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Dilkon-Indian Wells-Greasewood-White Cone NTUA

Arizona — Community Water System — PWSID: NN0400342

System Information

PWSIDNN0400342
System NameDilkon-Indian Wells-Greasewood-White Cone 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
CityFort Defiance
ZIP Code86504
AddressPO Box 170
OrganizationSchools
Phone9287295721

Population & Service

Population Served4,986
Service Connections1,458

Drinking Water Violations (223)

This water system has 223 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, 2022 Jul 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2022 Revised Total Coliform Rule
Jul 1, 2022 — Public Notice Other No No — — — Resolved Oct 4, 2022 Public Notice Rule and Revised PN Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .0847 MG/L 0.080 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MCL Yes No .0847 MG/L 0.080 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .1027 MG/L 0.080 mg/L — Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2021 Sep 30, 2021 TTHM MCL Yes No .1027 MG/L 0.080 mg/L — Resolved Sep 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .1245 MG/L 0.080 mg/L — Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 Jun 30, 2021 TTHM MCL Yes No .1245 MG/L 0.080 mg/L — Resolved Jun 30, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 — Public Notice Other No No — — — Resolved Jul 14, 2021 Public Notice Rule and Revised PN Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .1283 MG/L 0.080 mg/L — Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 TTHM MCL Yes No .1283 MG/L 0.080 mg/L — Resolved Mar 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2020 Dec 31, 2020 TTHM MCL Yes No .1458 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 .1458 MG/L 0.080 mg/L — Resolved Dec 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .1435 MG/L 0.080 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .1435 MG/L 0.080 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2020 Jun 30, 2020 TTHM MCL Yes No .1037 MG/L 0.080 mg/L — Resolved Jun 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2020 — Public Notice Other No No — — — Resolved Apr 3, 2020 Public Notice Rule and Revised PN Rule
Apr 1, 2020 Jun 30, 2020 TTHM MCL Yes No .1037 MG/L 0.080 mg/L — Resolved Jun 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 TTHM MCL Yes No .1052 MG/L 0.080 mg/L — Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 TTHM MCL Yes No .1052 MG/L 0.080 mg/L — Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .1109 MG/L 0.080 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .1109 MG/L 0.080 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MCL Yes No .1119 MG/L 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MCL Yes No .1119 MG/L 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2019 Jun 30, 2019 TTHM MCL Yes No .1313 MG/L 0.080 mg/L — Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2019 Jun 30, 2019 TTHM MCL Yes No .1313 MG/L 0.080 mg/L — Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 TTHM MCL Yes No .086 MG/L 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 TTHM MCL Yes No .086 MG/L 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2018 — Public Notice Other No No — — — Resolved Dec 26, 2018 Public Notice Rule and Revised PN Rule
Oct 1, 2018 Dec 31, 2018 TTHM MCL Yes No .169 MG/L 0.080 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2018 Dec 31, 2018 TTHM MCL Yes No .169 MG/L 0.080 mg/L — Resolved Dec 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 TTHM MCL Yes No .1898 MG/L 0.080 mg/L — Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 TTHM MCL Yes No .1898 MG/L 0.080 mg/L — Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 TTHM MCL Yes No .1505 MG/L 0.080 mg/L — Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 TTHM MCL Yes No .1505 MG/L 0.080 mg/L — Resolved Jun 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Mar 31, 2018 TTHM MCL Yes No .1356 MG/L 0.080 mg/L — Resolved Mar 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2018 Mar 31, 2018 TTHM MCL Yes No .1356 MG/L 0.080 mg/L — Resolved Mar 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 — Public Notice Other No No — — — Resolved Jun 19, 2018 Public Notice Rule and Revised PN Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .1117 MG/L 0.080 mg/L — Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2017 Dec 31, 2017 TTHM MCL Yes No .1117 MG/L 0.080 mg/L — Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2017 Aug 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2017 Revised Total Coliform Rule
Aug 1, 2017 Aug 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2017 Revised Total Coliform Rule
Aug 1, 2017 Aug 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2017 Revised Total Coliform Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .0854 MG/L 0.080 mg/L — Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 TTHM MCL Yes No .0854 MG/L 0.080 mg/L — Resolved Sep 30, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 — Public Notice Other No No — — — Resolved Mar 1, 2018 Public Notice Rule and Revised PN Rule
Apr 1, 2017 — Public Notice Other No No — — — Resolved Mar 1, 2018 Public Notice Rule and Revised PN Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .1005 MG/L 0.080 mg/L — Resolved May 9, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .1005 MG/L 0.080 mg/L — Resolved May 9, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2017 Jun 30, 2017 TTHM MCL Yes No .1005 MG/L 0.080 mg/L — Resolved May 9, 2017 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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