St. Peters, MO Noise Ordinances: Amplified Music & Outdoor Sound (2026)
Amplified music rules in St. Peters, MO, also called sound permit, PA system, or live music ordinances, set decibel limits, time-of-day restrictions, and when permits are required.
Key Facts
- Governing section
- Section 210.390(C)(16) and (F)
- Residential daytime cap
- ~59-70 dB, 7 AM-10:30 PM
- Residential nighttime cap
- ~54-65 dB, 10:30 PM-7 AM
- Max fine
- $500 per day of violation
- Exempt
- City-sponsored events, special event permits
Summary
In the City of St. Peters, Missouri, playing a radio, loudspeaker or sound amplifier broadcast from the public streets to advertise a business or attract attention to a building is a prohibited noise if it exceeds the criteria in the City's objective decibel standards under Section 210.390.
16. The use, operation or permitting to be played, used or operated any radio-receiving set, musical instrument, phonograph, loudspeaker, sound amplifier or other machine or device for the producing or reproducing of sound which is broadcast from the public streets for the purpose of commercial advertising or attracting the attention of the public to any building or structure that is determined to be excessive based upon the criteria set out in this Section.
Full Breakdown
Section 210.390(C)(16) of the Municipal Code lists, among the acts declared to be loud, disturbing and unnecessary noises, the use or operation of any radio-receiving set, musical instrument, phonograph, loudspeaker, sound amplifier or similar device that is broadcast from the public streets for the purpose of commercial advertising or attracting the attention of the public to any building or structure when it is determined to be excessive based upon the criteria set out in this Section. Those criteria are the objective noise standards in Subsection (F): in residential zoning districts, sound measured at the front building line of the receiving property may not exceed roughly 59 to 70 dB between 7:00 a.m. and 10:30 p.m., or roughly 54 to 65 dB between 10:30 p.m. and 7:00 a.m., depending on the averaging period used.
A separate catch-all in Subsection (C)(3) also bars operating any sound-amplifying device so loudly as to disturb persons in the vicinity or render the same a public nuisance, covering amplified music that is not street advertising. The ordinance, rewritten by Ord. No. 7236 on December 19, 2019, exempts amplified sound at City-sponsored public affairs and at events under a City special event permit issued by the Board of Aldermen or City Administrator, so a permitted festival stage is not automatically a violation even if it is loud.
Violations & Fines
The City Administrator's office fields complaints, and the Code Enforcement Officer measures sound with a calibrated meter at the front building line of the receiving property to decide whether the criteria in Subsection (F) were exceeded. A violator gets a written notice and a hearing at least seven days out, held at St. Peters City Hall; an unresolved case can go to the Police Department and St. Peters Municipal Court, where conviction brings a fine of up to $500, with each day a separate violation.
Frequently Asked Questions
Can a business play loud music from a loudspeaker outside to attract customers?
Does a City-permitted festival get an exception for amplified music?
Who measures whether amplified sound is too loud?
Sources & Official References
Other rules in St. Peters
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