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Product Safety9,700+ CPSC product recalls Food Safety28,600+ FDA food recalls Pet Safety1.3M FDA animal adverse events Drug Safety17,500+ FDA drug recalls Device Safety38,400+ FDA device recalls Workplace Safety102,900+ OSHA injury reports Brand HistoryRecall lookup by company

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Fort Defiance-Window Rock-St Michaels NTUA

Arizona - Community Water System - PWSID: NN0403000

System Information

PWSIDNN0403000
System NameFort Defiance-Window Rock-St Michaels NTUA
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region09
Serves SchoolNo
WholesalerYes
First ReportedFeb 2, 1984
Last ReportedDec 31, 2025

Location & Contact

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

Population & Service

Population Served12,869
Service Connections3,763

Drinking Water Violations (248)

This water system has 248 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
Feb 1, 2025 - TT Yes No - - - Unaddressed - -
Feb 1, 2025 - TT Yes No - - - Unaddressed - -
Feb 1, 2025 - Other No No - - - Unaddressed - -
Jul 1, 2018 Sep 30, 2018 MR No Yes - 0.060 mg/L - Resolved Sep 30, 2018 -
Jul 1, 2018 Sep 30, 2018 MR No Yes - 0.080 mg/L - Resolved Sep 30, 2018 -
Apr 1, 2018 Jun 30, 2018 MR No Yes - 0.080 mg/L - Resolved Jun 30, 2018 -
Apr 1, 2018 Jun 30, 2018 MR No Yes - 0.080 mg/L - Resolved Jun 30, 2018 -
Apr 1, 2018 Jun 30, 2018 MR No Yes - 0.060 mg/L - Resolved Jun 30, 2018 -
Apr 1, 2018 Jun 30, 2018 MR No Yes - 0.080 mg/L - Resolved Jun 30, 2018 -
Apr 1, 2018 Jun 30, 2018 MR No Yes - 0.060 mg/L - Resolved Jun 30, 2018 -
Apr 1, 2018 Jun 30, 2018 MR No Yes - 0.060 mg/L - Resolved Jun 30, 2018 -
Jan 1, 2018 Dec 31, 2018 MR No Yes - 1 mg/L - Resolved Dec 31, 2018 -
Jan 1, 2018 Dec 31, 2018 MR No Yes - 10 mg/L - Resolved Dec 31, 2018 -
Jan 1, 2017 Mar 31, 2017 MCL Yes No .0843 MG/L 0.080 mg/L - Resolved Mar 31, 2017 -
Jan 1, 2017 - Other No No - - - Resolved May 19, 2017 -
Jan 1, 2017 Mar 31, 2017 MCL Yes No .0843 MG/L 0.080 mg/L - Resolved Mar 31, 2017 -
Jan 1, 2017 Mar 31, 2017 MCL Yes No .0843 MG/L 0.080 mg/L - Resolved Mar 31, 2017 -
Oct 1, 2016 Dec 31, 2016 MCL Yes No .0829 MG/L 0.080 mg/L - Resolved Dec 31, 2016 -
Oct 1, 2016 Dec 31, 2016 MCL Yes No .0829 MG/L 0.080 mg/L - Resolved Dec 31, 2016 -
Oct 1, 2016 Dec 31, 2016 MCL Yes No .0829 MG/L 0.080 mg/L - Resolved Dec 31, 2016 -
Jul 1, 2016 Sep 30, 2016 MCL Yes No .0932 MG/L 0.080 mg/L - Resolved Sep 30, 2016 -
Jul 1, 2016 Sep 30, 2016 MCL Yes No .0932 MG/L 0.080 mg/L - Resolved Sep 30, 2016 -
Apr 1, 2016 Jun 30, 2016 MCL Yes No .1148 MG/L 0.080 mg/L - Resolved Jun 30, 2016 -
Apr 1, 2016 - Other No No - - - Resolved Sep 30, 2025 -
Apr 1, 2016 Jun 30, 2016 MCL Yes No .1148 MG/L 0.080 mg/L - Resolved Jun 30, 2016 -
Apr 1, 2016 - Other No No - - - Resolved Sep 30, 2025 -
Feb 1, 2016 Feb 29, 2016 MR No No - 5% of samples - Resolved Feb 29, 2016 -
Jan 1, 2016 Mar 31, 2016 MCL Yes No .1148 MG/L 0.080 mg/L - Resolved Mar 31, 2016 -
Jan 1, 2016 Mar 31, 2016 MCL Yes No .1148 MG/L 0.080 mg/L - Resolved Mar 31, 2016 -
Jan 1, 2016 Mar 31, 2016 MR No Yes - 0.060 mg/L - Resolved Mar 8, 2016 -
Jan 1, 2016 Mar 31, 2016 MR No Yes - 0.060 mg/L - Resolved Mar 8, 2016 -
Jan 1, 2016 Mar 31, 2016 MR No Yes - 0.060 mg/L - Resolved Mar 8, 2016 -
Jan 1, 2016 Mar 31, 2016 MR No Yes - 0.080 mg/L - Resolved Mar 8, 2016 -
Jan 1, 2016 Mar 31, 2016 MR No Yes - 0.080 mg/L - Resolved Mar 8, 2016 -
Jan 1, 2016 Mar 31, 2016 MR No Yes - 0.080 mg/L - Resolved Mar 8, 2016 -
Jan 1, 2016 Mar 31, 2016 MCL Yes No .1148 MG/L 0.080 mg/L - Resolved Mar 31, 2016 -
Oct 1, 2015 Dec 31, 2015 MCL Yes No .1076 MG/L 0.080 mg/L - Resolved Dec 31, 2015 -
Oct 1, 2015 - Other No No - - - Resolved Jul 1, 2016 -
Oct 1, 2015 Dec 31, 2015 MCL Yes No .1076 MG/L 0.080 mg/L - Resolved Dec 31, 2015 -
Oct 1, 2015 - Other No No - - - Resolved Jul 1, 2016 -
Jul 1, 2015 Sep 30, 2015 MCL Yes No .0844 MG/L 0.080 mg/L - Resolved Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MR No Yes - 0.080 mg/L - Resolved Sep 30, 2015 -
Jul 1, 2015 - Other No No - - - Resolved Jul 1, 2016 -
Jul 1, 2015 - Other No No - - - Resolved Jul 1, 2016 -
Jul 1, 2015 Sep 30, 2015 MCL Yes No .0844 MG/L 0.080 mg/L - Resolved Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MR No Yes - 0.080 mg/L - Resolved Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MR No Yes - 0.060 mg/L - Resolved Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MCL Yes No .0844 MG/L 0.080 mg/L - Resolved Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MR No Yes - 0.080 mg/L - Resolved Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MR No Yes - 0.060 mg/L - Resolved Sep 30, 2015 -

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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