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Cocopah West

Arizona — Community Water System — PWSID: 090400071

System Information

PWSID090400071
System NameCocopah West
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedFeb 2, 1984
Last ReportedDec 31, 2025

Location & Contact

StateArizona
CitySomerton
ZIP Code85350
Address14515 So. Veterans Dr.
OrganizationCocopah Indian Tribe
Phone9286272102

Population & Service

Population Served325
Service Connections90

Drinking Water Violations (159)

This water system has 159 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
May 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 23, 2025 Revised Total Coliform Rule
May 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 23, 2025 Revised Total Coliform Rule
May 1, 2025 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 23, 2025 Revised Total Coliform Rule
Dec 1, 2014 — Public Notice Other No No — — — Resolved Jul 1, 2015 Public Notice Rule and Revised PN Rule
Dec 1, 2014 — Public Notice Other No No — — — Resolved Jul 1, 2015 Public Notice Rule and Revised PN Rule
Dec 1, 2014 — Groundwater Rule TT Yes No — — — Resolved Jul 1, 2015 Ground Water Rule
Dec 1, 2014 — Groundwater Rule TT Yes No — — — Resolved Jul 1, 2015 Ground Water Rule
Nov 1, 2013 Nov 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2013 Total Coliform Rule
Sep 1, 2013 Sep 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2013 Total Coliform Rule
Sep 1, 2012 Sep 30, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Jun 1, 2012 Jun 30, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2012 Total Coliform Rule
May 1, 2012 May 31, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 2012 Total Coliform Rule
Apr 1, 2012 Apr 30, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2012 Total Coliform Rule
Jan 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Feb 20, 2014 Lead and Copper Rule
Jan 1, 2010 Dec 31, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
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
Jan 1, 2009 Dec 31, 2009 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2009 Nitrate Rule
Jan 1, 2009 Dec 31, 2009 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2008 Sep 30, 2008 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2008 Total Coliform Rule
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Mar 31, 2010 Consumer Confidence Rule
Jul 1, 2006 Jul 31, 2006 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 2006 Total Coliform Rule
Jun 1, 2006 Jun 30, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2006 Total Coliform Rule
May 1, 2006 May 31, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 2006 Total Coliform Rule
May 1, 2006 May 31, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 2006 Total Coliform Rule
Apr 1, 2006 Apr 30, 2006 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2006 Total Coliform Rule
Oct 1, 2005 Oct 31, 2005 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2005 Total Coliform Rule
Jul 1, 2005 Jul 31, 2005 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2005 Total Coliform Rule
Jul 1, 2005 — Consumer Confidence Rule Other No No — — — Resolved Mar 31, 2010 Consumer Confidence Rule
Jun 1, 2005 Jun 30, 2005 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2005 Total Coliform Rule
May 1, 2005 May 31, 2005 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 2005 Total Coliform Rule
Apr 1, 2005 Apr 30, 2005 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2005 Total Coliform Rule
Jan 1, 2005 Dec 31, 2005 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2005 Nitrate Rule
Jan 1, 2004 Dec 31, 2004 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Endothall MR No Yes — 0.1 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 LASSO MR No Yes — — — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2004 Nitrate Rule
Jan 1, 2004 Dec 31, 2004 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Carbofuran MR No Yes — 0.04 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2004 Dec 31, 2004 Atrazine MR No Yes — 0.003 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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