EDGERTON, WI · Rock County
OAKHILL WATERWORKS Water System
Consumer Confidence Report status
OAKHILL 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 OAKHILL 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)
- WI1540116
- System type
- Community Water System
- Population served
- 130
- Service connections
- 45
- Ownership
- privately owned
- Water source
- groundwater (wells)
OAKHILL WATERWORKS is one of 1,289 community water systems in Wisconsin in the 500 or fewer people size category, serving 130 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries in 1993, all of which EPA lists as closed. Nothing has been added since 1993.
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 Total Coliform Rules and inorganic chemicals.
Violation history
Maximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
August 1, 1993 – August 31, 1993
ResolvedMonitoring, Regular
—Nitrate
January 1, 1993 – December 31, 1993
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| August 1, 1993 – August 31, 1993 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
| January 1, 1993 – December 31, 1993 | Monitoring, Regular | Nitrate | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- October 1, 1993State Public Notification received1 linked violation
- September 29, 1993State Public Notification received1 linked violation
- September 23, 1993State Compliance achieved1 linked violation
- September 9, 1993State Boil Water Order1 linked violation
- September 8, 1993State Violation/Reminder Notice1 linked violation
- September 8, 1993State Public Notification requested1 linked violation
Common questions
Is OAKHILL WATERWORKS required to publish a Consumer Confidence Report?
- Yes. OAKHILL 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 OAKHILL WATERWORKS’s next Consumer Confidence Report due?
- OAKHILL WATERWORKS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OAKHILL WATERWORKS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for OAKHILL 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
SCHULTZ, TED
Phone not on record
EDGERTON, WI 53534