Public Water Partners

COTTAGE GROVE, WI · Dane County

COTTAGE GROVE WATERWORKS Water System

Consumer Confidence Report status

COTTAGE GROVE 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 COTTAGE GROVE 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)
WI1130218
System type
Community Water System
Population served
9,345
Service connections
3,461
Ownership
local government
Water source
groundwater (wells)

COTTAGE GROVE WATERWORKS is one of 102 community water systems in Wisconsin in the 3,301 to 10,000 people size category, serving 9,345 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, Acute (TCR)

    Health-based

    Coliform (TCR)

    September 1, 1991 – September 30, 1991

    Archived

Archived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Common questions

Is COTTAGE GROVE WATERWORKS required to publish a Consumer Confidence Report?

Yes. COTTAGE GROVE 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 COTTAGE GROVE WATERWORKS’s next Consumer Confidence Report due?

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

Does COTTAGE GROVE WATERWORKS have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for COTTAGE GROVE 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

O'LOUGHLIN, KYELA - PUBLIC WORKS AND UTILITIES DIR

Phone not on record

COTTAGE GROVE, WI 53527-0156