Ft Defiance, NN

Houck-Querino Canyon 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): NN0400280
System type: Community Water System
Population served: 1,023
Service connections: 299
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
Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
July 1, 2016 – July 28, 2016
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2015 – August 31, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
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 – December 10, 2018
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
—
2,3,7,8-TCDD
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Endothall
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
Diquat
January 1, 2008 – December 31, 2010
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2008 – December 31, 2010
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
July 1, 2016 – July 28, 2016	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
August 1, 2015 – August 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2015 – July 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2013 – December 10, 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
November 1, 2012 – November 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	2,3,7,8-TCDD	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Endothall	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Diquat	—	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

April 15, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
April 15, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
July 7, 2021State Compliance achieved1 linked violation
July 7, 2021State Compliance achieved1 linked violation
March 31, 2021State Public Notification issued1 linked violation
March 31, 2021State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 31, 2021State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
March 31, 2021State Formal Notice of Violation issued1 linked violation
March 31, 2021State Formal Notice of Violation issued1 linked violation
March 31, 2021State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 31, 2021State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 31, 2021State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
March 31, 2021State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
March 31, 2021State Public Notification issued1 linked violation
December 10, 2018State Compliance achieved1 linked violation
August 25, 2017State Formal Notice of Violation issued1 linked violation
August 25, 2017State Public Notification issued1 linked violation
December 8, 2016State Formal Notice of Violation issued1 linked violation
July 28, 2016State Compliance achieved1 linked violation
December 2, 2015State Formal Notice of Violation issued1 linked violation
December 2, 2015State Public Notification issued1 linked violation
December 2, 2015State Public Notification issued1 linked violation
December 2, 2015State Formal Notice of Violation issued1 linked violation
September 2, 2015State Compliance achieved1 linked violation
September 2, 2015State Compliance achieved1 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
October 21, 2011State Violation/Reminder Notice1 linked violation
October 21, 2011State Violation/Reminder Notice1 linked violation
October 21, 2011State Violation/Reminder Notice1 linked violation
October 21, 2011State Violation/Reminder Notice1 linked violation
October 21, 2011State Violation/Reminder Notice1 linked violation
October 21, 2011State Violation/Reminder Notice1 linked violation
June 11, 2011State Compliance achieved1 linked violation
June 11, 2011State Compliance achieved1 linked violation
June 11, 2011State Compliance achieved1 linked violation
June 11, 2011State Compliance achieved1 linked violation
June 11, 2011State Compliance achieved1 linked violation
June 11, 2011State Compliance achieved1 linked violation
June 12, 2009State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record

Contact

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504