LAKE MILLS, WI · Jefferson County
LAKE MILLS WATERWORKS Water System
Consumer Confidence Report status
LAKE MILLS WATERWORKS must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for LAKE MILLS WATERWORKS.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Wisconsin’s official records. Always confirm current status with Wisconsin before making decisions based on this information.
System facts
- System ID (PWSID)
- WI1280108
- System type
- Community Water System
- Population served
- 6,211
- Service connections
- 2,607
- Ownership
- local government
- Water source
- groundwater (wells)
LAKE MILLS WATERWORKS is one of 102 community water systems in Wisconsin in the 3,301 to 10,000 people size category, serving 6,211 people from groundwater.
As of August 1, 2026, EPA's published records contain no violations for this system.
Violation history
No violations on record for this system.
Enforcement actions
- November 1, 2022State Public Notification received32 linked violations
- June 7, 2018State Public Notification received17 linked violations
- March 13, 2018State Other18 linked violations
- June 30, 2017State Compliance achieved22 linked violations
- February 13, 2017State Formal Notice of Violation issued19 linked violations
Common questions
Is LAKE MILLS WATERWORKS required to publish a Consumer Confidence Report?
- Yes. LAKE MILLS WATERWORKS is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is LAKE MILLS WATERWORKS’s next Consumer Confidence Report due?
- LAKE MILLS WATERWORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does LAKE MILLS WATERWORKS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for LAKE MILLS WATERWORKS.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
QUEST, MISTY - LAKE MILLS CITY CLERK
Phone not on record
LAKE MILLS, WI 53551-1632