Waukegan, IL Public Conduct: Loud Party Ordinance (2026)

Section 3-50 targets whoever "permits, allows, hosts, or fails to take reasonable steps to prevent" a gathering of three or more people at a residence, other private property, a public place, or any premises under that person's control where illicit drugs are consumed or where anyone under 21 drinks alcohol, so long as the host knew or reasonably should have known it was happening. The ordinance builds in two presumptions that make it easier for the city to prove a violation: a host is deemed to have known if reasonable steps like checking IDs, limiting the alcohol on hand, or supervising minors weren't taken, and a host who was simply present when the drinking or drug use occurred is rebuttably presumed to have known about it.

Liability doesn't require the host to be on scene, and it survives even if the gathering happens while the homeowner is away, unless the owner both advised law enforcement in advance that the residence would be unsupervised and confirmed no underage drinking was authorized. Two narrow defenses exist: a host who calls police to remove someone violating the rules, or who shuts the gathering down once reasonable steps have failed, before anyone else complains to police, is not in violation. The section exempts alcohol use at a bona fide religious ceremony and use exclusively between an underage person and that person's own parent or legal guardian as allowed under Illinois law.