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Todahaidekani NTUA

Arizona — Community Water System — PWSID: NN4903071

System Information

PWSIDNN4903071
System NameTodahaidekani NTUA
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeNative American
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedAug 2, 1994
Last ReportedDec 31, 2025

Location & Contact

StateArizona
CityFt Defiance
ZIP Code86504
AddressOffice of Deputy General Manager
OrganizationNavajo Tribal Utility Authority
Phone9287296277

Population & Service

Population Served301
Service Connections88

Drinking Water Violations (140)

This water system has 140 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jan 1, 2022 Mar 31, 2022 Arsenic MR No Yes — 0.010 mg/L — Resolved Mar 31, 2022 Arsenic Rule
Apr 1, 2020 Jun 30, 2020 Arsenic MCL Yes No .0105 MG/L 0.010 mg/L — Resolved Jun 30, 2020 Arsenic Rule
Apr 1, 2020 Jun 30, 2020 Arsenic MCL Yes No .0105 MG/L 0.010 mg/L — Resolved Jun 30, 2020 Arsenic Rule
Apr 1, 2020 — Public Notice Other No No — — — Resolved Oct 25, 2022 Public Notice Rule and Revised PN Rule
Apr 1, 2020 — Public Notice Other No No — — — Resolved Oct 25, 2022 Public Notice Rule and Revised PN Rule
Apr 1, 2020 Jun 30, 2020 Arsenic MCL Yes No .0105 MG/L 0.010 mg/L — Resolved Jun 30, 2020 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Feb 12, 2019 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Feb 12, 2019 Arsenic Rule
Oct 1, 2018 — Public Notice Other No No — — — Resolved Feb 21, 2019 Public Notice Rule and Revised PN Rule
Oct 1, 2018 — Public Notice Other No No — — — Resolved Feb 21, 2019 Public Notice Rule and Revised PN Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MCL Yes No .0107 MG/L 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MCL Yes No .0107 MG/L 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Oct 1, 2018 Dec 31, 2018 Arsenic MCL Yes No .0107 MG/L 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MCL Yes No .0106 MG/L 0.010 mg/L — Resolved Sep 30, 2018 Arsenic Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MCL Yes No .0106 MG/L 0.010 mg/L — Resolved Sep 30, 2018 Arsenic Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MCL Yes No .0106 MG/L 0.010 mg/L — Resolved Sep 30, 2018 Arsenic Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .0109 MG/L 0.010 mg/L — Resolved Mar 31, 2017 Arsenic Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .0109 MG/L 0.010 mg/L — Resolved Mar 31, 2017 Arsenic Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .0109 MG/L 0.010 mg/L — Resolved Mar 31, 2017 Arsenic Rule
Jan 1, 2017 — Public Notice Other No No — — — Resolved May 19, 2017 Public Notice Rule and Revised PN Rule
Jul 1, 2016 Sep 30, 2016 Arsenic MCL Yes No .0106 MG/L 0.010 mg/L — Resolved Sep 30, 2016 Arsenic Rule
Jul 1, 2016 Sep 30, 2016 Arsenic MCL Yes No .0106 MG/L 0.010 mg/L — Resolved Sep 30, 2016 Arsenic Rule
Apr 1, 2016 Jun 30, 2016 Arsenic MCL Yes No .0111 MG/L 0.010 mg/L — Resolved Jun 30, 2016 Arsenic Rule
Apr 1, 2016 Jun 30, 2016 Arsenic MCL Yes No .0111 MG/L 0.010 mg/L — Resolved Jun 30, 2016 Arsenic Rule
Apr 1, 2016 — Revised Total Coliform Rule Other No No — — — Resolved Dec 23, 2019 Revised Total Coliform Rule
Apr 1, 2016 — Revised Total Coliform Rule Other No No — — — Resolved Dec 23, 2019 Revised Total Coliform Rule
Jan 1, 2016 Mar 31, 2016 Arsenic MCL Yes No .0111 MG/L 0.010 mg/L — Resolved Mar 31, 2016 Arsenic Rule
Jan 1, 2016 Mar 31, 2016 Arsenic MCL Yes No .0111 MG/L 0.010 mg/L — Resolved Mar 31, 2016 Arsenic Rule
Jan 1, 2016 Mar 31, 2016 Arsenic MCL Yes No .0111 MG/L 0.010 mg/L — Resolved Mar 31, 2016 Arsenic Rule
Oct 1, 2015 — Public Notice Other No No — — — Resolved Jul 1, 2016 Public Notice Rule and Revised PN Rule
Oct 1, 2015 — Public Notice Other No No — — — Resolved Jul 1, 2016 Public Notice Rule and Revised PN Rule
Oct 1, 2015 Dec 31, 2015 Arsenic MCL Yes No .012 MG/L 0.010 mg/L — Resolved Dec 31, 2015 Arsenic Rule
Oct 1, 2015 Dec 31, 2015 Arsenic MCL Yes No .012 MG/L 0.010 mg/L — Resolved Dec 31, 2015 Arsenic Rule
Oct 1, 2015 Dec 31, 2015 Arsenic MCL Yes No .012 MG/L 0.010 mg/L — Resolved Dec 31, 2015 Arsenic Rule
Oct 1, 2013 — Public Notice Other No No — — — Resolved Jul 24, 2013 Public Notice Rule and Revised PN Rule
Oct 1, 2013 Dec 31, 2013 Arsenic MCL Yes No .0105 MG/L 0.010 mg/L — Resolved Dec 31, 2013 Arsenic Rule
Oct 1, 2013 Dec 31, 2013 Arsenic MCL Yes No .0105 MG/L 0.010 mg/L — Resolved Dec 31, 2013 Arsenic Rule
Oct 1, 2013 Dec 31, 2013 Arsenic MCL Yes No .0105 MG/L 0.010 mg/L — Resolved Dec 31, 2013 Arsenic Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Resolved Feb 23, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Resolved Feb 23, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Resolved Feb 23, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Sep 30, 2013 Arsenic MCL Yes No .0172 MG/L 0.010 mg/L — Resolved Sep 30, 2013 Arsenic Rule
Jul 1, 2013 Sep 30, 2013 Arsenic MCL Yes No .0172 MG/L 0.010 mg/L — Resolved Sep 30, 2013 Arsenic Rule
Apr 1, 2013 Jun 30, 2013 Arsenic MCL Yes No .0182 MG/L 0.010 mg/L — Resolved Jun 30, 2013 Arsenic Rule
Apr 1, 2013 Jun 30, 2013 Arsenic MCL Yes No .0182 MG/L 0.010 mg/L — Resolved Jun 30, 2013 Arsenic Rule
Jan 1, 2013 Mar 31, 2013 Arsenic MCL Yes No .01838 MG/L 0.010 mg/L — Resolved Mar 31, 2013 Arsenic Rule
Jan 1, 2013 Mar 31, 2013 Arsenic MCL Yes No .01838 MG/L 0.010 mg/L — Resolved Mar 31, 2013 Arsenic Rule
Dec 1, 2012 Dec 31, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2012 Total Coliform Rule
Dec 1, 2012 Dec 31, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2012 Total Coliform Rule
Nov 1, 2012 Nov 30, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2012 Total Coliform Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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