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RIVERGROVE WATER DISTRICT

Oregon — Community Water System — PWSID: OR4100461

System Information

PWSIDOR4100461
System NameRIVERGROVE WATER DISTRICT
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedMar 12, 1979
Last ReportedDec 23, 2025

Location & Contact

StateOregon
CityLAKE OSWEGO
ZIP Code97035
Address17661 PILKINGTON RD
OrganizationRIVERGROVE WATER DISTRICT
Phone503-936-5304

Population & Service

Population Served4,000
Service Connections1,380

Drinking Water Violations (64)

This water system has 64 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, 2020 Dec 31, 2020 COLIPHAGE MR No Yes — — — Resolved Dec 31, 2020 Ground Water Rule
Jan 1, 2020 Dec 31, 2020 COLIPHAGE MR No Yes — — — Resolved Dec 31, 2020 Ground Water Rule
Jan 1, 2020 Dec 31, 2020 COLIPHAGE MR No Yes — — — Resolved Dec 31, 2020 Ground Water Rule
Jan 1, 2017 Dec 31, 2017 COLIPHAGE MR No Yes — — — Resolved Dec 31, 2017 Ground Water Rule
Jan 1, 2017 Dec 31, 2017 COLIPHAGE MR No Yes — — — Resolved Dec 31, 2017 Ground Water Rule
Jan 1, 2017 Dec 31, 2017 COLIPHAGE MR No Yes — — — Resolved Dec 31, 2017 Ground Water Rule
Jan 1, 2013 Dec 31, 2013 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2013 Nitrate Rule
Oct 1, 2012 Oct 31, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2012 Total Coliform Rule
Oct 1, 2012 Oct 31, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2012 Total Coliform Rule
Oct 1, 2012 Oct 31, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2012 Total Coliform Rule
Oct 1, 2012 Oct 31, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2012 Total Coliform Rule
Oct 1, 2012 Oct 31, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2012 Total Coliform Rule
Sep 27, 2012 — E. COLI MR No No — — — Resolved Oct 18, 2012 Ground Water Rule
Sep 27, 2012 — E. COLI MR No No — — — Resolved Oct 18, 2012 Ground Water Rule
Sep 1, 2012 Sep 30, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Sep 1, 2012 Sep 30, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Sep 1, 2012 Sep 30, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Sep 1, 2012 Sep 30, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Sep 1, 2012 Sep 30, 2012 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 2012 Total Coliform Rule
Jan 1, 2011 Dec 31, 2013 Di(2-ethylhexyl) adipate MR No No — 0.4 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Total Polychlorinated Biphenyls (PCB) MR No No — 0.0005 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 2,4-D MR No No — 0.07 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Benzo(a)pyrene MR No No — 0.0002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Di(2-ethylhexyl) phthalate MR No No — 0.006 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Glyphosate MR No No — 0.7 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Sep 1, 1998 Sep 30, 1998 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 30, 1998 Total Coliform Rule
Jul 1, 1998 Jul 31, 1998 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 1998 Total Coliform Rule
Jun 1, 1997 Jun 30, 1997 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jun 30, 1997 Total Coliform Rule
Oct 1, 1994 Oct 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 1994 Total Coliform Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Nov 8, 1994 Lead and Copper Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Nov 8, 1994 Lead and Copper Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Nov 8, 1994 Lead and Copper Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Nov 8, 1994 Lead and Copper Rule
Jan 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Mar 3, 1995 Lead and Copper Rule
Jan 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Mar 3, 1995 Lead and Copper Rule
Jan 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Mar 3, 1995 Lead and Copper Rule
Jan 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Mar 3, 1995 Lead and Copper Rule
Jun 1, 1993 Jun 30, 1993 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 1993 Total Coliform Rule
Apr 1, 1993 Apr 30, 1993 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 1993 Total Coliform Rule
Mar 1, 1993 Mar 31, 1993 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 1993 Total Coliform Rule
Feb 1, 1993 Feb 28, 1993 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 1993 Total Coliform Rule
Dec 1, 1992 Dec 31, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 1992 Total Coliform Rule
Nov 1, 1992 Nov 30, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 1992 Total Coliform Rule
Sep 1, 1992 Sep 30, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 1992 Total Coliform Rule
Aug 1, 1992 Aug 31, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Aug 31, 1992 Total Coliform Rule
Jul 1, 1992 Jul 31, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1992 Total Coliform Rule
Jun 1, 1992 Jun 30, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 1992 Total Coliform Rule
May 1, 1992 May 31, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 1992 Total Coliform Rule
Mar 1, 1992 Mar 31, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 1992 Total Coliform Rule
Jan 1, 1992 Jan 31, 1992 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 1992 Total Coliform 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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