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Sweetwater NTUA

Arizona — Community Water System — PWSID: NN0400399

System Information

PWSIDNN0400399
System NameSweetwater NTUA
System TypeCommunity Water System
Water SourceSurface Water Purchased
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 Served2,014
Service Connections589

Drinking Water Violations (156)

This water system has 156 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
Jul 1, 2025 Sep 30, 2025 Arsenic MCL Yes No .0107 MG/L 0.010 mg/L — Archived Sep 30, 2025 Arsenic Rule
Apr 1, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Apr 1, 2024 Jun 30, 2024 Arsenic MCL Yes No .01235 MG/L 0.010 mg/L — Resolved Jun 30, 2024 Arsenic Rule
Apr 1, 2024 Jun 30, 2024 Arsenic MCL Yes No .01235 MG/L 0.010 mg/L — Resolved Jun 30, 2024 Arsenic Rule
Jan 1, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Jan 1, 2024 Mar 31, 2024 Arsenic MCL Yes No .01348 MG/L 0.010 mg/L — Resolved Mar 31, 2024 Arsenic Rule
Jan 1, 2024 Mar 31, 2024 Arsenic MCL Yes No .01348 MG/L 0.010 mg/L — Resolved Mar 31, 2024 Arsenic Rule
Oct 1, 2023 — Public Notice Other No No — — — Resolved Oct 1, 2023 Public Notice Rule and Revised PN Rule
Oct 1, 2023 — Public Notice Other No No — — — Resolved Oct 1, 2023 Public Notice Rule and Revised PN Rule
Oct 1, 2023 Dec 31, 2023 Arsenic MCL Yes No .0132 MG/L 0.010 mg/L — Resolved Dec 31, 2023 Arsenic Rule
Oct 1, 2023 Dec 31, 2023 Arsenic MCL Yes No .0132 MG/L 0.010 mg/L — Resolved Dec 31, 2023 Arsenic Rule
Jul 1, 2023 Sep 30, 2023 Arsenic MCL Yes No .0108 MG/L 0.010 mg/L — Resolved Sep 30, 2023 Arsenic Rule
Jul 1, 2023 Sep 30, 2023 Arsenic MCL Yes No .0108 MG/L 0.010 mg/L — Resolved Sep 30, 2023 Arsenic Rule
Jan 1, 2022 Mar 31, 2022 Arsenic MR No Yes — 0.010 mg/L — Resolved Mar 31, 2022 Arsenic Rule
Jan 1, 2021 Mar 31, 2021 Arsenic MCL Yes No .0139 MG/L 0.010 mg/L — Resolved Mar 31, 2021 Arsenic Rule
Jan 1, 2021 Mar 31, 2021 Arsenic MCL Yes No .0139 MG/L 0.010 mg/L — Resolved Mar 31, 2021 Arsenic Rule
Jan 1, 2021 Mar 31, 2021 Arsenic MCL Yes No .0139 MG/L 0.010 mg/L — Resolved Mar 31, 2021 Arsenic Rule
Jan 1, 2021 — Public Notice Other No No — — — Resolved Dec 2, 2021 Public Notice Rule and Revised PN Rule
Oct 1, 2020 — Public Notice Other No No — — — Resolved Aug 27, 2021 Public Notice Rule and Revised PN Rule
Oct 1, 2020 — Public Notice Other No No — — — Resolved Aug 27, 2021 Public Notice Rule and Revised PN Rule
Oct 1, 2020 — Public Notice Other No No — — — Resolved Dec 2, 2021 Public Notice Rule and Revised PN Rule
Oct 1, 2020 — Public Notice Other No No — — — Resolved Dec 2, 2021 Public Notice Rule and Revised PN Rule
Oct 1, 2020 Dec 31, 2020 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L — Resolved Dec 31, 2020 Arsenic Rule
Oct 1, 2020 Dec 31, 2020 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L — Resolved Dec 31, 2020 Arsenic Rule
Oct 1, 2020 Dec 31, 2020 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L — Resolved Dec 31, 2020 Arsenic Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .0903 MG/L 0.080 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .0903 MG/L 0.080 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .0903 MG/L 0.080 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L — Resolved Sep 30, 2020 Arsenic Rule
Jul 1, 2020 — Public Notice Other No No — — — Resolved Apr 27, 2021 Public Notice Rule and Revised PN Rule
Jul 1, 2020 — Public Notice Other No No — — — Resolved Apr 27, 2021 Public Notice Rule and Revised PN Rule
Jul 1, 2020 Sep 30, 2020 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L — Resolved Sep 30, 2020 Arsenic Rule
Jul 1, 2020 Sep 30, 2020 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L — Resolved Sep 30, 2020 Arsenic Rule
Apr 1, 2020 — Public Notice Other No No — — — Resolved Apr 27, 2021 Public Notice Rule and Revised PN Rule
Apr 1, 2020 — Public Notice Other No No — — — Resolved Apr 27, 2021 Public Notice Rule and Revised PN Rule
Apr 1, 2020 Jun 30, 2020 Arsenic MCL Yes No .0119 MG/L 0.010 mg/L — Resolved Jun 30, 2020 Arsenic Rule
Apr 1, 2020 Jun 30, 2020 Arsenic MCL Yes No .0119 MG/L 0.010 mg/L — Resolved Jun 30, 2020 Arsenic Rule
Apr 1, 2020 Jun 30, 2020 Arsenic MCL Yes No .0119 MG/L 0.010 mg/L — Resolved Jun 30, 2020 Arsenic Rule
Apr 1, 2020 — Public Notice Other No No — — — Resolved Apr 27, 2021 Public Notice Rule and Revised PN 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
Jan 1, 2019 Mar 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Feb 12, 2019 Arsenic Rule
Apr 1, 2016 — Revised Total Coliform Rule Other No No — — — Resolved Mar 7, 2025 Revised Total Coliform Rule
Apr 1, 2016 — Revised Total Coliform Rule Other No No — — — Resolved Mar 7, 2025 Revised Total Coliform Rule
Sep 1, 2015 Sep 30, 2015 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2015 Total Coliform Rule
Sep 1, 2015 Sep 30, 2015 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2015 Total Coliform Rule
Sep 1, 2015 Sep 30, 2015 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2015 Total Coliform Rule
Sep 1, 2015 — Public Notice Other No No — — — Resolved Jul 1, 2016 Public Notice Rule and Revised PN Rule
Sep 1, 2015 — Public Notice Other No No — — — Resolved Jul 1, 2016 Public Notice Rule and Revised PN Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .01167 MG/L 0.010 mg/L — Resolved Jun 30, 2014 Arsenic 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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