Quiet hours in Winnebago County, IL — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Winnebago County has no county-wide noise ordinance with fixed quiet hours for unincorporated areas. State law (720 ILCS 5/26-1 disorderly conduct) and Illinois Environmental Protection Act noise rules (35 Ill. Adm. Code Part 900) apply. Rockford and other cities set their own quiet-hour windows.
As a non-home-rule county, Winnebago County has not adopted a stand-alone numeric noise ordinance with set quiet hours for unincorporated areas. The county relies on Illinois state law: 720 ILCS 5/26-1 disorderly conduct (knowingly making any unreasonable or offensive act, gesture, or display that alarms or disturbs another), and the Illinois Pollution Control Board noise regulations at 35 Ill. Adm. Code Parts 900 through 910, which set numeric daytime and nighttime decibel limits at receiving residential property lines (lower limits 10 p.m. to 7 a.m.). The Winnebago County Sheriff's Office responds to disturbance complaints in unincorporated areas. The City of Rockford, Loves Park, Machesney Park, South Beloit, and other municipalities within the county adopt their own noise codes with specific quiet-hour windows that govern within city limits.
Disorderly conduct under 720 ILCS 5/26-1 is a Class C misdemeanor on first offense (up to 30 days jail, $1,500 fine). Repeat or aggravated offenses can rise to Class A misdemeanor or Class 4 felony. Pollution Control Board noise violations carry civil penalties up to $50,000 per violation under 415 ILCS 5/42.
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