standards even if they have already begun regulatory processes or public comment periods.
- Removes the primary mechanism by which states have historically achieved air quality improvements beyond federal minimums. Federal standards are set by EPA; California's waiver authority is the only pathway for state-level stricter rules.
- Affects nonroad engines (construction, farm, locomotives) in addition to vehicles, eliminating emission controls on equipment that contributes significantly to air pollution in rural and industrial areas.
- May trigger legal challenges from states and environmental groups, creating uncertainty for manufacturers and states that have already invested in compliance infrastructure.
Section numbers refer to the bill text the analysis read — linked under Primary records below.
Who it affects
Ordinary citizens lose access to cleaner air and stronger pollution protections. Eliminating California's waiver authority and existing waivers removes a proven mechanism for reducing vehicle emissions and air pollution in states that have adopted California standards. Citizens in those states face higher air pollution and associated health costs (respiratory disease, asthma, premature mortality), while automakers and equipment manufacturers avoid compliance costs.
Who stands to gain
- automotive manufacturers
- heavy equipment manufacturers (construction, farm, locomotive)
- fuel refiners and importers
- engine manufacturers
Named in the bill
California Air Resources Board (CARB), Environmental Protection Agency (EPA), Clean Air Act Section 209, Clean Air Act Section 177, Massachusetts, New York, Vermont, other Section 177 states
Where it stands
7 cosponsors: 7 Republicans.
- Mar 18, 2025 — Introduced · Congress.gov: “Introduced in House”
- Mar 18, 2025 — Referred to House Committee on Energy and Commerce · Congress.gov: “Referred to the House Committee on Energy and Commerce”
Dates and quoted wording are Congress.gov's action record; the timeline shows status changes, not every procedural step.
Money around this bill
5 lobbying clients named this bill on 7 disclosure filings across 3 quarters, Sep 2025 to Jun 2026. Those filings disclosed $4,250,000 in lobbying spend. A filing names 31 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 78% of bills with at least one filing.
Troy Nehls, the sponsor, reported $202,300 in PAC receipts in the 2026 cycle.
- Union Pacific Corporation — $1,770,000 on 2 filings
- Bnsf Railway Company — $960,000 on 1 filing
- Specialty Equipment Market Association — $760,000 on 2 filings
- American Trucking Associations — $720,000 on 1 filing
- Bnsf Railway Company — $40,000 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 (2,914 characters) on Aug 11, 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 Sep 2025 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.
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