St. Clair County has no STR-specific noise ordinance. Guests must obey the county nuisance rules, Illinois disorderly-conduct law (720 ILCS 5/26-1), and Illinois Pollution Control Board noise limits (35 Ill. Adm. Code 900). Cities enforce their own noise ordinances.
The county does not publish a dedicated short-term-rental noise rule. Loud parties and disturbances at an unincorporated rental are handled through the county's general nuisance authority and Illinois' disorderly conduct statute (720 ILCS 5/26-1), which covers unreasonable disturbances of the peace. The Illinois Pollution Control Board's numeric noise standards (35 Ill. Adm. Code 900–901) act as a technical backstop. Inside municipalities, the city or village noise ordinance (often with defined quiet hours) applies and is typically enforced by local police. Hosts should set clear quiet-hour expectations for guests to avoid nuisance complaints.
Disorderly conduct is a misdemeanor under 720 ILCS 5/26-1; nuisance noise can draw citations, and repeat disturbances may support enforcement against the property.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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