California Drinking Water Violations
8,328Water Systems
73,699Total Violations
26,750Health-Based
California has 8,328 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 26,750 health-based violations out of 73,699 total violations recorded. Currently, 863 water systems have unresolved health-based violations.
The most frequently cited health-based contaminants in California 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.