HINSDALE, MT · Valley County

HINSDALE WATER DEPARTMENT 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): MT0000250
System type: Community Water System
Population served: 250
Service connections: 137
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2026 – January 31, 2026
Archived
Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
November 11, 2025
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2025 – July 17, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2025 – February 28, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2021 – July 31, 2021
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
August 20, 2019 – January 21, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2018 – April 30, 2018
Resolved
Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
December 30, 2017 – March 5, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2017 – August 2, 2017
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2017 – December 31, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – July 21, 2016
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 27, 2015 – October 29, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2015 – October 31, 2015
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2015 – October 29, 2015
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2015 – July 16, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2014 – September 30, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – July 16, 2014
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2013 – March 11, 2013
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
December 1, 2011 – February 21, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2008 – November 30, 2008
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2008 – August 13, 2009
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2008 – December 31, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2006 – October 31, 2006
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – August 13, 2009
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2005 – November 30, 2005
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2005 – December 31, 2007
Archived
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2005 – December 31, 2007
Archived
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2004 – December 31, 2004
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Nickel
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1994 – December 31, 1994
Resolved

Archived closed in EPA's records (typically due to age or a data correction)Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2026 – January 31, 2026	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
November 11, 2025	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Unaddressed
July 1, 2025 – July 17, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
February 1, 2025 – February 28, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – July 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 20, 2019 – January 21, 2020	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
April 1, 2018 – April 30, 2018	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 30, 2017 – March 5, 2018	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
July 1, 2017 – August 2, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2017 – December 31, 2017	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
July 1, 2016 – July 21, 2016	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 27, 2015 – October 29, 2015	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2015 – October 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2015 – October 29, 2015	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2015 – July 16, 2015	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2014 – July 16, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2013 – March 11, 2013	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
December 1, 2011 – February 21, 2012	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
November 1, 2008 – November 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2008 – August 13, 2009	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2008 – December 31, 2008	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 1, 2006 – October 31, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2006 – August 13, 2009	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
November 1, 2005 – November 30, 2005	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
January 1, 2005 – December 31, 2007	Monitoring and Reporting (DBP)	TTHM	—	Archived
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Nickel	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Arsenic	—	Resolved
June 1, 1997 – June 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1994 – December 31, 1994	Monitoring, Regular	Nitrate	—	Resolved

Archived closed in EPA's records (typically due to age or a data correction)Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

February 18, 2026State Violation/Reminder Notice1 linked violation
February 18, 2026State Public Notification requested2 linked violations
December 11, 2025State Violation/Reminder Notice3 linked violations
July 17, 2025State Compliance achieved5 linked violations
March 17, 2025State Public Notification requested1 linked violation
March 17, 2025State Violation/Reminder Notice2 linked violations
August 24, 2021State Compliance achieved2 linked violations
August 23, 2021State Public Notification requested5 linked violations
September 30, 2019State Violation/Reminder Notice1 linked violation
May 15, 2018State Public Notification requested1 linked violation
May 15, 2018State Violation/Reminder Notice1 linked violation
April 25, 2018State Compliance achieved1 linked violation
February 12, 2018State Violation/Reminder Notice1 linked violation
January 23, 2018State Public Notification requested1 linked violation
January 23, 2018State Violation/Reminder Notice1 linked violation
August 2, 2017State Compliance achieved1 linked violation
July 20, 2017State Violation/Reminder Notice1 linked violation
July 21, 2016State Compliance achieved1 linked violation
July 14, 2016State Violation/Reminder Notice1 linked violation
November 17, 2015State Public Notification requested1 linked violation
November 17, 2015State Violation/Reminder Notice1 linked violation
November 2, 2015State Violation/Reminder Notice1 linked violation
November 2, 2015State Violation/Reminder Notice1 linked violation
November 2, 2015State Public Notification requested2 linked violations
October 29, 2015State Compliance achieved1 linked violation
October 29, 2015State Compliance achieved1 linked violation
October 19, 2015State Public Notification requested1 linked violation
October 19, 2015State Violation/Reminder Notice1 linked violation
July 16, 2015State Compliance achieved1 linked violation
July 15, 2015State Violation/Reminder Notice1 linked violation
November 19, 2014State Compliance achieved1 linked violation
September 30, 2014State Public Notification received1 linked violation
September 10, 2014State Violation/Reminder Notice1 linked violation
September 10, 2014State Public Notification requested3 linked violations
September 10, 2014State Violation/Reminder Notice1 linked violation
July 16, 2014State Compliance achieved1 linked violation
July 14, 2014State Violation/Reminder Notice1 linked violation
March 11, 2013State Compliance achieved1 linked violation
January 14, 2013State Violation/Reminder Notice1 linked violation
February 21, 2012State Compliance achieved1 linked violation
January 23, 2012State Violation/Reminder Notice1 linked violation
January 23, 2012State Public Notification requested1 linked violation
November 10, 2008State Compliance achieved6 linked violations
September 2, 2008State Other6 linked violations
July 28, 2008State Compliance achieved4 linked violations
November 7, 2006State Violation/Reminder Notice2 linked violations
December 26, 2005State Public Notification requested4 linked violations
April 14, 2005State Public Notification requested5 linked violations
April 13, 2005State Violation/Reminder Notice2 linked violations

Contact

JOHNSON, WAYNE

406-228-2433

HINSDALE, MT 59241