Westminster, CA Noise Ordinances: Vehicle Noise (2026)
Key Facts
- Park muffler rule
- Adequate muffler required, § 12.24.040(F)(7)
- Advertising vehicle rule
- Loudspeaker vehicles banned, § 10.52.020
- Advertising ban scope
- Central traffic district streets/alleys, any time
- Citywide backstop
- Ch. 8.28 mobile noise source dB(A) limits
- No vehicle-specific decibel limit
- General noise chapter has none
Summary
Westminster requires an adequate muffler on any motor vehicle operated inside a city park, and separately bans advertising vehicles equipped with sound-amplifying or loudspeaking devices from the central traffic district streets and alleys at any time. Both are enforced as infractions under the code's general penalty provisions.
No person shall operate or drive any vehicle used for advertising purposes, or any advertising vehicle equipped with a sound-amplifying or loudspeaking device upon any street or alley at any time within the central traffic district. ... No person in a park shall: ... F. Parking. ... 7. Fail to use a muffler adequate to deaden the sound of engine in a motor vehicle;
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4982734; v10 updated 2026-06-10).
Full Breakdown
040's broader prohibited-acts structure. 52 governing the central traffic district, bars operating or driving 'any vehicle used for advertising purposes, or any advertising vehicle equipped with a sound-amplifying or loudspeaking device upon any street or alley at any time within the central traffic district,' a flat, time-unlimited prohibition rather than a decibel standard. 28 noise ordinance instead regulates 'mobile noise sources' city-wide using the same 55-60 dB(A) zone standards that apply to fixed sources, measured against ambient noise and time-of-day cumulative-minute thresholds, without a vehicle-specific carve-out.
Violations & Fines
Operating a motor vehicle in a Westminster park without an adequate muffler violates Section 12.24.040(F)(7), and driving a loudspeaker-equipped advertising vehicle through the central traffic district violates Section 10.52.020; both are infractions enforceable under the code's general penalty and citation provisions applicable to their respective titles.
Frequently Asked Questions
Does Westminster require a muffler on cars driven in city parks?
Can an advertising vehicle with a loudspeaker drive through downtown Westminster?
Does Westminster set a decibel limit for loud car stereos citywide?
Sources & Official References
Other rules in Westminster
California rules heatmap·Compare Westminster to another location·View the California noise ordinances overview
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