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Coppermine NTUA

Arizona — Community Water System — PWSID: NN0400814

System Information

PWSIDNN0400814
System NameCoppermine NTUA
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedDec 1, 2005
Last ReportedDec 31, 2025

Location & Contact

StateArizona
CityFt Defiance
ZIP Code86504
AddressOffice of Deputy General Manager
OrganizationNavajo Tribal Utility Authority
Phone9287296277

Population & Service

Population Served342
Service Connections100

Drinking Water Violations (37)

This water system has 37 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, 2022 Mar 31, 2022 Arsenic MR No Yes — 0.010 mg/L — Resolved Mar 31, 2022 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Feb 5, 2019 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Feb 5, 2019 Arsenic Rule
Jan 1, 2019 Mar 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Feb 5, 2019 Arsenic Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .011 MG/L 0.010 mg/L — Resolved Mar 31, 2017 Arsenic Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .011 MG/L 0.010 mg/L — Resolved Mar 31, 2017 Arsenic Rule
Jan 1, 2017 — Public Notice Other No No — — — Resolved Jun 29, 2017 Public Notice Rule and Revised PN Rule
Jan 1, 2017 — Public Notice Other No No — — — Resolved Jun 29, 2017 Public Notice Rule and Revised PN Rule
Jan 1, 2017 Mar 31, 2017 Arsenic MCL Yes No .011 MG/L 0.010 mg/L — Resolved Mar 31, 2017 Arsenic Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Resolved Feb 23, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Resolved Feb 23, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No Yes — — — Resolved Feb 23, 2023 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
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, 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 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Mar 18, 2009 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Mar 18, 2009 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Mar 18, 2009 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 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 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2005 Dec 31, 2010 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Jan 1, 2005 Dec 31, 2010 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
Jan 1, 2005 Dec 31, 2010 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2010 Radionuclides and Revised Rad Rule
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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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