GREAT FALLS, MT · Cascade County
GREAT FALLS CITY OF Water System
Consumer Confidence Report status
GREAT FALLS 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 GREAT FALLS 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)
- 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)
GREAT FALLS CITY OF is the fourth largest community water system in Montana, serving 60,000 people from surface water.
As of August 1, 2026, its federal record holds 7 entries between 1997 and 2019, all of which EPA lists as closed. Nothing has been added since 2019.
Of the 7, 2 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 Stage 2 Disinfectants and Disinfection Byproducts Rule, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and inorganic chemicals.
Violation history
Maximum Contaminant Level Violation, Average
Health-basedTotal Haloacetic Acids (HAA5)
April 1, 2019 – June 30, 2019
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTotal Haloacetic Acids (HAA5)
January 1, 2019 – March 31, 2019
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTotal Haloacetic Acids (HAA5)
October 1, 2018 – December 31, 2018
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTotal Haloacetic Acids (HAA5)
July 1, 2018 – September 30, 2018
ResolvedMonitoring and Reporting (DBP)
—TTHM
October 1, 2006 – December 31, 2006
ResolvedMonitoring, Regular
—Asbestos
January 1, 2002 – December 31, 2010
ArchivedTreatment Technique (SWTR and GWR)
Health-basedSurface 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
Common questions
Is GREAT FALLS CITY OF required to publish a Consumer Confidence Report?
- Yes. GREAT FALLS 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 GREAT FALLS CITY OF’s next Consumer Confidence Report due?
- GREAT FALLS CITY OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does GREAT FALLS CITY OF have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for GREAT FALLS 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
HICKMAN, SHAWN
406-727-1325
GREAT FALLS, MT 59403