Green Bay, WI Noise Ordinances: Vehicle Noise (2026)
Key Facts
- Muffler required
- At all times, good working order
- Max forfeiture
- $500 per violation
- Banned devices
- Cutouts, bypasses, noise amplifiers
- Motorcycle rule
- EPA-labeled muffler post-1982
Summary
Green Bay requires every motor vehicle to run a working muffler and bans loud, out-of-repair, or modified exhausts on city streets, with fines up to $500 under Municipal Code § 40-72.
(b)Any person or owner is prohibited from creating or allowing any unreasonably loud, disturbing, and unnecessary noise. Noise of such character, intensity, or duration as to be detrimental to the life or health of any individual, or in disturbance of the public peace and welfare, is prohibited. The use of any automobile, motorcycle, streetcar or vehicle so out of repair or in such manner as to cause loud and unnecessary grating, grinding, rattling, or other unreasonable noise is prohibited.
Full Breakdown
Section 40-72 prohibits operating any automobile, motorcycle, or other vehicle that is out of repair or driven in a manner causing loud grating, grinding, rattling, or other unreasonable noise, and requires every motor vehicle to carry a muffler in good working order at all times, banning cutouts, bypasses, or similar devices. It's also illegal to sell, install, or use any exhaust modification that amplifies engine noise beyond a reasonable level, and post-1982 motorcycles need an exhaust muffler bearing the required federal EPA label.
Violations & Fines
An officer can cite a vehicle after witnessing the noise or receiving a sworn written complaint, unless the owner refuses a Police Department inspection; violators forfeit up to $500 per offense.
Frequently Asked Questions
Is a loud aftermarket exhaust legal in Green Bay?
Can police ticket me for a loud car without pulling me over first?
Sources & Official References
Other rules in Green Bay
Compare Green Bay to another location·View the Wisconsin noise ordinances overview
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Vehicle Noise in Nearby Cities
How other cities in Brown County handle vehicle noise.