Is COLSTRIP CITY OF required to publish a Consumer Confidence Report?

Yes. COLSTRIP CITY OF 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 COLSTRIP CITY OF’s next Consumer Confidence Report due?

COLSTRIP CITY OF’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.

COLSTRIP, MT · Rosebud County

COLSTRIP CITY OF Water System

Consumer Confidence Report status

COLSTRIP CITY OF 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 COLSTRIP CITY OF.

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): MT0000180
System type: Community Water System
Population served: 2,350
Service connections: 913
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

COLSTRIP CITY OF is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 2,350 people from surface water.

As of August 1, 2026, its federal record holds 36 entries between 1993 and 2024, all of which EPA lists as closed.

Of the 36, 34 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 inorganic chemicals, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Surface Water Treatment Rules.

Violation history

Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2024 – September 30, 2024
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2024 – July 31, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2024 – January 31, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2024 – January 31, 2024
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2024 – January 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2023 – September 30, 2023
Resolved
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2023 – September 30, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2022 – May 31, 2022
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – October 30, 2013
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
August 1, 2008 – August 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2007 – September 30, 2007
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Resolved
Monitoring, Regular
—
Selenium
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Barium
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Chromium
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Mercury
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Nickel
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2003 – December 31, 2003
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2003 – December 31, 2003
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2001 – September 21, 2005
Resolved
Monitoring, Regular
—
Arsenic
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Regular
—
Nickel
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Regular
—
Barium
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Regular
—
Chromium
January 1, 1997 – December 31, 1997
Resolved
Monitoring, Regular
—
Cadmium
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1993 – December 31, 1993
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2024 – September 30, 2024	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2024 – July 31, 2024	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2024 – January 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2023 – September 30, 2023	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2023 – September 30, 2023	Monitoring and Reporting (DBP)	TTHM	—	Resolved
May 1, 2022 – May 31, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2011 – October 30, 2013	Monitoring, Regular	Asbestos	—	Resolved
August 1, 2008 – August 31, 2008	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2007 – September 30, 2007	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Selenium	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Barium	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Chromium	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Mercury	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Nickel	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2003 – December 31, 2003	Monitoring, Regular	Thallium, Total	—	Resolved
October 1, 2001 – September 21, 2005	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	Arsenic	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Nickel	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Barium	—	Resolved
January 1, 1997 – December 31, 1997	Monitoring, Regular	Chromium	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Cadmium	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1993 – December 31, 1993	Monitoring, Regular	Nitrate	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

December 20, 2024State Compliance achieved2 linked violations
December 20, 2024State Public Notification requested2 linked violations
December 20, 2024State Violation/Reminder Notice1 linked violation
August 23, 2024State Violation/Reminder Notice1 linked violation
August 23, 2024State Public Notification received2 linked violations
August 23, 2024State Public Notification requested2 linked violations
March 12, 2024State Public Notification requested2 linked violations
March 12, 2024State Public Notification requested2 linked violations
March 12, 2024State Violation/Reminder Notice1 linked violation
March 12, 2024State Violation/Reminder Notice1 linked violation
March 12, 2024State Public Notification requested2 linked violations
March 12, 2024State Violation/Reminder Notice1 linked violation
October 18, 2023State Public Notification requested3 linked violations
October 18, 2023State Violation/Reminder Notice4 linked violations
July 8, 2022State Public Notification requested2 linked violations
June 23, 2022State Compliance achieved1 linked violation
January 24, 2014State Public Notification requested2 linked violations
October 30, 2013State Compliance achieved1 linked violation
May 15, 2009State Compliance achieved3 linked violations
May 15, 2009State Compliance achieved2 linked violations
May 6, 2009State Compliance achieved4 linked violations
December 31, 2008State Compliance achieved14 linked violations
September 17, 2008State Public Notification requested1 linked violation
September 17, 2008State Violation/Reminder Notice1 linked violation
February 24, 2005State Violation/Reminder Notice10 linked violations
February 24, 2005State Public Notification requested3 linked violations
February 24, 2005State Violation/Reminder Notice2 linked violations
April 28, 2004State Public Notification requested11 linked violations
April 28, 2004State Violation/Reminder Notice10 linked violations
April 21, 2004State Compliance achieved12 linked violations
December 2, 2002State Compliance achieved7 linked violations
September 24, 2001State Violation/Reminder Notice1 linked violation
September 24, 2001State Public Notification requested1 linked violation
June 19, 2001State Violation/Reminder Notice1 linked violation
June 19, 2001State Public Notification requested1 linked violation
May 14, 2001State Compliance achieved20 linked violations
May 28, 2000State Violation/Reminder Notice2 linked violations
December 31, 1993State Compliance achieved1 linked violation

Common questions

Is COLSTRIP CITY OF required to publish a Consumer Confidence Report?: Yes. COLSTRIP CITY OF 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 COLSTRIP CITY OF’s next Consumer Confidence Report due?: COLSTRIP CITY OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does COLSTRIP CITY OF have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for COLSTRIP CITY OF.
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

ZENT, PAT

406-720-0153

COLSTRIP, MT 59323