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Tsehootsooi Middle School

Arizona — Community Water System — PWSID: NN0400181

System Information

PWSIDNN0400181
System NameTsehootsooi Middle School
System TypeCommunity Water System
Water SourceGround Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolYes
WholesalerNo
First ReportedFeb 2, 1984
Last ReportedDec 31, 2025

Location & Contact

StateArizona
CityFort Defiance
ZIP Code86504
AddressPO Box 559
OrganizationWindow Rock Unified School District #8
Phone9287296706

Population & Service

Population Served875
Service Connections116

Drinking Water Violations (302)

This water system has 302 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
Aug 1, 2025 — Revised Total Coliform Rule RPT No No — — — Unaddressed — Revised Total Coliform Rule
Jul 1, 2025 — Revised Total Coliform Rule RPT No No — — — Unaddressed — Revised Total Coliform Rule
Jun 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 17, 2025 Revised Total Coliform Rule
May 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 17, 2025 Revised Total Coliform Rule
Apr 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 17, 2025 Revised Total Coliform Rule
Mar 1, 2025 Mar 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2025 Revised Total Coliform Rule
Mar 1, 2025 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Mar 1, 2025 Mar 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2025 Revised Total Coliform Rule
Mar 1, 2025 Mar 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2025 Revised Total Coliform Rule
Nov 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Jan 10, 2025 Revised Total Coliform Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Dec 16, 2024 Consumer Confidence Rule
Jul 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Feb 20, 2025 Lead and Copper Rule
Jul 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Feb 20, 2025 Lead and Copper Rule
Jun 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Aug 8, 2024 Revised Total Coliform Rule
May 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Aug 9, 2024 Revised Total Coliform Rule
Apr 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Aug 8, 2024 Revised Total Coliform Rule
Mar 1, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Mar 1, 2024 Mar 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2024 Revised Total Coliform Rule
Feb 1, 2024 Feb 29, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Feb 29, 2024 Revised Total Coliform Rule
Feb 1, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Jan 1, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Jan 1, 2024 Jan 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2024 Revised Total Coliform Rule
Jan 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Feb 20, 2025 Lead and Copper Rule
Nov 1, 2023 Nov 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2023 Revised Total Coliform Rule
Oct 1, 2023 Oct 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2023 Revised Total Coliform Rule
Aug 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 20, 2023 Revised Total Coliform Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Dec 16, 2024 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Dec 16, 2024 Consumer Confidence Rule
May 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Aug 10, 2023 Revised Total Coliform Rule
Feb 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Apr 10, 2023 Revised Total Coliform Rule
Jan 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Apr 10, 2023 Revised Total Coliform Rule
Dec 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Dec 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Dec 1, 2022 — Public Notice Other No No — — — Resolved Dec 16, 2024 Public Notice Rule and Revised PN Rule
Dec 1, 2022 — Public Notice Other No No — — — Resolved Dec 16, 2024 Public Notice Rule and Revised PN Rule
Aug 1, 2022 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 16, 2022 Revised Total Coliform Rule
Jul 1, 2022 — Consumer Confidence Rule Other No No — — — Resolved Dec 16, 2024 Consumer Confidence Rule
Jul 1, 2022 — Consumer Confidence Rule Other No No — — — Resolved Dec 16, 2024 Consumer Confidence Rule
Apr 1, 2022 Apr 30, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2022 Revised Total Coliform Rule
Apr 1, 2022 — Public Notice Other No No — — — Resolved Dec 16, 2024 Public Notice Rule and Revised PN Rule
Apr 1, 2022 — Public Notice Other No No — — — Resolved Dec 16, 2024 Public Notice Rule and Revised PN Rule
Aug 1, 2021 Aug 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2021 Revised Total Coliform Rule
Dec 1, 2020 Dec 31, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2020 Revised Total Coliform Rule
Nov 1, 2020 Nov 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2020 Revised Total Coliform Rule
Jul 1, 2020 Jul 31, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2020 Revised Total Coliform Rule
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Apr 19, 2021 Consumer Confidence Rule
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Apr 19, 2021 Consumer Confidence Rule
Jun 1, 2020 Jun 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2020 Revised Total Coliform Rule
May 1, 2020 May 31, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved May 31, 2020 Revised Total Coliform 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

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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