ST IGNATIUS, MT · Lake County

ST IGNATIUS TOWN OF Water System

Current status

No open violations on record as of July 4, 2026.

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): MT0001740
System type: Community Water System
Population served: 700
Service connections: 291
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
September 1, 2025 – September 30, 2025
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
July 17, 2024 – September 25, 2024
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2024 – December 31, 2024
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2022 – July 8, 2024
Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)
—
Groundwater Rule
July 1, 2020 – July 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
September 1, 2019 – August 31, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
September 1, 2019 – August 31, 2020
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
October 1, 2016 – October 31, 2016
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
March 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
LASSO
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Endrin
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Simazine
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Picloram
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2016 – March 31, 2016
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Groundwater Rule
September 1, 2015 – September 30, 2015
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2015 – October 19, 2015
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – July 18, 2012
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2012 – December 31, 2012
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2012 – March 2, 2012
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Failure To Address Contamination
Health-based
Groundwater Rule
July 14, 2011 – June 24, 2015
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
July 1, 2010 – July 31, 2010
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2007 – October 31, 2007
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2007 – July 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1995 – June 30, 1995
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
September 1, 2025 – September 30, 2025	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
July 17, 2024 – September 25, 2024	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 1, 2022 – July 8, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2020 – July 31, 2020	Monitoring of Treatment (SWTR-Unfilt/GWR)	Groundwater Rule	—	Resolved
September 1, 2019 – August 31, 2020	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
September 1, 2019 – August 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2016 – October 31, 2016	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
March 1, 2016 – March 31, 2016	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	LASSO	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Endrin	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Simazine	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Picloram	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Aldicarb sulfone	—	Resolved
September 1, 2015 – September 30, 2015	Treatment Technique (SWTR and GWR)	Groundwater Rule	Health-based	Resolved
July 1, 2015 – October 19, 2015	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2012 – July 18, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2012 – December 31, 2012	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2012 – March 2, 2012	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2012 – December 31, 2012	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 2011 – September 30, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 14, 2011 – June 24, 2015	Failure To Address Contamination	Groundwater Rule	Health-based	Resolved
July 1, 2010 – July 31, 2010	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2007 – October 31, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2007 – July 31, 2008	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 1995 – June 30, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

November 4, 2025State Compliance achieved1 linked violation
October 27, 2025State Public Notification requested2 linked violations
October 27, 2025State Violation/Reminder Notice1 linked violation
January 28, 2025State Compliance achieved1 linked violation
January 16, 2025State Public Notification requested1 linked violation
January 16, 2025State Violation/Reminder Notice1 linked violation
September 25, 2024State Compliance achieved1 linked violation
August 27, 2024State Violation/Reminder Notice1 linked violation
August 27, 2024State Public Notification requested1 linked violation
July 8, 2024State Compliance achieved1 linked violation
November 2, 2022State Violation/Reminder Notice1 linked violation
November 2, 2022State Public Notification requested1 linked violation
August 18, 2021State Compliance achieved2 linked violations
October 19, 2020State Violation/Reminder Notice2 linked violations
October 19, 2020State Public Notification requested2 linked violations
September 21, 2020State Public Notification received1 linked violation
August 19, 2020State Violation/Reminder Notice1 linked violation
August 19, 2020State Public Notification requested1 linked violation
August 11, 2020State Compliance achieved1 linked violation
December 6, 2016State Compliance achieved1 linked violation
November 29, 2016State Public Notification requested1 linked violation
November 29, 2016State Violation/Reminder Notice1 linked violation
May 10, 2016State Compliance achieved1 linked violation
April 27, 2016State Compliance achieved1 linked violation
April 27, 2016State Compliance achieved1 linked violation
April 27, 2016State Compliance achieved26 linked violations
April 21, 2016State Public Notification requested1 linked violation
April 21, 2016State Violation/Reminder Notice1 linked violation
April 19, 2016State Public Notification requested1 linked violation
April 19, 2016State Public Notification requested26 linked violations
April 19, 2016State Public Notification requested1 linked violation
April 19, 2016State Violation/Reminder Notice1 linked violation
April 19, 2016State Violation/Reminder Notice1 linked violation
April 19, 2016State Public Notification requested1 linked violation
April 19, 2016State Violation/Reminder Notice26 linked violations
April 19, 2016State Violation/Reminder Notice1 linked violation
November 10, 2015State Compliance achieved1 linked violation
October 22, 2015State Violation/Reminder Notice1 linked violation
October 22, 2015State Public Notification requested1 linked violation
October 19, 2015State Public Notification requested1 linked violation
October 19, 2015State Violation/Reminder Notice1 linked violation
October 19, 2015State Compliance achieved1 linked violation
June 24, 2015State Compliance achieved1 linked violation
December 31, 2013State Compliance achieved2 linked violations
January 16, 2013State Violation/Reminder Notice2 linked violations
January 16, 2013State Public Notification requested2 linked violations
July 18, 2012State Compliance achieved1 linked violation
July 12, 2012State Violation/Reminder Notice1 linked violation
July 12, 2012State Public Notification requested1 linked violation
March 2, 2012State Compliance achieved1 linked violation
February 15, 2012State Violation/Reminder Notice1 linked violation
November 18, 2011State Administrative/Compliance Order without penalty issued1 linked violation
November 18, 2011State Administrative/Compliance Order without penalty issued1 linked violation
October 19, 2011State Violation/Reminder Notice1 linked violation
October 19, 2011State Public Notification requested1 linked violation
October 4, 2011State Compliance achieved1 linked violation
August 4, 2011State Public Notification received1 linked violation
July 20, 2011State Other1 linked violation
July 14, 2011State Violation/Reminder Notice1 linked violation
July 14, 2011State Other1 linked violation
July 14, 2011State Public Notification requested1 linked violation
August 2, 2010State Compliance achieved1 linked violation
July 21, 2010State Public Notification requested1 linked violation
July 21, 2010State Boil Water Order1 linked violation
July 21, 2010State Violation/Reminder Notice1 linked violation
July 21, 2010State Violation/Reminder Notice1 linked violation
May 7, 2010State Compliance achieved2 linked violations
January 7, 2009State Compliance achieved4 linked violations
September 30, 2008State Public Notification received1 linked violation
September 18, 2008State Violation/Reminder Notice1 linked violation
September 18, 2008State Public Notification requested1 linked violation
September 18, 2008State Violation/Reminder Notice1 linked violation
August 5, 2008State Violation/Reminder Notice2 linked violations
August 5, 2008State Public Notification requested1 linked violation
July 31, 2008State Compliance achieved2 linked violations
October 25, 2007State Violation/Reminder Notice1 linked violation
October 25, 2007State Violation/Reminder Notice1 linked violation
October 25, 2007State Violation/Reminder Notice1 linked violation
June 12, 2002State Compliance achieved11 linked violations
June 12, 2001State Violation/Reminder Notice1 linked violation
June 12, 2001State Public Notification requested1 linked violation
August 1, 1995State Violation/Reminder Notice2 linked violations

Contact

WALKER, AMBERLY

406-745-3791

ST IGNATIUS, MT 59865