HJRES-89 — Providing congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Environmental Protection Agency relating to "California State Motor Vehicle and Engine and Nonroad Engine Pollution Control Standards; The "Omnibus" Low NOX Regulation; Waiver of Preemption; Notice of Decision".

This bill became law on 2025-06-12 as Public Law No. 119-17.

The summary below describes the bill at the version we last reviewed; the enacted text may differ.

YourVoice.Now Summary

EnvironmentCorporate Benefits

Truck and equipment engines no longer have to meet California's tougher smog limits.

Environment

California's tougher engine pollution limits — ended June 2025

The Clean Air Act lets California set tougher engine rules than other states. But the EPA has to sign off first. The EPA did so in January 2025. Congress then canceled that sign-off.

Corporate Benefits

Engine makers can skip California's tougher standard

Engine and truck makers no longer have to build a cleaner version for California. States that had picked up its standard cannot require one either.

More about this bill

California can no longer enforce its own stricter pollution limits on vehicle and off-road equipment engines. Congress canceled the federal approval that made those limits legal. It became law in June 2025. Under the Clean Air Act, California may set tougher engine rules than the rest of the country. But it needs a sign-off from the EPA first. The EPA gave that sign-off in January 2025. This law canceled it. Nothing changes in your own bills or paperwork. The effect lands on engine and truck makers, fleet owners, and states that had picked up California's standard. Those makers now build to the federal standard alone. The limits at stake covered nitrogen oxides, the gases that help form smog.

Congressional Summary

This joint resolution revokes the waiver granted to the California Air Resources Board regarding new emissions standards for new 2024 and subsequent model year on-road heavy-duty vehicles and engines, off-road diesel engines, and off-road diesel-fueled auxiliary power units. (Under the Clean Air Act, California may seek waivers of the preemption prohibiting states from enacting certain emission standards.)Specifically, the joint resolution nullifies the Environmental Protection Agency notice titled California State Motor Vehicle and Engine and Nonroad Engine Pollution Control Standards; The ‘Omnibus’ Low NOX Regulation; Waiver of Preemption; Notice of Decision.

Legislative Subjects

Administrative law and regulatory proceduresAir qualityCaliforniaClimate change and greenhouse gasesCongressional oversightEnvironmental Protection Agency (EPA)Federal preemptionHybrid, electric, and advanced technology vehiclesMotor vehicles

Details

Congress: 119th
Chamber: House
Status: summarized
Action: Public Law
Action Date: 2025-06-12
Date Added: 2026-07-18
Source: Congress.gov →

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