HELENA, MT · Lewis and Clark County

HELENA WATER SYSTEM 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): MT0000241
System type: Community Water System
Population served: 32,091
Service connections: 11,684
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2023 – March 31, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2022 – December 31, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2022 – September 30, 2022
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2011 – November 7, 2011
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2011 – October 28, 2013
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 2008 – October 31, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2008 – December 31, 2016
Archived
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2006 – June 30, 2006
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2006 – June 30, 2006
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2006 – March 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2005 – December 31, 2005
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2001 – August 15, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 1998 – August 31, 1998
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1993 – December 31, 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
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2022 – December 31, 2022	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2022 – September 30, 2022	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2011 – November 7, 2011	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
January 1, 2011 – October 28, 2013	Monitoring, Regular	Asbestos	—	Resolved
October 1, 2008 – October 31, 2008	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2008 – September 30, 2008	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2008 – December 31, 2016	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
October 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
April 1, 2006 – June 30, 2006	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2006 – June 30, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
October 1, 2001 – August 15, 2002	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
August 1, 1998 – August 31, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1993 – December 31, 1993	Monitoring, Regular	Nitrate	—	Resolved

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

Enforcement actions

May 10, 2023State Compliance achieved1 linked violation
May 10, 2023State Compliance achieved1 linked violation
May 10, 2023State Compliance achieved1 linked violation
February 24, 2023State Violation/Reminder Notice1 linked violation
February 24, 2023State Public Notification requested1 linked violation
November 25, 2022State Public Notification requested1 linked violation
November 25, 2022State Violation/Reminder Notice1 linked violation
September 29, 2022State Violation/Reminder Notice1 linked violation
September 29, 2022State Public Notification requested1 linked violation
January 24, 2014State Violation/Reminder Notice1 linked violation
January 24, 2014State Public Notification requested1 linked violation
October 28, 2013State Compliance achieved1 linked violation
November 7, 2011State Compliance achieved1 linked violation
October 31, 2011State Public Notification requested1 linked violation
October 31, 2011State Violation/Reminder Notice1 linked violation
September 25, 2009State Compliance achieved3 linked violations
September 25, 2009State Compliance achieved1 linked violation
September 25, 2009State Compliance achieved1 linked violation
July 16, 2009State Compliance achieved1 linked violation
February 26, 2009State Compliance achieved1 linked violation
October 10, 2008State Public Notification received1 linked violation
September 11, 2008State Violation/Reminder Notice1 linked violation
September 11, 2008State Violation/Reminder Notice1 linked violation
July 14, 2008State Public Notification requested1 linked violation
July 14, 2008State Violation/Reminder Notice2 linked violations
July 14, 2008State Violation/Reminder Notice1 linked violation
July 14, 2008State Public Notification requested1 linked violation
June 1, 2008State Public Notification received1 linked violation
January 19, 2008State Public Notification requested2 linked violations
April 29, 2007State Public Notification requested2 linked violations
February 28, 2006State Compliance achieved2 linked violations
February 10, 2006State Public Notification requested1 linked violation
February 10, 2006State Violation/Reminder Notice1 linked violation
February 9, 2006State Public Notification requested1 linked violation
February 9, 2006State Violation/Reminder Notice1 linked violation
August 15, 2002State Compliance achieved1 linked violation

Contact

SANDERSON, JANICE R

406-457-8512

HELENA, MT 59602