OAK CREEK WATERWORKS: EPA violation history, explained
OAK CREEK WATERWORKS had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 32,104, over 11,890 connections.
OAK CREEK WATERWORKS's record against the rest of the country
OAK CREEK WATERWORKS has 58 violations on record in total, 5 of thems health-based - ranking it 3,425th of 12,903 systems by violation count, the 73th percentile nationally.
How OAK CREEK WATERWORKS compares within WI
OAK CREEK WATERWORKS's 5 health-based violations sit above the WI average of 3.6, across 202 systems statewide. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for OAK CREEK WATERWORKS is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
OAK CREEK WATERWORKS's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Lead & copper - flagged from: LEAD AND COPPER RULE REVISIONS
- Disinfection byproducts - flagged from: TTHM
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
OAK CREEK WATERWORKS's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 58 logged violations can see. The guide to what this data misses covers that gap.