San Marcos, TX Noise Ordinances: Vehicle Noise (2026)
Key Facts
- Audibility limit
- 30 feet from vehicle
- Vibration limit
- Felt at 30 feet
- Business exception
- 8 a.m.–9 p.m. only
- Engine brakes
- Unmuffled use banned citywide
Summary
San Marcos bans operating a vehicle radio, stereo, or CD player audible 30 feet away or causing felt vibration at that distance.
It is unlawful for any person operating or controlling a motor vehicle to operate any radio, stereo receiver, compact disc player, cassette tape player, or other similar device in the motor vehicle in such a manner that, when operated, it is: (1) Audible in a public place or on private property other than that owned or occupied by the person at a distance of 30 feet or more from the vehicle, or (2) Causes vibration that can be felt at a distance of 30 feet or more from the vehicle.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 41).
Full Breakdown
Under Sec. 34.087, it's unlawful to operate a car radio, stereo receiver, CD player, cassette player, or similar device so it's audible in a public place or on someone else's property from 30 feet or more away, or so it causes vibration felt at 30 feet or more. Businesses using sound equipment in vehicles during normal operations between 8:00 a.m. and 9:00 p.m. have a defense to prosecution. Separately, Sec. 82.102 bans unmuffled compression-release engine brakes (Jake brakes) unless muffled to prevent noise louder than normal engine operation, with signs posted at city entrances.
Violations & Fines
Violating the vehicle stereo noise limit is a Class C misdemeanor citation; excessive residential noise violations under the same division carry fines up to $500.00.
Frequently Asked Questions
Can I get a ticket for a loud car stereo in San Marcos?
Are Jake brakes illegal in San Marcos?
Sources & Official References
Other rules in San Marcos
Texas rules heatmap·Compare San Marcos to another location·View the Texas noise ordinances overview
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