WAUWATOSA WATERWORKS: EPA violation history, explained

WAUWATOSA WATERWORKS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 49,064, over 18,171 connections.

WAUWATOSA WATERWORKS's record against the rest of the country

5 total violations and 1 health-based ones put WAUWATOSA WATERWORKS at the 33th percentile nationally for violation burden, rank 8,658 of 12,903.

How WAUWATOSA WATERWORKS compares within WI

WI's 202 covered systems average 3.6 health-based violations each; WAUWATOSA WATERWORKS carries 1, not more than typical for the state. The clean-record guide covers what a comparison like this can hide.

Most recent violation on record

The last violation EPA has on record for WAUWATOSA WATERWORKS is from 2012-01-01 (health-based: 1997-01-09). Last reported to EPA: 05/29/2026.

What kind of problem, specifically

WAUWATOSA 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:

• Microbial contamination / treatment technique - flagged from: Coliform (TCR)

The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.

What this data is and is not

WAUWATOSA 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. This record - 1 health-based violation on file for WAUWATOSA WATERWORKS - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.