Ft Defiance, NN

Chilchinbeto NTUA Water System

Current status

2 items on record are 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): NN0400290
System type: Community Water System
Population served: 1,276
Service connections: 373
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

Monitoring, Regular
—
Nitrate
January 1, 2024 – September 24, 2024
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2024 – September 24, 2024
Resolved
Monitoring, Routine (IDSE)
—
Total Haloacetic Acids (HAA5)
January 1, 2017 – December 31, 2017
Resolved
Monitoring, Routine (IDSE)
—
TTHM
January 1, 2017 – December 31, 2017
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2016 – July 31, 2016
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016
Unaddressed
Failure Submit IDSE/Subpart V Plan Rpt
—
Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013
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
Monitoring, Regular
—
Nitrite
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Benzene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Toluene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Styrene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2005 – May 17, 2004
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 2003 – June 30, 2003
Archived

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2024 – September 24, 2024	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2024 – September 24, 2024	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2017 – December 31, 2017	Monitoring, Routine (IDSE)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2017 – December 31, 2017	Monitoring, Routine (IDSE)	TTHM	—	Resolved
July 1, 2016 – July 31, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2016	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Unaddressed
October 1, 2013	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts 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
January 1, 2010 – December 31, 2010	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Benzene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Toluene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Styrene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2005 – May 17, 2004	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
June 1, 2003 – June 30, 2003	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

September 24, 2024State Compliance achieved1 linked violation
September 24, 2024State Compliance achieved1 linked violation
August 28, 2024State Formal Notice of Violation issued1 linked violation
April 1, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 25, 2021State Compliance achievedgeneral 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
August 27, 2018State Compliance achieved1 linked violation
August 27, 2018State Compliance achieved1 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 Public Notification issued1 linked violation
March 5, 2018State Public Notification issued1 linked violation
August 25, 2017State Public Notification issued1 linked violation
August 25, 2017State Formal Notice of Violation issued1 linked violation
December 8, 2016State Formal Notice of Violation issued1 linked violation
August 11, 2016State 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 Compliance achieved1 linked violation
February 25, 2008State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 6, 2006State Compliance achieved1 linked violation
May 17, 2004State Compliance achieved21 linked violations

Contact

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504