Fort Defiance, NN

Tuba City 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): NN0400206
System type: Community Water System
Population served: 6,276
Service connections: 1,835
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

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
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2015 – March 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2015 – March 31, 2015
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 2014 – April 30, 2014
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2013 – May 20, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2012 – December 31, 2012
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 2011 – December 31, 2011
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 2011 – July 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2011 – December 31, 2011
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
LASSO
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Endrin
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Diquat
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Endothall
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2008 – December 31, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2002 – July 1, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2002 – May 31, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 2001 – February 28, 2001
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2000 – November 30, 2000
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 1993 – November 30, 1993
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
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, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
April 1, 2014 – April 30, 2014	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2013 – May 20, 2016	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2012 – December 31, 2012	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
December 1, 2011 – December 31, 2011	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2011 – July 31, 2011	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	LASSO	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Endrin	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Diquat	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Endothall	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Dinoseb	—	Resolved
July 1, 2002 – July 1, 2004	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
May 1, 2002 – May 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2001 – February 28, 2001	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 2000 – November 30, 2000	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 1993 – November 30, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

May 2, 2022State Compliance achievedgeneral compliance action — not tied to a specific violation on record
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 14, 2021State Compliance achieved1 linked violation
July 14, 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
May 20, 2016State Compliance achieved1 linked violation
May 20, 2016State Compliance achieved1 linked violation
May 20, 2016State Compliance achieved1 linked violation
May 20, 2016State Compliance achieved1 linked violation
August 14, 2014State Compliance achieved1 linked violation
May 8, 2013State Compliance achieved1 linked violation
May 8, 2013State Compliance achieved1 linked violation
May 8, 2013State Compliance achieved1 linked violation
May 8, 2013State Compliance achieved1 linked violation
May 15, 2012State Compliance achieved1 linked violation
May 15, 2012State Compliance achieved1 linked violation
May 15, 2012State Compliance achieved1 linked violation
March 21, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
January 9, 2012State Compliance achieved1 linked violation
June 20, 2011State Compliance achieved1 linked violation
June 7, 2011State Compliance achieved1 linked violation
June 7, 2011State Compliance achieved1 linked violation
June 7, 2011State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 9, 2011State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
April 13, 2007State Compliance achieved9 linked violations
July 1, 2004State Compliance achieved1 linked violation

Contact

Navajo Tribal Utility Authority

9287296239

Fort Defiance, AZ 86504-0170