CUT BANK, MT · Glacier County

HIDDEN LAKE COLONY Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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): MT0003932
System type: Community Water System
Population served: 80
Service connections: 7
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2025
Unaddressed
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2024 – October 1, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2024 – July 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2024 – April 30, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2023 – June 30, 2023
Resolved
Monitoring, Regular
—
Antimony, Total
April 1, 2023 – June 27, 2023
Resolved
Monitoring, Regular
—
Arsenic
April 1, 2023 – June 27, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2023 – March 31, 2023
Resolved
Monitoring, Regular
—
Antimony, Total
October 1, 2022 – December 31, 2022
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
September 22, 2022 – September 27, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2022 – July 31, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2021 – December 31, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – July 20, 2020
Resolved
Monitoring, Regular
—
Antimony, Total
July 1, 2020 – September 30, 2020
Resolved
Monitoring, Regular
—
Arsenic
July 1, 2020 – September 30, 2020
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
April 1, 2020 – June 30, 2020
Resolved
Monitoring, Regular
—
Heptachlor epoxide
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Endrin
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
BHC-GAMMA
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Methoxychlor
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Toxaphene
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Dalapon
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
OXAMYL
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Simazine
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Picloram
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Dinoseb
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Carbofuran
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Atrazine
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
LASSO
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Heptachlor
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
2,4-D
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
2,4,5-TP
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Chlordane
April 1, 2019 – June 30, 2019
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2019 – June 27, 2019
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2019 – June 27, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2017 – December 31, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2017 – December 31, 2017
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2017 – September 30, 2017
Resolved
Monitoring, Regular
—
Arsenic
October 1, 2016 – December 31, 2016
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
June 1, 2016 – June 30, 2016
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
May 1, 2016 – May 31, 2016
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
March 1, 2016 – March 31, 2016
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
January 1, 2016 – January 31, 2016
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
October 1, 2015 – October 31, 2015
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
June 1, 2015 – June 30, 2015
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
November 1, 2014 – November 30, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2014 – June 30, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2014 – March 31, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2013 – December 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2013 – August 31, 2013
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Arsenic
July 1, 2013 – September 30, 2013
Resolved
Monitoring, Regular
—
Arsenic
April 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2013 – March 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2012 – July 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2012 – September 30, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2002 – March 31, 2002
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1997 – March 31, 1997
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2025	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Unaddressed
October 1, 2024 – October 1, 2024	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2024 – July 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2024 – April 30, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
June 1, 2023 – June 30, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2023 – June 27, 2023	Monitoring, Regular	Antimony, Total	—	Resolved
April 1, 2023 – June 27, 2023	Monitoring, Regular	Arsenic	—	Resolved
March 1, 2023 – March 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2022 – December 31, 2022	Monitoring, Regular	Antimony, Total	—	Resolved
September 22, 2022 – September 27, 2022	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2022 – July 31, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2021 – December 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2020 – July 20, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring, Regular	Antimony, Total	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring, Regular	Arsenic	—	Resolved
April 1, 2020 – June 30, 2020	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Heptachlor epoxide	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Endrin	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	BHC-GAMMA	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Methoxychlor	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Toxaphene	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Dalapon	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	OXAMYL	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Simazine	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Picloram	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Dinoseb	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Carbofuran	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Atrazine	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	LASSO	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Heptachlor	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	2,4-D	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	2,4,5-TP	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 2019 – June 30, 2019	Monitoring, Regular	Chlordane	—	Resolved
April 1, 2019 – June 27, 2019	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
April 1, 2019 – June 27, 2019	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
December 1, 2017 – December 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2017 – December 31, 2017	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 2017 – September 30, 2017	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
October 1, 2016 – December 31, 2016	Monitoring, Regular	Arsenic	—	Resolved
June 1, 2016 – June 30, 2016	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
May 1, 2016 – May 31, 2016	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
March 1, 2016 – March 31, 2016	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
January 1, 2016 – January 31, 2016	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
October 1, 2015 – October 31, 2015	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
June 1, 2015 – June 30, 2015	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
November 1, 2014 – November 30, 2014	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2014 – June 30, 2014	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2014 – March 31, 2014	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2013 – December 31, 2013	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
August 1, 2013 – August 31, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2013 – September 30, 2013	Maximum Contaminant Level Violation, Single Sample	Arsenic	Health-based	Resolved
April 1, 2013 – June 30, 2013	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2013 – March 31, 2013	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 2012 – July 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
March 1, 2002 – March 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 1997 – March 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

