Thoreau, NN

Thoreau High School Water System

Current status

5 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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 Navajo Nation’s official records. Always confirm current status with Navajo Nation before making decisions based on this information.

System facts

System ID (PWSID): NN3510007
System type: Community Water System
Population served: 746
Service connections: 82
Ownership: local government
Water source: groundwater (wells)

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
August 1, 2024
Unaddressed
Treatment Technique, Level 2 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
August 1, 2024 – September 6, 2024
Resolved
Treatment Technique, Level 2 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
July 1, 2024 – September 6, 2024
Resolved
Maximum Contaminant Level Violation, E. coli (RTCR)
Health-based
Revised Total Coliform Rule
July 1, 2024 – July 31, 2024
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 1, 2024
Unaddressed
Public Notification Violation for NPDWR Violation
—
Public Notice
July 1, 2024
Unaddressed
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2024 – June 17, 2024
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2024 – August 6, 2024
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2024 – December 31, 2024
Archived
Treatment Technique, Level 2 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
October 1, 2022 – April 25, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
August 1, 2022
Unaddressed
Public Notification Violation for NPDWR Violation
—
Public Notice
August 1, 2022
Unaddressed
Treatment Technique, Level 2 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
August 1, 2022 – April 25, 2023
Resolved
Maximum Contaminant Level Violation, E. coli (RTCR)
Health-based
Revised Total Coliform Rule
August 1, 2022 – August 31, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2022 – December 21, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
June 1, 2022 – July 27, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2022 – July 27, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2021 – December 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2021 – December 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2021 – September 30, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2021 – August 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2021 – July 31, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – December 21, 2022
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2021 – June 15, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2021 – April 30, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2021 – March 31, 2021
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2021 – February 28, 2021
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2021 – December 31, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2021 – April 18, 2022
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2021 – December 31, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2018 – July 10, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2017 – January 31, 2017
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2016 – February 29, 2016
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2016 – December 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2016 – December 31, 2016
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
October 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
July 1, 2014 – September 30, 2014
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
April 1, 2014 – June 30, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2014 – April 30, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2014 – January 31, 2014
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
January 1, 2014 – March 31, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2013 – November 30, 2013
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – January 1, 2015
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
August 1, 2024 – September 6, 2024	Treatment Technique, Level 2 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
July 1, 2024 – September 6, 2024	Treatment Technique, Level 2 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
July 1, 2024 – July 31, 2024	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
July 1, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
July 1, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
May 1, 2024 – June 17, 2024	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – August 6, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2024 – December 31, 2024	Monitoring, Regular	Nitrite	—	Archived
October 1, 2022 – April 25, 2023	Treatment Technique, Level 2 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
August 1, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
August 1, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
August 1, 2022 – April 25, 2023	Treatment Technique, Level 2 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
August 1, 2022 – August 31, 2022	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
July 1, 2022 – December 21, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
June 1, 2022 – July 27, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
May 1, 2022 – July 27, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2021 – December 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2021 – December 31, 2021	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
September 1, 2021 – September 30, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2021 – August 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – July 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2021 – December 21, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2021 – June 15, 2021	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2021 – April 30, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2021 – March 31, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2021 – February 28, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2021 – April 18, 2022	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2018 – July 10, 2019	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2016 – February 29, 2016	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2014 – December 31, 2014	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
July 1, 2014 – September 30, 2014	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
April 1, 2014 – April 30, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2014 – January 31, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2014 – March 31, 2014	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
November 1, 2013 – November 30, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2013 – January 1, 2015	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	—	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

April 21, 2025State Formal Notice of Violation issued1 linked violation
April 21, 2025State Formal Notice of Violation issued1 linked violation
April 21, 2025State Formal Notice of Violation issued1 linked violation
April 21, 2025State Formal Notice of Violation issued1 linked violation
April 21, 2025State Formal Notice of Violation issued1 linked violation
September 11, 2024State Compliance achieved1 linked violation
September 6, 2024State Compliance achieved1 linked violation
September 6, 2024State Compliance achieved1 linked violation
August 6, 2024State Compliance achieved1 linked violation
June 17, 2024State Compliance achieved1 linked violation
May 8, 2023State Formal Notice of Violation issued1 linked violation
April 25, 2023State Compliance achieved1 linked violation
April 25, 2023State Compliance achieved1 linked violation
January 31, 2023State Formal Notice of Violation issued1 linked violation
January 31, 2023State Formal Notice of Violation issued1 linked violation
January 31, 2023State Formal Notice of Violation issued1 linked violation
January 31, 2023State Formal Notice of Violation issued1 linked violation
December 21, 2022State Compliance achieved1 linked violation
December 21, 2022State Compliance achieved1 linked violation
September 12, 2022State Compliance achieved1 linked violation
July 27, 2022State Compliance achieved1 linked violation
July 27, 2022State Compliance achieved1 linked violation
May 25, 2022State Compliance achieved1 linked violation
May 25, 2022State Compliance achieved1 linked violation
April 18, 2022State Compliance achieved1 linked violation
April 18, 2022State Compliance achieved1 linked violation
March 29, 2022State Formal Notice of Violation issued1 linked violation
March 29, 2022State Public Notification issued1 linked violation
March 29, 2022State Public Notification issued1 linked violation
March 29, 2022State Public Notification issued1 linked violation
March 29, 2022State Public Notification issued1 linked violation
March 29, 2022State Formal Notice of Violation issued1 linked violation
March 29, 2022State Formal Notice of Violation issued1 linked violation
March 29, 2022State Formal Notice of Violation issued1 linked violation
January 11, 2022State Compliance achieved1 linked violation
October 12, 2021State Compliance achieved1 linked violation
October 12, 2021State Compliance achieved1 linked violation
October 12, 2021State Compliance achieved1 linked violation
July 7, 2021State Public Notification issued1 linked violation
July 7, 2021State Public Notification issued1 linked violation
July 7, 2021State Formal Notice of Violation issued1 linked violation
July 7, 2021State Formal Notice of Violation issued1 linked violation
June 15, 2021State Compliance achieved1 linked violation
May 19, 2021State Compliance achieved1 linked violation
May 19, 2021State Compliance achieved1 linked violation
May 19, 2021State Compliance achieved1 linked violation
July 10, 2019State Compliance achieved1 linked violation
March 5, 2019State Public Notification issued1 linked violation
March 5, 2019State Formal Notice of Violation issued1 linked violation
August 21, 2017State Compliance achieved1 linked violation
August 21, 2017State Compliance achieved1 linked violation
March 1, 2017State Compliance achieved1 linked violation
May 20, 2016State Compliance achieved1 linked violation
May 11, 2015State Compliance achieved1 linked violation
April 14, 2015State Compliance achieved1 linked violation
April 14, 2015State Compliance achieved1 linked violation
April 14, 2015State Compliance achieved1 linked violation
January 1, 2015State Compliance achieved1 linked violation
August 14, 2014State Compliance achieved1 linked violation
August 14, 2014State Compliance achieved1 linked violation
February 13, 2014State Compliance achieved1 linked violation

Contact

Thoreau High School

5057214500

Thoreau, NM 87323