Rock County has no countywide outdoor-music ordinance. Cities and towns control it through nuisance rules and event permits. In Janesville, loud or raucous outdoor amplified sound in public places is barred under 9.42.020.
Outdoor music at homes, bars, and events is regulated locally, not by Rock County. Janesville's section 9.42.020 prohibits loud or raucous amplified noise in public streets, parks, and other public places and bars 'unnecessary and annoying noise' generally, which reaches backyard bands and patio speakers. Festivals or amplified public events in a city typically need a separate permit or license from the municipality. Beloit and the towns use their own nuisance sections. County parks fall under county park hours and quiet rules. Egregious outdoor-music disturbances can be charged as disorderly conduct under Wis. Stat. 947.01.
Janesville nuisance forfeitures run roughly $25 to $500 plus costs. Unpermitted amplified events may also face permit-violation penalties from the city, and severe disturbances can be a Class B misdemeanor.
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Janesville, WI
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