THIENSVILLE, WI · Ozaukee County

CENTURY ESTATES 3 Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of October 21, 2011. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Ozaukee County, WI.

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): WI2460135
System type: Community Water System
Population served: 300
Service connections: 87
Ownership: privately owned
Water source: groundwater (wells)

CENTURY ESTATES 3 is one of 1,289 community water systems in Wisconsin in the 500 or fewer people size category, formerly serving 300 people from groundwater.

EPA's federal records list this system as inactive in 2011; the record below is historical.

As of August 1, 2026, its federal record holds 34 entries between 1994 and 2009, all of which EPA lists as closed. Nothing has been added since 2009.

Of the 34, 27 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, inorganic chemicals, and the Public Notice Rule and Revised PN Rule.

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2009 – June 29, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2008 – June 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2008 – March 31, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2007 – December 31, 2007
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 2, 2007 – August 6, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2007 – March 31, 2007
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
December 13, 2006 – March 22, 2007
Resolved
Monitoring, Regular
—
LASSO
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Heptachlor
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
2,4,5-TP
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Chlordane
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Simazine
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Dinoseb
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Aldicarb sulfone
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Carbofuran
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Aldicarb
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Atrazine
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
LASSO
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Heptachlor
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Heptachlor epoxide
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Pentachlorophenol
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Chlordane
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Endrin
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
BHC-GAMMA
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Methoxychlor
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Toxaphene
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Dalapon
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Aldicarb
January 1, 1994 – March 31, 1994
Archived
Monitoring, Regular
—
Atrazine
January 1, 1994 – March 31, 1994
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2009 – June 29, 2009	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2008 – March 31, 2008	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2007 – December 31, 2007	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 2, 2007 – August 6, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2007 – March 31, 2007	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
December 13, 2006 – March 22, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 1994 – March 31, 1994	Monitoring, Regular	LASSO	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Heptachlor	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	2,4,5-TP	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Chlordane	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Simazine	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Dinoseb	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Aldicarb sulfoxide	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Aldicarb sulfone	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Carbofuran	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Aldicarb	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Atrazine	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	LASSO	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Heptachlor	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Heptachlor epoxide	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	HEXACHLOROBENZENE	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Pentachlorophenol	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Chlordane	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Endrin	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	BHC-GAMMA	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Methoxychlor	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Toxaphene	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Dalapon	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Aldicarb sulfoxide	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Aldicarb	—	Archived
January 1, 1994 – March 31, 1994	Monitoring, Regular	Atrazine	—	Archived

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

Enforcement actions

October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Public Notification issued1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 11, 2011State Violation/Reminder Notice1 linked violation
October 11, 2011State Public Notification requested1 linked violation
October 10, 2011State Administrative/Compliance Order without penalty issued1 linked violation
October 10, 2011State Administrative/Compliance Order without penalty issued1 linked violation
October 10, 2011State Administrative/Compliance Order without penalty issued1 linked violation
August 9, 2011State Public Notification issued3 linked violations
August 4, 2011State Public Notification requested3 linked violations
August 1, 2011State Administrative/Compliance Order without penalty issued3 linked violations
August 1, 2011State Administrative/Compliance Order without penalty issued3 linked violations
June 23, 2011State Other1 linked violation
June 20, 2011State Other3 linked violations
May 18, 2011State Administrative/Compliance Order without penalty issued24 linked violations
April 26, 2011State Public Notification received3 linked violations
April 26, 2011State Violation/Reminder Notice6 linked violations
February 21, 2011State Administrative/Compliance Order without penalty issued9 linked violations
November 11, 2010State Public Notification requested65 linked violations
November 11, 2010State Violation/Reminder Notice1 linked violation
November 11, 2010State Public Notification requested4 linked violations
September 13, 2010State Public Notification issued28 linked violations
September 2, 2010State Public Notification received1 linked violation
May 19, 2010State Other2 linked violations
May 12, 2010State Administrative/Compliance Order without penalty issued1 linked violation
May 12, 2010State Public Notification received8 linked violations
May 12, 2010State Public Notification issued2 linked violations
May 12, 2010State Other6 linked violations
May 12, 2010State Violation/Reminder Notice2 linked violations
March 16, 2010State Administrative/Compliance Order without penalty issued2 linked violations
March 16, 2010State Other21 linked violations
September 25, 2009State Public Notification issued6 linked violations
September 25, 2009State Public Notification issued11 linked violations
June 29, 2009State Compliance achieved7 linked violations
March 27, 2009State Public Notification issued2 linked violations
December 9, 2008State Public Notification issued2 linked violations
December 9, 2008State Public Notification issued2 linked violations
December 9, 2008State Compliance Meeting conducted3 linked violations
December 9, 2008State Public Notification received2 linked violations
December 9, 2008State Administrative/Compliance Order without penalty issued3 linked violations
December 9, 2008State Other2 linked violations
December 9, 2008State Compliance Meeting conducted15 linked violations
October 21, 2008State Public Notification received12 linked violations
October 21, 2008State Administrative/Compliance Order without penalty issued2 linked violations
July 15, 2008State Public Notification issued44 linked violations
July 10, 2008State Compliance Meeting conducted23 linked violations
June 25, 2008State Violation/Reminder Notice4 linked violations
June 25, 2008State Public Notification issued34 linked violations
March 25, 2008State Public Notification issued25 linked violations
March 25, 2008State Public Notification issued18 linked violations
February 8, 2008State Violation/Reminder Notice9 linked violations
November 8, 2007State Other3 linked violations
October 31, 2007State Other3 linked violations
August 6, 2007State Public Notification received3 linked violations
July 10, 2007State Administrative/Compliance Order without penalty issued3 linked violations
June 28, 2007State Other2 linked violations
April 2, 2007State Violation/Reminder Notice5 linked violations
July 25, 1994State Public Notification received1 linked violation
June 10, 1994State Public Notification requested1 linked violation
May 30, 1994State Compliance achieved2 linked violations

Last known contact on file (system is inactive)

MATHWIG, SCOTT

Phone not on record

THIENSVILLE, WI 53092