BUTTE, MT · Silver Bow County

BUTTE SILVERBOW WATER DEPT 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): 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)

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2025 – October 20, 2025
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2024 – March 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2024 – March 31, 2024
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
April 24, 2012 – May 16, 2017
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2012 – April 25, 2012
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Benzene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Toluene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Styrene
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2012 – December 31, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2011 – June 30, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2010 – September 30, 2010
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Benzene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Toluene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Styrene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Toluene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2000 – December 31, 2000
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
July 1, 1995 – July 31, 1995
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
January 1, 1995 – January 31, 1995
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
August 1, 1993 – August 31, 1993
Resolved
Monitoring, 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	Tetrachloroethylene	—	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	1,1,2-Trichloroethane	—	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	1,2-Dichloropropane	—	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	Styrene	—	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	o-Dichlorobenzene	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2000 – December 31, 2000	Monitoring, Regular	Xylenes, Total	—	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	Toluene	—	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	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
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
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
August 1, 1993 – August 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

October 6, 2025State Violation/Reminder Notice3 linked violations
April 18, 2024State Public Notification requested4 linked violations
May 16, 2017State Compliance achieved2 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 11, 2012State Public Notification received1 linked violation
April 25, 2012State Other1 linked violation
April 24, 2012State Public Notification requested2 linked violations
August 16, 2011State Public Notification received11 linked violations
February 11, 2011State Compliance achieved2 linked violations
September 8, 2010State Violation/Reminder Notice8 linked violations
May 15, 2009State Compliance achieved2 linked violations
December 30, 2008State Compliance achieved12 linked violations
July 28, 2008State Compliance achieved2 linked violations
December 2, 2002State Compliance achieved43 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
November 12, 2000State Violation/Reminder Notice17 linked violations
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

Contact

NEARY, MARK

406-497-6519

BUTTE, MT 59701