Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MT0000170
PWS Name	BUTTE SILVERBOW WATER DEPT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	33000
County Served	Silver Bow

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	1540540	Returned to Compliance	01-OCT-2025	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1540539	Returned to Compliance	01-JAN-2024	31-MAR-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	1540538	Returned to Compliance	01-JAN-2024	31-MAR-2024	No
TT	Failure to Filter (SWTR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1540511	Returned to Compliance	24-APR-2012	-	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1540512	Returned to Compliance	01-APR-2012	30-APR-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	1540531	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	1540530	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	1540529	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	1540528	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	1540526	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	1540525	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	1540524	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	1540523	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	1540522	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	1540521	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	1540520	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	1540519	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	1540518	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	1540517	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	1540516	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	1540515	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	1540514	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	1540532	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1540533	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	1540534	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	1540535	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	1540536	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	1540527	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1540510	Returned to Compliance	01-APR-2011	30-JUN-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1540509	Returned to Compliance	01-JUL-2010	30-SEP-2010	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	1540307	Returned to Compliance	01-JAN-2006	31-MAR-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1540407	Returned to Compliance	01-JAN-2006	31-MAR-2006	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	201	Returned to Compliance	01-SEP-2000	30-SEP-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	1532202	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	1523502	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	1527802	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	1533502	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	1527402	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	1533102	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1527302	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	1533002	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	1532902	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	1527202	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	1527102	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	1532802	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	1532602	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	1526902	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	1532402	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	1526702	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	1526602	Returned to Compliance	01-JAN-2000	31-DEC-2000	No

1 - 50 of 88

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5552462	1540540	SOX	State Compliance achieved	20-OCT-2025	State	1/6/2026 Certification Form received on 10/20/2025. KK;
5552459	1540538	SIE	State Public Notification requested	18-APR-2024	State	-
5552459	1540539	SIE	State Public Notification requested	18-APR-2024	State	-
5552456	1540511	SOX	State Compliance achieved	16-MAY-2017	State	ENG Cert Letter rec'd. Filtration in place for Basin Creek Res Source. LMK
5552451	1540516	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540515	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540518	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540519	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540520	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540521	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540522	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540523	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540524	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540525	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540526	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540527	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540528	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540529	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540530	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540531	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540532	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540533	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540534	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540535	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540536	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540514	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552451	1540517	SIF	State Public Notification received	01-JUN-2013	State	Mailed to all customers CCR
5552431	1540512	SIE	State Public Notification requested	15-MAY-2012	State	-
5552424	1540510	SOX	State Compliance achieved	09-MAR-2012	State	RETURNED TO COMPLIANCE WITH HAA5-RAA. J Jose
5552420	1540509	SOX	State Compliance achieved	11-FEB-2011	State	RTC QT_4_2010. J. Jose
5552409	969795	SOX	State Compliance achieved	15-MAY-2009	State	SOX-RTC MIGRATION 5/15/09
5552309	414794	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	372494	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	244497	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	218393	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	190593	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	158595	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	58495	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	201	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	628794	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	761097	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	833595	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552309	1514996	SOX	State Compliance achieved	30-DEC-2008	State	6 months no MCL or MR violations. LRA 12/30/2008
5552208	1540407	SOX	State Compliance achieved	28-JUL-2008	State	Samples taken 10/19/2006.
5552208	1540307	SOX	State Compliance achieved	28-JUL-2008	State	Samples taken 10/19/2006.
5551303	1527302	SOX	State Compliance achieved	02-DEC-2002	State	-
5551303	1527402	SOX	State Compliance achieved	02-DEC-2002	State	-
5551303	1527802	SOX	State Compliance achieved	02-DEC-2002	State	-
5551303	1529202	SOX	State Compliance achieved	02-DEC-2002	State	-
5551303	1529302	SOX	State Compliance achieved	02-DEC-2002	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INTAKE FISH CREEK	16087	Yes	Intake	Surface water	Permanent	Active
RESERVOIR MOULTON	17708	Yes	Reservoir	Surface water	Permanent	Active
RESERVOIR BASIN CREEK	17707	Yes	Reservoir	Surface water	Permanent	Active
RESERVOIR SOUTH FORK	17706	Yes	Reservoir	Surface water	Permanent	Active
INTAKE BIG HOLE RIVER	8904	Yes	Intake	Surface water	Permanent	Inactive
INTAKE SOUTH FORK RESERVOIR	9839	Yes	Intake	Surface water	Permanent	Active
INTAKE MOULTON RESERVOIR	9698	Yes	Intake	Surface water	Permanent	Active
INTAKE BASIN CREEK RES	8137	Yes	Intake	Surface water	Permanent	Active
INTAKE BIG HOLE RIVER	20037	Yes	Intake	Surface water	Permanent	Active
CH FOR BIG HOLE RIV AND SOUTH FORK RES	12663	No	Common Headers	-	-	Active
CLEAR WELL FOR MOULTON	15114	No	Clear Well	-	-	Active
CLEARWELL FOR BIG HOLE WTP	19824	No	Clear Well	-	-	Active
DISTRIBUTION SYSTEM	10090	No	Distribution System/Zone	-	-	Active
SUMMIT VALLEY PUMPING STATION	12670	No	Pump Facility	-	-	Active
PUMP STATION WEST SIDE	14743	No	Pump Facility	-	-	Active
PUMP FACILITY MAIN STREET	14744	No	Pump Facility	-	-	Active
SOUTH SIDE PUMP STATION	17705	No	Pump Facility	-	-	Active
PUMP FACILITY BIG HOLE PUMP STATION (RAW	20038	No	Pump Facility	-	-	Active
PUMP FACILITY FOR BIG HOLE PUMP STATION	12664	No	Pump Facility	-	-	Inactive
HIGH SERVICE RESERVOIR 2.5 MG	12692	No	Storage	-	-	Active
STORAGE TANK COLORADO HILL 9 MG	16086	No	Storage	-	-	Active
WEST SIDE TANK 5MG GAL	845	No	Storage	-	-	Active
STORAGE TANK 1 - ANACONDA	1261	No	Storage	-	-	Inactive
SOUTH FORK RESERVOIR	12666	No	Storage	-	-	Inactive
SOUTH SIDE RESERVOIR TANK 4	12673	No	Storage	-	-	Inactive
BASIN CREEK RESERVOIR	12674	No	Storage	-	-	Inactive
MOULTON RESERVOIRS	12675	No	Storage	-	-	Inactive
STORAGE FACILITY BIG HOLE RIVER	2087	No	Storage	-	-	Inactive
CLEARWELL FOR MOULTON WTP	2362	No	Storage	-	-	Inactive
TRANSMISSION MAIN BIG HOLE RIVER	17709	No	Transmission Main (Manifold)	-	-	Active
TRANSMISSION MAIN S FORK RES	17710	No	Transmission Main (Manifold)	-	-	Active
TRANSMISSION MAIN FROM TP002	17711	No	Transmission Main (Manifold)	-	-	Active
TRANSMISSION MAIN FISH CREEK	17712	No	Transmission Main (Manifold)	-	-	Active
TRANSMISSION MAIN FROM TP004	17713	No	Transmission Main (Manifold)	-	-	Active
TRANSMISSION MAIN MOULTON IN005	17714	No	Transmission Main (Manifold)	-	-	Active
TP BASIN CREEK	13511	No	Treatment Plant	-	-	Active
TP FOR MOULTON RES	2424	No	Treatment Plant	-	-	Active
TP FOR BIG HOLE RIVER AND SF RES	3240	No	Treatment Plant	-	-	Active

