GREAT FALLS, MT · Cascade County

GORE HILL COUNTY WATER DIST 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): MT0000232
System type: Community Water System
Population served: 500
Service connections: 230
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Source Water (GWR)
—
E. COLI
July 22, 2025 – July 24, 2025
Resolved
Monitoring, Regular
—
Atrazine
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Picloram
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Dinoseb
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Carbofuran
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Atrazine
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
LASSO
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Heptachlor
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Heptachlor epoxide
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
2,4-D
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
2,4,5-TP
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Pentachlorophenol
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Chlordane
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Endrin
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
BHC-GAMMA
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Methoxychlor
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Toxaphene
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Dalapon
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
OXAMYL
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Simazine
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Picloram
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Dinoseb
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Carbofuran
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
LASSO
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Heptachlor
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Heptachlor epoxide
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
2,4-D
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
2,4,5-TP
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Pentachlorophenol
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Chlordane
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Endrin
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
BHC-GAMMA
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Methoxychlor
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Toxaphene
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Dalapon
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
OXAMYL
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Simazine
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2024 – June 30, 2024
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2024 – June 30, 2024
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2023 – December 3, 2024
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2011 – March 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2010 – December 31, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2010 – September 30, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2010 – June 30, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2010 – March 31, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2009 – March 31, 2009
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
October 1, 2008 – December 31, 2008
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
July 1, 2008 – September 30, 2008
Resolved
Monitoring, Regular
—
Arsenic
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2008 – June 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
October 1, 2007 – December 31, 2007
Resolved
Monitoring, Regular
—
Arsenic
October 1, 2007 – December 31, 2007
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2007 – January 20, 2010
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Benzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Toluene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Styrene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2002 – December 31, 2010
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1998 – May 31, 1998
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
July 22, 2025 – July 24, 2025	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Atrazine	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Picloram	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Dinoseb	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Carbofuran	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Atrazine	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	LASSO	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Heptachlor	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Heptachlor epoxide	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	2,4-D	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	2,4,5-TP	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Pentachlorophenol	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Chlordane	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Endrin	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	BHC-GAMMA	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Methoxychlor	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Toxaphene	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Dalapon	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	OXAMYL	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Simazine	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Picloram	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Dinoseb	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Carbofuran	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	LASSO	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Heptachlor	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Heptachlor epoxide	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	2,4-D	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	2,4,5-TP	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Pentachlorophenol	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Chlordane	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Endrin	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	BHC-GAMMA	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Methoxychlor	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Toxaphene	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Dalapon	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	OXAMYL	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Simazine	—	Resolved
April 1, 2024 – June 30, 2024	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2024 – June 30, 2024	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
October 1, 2023 – December 3, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2011 – March 31, 2011	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2010 – December 31, 2010	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 2010 – September 30, 2010	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2010 – June 30, 2010	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2008 – December 31, 2008	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
July 1, 2008 – September 30, 2008	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Arsenic	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2007 – December 31, 2007	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
October 1, 2007 – December 31, 2007	Monitoring, Regular	Arsenic	—	Archived
July 1, 2007 – January 20, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Benzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Toluene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Styrene	—	Resolved
January 1, 2002 – December 31, 2010	Monitoring, Regular	Asbestos	—	Archived
May 1, 1998 – May 31, 1998	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

August 25, 2025State Public Notification requested1 linked violation
August 25, 2025State Violation/Reminder Notice1 linked violation
December 3, 2024State Compliance achieved1 linked violation
October 22, 2024State Compliance achieved23 linked violations
October 22, 2024State Compliance achieved23 linked violations
October 16, 2024State Violation/Reminder Notice23 linked violations
October 16, 2024State Public Notification requested23 linked violations
October 16, 2024State Violation/Reminder Notice23 linked violations
October 16, 2024State Public Notification requested23 linked violations
July 16, 2024State Violation/Reminder Notice1 linked violation
July 16, 2024State Compliance achieved1 linked violation
July 16, 2024State Public Notification requested1 linked violation
July 16, 2024State Compliance achieved1 linked violation
July 16, 2024State Public Notification requested1 linked violation
July 16, 2024State Violation/Reminder Notice1 linked violation
November 9, 2023State Public Notification requested1 linked violation
November 9, 2023State Violation/Reminder Notice1 linked violation
August 23, 2011State Compliance achieved1 linked violation
August 23, 2011State Compliance achieved1 linked violation
August 23, 2011State Compliance achieved10 linked violations
August 23, 2011State Compliance achieved10 linked violations
August 23, 2011State Compliance achieved2 linked violations
May 9, 2011State Public Notification received1 linked violation
April 7, 2011State Public Notification requested1 linked violation
April 7, 2011State Violation/Reminder Notice1 linked violation
March 16, 2011State Public Notification received1 linked violation
January 12, 2011State Public Notification requested1 linked violation
January 12, 2011State Violation/Reminder Notice1 linked violation
December 31, 2010State Public Notification received1 linked violation
November 2, 2010State Public Notification received1 linked violation
October 21, 2010State Violation/Reminder Notice1 linked violation
October 21, 2010State Public Notification requested1 linked violation
September 3, 2010State Public Notification received1 linked violation
July 29, 2010State Public Notification requested1 linked violation
July 29, 2010State Public Notification requested1 linked violation
July 29, 2010State Violation/Reminder Notice1 linked violation
July 29, 2010State Violation/Reminder Notice1 linked violation
June 9, 2010State Public Notification received1 linked violation
January 21, 2010State Violation/Reminder Notice2 linked violations
January 21, 2010State Public Notification requested2 linked violations
January 20, 2010State Compliance achieved3 linked violations
October 28, 2009State Violation/Reminder Notice1 linked violation
March 30, 2009State Compliance achieved3 linked violations
October 21, 2008State Public Notification requested2 linked violations
October 21, 2008State Violation/Reminder Notice1 linked violation
August 15, 2008State Violation/Reminder Notice11 linked violations
July 30, 2008State Violation/Reminder Notice3 linked violations
February 2, 2007State Compliance achieved24 linked violations
June 23, 1998State Violation/Reminder Notice1 linked violation

Contact

WALTER, CHRISTY

406-761-6528

GREAT FALLS, MT 59404