Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	080890010
PWS Name	TOWAOC WATER SYSTEM
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Surface water purchased
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	2020
County Served

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	50859	Known	01-OCT-2025	31-DEC-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50857	Known	01-JAN-2025	31-MAR-2025	Yes
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	50856	Open	30-DEC-2024	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50854	Returned to Compliance	01-JUL-2024	30-SEP-2024	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	50851	Returned to Compliance	01-DEC-2023	31-DEC-2023	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	50849	Open	01-OCT-2023	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	50850	Returned to Compliance	11-JUL-2023	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	50847	Returned to Compliance	01-JUN-2023	30-JUN-2023	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	50845	Returned to Compliance	01-FEB-2023	28-FEB-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	50846	Returned to Compliance	01-FEB-2023	28-FEB-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	50840	Returned to Compliance	01-DEC-2022	31-DEC-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	50844	Returned to Compliance	01-NOV-2022	31-JAN-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50843	Returned to Compliance	01-NOV-2022	31-JAN-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	50842	Returned to Compliance	01-AUG-2022	31-OCT-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50841	Returned to Compliance	01-AUG-2022	31-OCT-2022	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	50839	Returned to Compliance	01-JUL-2022	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	50838	Returned to Compliance	11-OCT-2021	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	50848	Open	01-OCT-2021	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50833	Returned to Compliance	01-NOV-2019	31-JAN-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	50834	Returned to Compliance	01-NOV-2019	31-JAN-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	50830	Returned to Compliance	01-FEB-2019	30-APR-2019	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	50826	Returned to Compliance	01-OCT-2018	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	50821	Returned to Compliance	01-JUL-2018	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	50820	Returned to Compliance	01-JUN-2018	30-JUN-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	50825	Returned to Compliance	01-FEB-2018	30-APR-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50824	Returned to Compliance	01-FEB-2018	30-APR-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50822	Returned to Compliance	01-FEB-2017	30-APR-2017	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	50823	Returned to Compliance	01-FEB-2017	30-APR-2017	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	50816	Returned to Compliance	01-JAN-2012	31-JAN-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	50817	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	Stage 2 Disinfectants and Disinfection Byproducts Rule	50815	Returned to Compliance	01-JUL-2010	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	50809	Returned to Compliance	01-JUL-2008	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	50707	Returned to Compliance	01-OCT-2006	-	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	50504	Returned to Compliance	01-JUL-2003	31-JUL-2003	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	50302	Returned to Compliance	01-JUL-2002	31-JUL-2002	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	50605	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	299	Known	01-AUG-1999	31-AUG-1999	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	199	Known	01-MAY-1999	31-MAY-1999	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	198	Known	01-AUG-1998	31-AUG-1998	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	50198	Returned to Compliance	01-JUL-1998	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	297	Known	01-SEP-1996	30-SEP-1996	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	196	Known	01-JUN-1996	30-JUN-1996	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3096	Known	01-SEP-1995	30-SEP-1995	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	3095	Known	01-SEP-1995	30-SEP-1995	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2996	Known	01-AUG-1995	31-AUG-1995	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2995	Known	01-AUG-1995	31-AUG-1995	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2895	Known	01-JUL-1995	31-JUL-1995	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2695	Known	01-SEP-1994	30-SEP-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2694	Known	01-SEP-1994	30-SEP-1994	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2594	Known	01-JUL-1994	31-JUL-1994	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
