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

St. Charles County Code § 210.205

It is unlawful for any person to make, continue, or allow to be made or continued, any excessive, unnecessary, unusual or loud noise by use of a public address system which creates a nuisance or injures or endangers the comfort, repose, health or safety of others...Noise measured or registered as provided herein from any source not exempted by this Section at a level which is equal to or in exc...

St. Charles County Code § 205.060

No person shall own, possess, control, keep, or harbor upon any premises a habitually barking dog or other noisy animal. ... "habitually barking dog" means a dog that barks, bays, cries, howls, or makes any noise for an extended period of time to the disturbance of any person at any time of day or night... An "extended period of time" means incessant noise for thirty (30) minutes or more in any...

St. Charles County Code § 250.160

Certain Sound Sources Prohibited. No person shall operate or play any musical instrument, radio, stereo, mechanical record or tape player, loudspeaker, public address system or sound amplifying equipment of any kind within the boundaries of any County park in such a manner as to cause the sound emanating therefrom to exceed a loudness of seventy-five (75) decibels for ten (10) minutes from a di...

St. Charles County Code § 210.205

Noise measured or registered as provided herein from any source not exempted by this Section at a level which is equal to or in excess of the dB(A) established for the time period and zones listed below is declared to be excessive, unusual, loud and unnecessary: ... Light industrial 55 dB(A) / 50 dB(A) ... Industrial 60 dB(A) / 55 dB(A) ... the aforementioned zones shall be defined as set forth...

Section 307.170(B)

Muffler Cutouts. Muffler cutouts shall not be used and no vehicle shall be driven in such manner or condition that excessive and unnecessary noises shall be made by its machinery, motor, signaling device, or other parts, or by any improperly loaded cargo. The motors of all motor vehicles shall be fitted with properly attached mufflers of such capacity or construction as to quiet the maximum pos...