Is WINDSOR ESTATES required to publish a Consumer Confidence Report?

Yes. WINDSOR ESTATES 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 WINDSOR ESTATES’s next Consumer Confidence Report due?

WINDSOR ESTATES’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.

LINCOLN, MT · Yellowstone County

WINDSOR ESTATES Water System

Consumer Confidence Report status

WINDSOR ESTATES 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 WINDSOR ESTATES.

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 Montana’s official records. Always confirm current status with Montana before making decisions based on this information.

System facts

System ID (PWSID): MT0003807
System type: Community Water System
Population served: 530
Service connections: 213
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

WINDSOR ESTATES is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 530 people from surface water.

As of August 1, 2026, its federal record holds 45 entries between 1995 and 2022, all of which EPA lists as closed. Nothing has been added since 2022.

Of the 45, 41 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 Lead and Copper Rule, the Stage 2 Disinfectants and Disinfection Byproducts Rule, and the Total Coliform Rules.

Violation history

Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2022 – December 31, 2022
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2017 – December 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2017 – December 31, 2017
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2015 – December 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2015 – December 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2015 – June 30, 2015
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2015 – June 30, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
August 1, 2014 – August 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
August 1, 2014 – August 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2014 – March 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2014 – March 31, 2014
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2014 – December 30, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – July 22, 2013
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2012 – May 4, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – November 18, 2012
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2011 – December 30, 2019
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – December 31, 2013
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – May 2, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2005 – November 30, 2005
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2004 – September 29, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2004 – October 31, 2004
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2003 – February 21, 2006
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2002 – September 29, 2006
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
October 1, 2000 – January 30, 2004
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1998 – May 31, 1998
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1998 – March 1, 2001
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1997 – December 31, 2000
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1996 – December 31, 2000
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1995 – July 31, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1995 – June 30, 1995
Resolved

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
October 1, 2022 – December 31, 2022	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2017 – December 31, 2017	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2017 – December 31, 2017	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2015 – December 31, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2015 – December 31, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2015 – June 30, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2015 – June 30, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
August 1, 2014 – August 31, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
August 1, 2014 – August 31, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2014 – March 31, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2014 – March 31, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2014 – December 30, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2013 – July 22, 2013	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2012 – May 4, 2018	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2012 – November 18, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2011 – December 30, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Asbestos	—	Archived
July 1, 2006 – May 2, 2007	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
November 1, 2005 – November 30, 2005	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2004 – September 29, 2006	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2004 – October 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2003 – February 21, 2006	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2002 – September 29, 2006	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
October 1, 2000 – January 30, 2004	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
May 1, 1998 – May 31, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1998 – March 1, 2001	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 1997 – December 31, 2000	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 1996 – December 31, 2000	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 1995 – July 31, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 1995 – June 30, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

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

Enforcement actions

February 8, 2023State Compliance achieved1 linked violation
January 20, 2023State Violation/Reminder Notice1 linked violation
January 20, 2023State Public Notification requested1 linked violation
December 30, 2019State Compliance achieved1 linked violation
December 30, 2019State Compliance achieved1 linked violation
September 20, 2018State Compliance achieved2 linked violations
May 4, 2018State Compliance achieved1 linked violation
October 18, 2017State Violation/Reminder Notice2 linked violations
October 18, 2017State Public Notification requested2 linked violations
February 21, 2016State Compliance achieved2 linked violations
January 19, 2016State Public Notification requested2 linked violations
January 19, 2016State Violation/Reminder Notice2 linked violations
August 16, 2015State Compliance achieved2 linked violations
July 16, 2015State Public Notification requested2 linked violations
July 16, 2015State Violation/Reminder Notice2 linked violations
December 4, 2014State Compliance achieved2 linked violations
November 5, 2014State Violation/Reminder Notice2 linked violations
November 5, 2014State Public Notification requested2 linked violations
May 16, 2014State Compliance achieved2 linked violations
April 16, 2014State Public Notification requested2 linked violations
April 16, 2014State Violation/Reminder Notice2 linked violations
January 24, 2014State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
January 23, 2014State Violation/Reminder Notice1 linked violation
July 22, 2013State Compliance achieved1 linked violation
July 16, 2013State Violation/Reminder Notice1 linked violation
November 18, 2012State Compliance achieved1 linked violation
November 14, 2012State Violation/Reminder Notice1 linked violation
February 15, 2011State Violation/Reminder Notice1 linked violation
May 15, 2009State Compliance achieved1 linked violation
May 2, 2007State Compliance achieved1 linked violation
February 5, 2007State Violation/Reminder Notice1 linked violation
September 29, 2006State Compliance achieved2 linked violations
September 29, 2006State Compliance achieved1 linked violation
September 29, 2006State Compliance achieved1 linked violation
February 21, 2006State Compliance achieved1 linked violation
December 26, 2005State Public Notification requested1 linked violation
December 26, 2005State Violation/Reminder Notice1 linked violation
January 11, 2005State Public Notification received1 linked violation
January 4, 2005State Public Notification requested1 linked violation
January 4, 2005State Public Notification requested2 linked violations
January 4, 2005State Violation/Reminder Notice1 linked violation
January 4, 2005State Violation/Reminder Notice2 linked violations
January 3, 2005State Public Notification requested5 linked violations
January 3, 2005State Public Notification requested5 linked violations
January 3, 2005State Violation/Reminder Notice5 linked violations
December 30, 2004State Public Notification requested1 linked violation
December 30, 2004State Violation/Reminder Notice1 linked violation
January 30, 2004State Compliance achieved1 linked violation
December 31, 2001State Compliance achieved16 linked violations
March 1, 2001State Compliance achieved1 linked violation
December 31, 2000State Formal Notice of Violation issued4 linked violations
December 31, 2000State Other1 linked violation
December 31, 2000State Compliance achieved3 linked violations
September 10, 1998State Other1 linked violation
June 17, 1998State Compliance achieved3 linked violations
April 23, 1998State Formal Notice of Violation issued1 linked violation

Common questions

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

WILSON, JOSEPH E

406-209-1699

LINCOLN, MT 59639-0476