BUTTE, MT · Silver Bow County
BUTTE SILVERBOW WATER DEPT Water System
Consumer Confidence Report status
BUTTE SILVERBOW WATER DEPT 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 BUTTE SILVERBOW WATER DEPT.
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)
- MT0000170
- System type
- Community Water System
- Population served
- 33,000
- Service connections
- 12,958
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
BUTTE SILVERBOW WATER DEPT is among the 6 largest community water systems in Montana, serving 33,000 people from surface water.
As of August 1, 2026, its federal record holds 65 entries between 1993 and 2025, all of which EPA lists as closed.
Of the 65, 61 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 volatile organic chemicals, the Total Coliform Rules, and inorganic chemicals.
Violation history
Consumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2025 – October 20, 2025
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2024 – March 31, 2024
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2024 – March 31, 2024
ResolvedFailure to Filter (SWTR)
Health-basedSurface Water Treatment Rule
April 24, 2012 – May 16, 2017
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
April 1, 2012 – April 25, 2012
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Nitrate-Nitrite
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Benzene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Toluene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Styrene
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Arsenic
January 1, 2012 – December 31, 2012
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTotal Haloacetic Acids (HAA5)
April 1, 2011 – June 30, 2011
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTotal Haloacetic Acids (HAA5)
July 1, 2010 – September 30, 2010
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2006 – March 31, 2006
ResolvedMonitoring, Regular
—Styrene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Benzene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Toluene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Benzene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Toluene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2000 – December 31, 2000
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
June 1, 1997 – June 30, 1997
ResolvedMonitoring, Repeat Major (TCR)
—Coliform (TCR)
July 1, 1995 – July 31, 1995
ResolvedMonitoring, Repeat Major (TCR)
—Coliform (TCR)
January 1, 1995 – January 31, 1995
ResolvedMonitoring, Repeat Major (TCR)
—Coliform (TCR)
April 1, 1994 – April 30, 1994
ResolvedMonitoring, Repeat Major (TCR)
—Coliform (TCR)
July 1, 1993 – July 31, 1993
ResolvedMonitoring, Regular
—Nitrate
January 1, 1993 – December 31, 1993
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2025 – October 20, 2025 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| January 1, 2024 – March 31, 2024 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2024 – March 31, 2024 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| April 24, 2012 – May 16, 2017 | Failure to Filter (SWTR) | Surface Water Treatment Rule | Health-based | Resolved |
| April 1, 2012 – April 25, 2012 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Nitrate-Nitrite | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring, Regular | Arsenic | — | Resolved |
| April 1, 2011 – June 30, 2011 | Maximum Contaminant Level Violation, Average | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| July 1, 2010 – September 30, 2010 | Maximum Contaminant Level Violation, Average | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| January 1, 2006 – March 31, 2006 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2000 – December 31, 2000 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| June 1, 1997 – June 30, 1997 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 1995 – July 31, 1995 | Monitoring, Repeat Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 1995 – January 31, 1995 | Monitoring, Repeat Major (TCR) | Coliform (TCR) | — | Resolved |
| April 1, 1994 – April 30, 1994 | Monitoring, Repeat Major (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 1993 – July 31, 1993 | Monitoring, Repeat Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 1993 – December 31, 1993 | Monitoring, Regular | Nitrate | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- April 18, 2024State Public Notification requested4 linked violations
- November 20, 2013State Administrative/Compliance Order without penalty issued1 linked violation
- June 1, 2013State Public Notification received23 linked violations
- February 4, 2013State Compliance achieved22 linked violations
- February 4, 2013State Compliance achieved22 linked violations
- January 18, 2013State Public Notification requested1 linked violation
- January 18, 2013State Violation/Reminder Notice1 linked violation
- January 11, 2013State Public Notification requested21 linked violations
- January 11, 2013State Violation/Reminder Notice1 linked violation
- January 11, 2013State Public Notification requested1 linked violation
- January 11, 2013State Violation/Reminder Notice21 linked violations
- May 15, 2012State Public Notification requested1 linked violation
- May 15, 2012State Violation/Reminder Notice2 linked violations
- May 11, 2012State Public Notification received1 linked violation
- April 25, 2012State Other1 linked violation
- April 24, 2012State Public Notification requested2 linked violations
- March 9, 2012State Compliance achieved12 linked violations
- February 11, 2011State Compliance achieved3 linked violations
- October 25, 2010State Public Notification received2 linked violations
- September 8, 2010State Violation/Reminder Notice8 linked violations
- December 30, 2008State Compliance achieved12 linked violations
- July 28, 2008State Compliance achieved2 linked violations
- December 2, 2002State Compliance achieved43 linked violations
- August 28, 2002State Public Notification received23 linked violations
- June 29, 2002State Violation/Reminder Notice24 linked violations
- June 29, 2002State Public Notification requested23 linked violations
- June 24, 2002State Compliance achieved1 linked violation
- March 1, 1992State Civil Case filed in State court1 linked violation
- April 22, 1991Federal SDWA Section 1431 (Emergency) Ordergeneral compliance action — not tied to a specific violation on record
- March 5, 1991Federal issued Formal Notice of Violationgeneral compliance action — not tied to a specific violation on record
Common questions
Is BUTTE SILVERBOW WATER DEPT required to publish a Consumer Confidence Report?
- Yes. BUTTE SILVERBOW WATER DEPT 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 BUTTE SILVERBOW WATER DEPT’s next Consumer Confidence Report due?
- BUTTE SILVERBOW WATER DEPT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does BUTTE SILVERBOW WATER DEPT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for BUTTE SILVERBOW WATER DEPT.
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
NEARY, MARK
406-497-6519
BUTTE, MT 59701