MONONA WATERWORKS: EPA violation history, explained
MONONA 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 8,624 people through 3,194 service connections.
MONONA WATERWORKS's record against the rest of the country
Out of 12,903 systems in this dataset, MONONA WATERWORKS ranks 8,717th by violation burden (32th percentile) - 5 violations total, 1 health-based.
How MONONA WATERWORKS compares within WI
MONONA 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 MONONA WATERWORKS is from 2007-01-09 (health-based: 1991-11-06). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
MONONA 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 MONONA 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 5 logged violations can see. The guide to what this data misses covers that gap.