October 6, 2025State Violation/Reminder Notice1 linked violation
October 1, 2024State Compliance achieved1 linked violation
October 1, 2024State Violation/Reminder Notice1 linked violation
August 29, 2024State Compliance achieved1 linked violation
August 19, 2024State Public Notification requested1 linked violation
August 19, 2024State Violation/Reminder Notice1 linked violation
May 29, 2024State Compliance achieved1 linked violation
May 20, 2024State Violation/Reminder Notice1 linked violation
May 20, 2024State Public Notification requested1 linked violation
July 25, 2023State Compliance achieved1 linked violation
July 17, 2023State Violation/Reminder Notice1 linked violation
July 17, 2023State Public Notification requested1 linked violation
July 17, 2023State Violation/Reminder Notice1 linked violation
July 17, 2023State Public Notification requested1 linked violation
July 13, 2023State Violation/Reminder Notice1 linked violation
July 13, 2023State Public Notification requested1 linked violation
June 27, 2023State Compliance achieved1 linked violation
June 27, 2023State Compliance achieved1 linked violation
April 24, 2023State Compliance achieved1 linked violation
April 17, 2023State Violation/Reminder Notice1 linked violation
April 17, 2023State Public Notification requested1 linked violation
March 20, 2023State Compliance achieved1 linked violation
January 25, 2023State Public Notification requested1 linked violation
January 25, 2023State Violation/Reminder Notice1 linked violation
November 4, 2022State Public Notification requested1 linked violation
November 4, 2022State Violation/Reminder Notice1 linked violation
September 27, 2022State Compliance achieved1 linked violation
September 16, 2022State Public Notification requested1 linked violation
September 16, 2022State Violation/Reminder Notice1 linked violation
August 10, 2022State Compliance achieved1 linked violation
February 3, 2022State Violation/Reminder Notice1 linked violation
February 3, 2022State Public Notification requested1 linked violation
January 17, 2022State Compliance achieved1 linked violation
July 15, 2021State Public Notification received1 linked violation
December 21, 2020State Compliance achieved1 linked violation
December 21, 2020State Compliance achieved1 linked violation
October 15, 2020State Public Notification requested1 linked violation
October 15, 2020State Violation/Reminder Notice1 linked violation
October 15, 2020State Public Notification requested1 linked violation
October 15, 2020State Violation/Reminder Notice1 linked violation
July 20, 2020State Violation/Reminder Notice1 linked violation
July 20, 2020State Compliance achieved1 linked violation
July 20, 2020State Compliance achieved1 linked violation
July 16, 2020State Violation/Reminder Notice1 linked violation
July 16, 2020State Public Notification requested1 linked violation
August 26, 2019State Compliance achieved24 linked violations
July 15, 2019State Public Notification requested1 linked violation
July 15, 2019State Public Notification requested1 linked violation
July 15, 2019State Violation/Reminder Notice2 linked violations
July 15, 2019State Public Notification requested23 linked violations
July 15, 2019State Violation/Reminder Notice23 linked violations
July 15, 2019State Violation/Reminder Notice1 linked violation
June 27, 2019State Compliance achieved1 linked violation
June 27, 2019State Compliance achieved2 linked violations
March 12, 2018State Compliance achieved1 linked violation
March 12, 2018State Compliance achieved1 linked violation
January 24, 2018State Public Notification received1 linked violation
January 17, 2018State Public Notification requested1 linked violation
January 17, 2018State Violation/Reminder Notice2 linked violations
January 8, 2018State Compliance achieved1 linked violation
November 6, 2017State Violation/Reminder Notice1 linked violation
November 6, 2017State Public Notification requested1 linked violation
September 29, 2017State Public Notification received1 linked violation
September 28, 2017State Violation/Reminder Notice1 linked violation
September 28, 2017State Public Notification requested1 linked violation
February 23, 2017State Compliance achieved1 linked violation
February 3, 2017State Public Notification requested1 linked violation
February 3, 2017State Violation/Reminder Notice1 linked violation
September 10, 2016State Public Notification received1 linked violation
September 10, 2016State Public Notification received1 linked violation
July 25, 2016State Violation/Reminder Notice1 linked violation
July 25, 2016State Public Notification requested1 linked violation
