Quiet hours in Cook County, IL — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Cook County regulates noise under Chapter 30, Article V of the Code of Ordinances. Noise that is unreasonably loud or disturbs the peace and comfort of residents in unincorporated areas is prohibited, with enhanced enforcement during nighttime hours.
Cook County Code Chapter 30, Article V establishes noise regulations for unincorporated Cook County. The ordinance prohibits the making of any noise that unreasonably disturbs the peace, quiet, and comfort of neighboring inhabitants. The County enforces noise standards through the Department of Environmental Control and local law enforcement. Complaints can be filed with Cook County's non-emergency line. Illinois state law (IEPA Title 35, Part 901) also sets ambient noise standards that apply countywide, establishing maximum allowable sound levels based on land use classification. Residential areas are subject to stricter limits than commercial or industrial zones.
Noise violation: fine of $100 to $1,000 per offense under Cook County Code. Each day of violation constitutes a separate offense.
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See how Cook County's quiet hours rules stack up against other locations.
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