Noise Ordinances in Cass County, MO (2026)
3 rules for unincorporated Cass County, Missouri.
Verified from official government sources
Quiet Hours
Cass County Code § 205.670 makes it an offense to unreasonably and knowingly disturb or alarm another person by loud noise, whether in a public place or on private property. There is no fixed nighttime curfew window; the standard applies at any hour and turns on whether the noise unreasonably disturbs a specific person.
Loud Noise Disturbance in Cass County
Some RestrictionsCass County Code § 205.670
A person commits the offense of peace disturbance if he/she: 1. Unreasonably and knowingly disturbs or alarms another person or persons by: a. Loud noise; or
Decibel Limits
Cass County's Wind Energy Conversion Overlay District ordinance, § 400.391(K)(2), caps wind turbine noise at fifty dBA during daytime and forty dBA at night, measured at the nearest property line, with an overall day-night average not to exceed forty-five dBA Ldn.
Wind Turbine Noise Limit, Cass County
Some RestrictionsCass County Code § 400.391(K)(2)
Noise Management. a. Measurement, Modeling, And Analysis. (1) A noise study shall be conducted to demonstrate that the system does not exceed an adjusted total day-night sound exposure (Ldn) of forty-five (45) dBA measured from the property line. ... b. ... Sound Level. The noise level caused by the operation of the project shall not exceed fifty (50) dBA during any daytime hours and forty (40)...
Vehicle Noise
Cass County Code Section 380.140(B) bans muffler cutouts and requires every motor vehicle to run a properly attached muffler that quiets exhaust noise to the standard of a modern passenger car. Drivers cannot operate a vehicle so that its machinery, motor, signaling device or cargo makes excessive or unnecessary noise on unincorporated county roads.
Muffler and Exhaust Noise Rules in Cass County
Some RestrictionsCass County Code § 380.140(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...
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