Noise Ordinances in St. Louis County, MO (2026)

St. Louis County Code §716.073

Sec. 716.073. — It is unlawful to play any radio, musical instrument, television, or music players such as a 'boombox,' tape cassette, or disc player at a volume that disturbs the peace of another person. … It is presumed that if the volume of the offending source is plainly audible to persons more than fifty (50) feet away from the source of the noise, a noise violation exists.

SLCRO Section 625.070(1); Section 625.020(9), (18)

(1)The operation of construction devices, with sound control devices equivalent to or better than the original equipment, used in construction activities during daytime hours. ... (9)Daytime hours: 7:00 o'clock a.m. to 10:00 o'clock p.m., prevailing local time. ... (18)Nighttime hours: 10:00 o'clock p.m., to 7:00 o'clock a.m., prevailing local time.

St. Louis County Code §716.075

A person shall not permit a dog owned by him or within his custody or under his control to habitually bark thereby reasonably causing the peace of any person of ordinary temper and disposition to be disturbed. A dog which habitually barks thereby reasonably causing the peace of any person of ordinary temper and disposition to be disturbed is declared to be a public nuisance.

Section 625.050

No person shall operate or permit to be operated and 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...

SLCRO §§ 625.020(26), 625.070(7)

(26)Stationary noise source: Any equipment, motor vehicle, aircraft, or facility, fixed or movable, capable of emitting audible sound. ... (7)The inflight operation of aircraft, including the pre-takeoff run-up of aircraft engines; provided, however, with the exception of the pre-takeoff run-up of aircraft engines, the provisions of this chapter shall apply to the run-up of aircraft engines, mo...

St. Louis County Revised Ordinances Section 625.050

No person shall operate or permit to be operated and stationary noise source which emits noise...exceeds the levels set forth in Table I below...A. Residential Land Use Category Daytime Hours Tn* (dB(A))** 60 55 or less 30 56-58 15 59-61 8 62-64 4 65-67 2 68-70 0 71 or greater...Nighttime Hours 60 50 or less 30 51-53 15 54-56 8 57-59 4 60-62 2 63-65 0 66 or greater

St. Louis County Code § 716.078

1. It shall be unlawful to operate an all-terrain vehicle (ATV) in the following areas: a.on private property within one hundred (100) feet of another's residential property.b.on a public paved road or a public sidewalk.2.For purposes of this section, "residential property" shall be property which is zoned to permit single or multiple family housing."All-terrain vehicle" (ATV) shall mean any mo...