Ft Defiance, NN

Mexican Hat NTUA Water System

Current status

1 item on record is 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): NN4903032
System type: Community Water System
Population served: 239
Service connections: 70
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (IDSE)
—
TTHM
January 1, 2020 – December 31, 2020
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016
Unaddressed
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2012 – December 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2012 – November 30, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2011 – November 30, 2011
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2011 – September 30, 2011
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2011 – May 15, 2012
Resolved
Monitoring, Regular
—
2,3,7,8-TCDD
January 1, 2011 – May 15, 2012
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2010 – July 21, 2008
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

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2020 – December 31, 2020	Monitoring, Routine (IDSE)	TTHM	—	Resolved
April 1, 2016	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Unaddressed
December 1, 2012 – December 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2012 – November 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2011 – November 30, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2011 – September 30, 2011	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2011 – May 15, 2012	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2011 – May 15, 2012	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
October 1, 2010 – July 21, 2008	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	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

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yet

Enforcement actions

August 28, 2024State Formal Notice of Violation issued1 linked violation
July 5, 2021State Compliance achieved1 linked violation
July 5, 2021State Compliance achieved1 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
March 31, 2021State Formal Notice of Violation issued1 linked violation
January 11, 2013State Compliance achieved1 linked violation
January 11, 2013State Formal Notice of Violation issued1 linked violation
December 11, 2012State Compliance achieved1 linked violation
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
May 15, 2012State Compliance achieved1 linked violation
May 15, 2012State Compliance achieved1 linked violation
December 12, 2011State Compliance achieved1 linked violation
December 12, 2011State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
November 22, 2011State Public Notification requested1 linked violation
November 22, 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
November 18, 2011State Public Notification issued1 linked violation
November 18, 2011State Formal Notice of Violation issued1 linked violation
November 11, 2011State Compliance achieved1 linked violation
July 18, 2011State Compliance achieved1 linked violation
July 18, 2011State Compliance achieved1 linked violation
January 25, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
July 21, 2008State Compliance achieved1 linked violation
July 11, 2008State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 11, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
June 6, 2007State Public Notification receivedgeneral compliance action — not tied to a specific violation on record

Contact

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504