Industrial noise in Cook County is regulated by Chapter 30, Article V and Illinois EPA Title 35, Part 901. Industrial sources (Class C land) emitting noise into residential areas must meet 61 dBA daytime and 51 dBA nighttime limits.
Cook County Code Chapter 30, Article V and Illinois EPA regulations (35 IAC Part 901) govern industrial noise. Class C land (industrial) emitting noise received by Class A land (residential) must not exceed 61 dBA daytime (7 AM–10 PM) or 51 dBA nighttime (10 PM–7 AM). The Cook County Zoning Ordinance (Ord. 01-O-30) establishes buffer zones between industrial and residential districts. The Department of Building and Zoning enforces zoning compliance, while IEPA handles emissions standards. Complaints about industrial noise in unincorporated areas can be filed with the Cook County Department of Environmental Control.
Industrial noise exceeding state limits: IEPA enforcement action. County zoning violation: $100–$1,000 fine per offense. Each day is a separate offense.
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See how Cook County's industrial noise rules stack up against other locations.
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