Is COLOMA WATERWORKS required to publish a Consumer Confidence Report?

Yes. COLOMA 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 COLOMA WATERWORKS’s next Consumer Confidence Report due?

COLOMA WATERWORKS’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.

COLOMA, WI · Waushara County

COLOMA WATERWORKS Water System

Consumer Confidence Report status

COLOMA 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 COLOMA 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): WI4700265
System type: Community Water System
Population served: 454
Service connections: 168
Ownership: local government
Water source: groundwater (wells)

COLOMA WATERWORKS is one of 1,289 community water systems in Wisconsin in the 500 or fewer people size category, serving 454 people from groundwater.

As of August 1, 2026, its federal record holds 7 entries between 1992 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.

Of the 7, 4 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 Stage 2 Disinfectants and Disinfection Byproducts Rule, the Consumer Confidence Rule, and the Lead and Copper Rule.

Violation history

Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2020 – December 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2016 – December 31, 2016
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – July 26, 2012
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2012 – October 6, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2011 – September 8, 2011
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
September 1, 1992 – September 30, 1992
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2012 – July 26, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2012 – October 6, 2014	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2011 – September 8, 2011	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 1992 – September 30, 1992	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

August 3, 2021State Compliance achieved3 linked violations
May 27, 2021State Public Notification received2 linked violations
January 8, 2021State Violation/Reminder Notice2 linked violations
January 8, 2021State Public Notification requested2 linked violations
February 29, 2012State Other6 linked violations
September 30, 1993State Compliance achieved1 linked violation
August 30, 1993State Violation/Reminder Notice1 linked violation
August 30, 1993State Public Notification requested1 linked violation
August 30, 1993State Boil Water Order1 linked violation
January 19, 1993State Public Notification requested2 linked violations
January 19, 1993State Violation/Reminder Notice1 linked violation
October 29, 1992State Compliance achieved1 linked violation

Common questions

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

COLOMA VIL CLERK - BRENDA WALKER

Phone not on record

COLOMA, WI 54930-0353