What's in MILWAUKEE WATERWORKS's water?
MILWAUKEE WATERWORKS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 626,000 people through 231,851 service connections.
How this compares nationally
Out of 12,903 systems in this dataset, MILWAUKEE WATERWORKS ranks 8,129th by violation burden (37th percentile) - 11 violations total, 1 health-based.
How MILWAUKEE WATERWORKS compares within WI
MILWAUKEE WATERWORKS's 1 health-based violations sit within the WI average of 3.6, across 202 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for MILWAUKEE WATERWORKS is from 2015-01-01 (health-based: 1999-01-09). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
MILWAUKEE 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
This is what MILWAUKEE WATERWORKS reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 11 logged violations can see. The guide to what this data misses covers that gap.