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Iyanbito NTUA

Arizona — Community Water System — PWSID: NN3500258

System Information

PWSIDNN3500258
System NameIyanbito NTUA
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region09
Serves SchoolNo
WholesalerNo
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 Served797
Service Connections233

Drinking Water Violations (145)

This water system has 145 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 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2020 Nitrate Rule
Jan 1, 2020 Dec 31, 2020 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2020 Nitrate Rule
Jan 1, 2020 Dec 31, 2020 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2020 Nitrate 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, 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 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2020 Nitrate Rule
Jan 1, 2020 Dec 31, 2020 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2020 Nitrate Rule
Jan 1, 2020 Dec 31, 2020 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2020 Nitrate Rule
Apr 1, 2016 — Revised Total Coliform Rule Other No No — — — Unaddressed — Revised Total Coliform Rule
Apr 1, 2014 Apr 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2014 Total Coliform Rule
Apr 1, 2014 Apr 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2014 Total Coliform Rule
Apr 1, 2014 Apr 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2014 Total Coliform Rule
Jan 1, 2014 Dec 31, 2014 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jan 1, 2014 Dec 31, 2014 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jan 1, 2014 Dec 31, 2014 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jan 1, 2014 Dec 31, 2014 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jan 1, 2014 Dec 31, 2014 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jan 1, 2014 Dec 31, 2014 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2014 Nitrate 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
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 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2010 Nitrate Rule
Jan 1, 2008 Dec 31, 2010 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Barium MR No Yes — 2 mg/L — Resolved Dec 31, 2010 Inorganic Chemicals
Jan 1, 2008 Dec 31, 2010 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 ETHYLENE DIBROMIDE MR No Yes — 0.00005 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 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2010 Volatile Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2010 Arsenic Rule
Jan 1, 2008 Dec 31, 2010 Fluoride MR No Yes — 4.0 mg/L — Resolved Dec 31, 2010 Inorganic Chemicals
Jan 1, 2008 Dec 31, 2010 Fluoride MR No Yes — 4.0 mg/L — Resolved Dec 31, 2010 Inorganic Chemicals
Jan 1, 2008 Dec 31, 2010 Fluoride MR No Yes — 4.0 mg/L — Resolved Dec 31, 2010 Inorganic Chemicals
Jan 1, 2008 Dec 31, 2010 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2010 Arsenic Rule
Jan 1, 2008 Dec 31, 2010 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2010 Arsenic Rule
Jan 1, 2008 Dec 31, 2010 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 2010 Volatile 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 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2010 Synthetic 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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