Mosinee Waterworks, WI Water Quality
Mosinee Waterworks: EPA violation history, explained
Mosinee 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: 3,406, over 1,783 connections.
Mosinee Waterworks's record against the rest of the country
9 total violations and 2 health-based ones put Mosinee Waterworks at the 49th percentile nationally for violation burden, rank 6,606 of 12,903.
How Mosinee Waterworks compares within WI
Among the 259 WI systems in this dataset, the average is 5.4 health-based violations - Mosinee Waterworks's 2 is at or below that. 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 Mosinee Waterworks is from 2017-01-07 (health-based: 2013-01-04). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
Mosinee 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
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
Everything on this page is Mosinee Waterworks's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 9 logged violations can see. The guide to what this data misses covers that gap.