Drinking Water Compliance OS

Ft Defiance, NN

Chinle-Many Farms-Del Muerto 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)
NN0400174
System type
Community Water System
Population served
8,458
Service connections
2,473
Ownership
Native American tribal
Water source
groundwater (wells)

Violation history

  • Monitoring, Routine (IDSE)

    TTHM

    January 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    January 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Regular

    Beryllium, Total

    January 1, 2020 – March 31, 2020

    Resolved
  • Monitoring, Regular

    Cadmium

    January 1, 2020 – March 31, 2020

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    April 1, 2017 – April 30, 2017

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    March 1, 2017 – March 31, 2017

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2017 – February 28, 2017

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    January 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    January 1, 2017 – January 31, 2017

    Resolved
  • Monitoring, Routine (IDSE)

    TTHM

    January 1, 2017 – December 31, 2017

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2014 – August 31, 2014

    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
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    September 1, 2011 – September 30, 2011

    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

    Barium

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Selenium

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Chromium

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Beryllium, Total

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    CYANIDE

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Thallium, Total

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Cadmium

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Fluoride

    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

    Mercury

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Arsenic

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Antimony, Total

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2011 – December 31, 2013

    Resolved
  • Monitoring, Regular

    Nitrite

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    OXAMYL

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Arsenic

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Barium

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Cadmium

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Chromium

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    CYANIDE

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Fluoride

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Mercury

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Selenium

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Antimony, Total

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Beryllium, Total

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Thallium, Total

    January 1, 2008 – January 1, 2008

    Resolved
  • Monitoring, Regular

    Endrin

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    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

    Di(2-ethylhexyl) adipate

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Simazine

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Picloram

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Dinoseb

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Carbofuran

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Atrazine

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    LASSO

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    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-D

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2008 – December 31, 2010

    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

    Xylenes, Total

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Chlordane

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Combined Uranium

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2008 – December 31, 2010

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2007 – July 31, 2007

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    June 1, 2007 – June 30, 2007

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2006 – August 31, 2006

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    June 1, 2005 – June 30, 2005

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Combined Uranium

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2005 – December 31, 2010

    Resolved
  • Monitoring, Repeat Minor (TCR)

    Coliform (TCR)

    August 1, 2004 – July 30, 2004

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2004 – August 31, 2004

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2003 – August 29, 2003

    Resolved
  • Monitoring, Repeat Minor (TCR)

    Coliform (TCR)

    August 1, 2003 – August 29, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    January 1, 2003 – January 31, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2002 – August 31, 2002

    Archived
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2002 – August 31, 2002

    Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Contact

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504