Is TRI COUNTY WATER DISTRICT required to publish a Consumer Confidence Report?

Yes. TRI COUNTY WATER DISTRICT is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is TRI COUNTY WATER DISTRICT’s next Consumer Confidence Report due?

TRI COUNTY WATER DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

POWER, MT · Teton County

TRI COUNTY WATER DISTRICT Water System

Consumer Confidence Report status

TRI COUNTY WATER DISTRICT must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for TRI COUNTY WATER DISTRICT.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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): MT0002912
System type: Community Water System
Population served: 470
Service connections: 177
Ownership: local government
Water source: groundwater (wells)

TRI COUNTY WATER DISTRICT is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 470 people from groundwater.

As of August 1, 2026, its federal record holds 76 entries between 1994 and 2023, all of which EPA lists as closed. Nothing has been added since 2023.

Of the 76, 73 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals, volatile organic chemicals, and inorganic chemicals.

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2023 – July 31, 2023
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2023 – October 22, 2025
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2023 – October 22, 2025
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2017 – August 31, 2018
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 30, 2014 – February 3, 2015
Resolved
Monitoring, Regular
—
Mercury
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Thallium, Total
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Beryllium, Total
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Antimony, Total
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Nickel
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Cadmium
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Barium
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Fluoride
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Chromium
January 1, 2014 – December 31, 2016
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2012 – March 31, 2012
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2012 – March 31, 2012
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2011 – March 31, 2011
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2011 – March 31, 2011
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
October 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Styrene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Benzene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Toluene
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2010 – December 31, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2009 – November 12, 2009
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2008 – August 14, 2008
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
LASSO
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Simazine
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Endrin
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Picloram
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2007 – January 31, 2007
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Nickel
January 1, 2002 – December 31, 2004
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 1994 – July 1, 1993
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 1, 2023 – July 31, 2023	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2023 – October 22, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2023 – October 22, 2025	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2017 – August 31, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
December 30, 2014 – February 3, 2015	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2014 – December 31, 2016	Monitoring, Regular	Mercury	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Thallium, Total	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Antimony, Total	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Nickel	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Cadmium	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Barium	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Fluoride	—	Archived
January 1, 2014 – December 31, 2016	Monitoring, Regular	Chromium	—	Archived
January 1, 2012 – March 31, 2012	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2012 – March 31, 2012	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2011 – March 31, 2011	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2011 – March 31, 2011	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
October 1, 2010 – December 31, 2010	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
October 1, 2010 – December 31, 2010	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Styrene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Benzene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Toluene	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 2009 – November 12, 2009	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2008 – August 14, 2008	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	LASSO	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Simazine	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Endrin	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Picloram	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2007 – January 31, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Nickel	—	Resolved
January 1, 1994 – July 1, 1993	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

November 14, 2025State Public Notification received2 linked violations
October 22, 2025State Violation/Reminder Notice2 linked violations
October 22, 2025State Compliance achieved2 linked violations
October 22, 2025State Public Notification requested2 linked violations
February 4, 2025State Compliance achieved1 linked violation
February 4, 2025State Violation/Reminder Notice1 linked violation
July 31, 2023State Compliance achieved1 linked violation
July 11, 2023State Violation/Reminder Notice1 linked violation
August 31, 2018State Compliance achieved1 linked violation
October 23, 2017State Violation/Reminder Notice1 linked violation
October 23, 2017State Public Notification requested1 linked violation
February 3, 2015State Compliance achieved1 linked violation
January 26, 2015State Violation/Reminder Notice1 linked violation
April 17, 2012State Compliance achieved2 linked violations
April 13, 2012State Violation/Reminder Notice1 linked violation
April 13, 2012State Public Notification requested1 linked violation
April 13, 2012State Violation/Reminder Notice1 linked violation
April 13, 2012State Public Notification requested1 linked violation
July 6, 2011State Compliance achieved52 linked violations
April 14, 2011State Violation/Reminder Notice1 linked violation
April 14, 2011State Violation/Reminder Notice1 linked violation
April 14, 2011State Public Notification requested1 linked violation
April 14, 2011State Public Notification requested1 linked violation
February 1, 2011State Violation/Reminder Notice26 linked violations
February 1, 2011State Public Notification requested26 linked violations
January 31, 2011State Public Notification requested21 linked violations
January 31, 2011State Violation/Reminder Notice1 linked violation
January 31, 2011State Public Notification requested1 linked violation
January 31, 2011State Violation/Reminder Notice1 linked violation
January 31, 2011State Public Notification requested1 linked violation
January 31, 2011State Violation/Reminder Notice1 linked violation
January 31, 2011State Public Notification requested1 linked violation
January 31, 2011State Violation/Reminder Notice21 linked violations
November 17, 2009State Violation/Reminder Notice1 linked violation
November 17, 2009State Public Notification requested1 linked violation
November 12, 2009State Compliance achieved1 linked violation
November 12, 2009State Violation/Reminder Notice1 linked violation
August 14, 2008State Violation/Reminder Notice1 linked violation
August 14, 2008State Public Notification requested1 linked violation
August 14, 2008State Compliance achieved1 linked violation
February 23, 2007State Compliance achieved1 linked violation
February 16, 2007State Violation/Reminder Notice1 linked violation
February 16, 2007State Public Notification requested1 linked violation
July 6, 2005State Compliance achieved4 linked violations
April 14, 2005State Public Notification requested4 linked violations
April 14, 2005State Violation/Reminder Notice4 linked violations
July 1, 1993State Compliance achieved1 linked violation

Common questions

Is TRI COUNTY WATER DISTRICT required to publish a Consumer Confidence Report?: Yes. TRI COUNTY WATER DISTRICT is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is TRI COUNTY WATER DISTRICT’s next Consumer Confidence Report due?: TRI COUNTY WATER DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does TRI COUNTY WATER DISTRICT have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for TRI COUNTY WATER DISTRICT.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

GRILLEY, CLIFTON H

Phone not on record

POWER, MT 59468