Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	NM3508817
PWS Name	THOREAU WATER & SANITATION DISTRICT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	1173
County Served	McKinley

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	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	43	Open	28-FEB-2026	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	44	Open	24-OCT-2025	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	42	Open	28-AUG-2025	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	36	Returned to Compliance	23-OCT-2024	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	37	Returned to Compliance	23-OCT-2024	-	Yes
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	39	Returned to Compliance	17-OCT-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	40	Returned to Compliance	17-OCT-2024	-	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	38	Returned to Compliance	01-OCT-2024	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	35	Returned to Compliance	01-OCT-2024	-	No
Other	Failure to Consult with State	Ground Water Rule	Groundwater Rule	32	Returned to Compliance	28-JUL-2024	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	34	Returned to Compliance	01-OCT-2022	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	31	Returned to Compliance	01-JUL-2022	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	24	Known	01-OCT-2019	31-DEC-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	21	Returned to Compliance	01-OCT-2019	31-DEC-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	20	Known	01-JUL-2019	30-SEP-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	30	Returned to Compliance	01-JUL-2019	30-SEP-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	26	Known	01-JUL-2019	30-SEP-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	22	Known	01-APR-2019	30-JUN-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	19	Returned to Compliance	01-APR-2019	30-JUN-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	25	Known	01-APR-2019	30-JUN-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	29	Known	01-JAN-2019	31-MAR-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	28	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	27	Known	01-JAN-2019	31-MAR-2019	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	15	Returned to Compliance	20-APR-2017	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	23	Returned to Compliance	01-JUL-2016	30-SEP-2016	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	16	Returned to Compliance	15-MAY-2016	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	41	Returned to Compliance	01-OCT-2015	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	9	Returned to Compliance	01-SEP-2015	31-AUG-2016	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	10	Returned to Compliance	01-SEP-2015	31-AUG-2016	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	14	Returned to Compliance	01-SEP-2014	31-AUG-2015	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	13	Returned to Compliance	01-SEP-2014	31-AUG-2015	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8	Returned to Compliance	01-JAN-2014	31-MAR-2014	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	11	Returned to Compliance	01-JAN-2014	31-AUG-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	12	Returned to Compliance	01-JAN-2014	31-AUG-2014	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	6	Returned to Compliance	01-APR-2013	30-JUN-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	5	Returned to Compliance	01-JAN-2013	31-MAR-2013	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	7	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1	Returned to Compliance	01-OCT-2006	31-OCT-2006	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	100	Returned to Compliance	19-OCT-1999	02-FEB-2000	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	49296	Returned to Compliance	01-JAN-1996	18-OCT-2001	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	66286	Known	01-JAN-1986	31-DEC-1988	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	66186	Known	01-JAN-1986	31-DEC-1988	Yes

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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
57	41	SIA	State Violation/Reminder Notice	29-AUG-2025	State	-
56	39	SOX	State Compliance achieved	25-JUL-2025	State	-
55	40	SOX	State Compliance achieved	25-JUL-2025	State	-
52	31	SOX	State Compliance achieved	27-MAY-2025	State	-
51	35	SOX	State Compliance achieved	13-MAY-2025	State	-
51	34	SOX	State Compliance achieved	13-MAY-2025	State	-
45	37	SOX	State Compliance achieved	13-MAR-2025	State	-
46	32	SOX	State Compliance achieved	13-MAR-2025	State	-
54	38	SOX	State Compliance achieved	01-MAR-2025	State	-
42	36	SOX	State Compliance achieved	20-DEC-2024	State	-
34	7	SOX	State Compliance achieved	25-AUG-2022	State	SYSTEM COLLECTED ASBESTOS SAMPLE ON 8/25/2022
30	23	SIF	State Public Notification received	11-FEB-2021	State	-
30	19	SIF	State Public Notification received	11-FEB-2021	State	-
30	21	SIF	State Public Notification received	11-FEB-2021	State	-
30	28	SIF	State Public Notification received	11-FEB-2021	State	-
30	30	SIF	State Public Notification received	11-FEB-2021	State	-
24	12	SOX	State Compliance achieved	25-SEP-2017	State	-
24	11	SOX	State Compliance achieved	25-SEP-2017	State	-
26	10	SOX	State Compliance achieved	25-SEP-2017	State	-
25	14	SOX	State Compliance achieved	25-SEP-2017	State	-
25	13	SOX	State Compliance achieved	25-SEP-2017	State	-
26	9	SOX	State Compliance achieved	25-SEP-2017	State	-
32	15	SOX	State Compliance achieved	08-JUN-2017	State	SYSTEM RETURNED TO COMPLIANCE ON 6/8/2017 PER KRISTA SCHULTZ.
27	16	SOX	State Compliance achieved	19-MAY-2016	State	-
17	8	SOX	State Compliance achieved	11-MAY-2016	State	-
10	6	SOX	State Compliance achieved	22-SEP-2014	State	treatment plant was inactivated on 9/4/14.
10	5	SOX	State Compliance achieved	22-SEP-2014	State	treatment plant was inactivated on 9/4/14.
3	1	SOX	State Compliance achieved	10-MAY-2011	State	System returned to compliance, SOXed to remove from SNC period
#12-19-08-8	49296	EOX	Federal Compliance achieved	19-NOV-2008	ODSWeb	51 EOX
1E00	100	EOX	Federal Compliance achieved	02-FEB-2000	ODSWeb	-
3E86	66186	SIF	State Public Notification received	30-SEP-1986	State	-
3E86	66286	SIF	State Public Notification received	30-SEP-1986	State	-

1 - 32 of 32

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL #2	2045	Yes	Well	Ground water	Emergency	Inactive
WELL #1	2044	Yes	Well	Ground water	Permanent	Inactive
WELL #3	2046	Yes	Well	Ground water	Permanent	Active
WELL #4	13718	Yes	Well	Ground water	Permanent	Active
DIST	5306	No	Distribution System/Zone	-	-	Active
SAMPLING STATION #1	7489	No	Sampling Station	-	-	Active
SAMPLING STATION #2	7488	No	Sampling Station	-	-	Inactive
STORAGE TANK #1	10105	No	Storage	-	-	Active
TREATMENT PLANT #4	13719	No	Treatment Plant	-	-	Active
TREATMENT PLANT #3	14937	No	Treatment Plant	-	-	Active
TREATMENT PLANT #2	1195	No	Treatment Plant	-	-	Inactive
TREATMENT PLANT #1	1246	No	Treatment Plant	-	-	Inactive

1 - 12 of 12

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT #2	1195	Hypochlorination, Post	Disinfection
TREATMENT PLANT #1	1246	Hypochlorination, Post	Disinfection
TREATMENT PLANT #4	13719	Hypochlorination, Post	Disinfection
TREATMENT PLANT #3	14937	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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