Quiet hours in St. Louis County, MO — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
St. Louis County does not set fixed quiet hours; instead SLCRO §716.073 makes it unlawful at any time to play any radio, instrument, TV, or audio device at a volume that disturbs another person. Noise plainly audible more than 50 feet from the source is presumed a violation.
Chapter 716 of the St. Louis County Revised Ordinances (SLCRO) — Peace, Order and Conduct — controls noise countywide rather than via timed quiet hours. SLCRO 716.073 (Public Disturbance of the Peace — Loud Noise) bans audio devices, shouting, singing, or noise-making at a volume that disturbs the peace; SLCRO 726.212 covers the same conduct as a domestic disturbance. The 50-foot 'plainly audible' threshold is the enforcement trigger. Chapter 625 (Noise Control Code) layers on dB(A) standards. Construction noise is treated separately; the 88 municipalities each set their own construction-hour rules.
Class C misdemeanor / county ordinance violation; fines up to $1,000 and/or up to 1 year in county jail per SLCRO 701.180 general penalty. Police-issued summons sends the matter to St. Louis County Municipal Court.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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