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LANGDON LAKE WATER COOPERATIVE

Oregon — Transient Non-Community — PWSID: OR4194930

System Information

PWSIDOR4194930
System NameLANGDON LAKE WATER COOPERATIVE
System TypeTransient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedAug 26, 1995
Last ReportedMar 25, 2026

Location & Contact

StateOregon
CityPENDLETON
ZIP Code97801
AddressPO BOX 1046
OrganizationLANGDON LAKE WATER COOPERATIVE
Phone541-276-3476

Population & Service

Population Served25
Service Connections64

Drinking Water Violations (43)

This water system has 43 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
Oct 4, 2025 — MR No No — — — Unaddressed — —
Dec 1, 2022 Dec 31, 2022 MON No Yes — — — Resolved Dec 31, 2022 —
Feb 1, 2022 Feb 28, 2022 MON No Yes — — — Resolved Feb 28, 2022 —
Jan 1, 2011 Dec 31, 2011 MR No Yes — 10 mg/L — Resolved Dec 31, 2011 —
Jan 1, 2011 Dec 31, 2011 MR No Yes — 10 mg/L — Resolved Dec 31, 2011 —
Oct 1, 2010 Oct 31, 2010 MCL Yes No — 5% of samples — Resolved Oct 31, 2010 —
Oct 1, 2010 Oct 31, 2010 MCL Yes No — 5% of samples — Resolved Oct 31, 2010 —
Oct 1, 2010 Oct 31, 2010 MCL Yes No — 5% of samples — Resolved Oct 31, 2010 —
Oct 1, 2010 Oct 31, 2010 MCL Yes No — 5% of samples — Resolved Oct 31, 2010 —
Oct 1, 2010 Oct 31, 2010 MCL Yes No — 5% of samples — Resolved Oct 31, 2010 —
Sep 1, 2010 — MR No Yes — — — Resolved Oct 13, 2010 —
Sep 1, 2010 — MR No Yes — — — Resolved Oct 13, 2010 —
Jul 1, 2009 Sep 30, 2009 MCL Yes No — 5% of samples — Resolved Sep 30, 2009 —
Jul 1, 2009 Sep 30, 2009 MCL Yes No — 5% of samples — Resolved Sep 30, 2009 —
Jul 1, 2009 Sep 30, 2009 MCL Yes No — 5% of samples — Resolved Sep 30, 2009 —
Jul 1, 2009 Sep 30, 2009 MCL Yes No — 5% of samples — Resolved Sep 30, 2009 —
Jan 1, 2005 Dec 31, 2005 MR No Yes — 10 mg/L — Resolved Dec 31, 2005 —
Dec 1, 2002 Dec 31, 2002 MR No No — 5% of samples — Resolved Dec 31, 2002 —
Nov 1, 2002 Nov 30, 2002 MR No No — 5% of samples — Resolved Nov 30, 2002 —
Oct 1, 2002 Dec 31, 2002 MR No No — 5% of samples — Resolved Dec 31, 2002 —
Oct 1, 2002 Dec 31, 2002 MCL Yes No — 5% of samples — Resolved Dec 31, 2002 —
Oct 1, 2002 Dec 31, 2002 MCL Yes No — 5% of samples — Resolved Dec 31, 2002 —
Nov 1, 2001 Dec 31, 2001 MCL Yes No — 5% of samples — Resolved Dec 31, 2001 —
Nov 1, 2001 Dec 31, 2001 MR No No — 5% of samples — Resolved Dec 31, 2001 —
Jan 1, 2001 Dec 31, 2001 MR No Yes — 10 mg/L — Resolved Dec 31, 2001 —
Jan 1, 2001 Mar 31, 2001 MR No No — 5% of samples — Resolved Mar 31, 2001 —
Oct 1, 2000 Dec 31, 2000 MCL Yes No — 5% of samples — Resolved Dec 31, 2000 —
Oct 1, 2000 Dec 31, 2000 MCL Yes No — 5% of samples — Resolved Dec 31, 2000 —
Jan 1, 2000 Mar 31, 2000 MR No No — 5% of samples — Resolved Mar 31, 2000 —
Oct 1, 1999 Dec 31, 1999 MR No No — 5% of samples — Resolved Dec 31, 1999 —
Jul 1, 1999 Sep 30, 1999 MCL Yes No — 5% of samples — Resolved Sep 30, 1999 —
Apr 1, 1998 Jun 30, 1998 MR No No — 5% of samples — Resolved Jun 30, 1998 —
Jan 1, 1998 Mar 31, 1998 MR No No — 5% of samples — Resolved Mar 31, 1998 —
Oct 1, 1997 Dec 31, 1997 MR No No — 5% of samples — Resolved Dec 31, 1997 —
Jul 1, 1997 Sep 30, 1997 MR No No — 5% of samples — Resolved Sep 30, 1997 —
Apr 1, 1997 Jun 30, 1997 MCL Yes No — 5% of samples — Resolved Jun 30, 1997 —
Jan 1, 1997 Mar 31, 1997 MR No No — 5% of samples — Resolved Mar 31, 1997 —
Jan 1, 1997 Dec 31, 1997 MR No Yes — 10 mg/L — Resolved Dec 31, 1997 —
Apr 1, 1996 Jun 30, 1996 MR No No — 5% of samples — Resolved Jun 30, 1996 —
Jan 1, 1996 Dec 31, 1996 MR No Yes — 10 mg/L — Resolved Dec 31, 1996 —
Oct 1, 1995 Dec 31, 1995 MR No No — 5% of samples — Resolved Dec 31, 1995 —
Jul 1, 1995 Sep 30, 1995 MR No No — 5% of samples — Resolved Sep 30, 1995 —
Apr 1, 1995 Jun 30, 1995 MR No No — 5% of samples — Resolved Jun 30, 1995 —

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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