Is OAKTON BEACH required to publish a Consumer Confidence Report?

Yes. OAKTON BEACH 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 OAKTON BEACH’s next Consumer Confidence Report due?

OAKTON BEACH’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

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.

HALES CORNERS, WI · Waukesha County

OAKTON BEACH Water System

Consumer Confidence Report status

OAKTON BEACH 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 OAKTON BEACH.

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): WI2681086
System type: Community Water System
Population served: 144
Service connections: 9
Ownership: privately owned
Water source: groundwater (wells)

OAKTON BEACH is one of 1,289 community water systems in Wisconsin in the 500 or fewer people size category, serving 144 people from groundwater.

As of August 1, 2026, its federal record holds 15 entries between 1991 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 15, 10 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, inorganic chemicals, and the Consumer Confidence Rule.

Violation history

Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2023 – December 31, 2025
Archived
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2013 – October 22, 2013
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2006 – August 14, 2006
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
October 19, 1999 – August 17, 2000
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Regular
—
Arsenic
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Regular
—
Nickel
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
September 1, 1994 – September 30, 1994
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
April 1, 1994 – April 30, 1994
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 1994 – April 30, 1994
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 1994 – February 28, 1994
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1992 – November 30, 1992
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1992 – January 31, 1992
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1991 – September 30, 1991
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1991 – August 31, 1991
Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2023 – December 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
October 1, 2013 – October 22, 2013	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
August 1, 2006 – August 14, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 19, 1999 – August 17, 2000	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Arsenic	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Nickel	—	Resolved
September 1, 1994 – September 30, 1994	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 1994 – April 30, 1994	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
April 1, 1994 – April 30, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
February 1, 1994 – February 28, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
November 1, 1992 – November 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1992 – January 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 1991 – September 30, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
August 1, 1991 – August 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

August 7, 2006State Public Notification requested11 linked violations
January 9, 2005State Compliance achieved8 linked violations
July 20, 1999Federal issued Formal Notice of Violation5 linked violations
July 2, 1996State Compliance achieved12 linked violations
May 31, 1994State Compliance achieved1 linked violation
April 27, 1994State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
April 18, 1994State Public Notification requested2 linked violations
April 18, 1994State Formal Notice of Violation issued2 linked violations
March 24, 1994State Public Notification received1 linked violation
March 11, 1994State Public Notification received1 linked violation
March 9, 1994State Public Notification requested2 linked violations
March 2, 1994State Violation/Reminder Notice1 linked violation
March 2, 1994State Public Notification requested1 linked violation
January 25, 1994State Public Notification received1 linked violation
October 28, 1993State Public Notification requested1 linked violation
September 30, 1993State Compliance achieved1 linked violation
February 18, 1993State Violation/Reminder Notice1 linked violation
February 18, 1993State Public Notification requested1 linked violation
December 30, 1992State Compliance achieved1 linked violation
February 25, 1992State Formal Notice of Violation issued4 linked violations

Common questions

Is OAKTON BEACH required to publish a Consumer Confidence Report?: Yes. OAKTON BEACH 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 OAKTON BEACH’s next Consumer Confidence Report due?: OAKTON BEACH’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OAKTON BEACH have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for OAKTON BEACH.
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

WIMMER COMMUNITIES LLC - C/O JOHN J. WIMMER

Phone not on record

HALES CORNERS, WI 53130