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

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

BOULDER 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.

BOULDER, MT · Jefferson County

BOULDER CITY OF Water System

Consumer Confidence Report status

BOULDER 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 3 items for BOULDER CITY OF that are open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

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): MT0000158
System type: Community Water System
Population served: 1,400
Service connections: 563
Ownership: local government
Water source: groundwater (wells)

BOULDER CITY OF is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 1,400 people from groundwater.

As of August 1, 2026, its federal record holds 38 entries between 2000 and 2024, of which 3 remain open; none are health-based.

Of the 38, 37 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 the Lead and Copper Rule, inorganic chemicals, and the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Violation history

Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2024 – December 31, 2024
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
July 1, 2022 – July 28, 2022
Resolved
Monitoring and Reporting (DBP)
—
TTHM
September 1, 2014 – August 31, 2015
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Barium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Nickel
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Barium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Chromium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Nickel
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Chromium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Selenium
January 1, 2011 – December 31, 2013
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2005 – June 30, 2005
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2005 – June 30, 2005
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 2003 – June 1, 2006
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2003 – June 30, 2003
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
October 1, 2002
Addressed
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 2002
Addressed
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 2001
Addressed
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2001 – December 31, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2001 – June 30, 2001
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2000 – December 31, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2000 – June 30, 2000
Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmation

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2024 – December 31, 2024	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2022 – July 28, 2022	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2014 – August 31, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Barium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Nickel	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Barium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Chromium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Nickel	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Chromium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Selenium	—	Resolved
January 1, 2005 – June 30, 2005	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2005 – June 30, 2005	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2003 – June 1, 2006	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 2003 – June 30, 2003	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
October 1, 2002	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Addressed
July 1, 2002	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Addressed
July 1, 2001	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Addressed
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2001 – June 30, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2000 – December 31, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
January 1, 2000 – June 30, 2000	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved

Resolved addressed and confirmed by the stateAddressed corrective action reported, pending final confirmation

Enforcement actions

January 23, 2025State Compliance achieved2 linked violations
January 23, 2025State Violation/Reminder Notice2 linked violations
January 23, 2025State Public Notification requested2 linked violations
July 28, 2022State Compliance achieved1 linked violation
July 28, 2022State Public Notification requested1 linked violation
July 28, 2022State Violation/Reminder Notice1 linked violation
July 28, 2022State Public Notification received1 linked violation
October 15, 2018State Public Notification requested1 linked violation
October 15, 2018State Violation/Reminder Notice1 linked violation
September 26, 2018State Compliance achieved1 linked violation
November 3, 2016State Compliance achieved10 linked violations
October 25, 2016State Compliance achieved10 linked violations
October 25, 2016State Compliance achieved10 linked violations
August 9, 2016State Compliance achieved2 linked violations
October 19, 2015State Public Notification requested2 linked violations
October 19, 2015State Violation/Reminder Notice2 linked violations
January 15, 2015State Public Notification received31 linked violations
January 24, 2014State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
January 24, 2014State Public Notification requested10 linked violations
January 24, 2014State Public Notification requested10 linked violations
January 24, 2014State Public Notification requested10 linked violations
January 24, 2014State Violation/Reminder Notice10 linked violations
January 24, 2014State Violation/Reminder Notice10 linked violations
January 24, 2014State Violation/Reminder Notice10 linked violations
October 12, 2010State Public Notification received1 linked violation
May 20, 2008State Compliance achieved36 linked violations
March 29, 2007State Compliance achieved1 linked violation
October 23, 2006State Compliance achieved1 linked violation
September 25, 2006State Public Notification requested1 linked violation
September 25, 2006State Violation/Reminder Notice1 linked violation
September 25, 2006State Violation/Reminder Notice1 linked violation
February 22, 2006State Public Notification requested1 linked violation
September 21, 2005State Compliance achieved6 linked violations
August 19, 2005State Violation/Reminder Notice1 linked violation
April 12, 2005State Compliance achieved1 linked violation
March 28, 2005State Public Notification requested1 linked violation
March 28, 2005State Violation/Reminder Notice1 linked violation
January 4, 2005State Public Notification requested2 linked violations
January 4, 2005State Violation/Reminder Notice2 linked violations
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice5 linked violations
January 3, 2005State Public Notification requested5 linked violations
January 3, 2005State Violation/Reminder Notice5 linked violations
January 3, 2005State Public Notification requested5 linked violations
January 3, 2005State Public Notification requested5 linked violations
January 3, 2005State Violation/Reminder Notice5 linked violations
January 3, 2005State Public Notification requested5 linked violations
January 3, 2005State Violation/Reminder Notice1 linked violation
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice1 linked violation
January 3, 2005State Violation/Reminder Notice2 linked violations
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice1 linked violation
January 3, 2005State Public Notification requested1 linked violation
March 18, 2004State Other39 linked violations
January 21, 2004State Violation/Reminder Notice1 linked violation
January 21, 2004State Public Notification requested1 linked violation
March 11, 2003State Public Notification received1 linked violation
March 11, 2003State Compliance achieved1 linked violation
October 29, 2002State Public Notification requested1 linked violation
October 29, 2002State Violation/Reminder Notice1 linked violation
October 29, 2002State Violation/Reminder Notice2 linked violations
June 18, 2002State Violation/Reminder Notice2 linked violations
June 6, 2001State Compliance achieved1 linked violation
June 6, 2001State Compliance achieved1 linked violation
December 16, 2000State Boil Water Order5 linked violations
December 16, 2000State Violation/Reminder Notice6 linked violations
December 16, 2000State Violation/Reminder Notice5 linked violations
June 21, 2000State Violation/Reminder Notice1 linked violation
June 21, 2000State Public Notification requested1 linked violation
June 21, 2000State Violation/Reminder Notice1 linked violation
December 11, 1998State Violation/Reminder Notice1 linked violation
December 11, 1998State Public Notification requested1 linked violation
December 9, 1998State Violation/Reminder Notice1 linked violation

Common questions

Is BOULDER CITY OF required to publish a Consumer Confidence Report?: Yes. BOULDER 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 BOULDER CITY OF’s next Consumer Confidence Report due?: BOULDER CITY OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does BOULDER CITY OF have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 3 items for BOULDER CITY OF that are open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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

BULLOCK, BRIAN

406-225-3381

BOULDER, MT 59632