Lake Mills Waterworks

Water Quality Snapshot: Lake Mills Waterworks

Lake Mills Waterworks is a local-owned community water system that delivers drinking water to 6,211 residents in Lake Mills, Wisconsin (Jefferson County) through 2,607 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 159 total violations for this system , of which 33 (21%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 95 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 64 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%).

Lake Mills Waterworks's 159 violations sit above the Wisconsin average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.