JEFFERSON, WI · Jefferson County
JEFFERSON WATERWORKS Water System
Consumer Confidence Report status
JEFFERSON 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 JEFFERSON 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)
- WI1280104
- System type
- Community Water System
- Population served
- 7,926
- Service connections
- 3,072
- Ownership
- local government
- Water source
- groundwater (wells)
JEFFERSON WATERWORKS is one of 102 community water systems in Wisconsin in the 3,301 to 10,000 people size category, serving 7,926 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 1993 and 2024, all of which EPA lists as closed.
Of the 2, 1 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Lead and Copper Rule and the Total Coliform Rules.
Violation history
Lead Consumer Notice
—Lead and Copper Rule
October 1, 2024 – November 19, 2024
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
September 1, 1993 – September 23, 1993
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2024 – November 19, 2024 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| September 1, 1993 – September 23, 1993 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- October 14, 1993State Public Notification received1 linked violation
- September 23, 1993State Compliance achieved1 linked violation
- September 21, 1993State Violation/Reminder Notice1 linked violation
- September 21, 1993State Public Notification requested1 linked violation
- December 12, 1989State Compliance achievedgeneral compliance action — not tied to a specific violation on record
Common questions
Is JEFFERSON WATERWORKS required to publish a Consumer Confidence Report?
- Yes. JEFFERSON 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 JEFFERSON WATERWORKS’s next Consumer Confidence Report due?
- JEFFERSON WATERWORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does JEFFERSON WATERWORKS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for JEFFERSON 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
COPSEY, SARAH - JEFFERSON CITY CLERK
Phone not on record
JEFFERSON, WI 54549-1772