1 - 38 of 38

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP BASIN CREEK	13511	Coagulation	Particulate removal
TP BASIN CREEK	13511	Gaseous Chlorination, Post	Disinfection
TP BASIN CREEK	13511	Flocculation	Particulate removal
TP BASIN CREEK	13511	Filtration, Rapid Sand	Particulate removal
TP BASIN CREEK	13511	pH Adjustment, Pre	Particulate removal
TP BASIN CREEK	13511	Inhibitor, Orthophosphate	Corrosion control
TP FOR MOULTON RES	2424	Flocculation	Particulate removal
TP FOR MOULTON RES	2424	Filtration, Rapid Sand	Particulate removal
TP FOR MOULTON RES	2424	Coagulation	Particulate removal
TP FOR MOULTON RES	2424	Inhibitor, Orthophosphate	Corrosion control
TP FOR MOULTON RES	2424	Sedimentation	Particulate removal
TP FOR MOULTON RES	2424	Hypochlorination, Post	Disinfection
TP FOR BIG HOLE RIVER AND SF RES	3240	Gaseous Chlorination, Post	Disinfection
TP FOR BIG HOLE RIVER AND SF RES	3240	Coagulation	Particulate removal
TP FOR BIG HOLE RIVER AND SF RES	3240	Sedimentation	Particulate removal
TP FOR BIG HOLE RIVER AND SF RES	3240	pH Adjustment, Pre	Particulate removal
TP FOR BIG HOLE RIVER AND SF RES	3240	Inhibitor, Orthophosphate	Corrosion control
TP FOR BIG HOLE RIVER AND SF RES	3240	Filtration, Rapid Sand	Particulate removal
TP FOR BIG HOLE RIVER AND SF RES	3240	Flocculation	Particulate removal

1 - 19 of 19

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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