BOULDER, MT · Jefferson County

BOULDER CITY OF Water System

Current status

4 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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

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
—
Antimony, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Nickel
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Fluoride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Chromium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – December 31, 2013
Archived
Monitoring, Regular
—
Selenium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Chromium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Barium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Nickel
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
—
Selenium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2011 – December 31, 2013
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
June 1, 2006 – March 29, 2007
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2006 – June 30, 2006
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
October 1, 2004 – June 2, 2006
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
July 1, 2004 – December 31, 2004
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
October 1, 2003
Addressed
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
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2002 – October 31, 2002
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
October 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
July 1, 2001 – December 31, 2001
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 2001
Addressed
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
January 1, 2000 – June 30, 2000
Resolved
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 2000 – June 30, 2000
Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)Addressed 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	Antimony, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Nickel	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Fluoride	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Chromium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Asbestos	—	Archived
January 1, 2011 – December 31, 2013	Monitoring, Regular	Selenium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Chromium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Barium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Nickel	—	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	Selenium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
June 1, 2006 – March 29, 2007	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
January 1, 2006 – June 30, 2006	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
October 1, 2004 – June 2, 2006	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
July 1, 2004 – December 31, 2004	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
October 1, 2003	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Addressed
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 – October 31, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2002	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Addressed
October 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
July 1, 2001 – December 31, 2001	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved
July 1, 2001	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Addressed
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
January 1, 2000 – June 30, 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 stateArchived closed in EPA's records (typically due to age or a data correction)Addressed corrective action reported, pending final confirmation

Enforcement actions

January 23, 2025State Violation/Reminder Notice2 linked violations
January 23, 2025State Compliance achieved2 linked violations
January 23, 2025State Public Notification requested2 linked violations
July 28, 2022State Public Notification requested1 linked violation
July 28, 2022State Violation/Reminder Notice1 linked violation
July 28, 2022State Public Notification received1 linked violation
July 28, 2022State Compliance achieved1 linked violation
October 15, 2018State Violation/Reminder Notice1 linked violation
October 15, 2018State Public Notification requested1 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 Violation/Reminder Notice2 linked violations
October 19, 2015State Public Notification requested2 linked violations
January 15, 2015State Public Notification received31 linked violations
January 24, 2014State Violation/Reminder Notice10 linked violations
January 24, 2014State Public Notification requested10 linked violations
January 24, 2014State Violation/Reminder Notice10 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 Violation/Reminder Notice10 linked violations
January 24, 2014State Public Notification requested10 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 Violation/Reminder Notice1 linked violation
September 25, 2006State Public Notification requested1 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
August 19, 2005State Violation/Reminder Notice4 linked violations
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 Violation/Reminder Notice2 linked violations
January 4, 2005State Public Notification requested2 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 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 Notice5 linked violations
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice1 linked violation
January 3, 2005State Public Notification requested1 linked violation
January 3, 2005State Violation/Reminder Notice2 linked violations
March 18, 2004State Other39 linked violations
January 21, 2004State Public Notification requested1 linked violation
January 21, 2004State Violation/Reminder Notice1 linked violation
March 11, 2003State Compliance achieved1 linked violation
March 11, 2003State Public Notification received1 linked violation
October 29, 2002State Violation/Reminder Notice1 linked violation
October 29, 2002State Public Notification requested1 linked violation
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
June 21, 2000State Violation/Reminder Notice1 linked violation
June 21, 2000State Violation/Reminder Notice1 linked violation
June 21, 2000State Public Notification requested1 linked violation
December 11, 1998State Violation/Reminder Notice1 linked violation
December 11, 1998State Public Notification requested1 linked violation

Contact

BULLOCK, BRIAN

406-225-3381

BOULDER, MT 59632