17094	50859	SIF	State Public Notification received	05-DEC-2025	Region	PN received via email - BCS 12/8/2025
17091	50857	SIF	State Public Notification received	01-MAY-2025	Region	Received PN via email -BCS 5/1/2025
17086	50854	SIF	State Public Notification received	06-DEC-2024	Region	PN received via email on 12/6/24-MRF(12/6/24)
17077	50851	SOX	State Compliance achieved	22-FEB-2024	Region	-
17073	50844	SOX	State Compliance achieved	07-DEC-2023	Region	-
17073	50843	SOX	State Compliance achieved	07-DEC-2023	Region	-
17073	50842	SOX	State Compliance achieved	07-DEC-2023	Region	-
17073	50841	SOX	State Compliance achieved	07-DEC-2023	Region	-
17072	50850	SOX	State Compliance achieved	27-NOV-2023	Region	PWS RTC'd when they collected 1 sample on 6/13/23 and EPA received it on 7/14/23. The FTR letter was emailed 7/16/23. JSH 11/27/23
17068	50845	SOX	State Compliance achieved	27-NOV-2023	Region	PWS RTC'd when they collected 2 samples on 3/8/23. JSH 11/27/23
17063	50849	SIA	State Violation/Reminder Notice	08-NOV-2023	Region	Failure to submit CCR Cert on time- BS
17069	50847	SOX	State Compliance achieved	14-JUL-2023	Region	PWS RTC'd when they collected 1 sample on 6/13/23 and EPA received it on 7/14/23. JSH 11/27/23
17059	50846	SOX	State Compliance achieved	12-APR-2023	Region	All required samples received for March 2023 and indicated a detectable residual.
17052	50840	SOX	State Compliance achieved	14-FEB-2023	Region	January sample collected and reported as required.
17062	50839	SOX	State Compliance achieved	12-DEC-2022	Region	RTC 12/12/2022 -BS
17048	50838	SOX	State Compliance achieved	28-OCT-2021	Region	Our office didn’t receive the September 2021 results until October 28, 2021. In addition, the June 2021 results weren’t received until July 15, 2021 and the February 2021 results weren’t received until March 11, 2021. JSH 12/10/2021
17045	50834	SOX	State Compliance achieved	05-JUN-2020	Region	2nd quarter 2020 sample collected. swt 6/5/2020
17045	50833	SOX	State Compliance achieved	05-JUN-2020	Region	2nd quarter 2020 sample collected. swt 6/5/2020
17040	50830	SOX	State Compliance achieved	13-MAR-2020	Region	-
17035	50821	SOX	State Compliance achieved	31-MAY-2019	Region	-
17034	50826	SOX	State Compliance achieved	04-FEB-2019	Region	-
17032	50824	SOX	State Compliance achieved	26-OCT-2018	Region	Samples collected on 7/6/2018 swt 10/26/2018.
17032	50825	SOX	State Compliance achieved	26-OCT-2018	Region	Samples collected on 7/6/2018 swt 10/26/2018.
17028	50823	SOX	State Compliance achieved	24-AUG-2018	Region	Letter was issued; however, auditing 8/24/2018, the violation was not added in SDWIS. Add violation and SOXing in accordance with official letters. swt 8/24/2018
17028	50822	SOX	State Compliance achieved	24-AUG-2018	Region	Letter was issued; however, auditing 8/24/2018, the violation was not added in SDWIS. Add violation and SOXing in accordance with official letters. swt 8/24/2018
17031	50820	SOX	State Compliance achieved	05-JUL-2018	Region	PWS RTC'd when they collected two samples on 07/05/18. EPA received the results 7/13/18. JSH 10/19/18
17020	50817	SOX	State Compliance achieved	16-JUL-2015	Region	-
17017	50815	SOX	State Compliance achieved	13-MAY-2013	Region	-
17014	50816	SOX	State Compliance achieved	02-JUL-2012	Region	Results for Jan samples received in April. BB
17013	50605	SOX	State Compliance achieved	16-JUN-2010	Region	-
17012	50504	SOX	State Compliance achieved	10-JUN-2010	Region	SOX for data cleanup.llw
17012	50302	SOX	State Compliance achieved	10-JUN-2010	Region	SOX for data cleanup.llw
17008	50809	SOX	State Compliance achieved	24-SEP-2008	Region	sent email of inadequacy on 07/02/08; NONC senton 09/04/08 when no action taken by system jll
17011	50707	SOX	State Compliance achieved	05-SEP-2007	Region	Historical RTC that was previously missed.
7201	50198	SOX	State Compliance achieved	28-FEB-2001	Region	WS MONITORED PB/CU ON 7-12/99 &1-6/99.

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CONSECUTIVE CONNECTION	12278	Yes	Consecutive Connection	Surface water	Permanent	Active
TOWAOC - UTE MTN TRIBAL COUNCIL	11299	No	Distribution System/Zone	-	-	Active
LOWER TANK 885K GAL	11487	No	Storage	-	-	Active
MIDDLE TANK 688K GAL	11488	No	Storage	-	-	Active
UPPER TANK 289K GAL	11490	No	Storage	-	-	Active
NEW MANCOS CREEK TANK #02 30K GAL	12564	No	Storage	-	-	Active
MANCOS CREEK TANK #01 24K GAL	11489	No	Storage	-	-	Inactive
TOWAOC BLDG CONTROL VAULT WITH CL	11441	No	Treatment Plant	-	-	Active
MANCOS CREEK CONTROL VAULT WITH CL	12307	No	Treatment Plant	-	-	Inactive

1 - 9 of 9

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TOWAOC BLDG CONTROL VAULT WITH CL	11441	Hypochlorination, Post	Disinfection
MANCOS CREEK CONTROL VAULT WITH CL	12307	Hypochlorination, Post	Disinfection

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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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