WILSALL, MT · Park County

WILSALL WATER DISTRICT Water System

Current status

1 open health-based violation on record as of July 4, 2026. See the violation history below for contaminant and status details.

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

System facts

System ID (PWSID): MT0000362
System type: Community Water System
Population served: 250
Service connections: 130
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2025 – October 31, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2025 – September 30, 2025
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2025 – September 30, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2025 – August 31, 2025
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
October 3, 2019
Addressed
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
April 1, 2018 – January 17, 2018
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2013 – September 30, 2013
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2013 – September 30, 2013
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2011 – April 12, 2011
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – December 31, 2013
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2010 – November 3, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – November 3, 2010
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2008 – December 31, 2008
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2008 – November 4, 2008
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2008 – December 31, 2008
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2008 – June 30, 2008
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2007 – July 31, 2008
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2004 – June 7, 2004
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2004 – December 31, 2004
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
October 1, 2003 – December 31, 2003
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2003 – December 31, 2003
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2003 – June 30, 2003
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2003 – March 31, 2003
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2002 – December 31, 2002
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
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
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2000 – June 30, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2000 – June 30, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2000 – June 30, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2000 – June 30, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2000 – June 30, 2000
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 1995 – October 31, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1994 – June 30, 1994
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
April 1, 1994 – April 30, 1994
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 1994 – February 28, 1994
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 1993 – December 31, 1993
Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmation

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2025 – October 31, 2025	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2025 – September 30, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2025 – September 30, 2025	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2025 – August 31, 2025	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 3, 2019	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Addressed
April 1, 2018 – January 17, 2018	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
July 1, 2013 – September 30, 2013	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2013 – September 30, 2013	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2011 – April 12, 2011	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Asbestos	—	Resolved
October 1, 2010 – November 3, 2010	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2010 – November 3, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2008 – November 4, 2008	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2008 – June 30, 2008	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2007 – July 31, 2008	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2004 – June 7, 2004	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2003 – December 31, 2003	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
July 1, 2003 – December 31, 2003	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2003 – June 30, 2003	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2003 – March 31, 2003	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
July 1, 2002 – December 31, 2002	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
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
January 1, 2000 – June 30, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2000 – June 30, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2000 – June 30, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2000 – June 30, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2000 – June 30, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
October 1, 1995 – October 31, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 1994 – June 30, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 1994 – April 30, 1994	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 1994 – February 28, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1993 – December 31, 1993	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmation

Enforcement actions

November 6, 2025State Violation/Reminder Notice1 linked violation
November 6, 2025State Compliance achieved1 linked violation
November 6, 2025State Public Notification requested1 linked violation
November 6, 2025State Compliance achieved1 linked violation
November 6, 2025State Public Notification requested1 linked violation
November 6, 2025State Violation/Reminder Notice1 linked violation
November 6, 2025State Compliance achieved1 linked violation
November 6, 2025State Public Notification requested1 linked violation
November 6, 2025State Violation/Reminder Notice1 linked violation
November 6, 2025State Compliance achieved1 linked violation
November 6, 2025State Public Notification requested1 linked violation
November 6, 2025State Violation/Reminder Notice1 linked violation
August 26, 2020State Administrative/Compliance Order without penalty issued1 linked violation
June 17, 2020State Other1 linked violation
October 3, 2019State Public Notification requested1 linked violation
October 3, 2019State Compliance achieved1 linked violation
October 3, 2019State Violation/Reminder Notice1 linked violation
May 2, 2018State Public Notification requested1 linked violation
May 2, 2018State Violation/Reminder Notice1 linked violation
January 17, 2018State Compliance achieved1 linked violation
August 12, 2014State Compliance achieved1 linked violation
August 12, 2014State Compliance achieved2 linked violations
July 7, 2014State Public Notification received2 linked violations
January 24, 2014State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
December 31, 2013State Intentional no-action2 linked violations
October 15, 2013State Violation/Reminder Notice2 linked violations
October 15, 2013State Public Notification requested2 linked violations
April 12, 2011State Compliance achieved1 linked violation
February 15, 2011State Violation/Reminder Notice1 linked violation
November 3, 2010State Compliance achieved2 linked violations
October 23, 2010State Public Notification requested1 linked violation
October 23, 2010State Violation/Reminder Notice1 linked violation
August 7, 2010State Violation/Reminder Notice1 linked violation
August 7, 2010State Public Notification requested1 linked violation
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved3 linked violations
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved2 linked violations
May 15, 2009State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved1 linked violation
March 18, 2009State Public Notification received2 linked violations
February 2, 2009State Public Notification requested2 linked violations
February 2, 2009State Violation/Reminder Notice2 linked violations
November 4, 2008State Compliance achieved2 linked violations
August 5, 2008State Violation/Reminder Notice1 linked violation
August 5, 2008State Public Notification requested1 linked violation
August 3, 2008State Public Notification requested1 linked violation
August 3, 2008State Violation/Reminder Notice1 linked violation
July 31, 2008State Compliance achieved1 linked violation
January 15, 2008State Violation/Reminder Notice1 linked violation
January 15, 2008State Public Notification requested1 linked violation
October 10, 2007State Compliance achieved20 linked violations
December 18, 2006State Compliance achieved3 linked violations
April 4, 2006State Compliance achieved2 linked violations
February 24, 2005State Violation/Reminder Notice2 linked violations
February 24, 2005State Public Notification requested2 linked violations
January 4, 2005State Violation/Reminder Notice1 linked violation
January 4, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice1 linked violation
January 3, 2005State Violation/Reminder Notice1 linked violation
January 3, 2005State Public Notification requested5 linked violations
January 3, 2005State Violation/Reminder Notice5 linked violations
January 3, 2005State Public Notification requested6 linked violations
January 3, 2005State Violation/Reminder Notice5 linked violations
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice1 linked violation
August 5, 2004State Compliance achieved1 linked violation
August 5, 2004State Compliance achieved1 linked violation
June 7, 2004State Compliance achieved2 linked violations
May 12, 2004State Violation/Reminder Notice1 linked violation
May 12, 2004State Public Notification requested1 linked violation
May 12, 2004State Violation/Reminder Notice1 linked violation
May 12, 2004State Public Notification requested1 linked violation
November 24, 2003State Compliance achieved1 linked violation
November 29, 1995State Violation/Reminder Notice1 linked violation
March 22, 1994State Violation/Reminder Notice6 linked violations

Contact

POPE, DESIREE

Phone not on record

WILSALL, MT 59086