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Tsaile-Dine College NTUA

Arizona — Community Water System — PWSID: NN0403005

System Information

PWSIDNN0403005
System NameTsaile-Dine College 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 Served1,190
Service Connections348

Drinking Water Violations (124)

This water system has 124 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, 2020 Dec 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Dec 31, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Jan 1, 2018 Dec 31, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Jan 1, 2018 Dec 31, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2018 Arsenic Rule
Apr 1, 2016 — Revised Total Coliform Rule Other No No — — — Resolved Feb 10, 2025 Revised Total Coliform Rule
Apr 1, 2016 — Revised Total Coliform Rule Other No No — — — Resolved Feb 10, 2025 Revised Total Coliform Rule
Jan 1, 2015 Mar 31, 2015 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2015 Radionuclides and Revised Rad Rule
Jan 1, 2015 Mar 31, 2015 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2015 Radionuclides and Revised Rad Rule
Jan 1, 2015 Mar 31, 2015 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2015 Radionuclides and Revised Rad Rule
Jan 1, 2014 Mar 31, 2014 Arsenic MCL Yes No .0314 MG/L 0.010 mg/L — Resolved Mar 31, 2014 Arsenic Rule
Jan 1, 2014 Mar 31, 2014 Arsenic MCL Yes No .0314 MG/L 0.010 mg/L — Resolved Mar 31, 2014 Arsenic Rule
Jan 1, 2014 Mar 31, 2014 Arsenic MCL Yes No .0314 MG/L 0.010 mg/L — Resolved Mar 31, 2014 Arsenic Rule
Jan 1, 2014 — Public Notice Other No No — — — Resolved Jun 25, 2015 Public Notice Rule and Revised PN Rule
Jan 1, 2014 — Public Notice Other No No — — — Resolved Jun 25, 2015 Public Notice Rule and Revised PN Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts 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
Jul 1, 2011 Jul 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2011 Total Coliform Rule
Jul 1, 2011 Jul 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2011 Total Coliform Rule
Jul 1, 2011 Jul 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2011 Total Coliform Rule
Jan 1, 2010 Dec 31, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Dec 31, 2010 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2010 Nitrate Rule
Jan 1, 2010 Dec 31, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Dec 31, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Dec 31, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Dec 31, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Dec 31, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Dec 31, 2010 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2010 Nitrate Rule
Jan 1, 2008 Dec 31, 2010 Chromium MR No Yes — 0.1 mg/L — Resolved Dec 31, 2010 Inorganic Chemicals
Jan 1, 2008 Dec 31, 2010 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Glyphosate MR No Yes — 0.7 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,4-D MR No Yes — 0.07 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 LASSO MR No Yes — — — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals

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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