Drinking Water Compliance OS

Ft Defiance, NN

Casamero Lake-Smith Lake 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)
NN3500256
System type
Community Water System
Population served
906
Service connections
265
Ownership
Native American tribal
Water source
groundwater (wells)

Violation history

  • Sample Siting Plan Errors (RTCR)

    Revised Total Coliform Rule

    April 1, 2016

    Unaddressed
  • Monitoring, Regular

    Endothall

    October 1, 2014 – December 31, 2014

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    October 1, 2014 – December 31, 2014

    Resolved
  • Monitoring, Regular

    Glyphosate

    October 1, 2014 – December 31, 2014

    Resolved
  • Monitoring, Regular

    Diquat

    October 1, 2014 – December 31, 2014

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2014 – July 31, 2014

    Resolved
  • Monitoring, Regular

    Glyphosate

    July 1, 2014 – September 30, 2014

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    July 1, 2014 – September 30, 2014

    Resolved
  • Monitoring, Regular

    Diquat

    July 1, 2014 – September 30, 2014

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    July 1, 2014 – July 1, 2015

    Resolved
  • Monitoring, Regular

    Endothall

    July 1, 2014 – September 30, 2014

    Resolved
  • Monitoring, Regular

    Glyphosate

    April 1, 2014 – June 30, 2014

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    April 1, 2014 – June 30, 2014

    Resolved
  • Monitoring, Regular

    Endothall

    April 1, 2014 – June 30, 2014

    Resolved
  • Monitoring, Regular

    Diquat

    April 1, 2014 – June 30, 2014

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    March 1, 2014 – March 31, 2014

    Resolved
  • Monitoring, Regular

    Diquat

    January 1, 2014 – March 31, 2014

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    January 1, 2014 – March 31, 2014

    Resolved
  • Monitoring, Regular

    Glyphosate

    January 1, 2014 – March 31, 2014

    Resolved
  • Monitoring, Regular

    Endothall

    January 1, 2014 – March 31, 2014

    Resolved
  • Failure Submit IDSE/Subpart V Plan Rpt

    Stage 2 Disinfectants and Disinfection Byproducts Rule

    October 1, 2013

    Unaddressed
  • Monitoring, Regular

    Endothall

    July 1, 2013 – September 30, 2013

    Resolved
  • Monitoring, Regular

    Glyphosate

    July 1, 2013 – September 30, 2013

    Resolved
  • Monitoring, Regular

    Diquat

    July 1, 2013 – September 30, 2013

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    July 1, 2013 – September 30, 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

    1,2,4-Trichlorobenzene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    1,2-DIBROMO-3-CHLOROPROPANE

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Chlordane

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Benzene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Toluene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Styrene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Combined Uranium

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Endrin

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Methoxychlor

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Toxaphene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Dalapon

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Diquat

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Endothall

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Glyphosate

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    OXAMYL

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Simazine

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Picloram

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Dinoseb

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Carbofuran

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Atrazine

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    LASSO

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Heptachlor

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    2,4-D

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    October 1, 2012 – December 4, 2012

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    July 1, 2012 – July 31, 2012

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2010 – March 23, 2010

    Resolved
  • Monitoring, Regular

    Nitrite

    January 1, 2010 – December 31, 2010

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2008 – August 18, 2008

    Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

Contact

Navajo Tribal Utility Authority

9287296277

Ft Defiance, AZ 86504