July 11, 2016State Compliance achieved2 linked violations
June 28, 2016State Public Notification requested1 linked violation
June 28, 2016State Violation/Reminder Notice1 linked violation
May 10, 2016State Compliance achieved1 linked violation
April 21, 2016State Public Notification requested1 linked violation
April 21, 2016State Violation/Reminder Notice1 linked violation
March 9, 2016State Compliance achieved2 linked violations
March 9, 2016State Compliance achieved1 linked violation
February 22, 2016State Public Notification requested1 linked violation
February 22, 2016State Violation/Reminder Notice1 linked violation
November 24, 2015State Violation/Reminder Notice1 linked violation
November 24, 2015State Public Notification requested1 linked violation
July 26, 2015State Compliance achieved1 linked violation
July 22, 2015State Violation/Reminder Notice1 linked violation
July 22, 2015State Public Notification requested1 linked violation
January 12, 2015State Compliance achieved1 linked violation
December 15, 2014State Public Notification requested1 linked violation
December 15, 2014State Violation/Reminder Notice1 linked violation
November 17, 2014State Compliance achieved2 linked violations
November 17, 2014State Compliance achieved1 linked violation
November 17, 2014State Compliance achieved1 linked violation
November 17, 2014State Compliance achieved1 linked violation
November 17, 2014State Compliance achieved2 linked violations
October 7, 2014State Compliance achieved1 linked violation
August 29, 2014State Violation/Reminder Notice1 linked violation
August 29, 2014State Public Notification requested1 linked violation
May 26, 2014State Violation/Reminder Notice1 linked violation
May 26, 2014State Public Notification requested1 linked violation
February 26, 2014State Public Notification received3 linked violations
February 13, 2014State Violation/Reminder Notice1 linked violation
February 13, 2014State Public Notification requested1 linked violation
January 24, 2014State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
January 10, 2014State Administrative/Compliance Order without penalty issued9 linked violations
January 10, 2014State Administrative/Compliance Order without penalty issued2 linked violations
November 22, 2013State Public Notification received1 linked violation
October 9, 2013State Violation/Reminder Notice1 linked violation
October 9, 2013State Public Notification requested1 linked violation
September 20, 2013State Public Notification received1 linked violation
September 16, 2013State Public Notification requested1 linked violation
September 16, 2013State Violation/Reminder Notice1 linked violation
September 9, 2013State Compliance achieved1 linked violation
September 9, 2013State Compliance achieved1 linked violation
August 27, 2013State Public Notification received1 linked violation
August 19, 2013State Other2 linked violations
August 7, 2013State Other7 linked violations
July 16, 2013State Public Notification requested1 linked violation
July 16, 2013State Violation/Reminder Notice1 linked violation
April 9, 2013State Public Notification requested1 linked violation
April 9, 2013State Violation/Reminder Notice1 linked violation
February 20, 2013State Public Notification received1 linked violation
November 26, 2012State Violation/Reminder Notice1 linked violation
November 26, 2012State Public Notification requested1 linked violation
October 29, 2012State Public Notification received2 linked violations
October 18, 2012State Violation/Reminder Notice1 linked violation
October 18, 2012State Public Notification requested1 linked violation
August 29, 2012State Public Notification received1 linked violation
August 15, 2012State Violation/Reminder Notice1 linked violation
August 15, 2012State Public Notification requested1 linked violation
August 14, 2012State Compliance achieved1 linked violation
January 6, 2009State Compliance achieved25 linked violations
May 6, 2007State Compliance achieved1 linked violation
July 25, 2006State Public Notification received1 linked violation
July 17, 2006State Violation/Reminder Notice1 linked violation
July 17, 2006State Public Notification requested1 linked violation
July 17, 2006State Violation/Reminder Notice1 linked violation
May 14, 2002State Public Notification received3 linked violations
May 14, 2002State Compliance achieved1 linked violation
April 21, 2002State Public Notification requested1 linked violation
April 21, 2002State Violation/Reminder Notice1 linked violation
April 30, 1997State Violation/Reminder Notice2 linked violations

Contact

HIDDEN LAKE COLONY INC

406-336-3695

CUT BANK, MT 59427