GREAT FALLS, MT · Cascade County

GREAT FALLS CITY OF 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): MT0000525
System type: Community Water System
Population served: 60,000
Service connections: 22,477
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2019 – June 30, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2019 – March 31, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2018 – December 31, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2018 – September 30, 2018
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Asbestos
January 1, 2002 – December 31, 2010
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 1997 – August 31, 1997
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
April 1, 2019 – June 30, 2019	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2019 – March 31, 2019	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2018 – September 30, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2002 – December 31, 2010	Monitoring, Regular	Asbestos	—	Archived
August 1, 1997 – August 31, 1997	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved

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

Enforcement actions

August 22, 2019State Compliance achieved1 linked violation
August 22, 2019State Compliance achieved1 linked violation
August 22, 2019State Compliance achieved1 linked violation
August 22, 2019State Compliance achieved1 linked violation
August 22, 2019State Compliance achieved1 linked violation
June 7, 2019State Violation/Reminder Notice1 linked violation
June 7, 2019State Public Notification requested1 linked violation
March 1, 2019State Public Notification requested1 linked violation
March 1, 2019State Violation/Reminder Notice1 linked violation
November 30, 2018State Violation/Reminder Notice1 linked violation
November 30, 2018State Public Notification requested1 linked violation
August 28, 2018State Public Notification requested1 linked violation
August 28, 2018State Violation/Reminder Notice1 linked violation
July 3, 2018State Public Notification received1 linked violation
June 11, 2018State Public Notification requested1 linked violation
June 11, 2018State Violation/Reminder Notice1 linked violation
July 28, 2008State Compliance achieved2 linked violations
April 29, 2007State Violation/Reminder Notice2 linked violations
April 29, 2007State Public Notification requested2 linked violations
May 30, 2001State Compliance achieved1 linked violation
May 30, 2001State Public Notification requested1 linked violation

Contact

MCRADY, CODY

406-727-1325

GREAT FALLS, MT 59403