Ft Defiance, NN

Mexican Water NTUA Water System

Current status

3 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): NN4903072
System type: Community Water System
Population served: 294
Service connections: 86
Ownership: Native American tribal
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2024 – June 30, 2024
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 1, 2024
Unaddressed
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2024 – March 31, 2024
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 1, 2024
Unaddressed
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2023 – December 31, 2023
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 1, 2023 – December 12, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2023 – September 30, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2022 – September 30, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 1, 2022
Unaddressed
Public Notification Violation for NPDWR Violation
—
Public Notice
April 1, 2022 – December 12, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2022 – June 30, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2022 – March 31, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 1, 2022 – July 1, 2023
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2022 – March 31, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2021 – December 31, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 1, 2021 – October 25, 2022
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2021 – June 30, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 1, 2019 – October 25, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2019 – September 30, 2019
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2019 – February 12, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2016 – January 1, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2016 – January 1, 2016
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016 – March 7, 2025
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2016 – January 1, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
October 1, 2015 – December 31, 2015
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 1, 2015 – July 1, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2014 – October 1, 2013
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 1, 2014 – October 1, 2014
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2014 – October 1, 2013
Resolved
Failure Submit IDSE/Subpart V Plan Rpt
—
Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – August 8, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 2013 – September 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2013 – June 30, 2013
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2013 – February 20, 2013
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
—
Carbon tetrachloride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Benzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Toluene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Styrene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2010 – December 31, 2010
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 2008 – April 13, 2010
Resolved

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

Period	Violation	Contaminant / rule	Health-based	Status
April 1, 2024 – June 30, 2024	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
January 1, 2024 – March 31, 2024	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
October 1, 2023 – December 31, 2023	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2023 – December 12, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2023 – September 30, 2023	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 2022 – September 30, 2022	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
July 1, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Unaddressed
April 1, 2022 – December 12, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2022 – June 30, 2022	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2022 – July 1, 2023	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring, Regular	Arsenic	—	Resolved
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2021 – October 25, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
June 1, 2021 – June 30, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2019 – October 25, 2022	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2019 – February 12, 2019	Monitoring, Regular	Arsenic	—	Resolved
July 1, 2016 – January 1, 2016	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2016 – January 1, 2016	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2016 – March 7, 2025	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2016 – January 1, 2016	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2015 – July 1, 2016	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2014 – October 1, 2013	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2014 – October 1, 2014	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2014 – October 1, 2013	Monitoring, Regular	Arsenic	—	Resolved
October 1, 2013 – August 8, 2022	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	—	Resolved
July 1, 2013 – September 30, 2013	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
April 1, 2013 – June 30, 2013	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2013 – February 20, 2013	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	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, 2011 – December 31, 2013	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Benzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Toluene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Styrene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2010 – December 31, 2010	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2008 – April 13, 2010	Monitoring, Regular	CYANIDE	—	Resolved

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

Enforcement actions

March 7, 2025State Compliance achieved1 linked violation
March 7, 2025State Formal Notice of Violation issued1 linked violation
November 13, 2024State Compliance achieved1 linked violation
November 13, 2024State Compliance achieved1 linked violation
November 13, 2024State Compliance achieved1 linked violation
November 13, 2024State Compliance achieved1 linked violation
August 28, 2024State Formal Notice of Violation issued1 linked violation
August 28, 2024State Formal Notice of Violation issued1 linked violation
August 20, 2024State Formal Notice of Violation issued1 linked violation
August 20, 2024State Formal Notice of Violation issued1 linked violation
August 20, 2024State Formal Notice of Violation issued1 linked violation
March 29, 2024State Formal Notice of Violation issued1 linked violation
March 29, 2024State Formal Notice of Violation issued1 linked violation
December 29, 2023State Formal Notice of Violation issued1 linked violation
December 29, 2023State Formal Notice of Violation issued1 linked violation
December 12, 2023State Compliance achieved1 linked violation
December 12, 2023State Compliance achieved1 linked violation
July 1, 2023State Compliance achieved1 linked violation
February 8, 2023State Compliance achieved1 linked violation
February 8, 2023State Compliance achieved1 linked violation
February 8, 2023State Compliance achieved1 linked violation
February 8, 2023State Compliance achieved1 linked violation
January 31, 2023State Formal Notice of Violation issued1 linked violation
January 31, 2023State Formal Notice of Violation issued1 linked violation
October 25, 2022State Compliance achieved1 linked violation
October 25, 2022State Compliance achieved1 linked violation
October 5, 2022State Formal Notice of Violation issued1 linked violation
September 30, 2022State Formal Notice of Violation issued1 linked violation
September 30, 2022State Formal Notice of Violation issued1 linked violation
August 8, 2022State Compliance achieved1 linked violation
May 19, 2022State Compliance achieved1 linked violation
March 30, 2022State Formal Notice of Violation issued1 linked violation
March 30, 2022State Formal Notice of Violation issued1 linked violation
July 13, 2021State Compliance achieved1 linked violation
December 3, 2019State Formal Notice of Violation issued1 linked violation
November 5, 2019State Compliance achieved1 linked violation
July 10, 2019State Public Notification issued1 linked violation
July 10, 2019State Formal Notice of Violation issued1 linked violation
February 12, 2019State Compliance achieved1 linked violation
August 28, 2017State Formal Notice of Violation issued1 linked violation
August 28, 2017State Public Notification issued1 linked violation
December 8, 2016State Formal Notice of Violation issued1 linked violation
November 18, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 18, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 31, 2016State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
August 31, 2016State Formal Notice of Violation issued1 linked violation
August 31, 2016State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
July 1, 2016State Compliance achieved1 linked violation
May 31, 2016State Formal Notice of Violation issued1 linked violation
May 31, 2016State Public Notification issued1 linked violation
May 31, 2016State Formal Notice of Violation issued1 linked violation
May 3, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
March 8, 2016State Formal Notice of Violation issued1 linked violation
March 8, 2016State Public Notification issued1 linked violation
January 1, 2016State Compliance achieved1 linked violation
January 1, 2016State Compliance achieved1 linked violation
January 1, 2016State Compliance achieved1 linked violation
January 1, 2016State Compliance achieved1 linked violation
October 1, 2014State Compliance achieved1 linked violation
April 30, 2014State Site Visit for enforcement purposes1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
March 28, 2014State no longer subject to Rule1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
October 1, 2013State Compliance achieved1 linked violation
February 20, 2013State Compliance achieved1 linked violation
January 11, 2013State Formal Notice of Violation 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
June 6, 2012State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
June 6, 2012State Variance/Exemption issuedgeneral compliance action — not tied to a specific violation on record
June 6, 2012State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
June 6, 2012State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Public Notification issued1 linked violation
October 21, 2011State Compliance achieved1 linked violation
October 21, 2011State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
October 21, 2011State Formal Notice of Violation issued1 linked violation
May 5, 2011State Variance/Exemption issuedgeneral compliance action — not tied to a specific violation on record
April 13, 2010State Compliance achieved1 linked violation
March 25, 2008Federal Variance/Exemption issuedgeneral compliance action — not tied to a specific violation on record
January 1, 2008State Variance/Exemption issuedgeneral compliance action — not tied to a specific violation on record
January 1, 2008State Variance/Exemption issuedgeneral compliance action — not tied to a specific violation on record

Contact

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504