Oklahoma Drinking Water Violations

Oklahoma has 1,280 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 29,030 health-based violations out of 128,124 total violations recorded. Currently, 219 water systems have unresolved health-based violations.

The most frequently cited health-based contaminants in Oklahoma 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.