Tonalea, NN

Navajo Mountain Community Boarding School BIA Water System

Current status

No open violations on record as of July 4, 2026.

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): NN4933011
System type: Community Water System
Population served: 163
Service connections: 17
Ownership: federal government
Water source: groundwater (wells)

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – July 29, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
March 1, 2024 – March 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2024 – February 29, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2024 – January 31, 2024
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
October 1, 2023 – November 30, 2023
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
October 1, 2022 – November 17, 2022
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
December 1, 2020 – January 26, 2021
Resolved
Report Sample Result/Fail Monitor (RTCR)
—
Revised Total Coliform Rule
May 1, 2020 – June 19, 2020
Resolved
Monitoring, Routine (IDSE)
—
TTHM
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2018 – March 31, 2018
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 1, 2018 – June 30, 2018
Resolved
Monitoring, Routine (IDSE)
—
TTHM
January 1, 2018 – March 31, 2018
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
January 1, 2018 – March 31, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2017 – December 31, 2017
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
October 1, 2017 – December 31, 2017
Resolved
Monitoring, Routine (IDSE)
—
TTHM
October 1, 2017 – December 31, 2017
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 1, 2017 – June 30, 2018
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2017 – June 21, 2017
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2016 – December 20, 2016
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016 – October 4, 2018
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2015 – July 31, 2015
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – October 4, 2018
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2012 – December 31, 2012
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2010 – December 31, 2010
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2010 – December 31, 2010
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2006 – December 31, 2006
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2004 – April 4, 2007
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2024 – July 29, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 1, 2024 – March 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
February 1, 2024 – February 29, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2023 – November 30, 2023	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2022 – November 17, 2022	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
December 1, 2020 – January 26, 2021	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
May 1, 2020 – June 19, 2020	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	TTHM	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2018 – March 31, 2018	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2018 – June 30, 2018	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2018 – March 31, 2018	Monitoring, Routine (IDSE)	TTHM	—	Resolved
January 1, 2018 – March 31, 2018	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2017 – December 31, 2017	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2017 – December 31, 2017	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2017 – December 31, 2017	Monitoring, Routine (IDSE)	TTHM	—	Resolved
October 1, 2017 – June 30, 2018	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2017 – June 21, 2017	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2016 – December 20, 2016	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
April 1, 2016 – October 4, 2018	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2015 – July 31, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2013 – October 4, 2018	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	—	Resolved
December 1, 2012 – December 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2004 – April 4, 2007	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

July 29, 2025State Compliance achieved1 linked violation
March 7, 2025State Formal Notice of Violation issued1 linked violation
April 2, 2024State Compliance achieved1 linked violation
April 2, 2024State Compliance achieved1 linked violation
April 2, 2024State Compliance achieved1 linked violation
November 30, 2023State Compliance achieved1 linked violation
November 17, 2022State Compliance achieved1 linked violation
July 7, 2021State Compliance achieved1 linked violation
July 7, 2021State Compliance achieved1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
March 31, 2021State Public Notification issued1 linked violation
March 31, 2021State Public Notification issued1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
January 26, 2021State Compliance achieved1 linked violation
June 19, 2020State Compliance achieved1 linked violation
October 4, 2018State Compliance achieved1 linked violation
October 4, 2018State Compliance achieved1 linked violation
August 9, 2018State Compliance achieved1 linked violation
August 9, 2018State Compliance achieved1 linked violation
August 9, 2018State Compliance achieved1 linked violation
August 9, 2018State Compliance achieved1 linked violation
August 9, 2018State Compliance achieved1 linked violation
August 9, 2018State Compliance achieved1 linked violation
June 30, 2018State Compliance achieved1 linked violation
June 30, 2018State Compliance achieved1 linked violation
May 31, 2018State Formal Notice of Violation issued1 linked violation
May 31, 2018State Formal Notice of Violation issued1 linked violation
May 31, 2018State Formal Notice of Violation issued1 linked violation
May 31, 2018State Public Notification issued1 linked violation
May 31, 2018State Public Notification issued1 linked violation
May 31, 2018State Public Notification issued1 linked violation
May 31, 2018State Formal Notice of Violation issued1 linked violation
March 5, 2018State Public Notification issued1 linked violation
March 5, 2018State Public Notification issued1 linked violation
March 5, 2018State Public Notification issued1 linked violation
March 5, 2018State Formal Notice of Violation issued1 linked violation
March 5, 2018State Formal Notice of Violation issued1 linked violation
March 5, 2018State Formal Notice of Violation issued1 linked violation
August 28, 2017State Public Notification issued1 linked violation
August 28, 2017State Public Notification issued1 linked violation
August 28, 2017State Public Notification issued1 linked violation
August 28, 2017State Formal Notice of Violation issued1 linked violation
August 28, 2017State Formal Notice of Violation issued1 linked violation
August 28, 2017State Formal Notice of Violation issued1 linked violation
June 21, 2017State Compliance achieved1 linked violation
February 28, 2017State Public Notification issued1 linked violation
February 28, 2017State Formal Notice of Violation issued1 linked violation
December 20, 2016State Compliance achieved1 linked violation
December 2, 2015State Formal Notice of Violation issued1 linked violation
August 7, 2015State Compliance achieved1 linked violation
January 14, 2013State Formal Notice of Violation issued1 linked violation
January 14, 2013State Compliance achieved1 linked violation
November 20, 2012State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
September 11, 2012State Compliance achievedgeneral compliance action — not tied to a specific violation on record
February 8, 2012State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
February 6, 2012State Compliance achieved1 linked violation
February 6, 2012State Compliance achieved1 linked violation
February 6, 2012State Compliance achieved1 linked violation
December 2, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 2, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 29, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
November 29, 2011State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
November 18, 2011State Public Notification issued1 linked violation
November 18, 2011State Formal Notice of Violation issued1 linked violation
November 18, 2011State Formal Notice of Violation issued1 linked violation
November 18, 2011State Public Notification issued1 linked violation
September 28, 2011State Compliance achieved1 linked violation
January 26, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
January 25, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 15, 2010State Public Notification requested1 linked violation
September 15, 2010State Public Notification requested1 linked violation
September 15, 2010State Formal Notice of Violation issued1 linked violation
September 15, 2010State Formal Notice of Violation issued1 linked violation
July 26, 2010State Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 12, 2008State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
November 7, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
September 20, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2007State Compliance achieved1 linked violation
April 4, 2007State Violation/Reminder Notice2 linked violations
November 9, 2006State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
February 15, 2006State Formal Notice of Violation issued1 linked violation

Contact

BIA NaaTsis'Aan Community School

9286722335

Tonalea, AZ 86044