Quiet hours in Brown County, WI — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Brown County Code Chapter 39 (revised 5-1-2002) sets daytime and nighttime sound pressure limits for unincorporated areas. Nighttime amplified sound from commercial/industrial zones audible 75 feet beyond the lot line into a residential zone is prohibited.
Chapter 39 establishes 'Maximum Permissible Sound Pressure' tables for daytime and nighttime hours by zoning district and applies to unincorporated towns under county zoning. The Brown County Board of Health may grant a conditional variance if it finds the variance promotes a public interest with minimal harm to public health, safety and welfare. Variance applications must be submitted in writing to the Health Director at least 30 days before sound-producing operations begin. Cities and villages (Green Bay, De Pere, Ashwaubenon, Howard, etc.) operate under their own municipal noise codes — De Pere Chapter 146 governs De Pere; Green Bay's Chapter 30 covers the city. Wis. Stat. §947.01 (disorderly conduct) is also available to law enforcement for unreasonably loud conduct that tends to provoke a disturbance.
County Chapter 39 violations are typically enforced by citation through the Brown County Sheriff's Office or Health Department. Disorderly conduct under Wis. Stat. §947.01 is a Class B misdemeanor (up to 90 days jail and/or $1,000 fine).
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