Noise Ordinances in St. Louis, MO (2026)
7 verified noise ordinances for St. Louis, Missouri, sourced directly from the municipal code and official government pages.
Verified from official government sources
Quiet Hours
St. Louis defines nighttime hours as 10 p.m. to 7 a.m. and requires stationary noise sources in residential Districts A through E to stay at or below 50 dB(A) sustained then, five decibels under the daytime cap.
St. Louis Nighttime Noise Limits
Some RestrictionsSt. Louis Revised Code §§ 15.51.010(H),(O) & 15.51.030, Table I
H.Daytime hours: 7:00 o'clock a.m. to 10:00 o'clock p.m., prevailing local time. ... O.Nighttime hours: 10:00 o'clock p.m. to 7:00 o'clock a.m., prevailing local time. ... 1.Zoning Districts Zoned A—E ... Nighttime Hours Tn* (dB(A))** 60 50 or less ... 0 66 or greater
Construction Hours
St. Louis bars construction, demolition and excavation noise within 1,000 feet of homes before 6 a.m. and after dusk, Monday through Saturday, with only a 3-day emergency exception.
St. Louis Construction Noise Hours
Some RestrictionsSt. Louis Revised Code § 15.50.081
Construction, demolition and excavation within one thousand (1,000) feet of a residential property...is prohibited before 6:00 a.m. and after dusk, Monday through Saturday, except in case of an urgent necessity in the interest of public safety for a period of three (3) days. After three (3) days...unless a permit has been obtained from the Building Commissioner which allows specific action duri...
Barking Dogs
St. Louis bans keeping any animal, bird, or fowl whose frequent noise disturbs neighbors' comfort and repose, with a 100-foot audibility threshold defining excessive noise.
St. Louis Barking Dog Noise Rule
Some RestrictionsSt. Louis Revised Code § 15.50.040
The keeping of any animal, bird or fowl which, by causing frequent or long-continued noise, shall tend to disturb the comfort and repose of any person in the vicinity is prohibited. Any such noise that can be distinctly heard at a distance of more than one hundred feet from its source shall be excessive.
Leaf Blower Rules
St. Louis exempts lawn care equipment, including leaf blowers and mowers, from its citywide noise limits only from 7 a.m. to sunset; use outside those hours loses the exemption and must meet the ordinary decibel standards.
St. Louis Leaf Blower and Lawn Equipment Hours
Some RestrictionsSt. Louis Revised Code § 15.51.040(I)
To the extent provided in this section the provisions of this chapter shall not apply to: ... I. The operation of lawn care maintenance equipment with sound control devices equivalent to or better than original equipment from 7:00 a.m., prevailing local time to sunset.
Amplified Music & Outdoor Sound
St. Louis caps amplified sound on public property at audible beyond 75 feet and bars private-property playback louder than needed for on-site listeners.
St. Louis Amplified Sound Limits
Some RestrictionsSt. Louis Revised Code § 15.50.030
No person shall play any radio, music player, television, audio system or musical instrument upon private property at a volume louder than is necessary for convenient, normal hearing of the person or persons who are on the property... no person shall play any radio, music player, or audio system upon public property at a volume which is plainly audible at a distance greater than seventy-five (7...
Decibel Limits
St. Louis caps stationary noise sources by zoning district and time of day, from 55 dB(A) daytime near "A" through "E" residential zones up to 80 dB(A) at all hours in "J" and "K" industrial districts.
St. Louis Industrial Noise Limits
Some RestrictionsSt. Louis Revised Code § 15.51.030
No person shall operate or permit to be operated any stationary noise source which emits noise in such a manner that the level of the noise emitted, when measured at any point outside the boundary of the property upon which the stationary noise source is located using the slow meter characteristic and the A-weighting network of the sound level meter, exceeds the levels set forth in Table I belo...
Vehicle Noise
Vehicle noise in St. Louis is regulated under SLRC Chapter 17 and state RSMo 307.170. Modified exhaust, loud stereos, and engine revving are prohibited. SLMPD Traffic Division actively enforces on Kingshighway, Gravois, and downtown.
Noise: Vehicle Noise
Some RestrictionsRSMo § 307.170
307.170. Other equipment of motor vehicles — violations, penalty. — 1. Signaling devices: Every motor vehicle shall be equipped with a horn, directed forward, or whistle in good working order, capable of emitting a sound adequate in quantity and volume to give warning of the approach of such vehicle to other users of the highway and to pedestrians. Such signaling device shall be used for warnin...