MIDDLETON, WI · Waukesha County

KNOLLCREST Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): WI2681104
System type: Community Water System
Population served: 66
Service connections: 52
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 1991 – December 31, 1991
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
December 1, 1991 – December 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

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

Enforcement actions

March 23, 2022State Public Notification received5 linked violations
December 9, 2021State Compliance Meeting conducted2 linked violations
September 23, 2021State Public Notification received1 linked violation
September 17, 2021State Public Notification requested1 linked violation
March 1, 2021State Violation/Reminder Notice2 linked violations
March 1, 2021State Compliance achieved1 linked violation
April 4, 2011State Public Notification received32 linked violations
December 1, 2010State Public Notification issued55 linked violations
June 11, 2001State Compliance achieved88 linked violations
May 10, 2000State Compliance Meeting conducted47 linked violations
January 30, 1992State Public Notification requested8 linked violations

Contact

TAPP, RODNEY - MERIDIAN GROUP PRESIDENT

Phone not on record

MIDDLETON, WI 53562