Public Water Partners

HINSDALE, WI · Kenosha County

KNOLLS WATER COOPERATIVE Water System

Consumer Confidence Report status

KNOLLS WATER COOPERATIVE 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 KNOLLS WATER COOPERATIVE.

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)
WI2300145
System type
Community Water System
Population served
400
Service connections
293
Ownership
privately owned
Water source
groundwater (wells)

KNOLLS WATER COOPERATIVE is one of 1,289 community water systems in Wisconsin in the 500 or fewer people size category, serving 400 people from groundwater.

As of August 1, 2026, its federal record holds 1 entry in 1994, all of which EPA lists as closed. Nothing has been added since 1994.

All 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 synthetic organic chemicals.

Violation history

  • Monitoring, Regular

    —

    Diquat

    January 1, 1994 – February 28, 1994

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is KNOLLS WATER COOPERATIVE required to publish a Consumer Confidence Report?

Yes. KNOLLS WATER COOPERATIVE 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 KNOLLS WATER COOPERATIVE’s next Consumer Confidence Report due?

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

Does KNOLLS WATER COOPERATIVE have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for KNOLLS WATER COOPERATIVE.

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

SEITH, WILLIAM D - PRESIDENT

Phone not on record

HINSDALE, IL 60521