Ft Defiance, NN

Coppermine NTUA 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): NN0400814
System type: Community Water System
Population served: 342
Service connections: 100
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

Monitoring, Regular
—
Arsenic
January 1, 2022 – March 31, 2022
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2019 – February 5, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2017 – March 31, 2017
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 1, 2017 – June 29, 2017
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – February 23, 2023
Resolved
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
Monitoring, Regular
—
Nitrite
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2008 – March 18, 2009
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2005 – December 31, 2010
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2005 – December 31, 2010
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2022 – March 31, 2022	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2019 – February 5, 2019	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2017 – March 31, 2017	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2017 – June 29, 2017	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2013 – February 23, 2023	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
November 1, 2012 – November 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2008 – March 18, 2009	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2005 – December 31, 2010	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

April 25, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
April 25, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
February 23, 2023State Compliance achieved1 linked violation
May 9, 2022State Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 9, 2022State Compliance achieved1 linked violation
March 29, 2022State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
March 29, 2022State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
July 10, 2019State Formal Notice of Violation issued1 linked violation
July 10, 2019State Public Notification issued1 linked violation
February 5, 2019State Compliance achieved1 linked violation
November 26, 2017State Compliance achieved1 linked violation
August 25, 2017State Public Notification issued1 linked violation
August 25, 2017State Public Notification issued1 linked violation
August 25, 2017State Formal Notice of Violation issued1 linked violation
June 29, 2017State Compliance achieved1 linked violation
June 23, 2017State Formal Notice of Violation issued1 linked violation
June 23, 2017State Public Notification issued1 linked violation
January 11, 2013State Compliance achieved1 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
March 12, 2012State Compliance achieved1 linked violation
March 12, 2012State Compliance achieved1 linked violation
November 2, 2011State Public Notification issued1 linked violation
November 2, 2011State Formal Notice of Violation issued1 linked violation
November 2, 2011State Formal Notice of Violation issued1 linked violation
November 2, 2011State Formal Notice of Violation issued1 linked violation
November 2, 2011State Public Notification issued1 linked violation
November 2, 2011State Compliance achieved1 linked violation
November 2, 2011State Public Notification issued1 linked violation
November 2, 2011State Compliance achieved1 linked violation
November 2, 2011State Compliance achieved1 linked violation
October 21, 2011State Compliance achieved1 linked violation
March 18, 2009State Compliance achieved1 linked violation

Contact

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504