Noise from Specific Sources in St. Louis County, MO (2026)
2 county-level rules, plus city-specific rules for 1 city in St. Louis County, Missouri.
Verified from official government sources
Delivery Truck Noise
St. Louis County's traffic code doesn't wait for a decibel meter to stop a loud delivery truck: Section 1217.010 bans muffler cutouts on any vehicle, requires every motor to run on a muffler sized to quiet 'the maximum possible exhaust noise,' and separately bars driving so that 'excessive and unnecessary noises' come from a truck's machinery, motor or improperly loaded cargo.
St. Louis County Truck Exhaust Noise Ban
Some RestrictionsSt. Louis County Code § 1217.010
Muffler cutouts shall not be used upon any vehicle. The motors of all vehicles shall be fitted with properly attached mufflers of such capacity or construction as to quiet the maximum possible exhaust noise. Any cutout or opening in the exhaust pipe between the motor and the muffler on any motor vehicle shall be completely closed and disconnected from its operating lever and shall be arranged s...
Low-Frequency Bass Limits
St. Louis County's Noise Control Code bans vibration, not just audible sound, from crossing onto a neighbor's property. Section 625.060 makes it unlawful to cause any operation or activity that generates vibration above the human perception threshold at the property line, a standard the Department of Community Health and Medical Care applies to bass-heavy stereo systems, subwoofers and mechanical equipment alike.
Low-Frequency Bass Vibration Limits in St. Louis County
Some RestrictionsSLCRO §§ 625.020(19), 625.060
Perception threshold: The minimum vibrational motion necessary to cause awareness of the existence of the vibration by direct means, including but not limited to, sensation by touch or visual observations. Any vibration which produces more than five-tenths (0.5) inch/second root mean square vertical velocity shall be deemed sufficient to cause the awareness of the existence of the vibration by ...
Noise from Specific Sources by City in St. Louis County
1 cities in St. Louis County have their own noise from specific sources rules. Each link goes to that city's dedicated page with code citations.
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