GREEN LAKE, WI · Green Lake County
GREEN LAKE WATERWORKS Water System
Consumer Confidence Report status
GREEN LAKE 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 GREEN LAKE 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)
- WI4240217
- System type
- Community Water System
- Population served
- 1,002
- Service connections
- 371
- Ownership
- local government
- Water source
- groundwater (wells)
GREEN LAKE WATERWORKS is one of 333 community water systems in Wisconsin in the 501 to 3,300 people size category, serving 1,002 people from groundwater.
As of August 1, 2026, its federal record holds 1 entry in 1991, all of which EPA lists as closed. Nothing has been added since 1991.
None of the 1 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Total Coliform Rules.
Violation history
Maximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
September 1, 1991 – September 30, 1991
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| September 1, 1991 – September 30, 1991 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- December 12, 1991State Public Notification received1 linked violation
- November 14, 1991State Compliance achieved1 linked violation
- November 7, 1991State Formal Notice of Violation issued1 linked violation
- November 7, 1991State Public Notification received1 linked violation
- September 30, 1991State Public Notification requested3 linked violations
Common questions
Is GREEN LAKE WATERWORKS required to publish a Consumer Confidence Report?
- Yes. GREEN LAKE 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 GREEN LAKE WATERWORKS’s next Consumer Confidence Report due?
- GREEN LAKE WATERWORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does GREEN LAKE WATERWORKS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for GREEN LAKE 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
DUGENSKE, BARBARA L - CLERK-TREAS
Phone not on record
GREEN LAKE, WI 54941