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Cottonwood Day School BIA

Arizona — Community Water System — PWSID: NN0435004

System Information

PWSIDNN0435004
System NameCottonwood Day School BIA
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeFederal
EPA Region09
Serves SchoolYes
WholesalerNo
First ReportedFeb 2, 1984
Last ReportedDec 31, 2025

Location & Contact

StateArizona
CityChinle
ZIP Code86503
AddressPO Box 6003
OrganizationBIA Cottonwood Day School
Phone9287253256

Population & Service

Population Served185
Service Connections28

Drinking Water Violations (110)

This water system has 110 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
Mar 1, 2025 Mar 31, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2025 Revised Total Coliform Rule
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrite MR No Yes — 1 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Oct 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 30, 2023 Revised Total Coliform Rule
Oct 1, 2022 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 17, 2022 Revised Total Coliform Rule
May 1, 2020 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 19, 2020 Revised Total Coliform Rule
Feb 1, 2018 Feb 28, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Feb 28, 2018 Revised Total Coliform Rule
Feb 1, 2018 Feb 28, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Feb 28, 2018 Revised Total Coliform 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
Oct 1, 2012 Dec 31, 2012 Di(2-ethylhexyl) phthalate MCL Yes No .0068 MG/L 0.006 mg/L — Resolved Dec 31, 2012 Synthetic Organic Chemicals
Oct 1, 2012 Dec 31, 2012 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2012 Synthetic Organic Chemicals
Jul 1, 2012 Sep 30, 2012 Di(2-ethylhexyl) phthalate MCL Yes No .0068 MG/L 0.006 mg/L — Resolved Sep 30, 2012 Synthetic Organic Chemicals
Apr 1, 2012 Jun 30, 2012 Di(2-ethylhexyl) phthalate MCL Yes No .0068 MG/L 0.006 mg/L — Resolved Jun 30, 2012 Synthetic Organic Chemicals
Apr 1, 2012 Jun 30, 2012 Di(2-ethylhexyl) phthalate MCL Yes No .0068 MG/L 0.006 mg/L — Resolved Jun 30, 2012 Synthetic Organic Chemicals
Apr 1, 2012 Jun 30, 2012 Di(2-ethylhexyl) phthalate MCL Yes No .0068 MG/L 0.006 mg/L — Resolved Jun 30, 2012 Synthetic Organic Chemicals
Jan 1, 2010 Dec 31, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2009 Nov 30, 2009 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 12, 2009 Total Coliform Rule
Jan 1, 2008 Dec 31, 2010 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Dec 31, 2010 Synthetic Organic Chemicals
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Mar 7, 2009 Consumer Confidence Rule
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Mar 7, 2009 Consumer Confidence Rule
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Mar 7, 2009 Consumer Confidence Rule
Jul 1, 2005 — Consumer Confidence Rule Other No No — — — Resolved Mar 7, 2009 Consumer Confidence Rule
Jul 1, 2005 — Consumer Confidence Rule Other No No — — — Resolved Mar 7, 2009 Consumer Confidence Rule
Jul 1, 2005 — Consumer Confidence Rule Other No No — — — Resolved Mar 7, 2009 Consumer Confidence Rule
Jan 1, 2004 Dec 31, 2004 Simazine MR No No — 0.004 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Aldicarb MR No No — — — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Chlordane MR No No — 0.002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 1,2,4-Trichlorobenzene MR No No — 0.07 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Trichloroethylene MR No No — 0.005 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Endothall MR No No — 0.1 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 OXAMYL MR No No — 0.2 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Toxaphene MR No No — 0.003 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Di(2-ethylhexyl) phthalate MR No No — 0.006 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Tetrachloroethylene MR No No — 0.005 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 p-Dichlorobenzene MR No No — 0.075 mg/L — Resolved Dec 31, 2004 Volatile Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Dalapon MR No No — 0.2 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Benzo(a)pyrene MR No No — 0.0002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Total Polychlorinated Biphenyls (PCB) MR No No — 0.0005 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Aldicarb sulfoxide MR No No — — — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Heptachlor MR No No — 0.0004 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 2,3,7,8-TCDD MR No No — 0.00000003 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Endrin MR No No — 0.002 mg/L — Resolved Dec 31, 2004 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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