Illinois Drinking Water Violations
4,747Water Systems
79,997Total Violations
4,530Health-Based
Illinois has 4,747 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 4,530 health-based violations out of 79,997 total violations recorded. Currently, 241 water systems have unresolved health-based violations.
The most frequently cited health-based contaminants in Illinois are Unknown, Unknown, and Unknown. Health-based violations mean a water system exceeded an EPA maximum contaminant level (MCL) or failed required treatment standards.
Browse the counties below to find specific water systems, or search by address or ZIP code to find your water provider.