Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MT0000180
PWS Name	COLSTRIP CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	2350
County Served	Rosebud

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
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	980621	Returned to Compliance	01-JUL-2024	30-SEP-2024	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	980620	Returned to Compliance	01-JUL-2024	31-JUL-2024	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	980618	Returned to Compliance	01-JAN-2024	31-JAN-2024	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	980617	Returned to Compliance	01-JAN-2024	31-JAN-2024	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	980619	Returned to Compliance	01-JAN-2024	31-JAN-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	980615	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	980616	Returned to Compliance	01-JUL-2023	30-SEP-2023	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	980614	Returned to Compliance	01-MAY-2022	31-MAY-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	980611	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	980208	Returned to Compliance	01-AUG-2008	31-AUG-2008	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	980108	Returned to Compliance	01-SEP-2007	30-SEP-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	979505	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	979305	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	979105	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	979405	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	978905	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	979705	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	975103	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	974703	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	975403	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	975003	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	975203	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	974803	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	975303	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	974503	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	974603	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	974903	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	974304	Returned to Compliance	01-OCT-2001	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	100	Returned to Compliance	01-APR-2000	30-APR-2000	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	972101	Returned to Compliance	01-JAN-2000	31-DEC-2000	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	974002	Returned to Compliance	01-JAN-1999	31-DEC-1999	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	516498	Returned to Compliance	01-JUN-1998	30-JUN-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	797499	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	797699	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	797799	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	797899	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	796999	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	797099	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	797399	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	797599	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	797299	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	797199	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	69699	Returned to Compliance	01-JAN-1996	31-DEC-1996	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	69999	Returned to Compliance	01-JAN-1996	31-DEC-1996	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	69799	Returned to Compliance	01-JAN-1996	31-DEC-1996	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	69299	Returned to Compliance	01-JAN-1996	31-DEC-1996	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	69499	Returned to Compliance	01-JAN-1996	31-DEC-1996	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	69899	Returned to Compliance	01-JAN-1996	31-DEC-1996	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	70099	Returned to Compliance	01-JAN-1996	31-DEC-1996	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	69599	Returned to Compliance	01-JAN-1996	31-DEC-1996	No

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5557541	980621	SOX	State Compliance achieved	20-DEC-2024	State	System returned to compliance 4QT24 with TTHM LRAA at 78ug/L. PMT 3/31/2025
5557538	980620	SOX	State Compliance achieved	23-AUG-2024	State	-
5557530	980618	SOX	State Compliance achieved	12-MAR-2024	State	System failed to monitor POE Cl2 due to a SCADA failure. JRS
5557526	980619	SOX	State Compliance achieved	12-MAR-2024	State	System failed to monitor IFE and CFE turbidity due to a SCADA failure. JRS
5557534	980617	SOX	State Compliance achieved	12-MAR-2024	State	System failed to monitor IFE NTU due to a SCADA failure. JRS
5557522	980616	SOX	State Compliance achieved	13-DEC-2023	State	04/29/2024 Violation SOX'd with sample taken on 12/13/2023 - CEO
5557522	980615	SOX	State Compliance achieved	13-DEC-2023	State	04/29/2024 Violation SOX'd with sample taken on 12/13/2023 - CEO
5557517	980614	SIE	State Public Notification requested	08-JUL-2022	State	-
5557511	980611	SIE	State Public Notification requested	24-JAN-2014	State	-
5557409	971995	SOX	State Compliance achieved	15-MAY-2009	State	SOX-RTC MIGRATION 5/15/09
5557509	69299	SOX	State Compliance achieved	15-MAY-2009	State	SOX-RTC MIGRATION 5/15/09
5557209	980208	SOX	State Compliance achieved	06-MAY-2009	State	6 months no MR or MCL violations. SWP 5/6/2009
5557209	980108	SOX	State Compliance achieved	06-MAY-2009	State	6 months no MR or MCL violations. SWP 5/6/2009
5556909	100	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5556909	516498	SOX	State Compliance achieved	31-DEC-2008	State	6 months no MCL or MR violations. LRA 12/31/2008
5555907	979405	SOX	State Compliance achieved	08-NOV-2006	State	-
5555907	979305	SOX	State Compliance achieved	08-NOV-2006	State	-
5555907	978905	SOX	State Compliance achieved	08-NOV-2006	State	-
5555907	979505	SOX	State Compliance achieved	08-NOV-2006	State	-
5555907	979705	SOX	State Compliance achieved	08-NOV-2006	State	-
5555907	979105	SOX	State Compliance achieved	08-NOV-2006	State	-
5555405	974304	SOX	State Compliance achieved	21-SEP-2005	State	RTC - Samples 11195 and 11196
5553304	975403	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	975303	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	975203	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	975103	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	975003	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	974903	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	974803	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	974703	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	974603	SIE	State Public Notification requested	28-APR-2004	State	-
5553304	974503	SIE	State Public Notification requested	28-APR-2004	State	-
5553003	972101	SOX	State Compliance achieved	03-DEC-2002	State	-
5552903	974002	SOX	State Compliance achieved	02-DEC-2002	State	-
4472601	797599	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	797499	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	797399	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	797299	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	797199	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	797099	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	796999	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	797799	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	70199	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	70099	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	69999	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	69899	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	69799	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	69699	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	69599	SOX	State Compliance achieved	14-MAY-2001	State	-
4472601	69499	SOX	State Compliance achieved	14-MAY-2001	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 CASTLE ROCK LAKE	9718	Yes	Intake	Surface water	Permanent	Active
CLEARWELL CONTACT BASIN	19356	No	Clear Well	-	-	Inactive
DISTRIBUTION SYSTEM	8734	No	Distribution System/Zone	-	-	Active
ZONE 2 RESERVOIR 2.0 MG	13364	No	Storage	-	-	Active
ZONE 3 RESERVOIR 0.40 MG	24121	No	Storage	-	-	Active
STORAGE FACILITY 1 ZONE 1	13362	No	Storage	-	-	Inactive
STORAGE FACILITY 2 ZONE 1	13363	No	Storage	-	-	Inactive
STORAGE FACILITY 4 ZONE 3 650,000 GAL	13365	No	Storage	-	-	Inactive
TREATMENT PLANT FOR CASTLE ROCK LAKE	2809	No	Treatment Plant	-	-	Active

1 - 9 of 9

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT FOR CASTLE ROCK LAKE	2809	Hypochlorination, Post	Disinfection
TREATMENT PLANT FOR CASTLE ROCK LAKE	2809	Fluoridation	Other
TREATMENT PLANT FOR CASTLE ROCK LAKE	2809	Permanganate	Taste / odor control
TREATMENT PLANT FOR CASTLE ROCK LAKE	2809	Coagulation	Particulate removal
TREATMENT PLANT FOR CASTLE ROCK LAKE	2809	Flocculation	Particulate removal
TREATMENT PLANT FOR CASTLE ROCK LAKE	2809	Filtration, Rapid Sand	Particulate removal

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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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