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Product Safety9,700+ CPSC product recalls Food Safety28,600+ FDA food recalls Pet Safety1.3M FDA animal adverse events Drug Safety17,500+ FDA drug recalls Device Safety38,400+ FDA device recalls Workplace Safety102,900+ OSHA injury reports Brand HistoryRecall lookup by company

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SENTINEL GAP WATER ASSN

Washington — Community Water System — PWSID: WA5376620

System Information

PWSIDWA5376620
System NameSENTINEL GAP WATER ASSN
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedFeb 7, 1981
Last ReportedMar 26, 2026

Location & Contact

StateWashington
CityMattawa
ZIP Code99349
Address706 Desert Aire Dr SW
OrganizationSENTINEL GAP WATER ASSN
Phone—

Population & Service

Population Served226
Service Connections68

Drinking Water Violations (59)

This water system has 59 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
Nov 1, 2023 Nov 30, 2023 MON No Yes — — — Resolved Nov 30, 2023 —
Jul 1, 2023 — Other No No — — — Resolved Sep 20, 2023 —
Sep 1, 2022 Sep 30, 2022 MON No Yes — — — Resolved Sep 30, 2022 —
Aug 1, 2017 Aug 31, 2017 MON No Yes — — — Resolved Aug 31, 2017 —
Sep 1, 2015 Sep 30, 2015 MR No No — 5% of samples — Resolved Sep 30, 2015 —
Jul 1, 2014 — Other No No — — — Resolved Aug 22, 2014 —
Jul 1, 2012 — Other No No — — — Resolved Oct 1, 2012 —
Jun 1, 2006 Jun 30, 2006 MR No No — 5% of samples — Archived Jun 30, 2006 —
May 1, 2006 May 31, 2006 MR No No — 5% of samples — Archived May 31, 2006 —
Apr 1, 2006 Apr 30, 2006 MR No No — 5% of samples — Archived Apr 30, 2006 —
Mar 1, 2006 Mar 31, 2006 MR No No — 5% of samples — Archived Mar 31, 2006 —
Feb 1, 2006 Feb 28, 2006 MR No No — 5% of samples — Archived Feb 28, 2006 —
Jan 1, 2006 Jan 31, 2006 MR No No — 5% of samples — Archived Jan 31, 2006 —
Oct 1, 2005 Oct 31, 2005 MR No No — 5% of samples — Archived Oct 31, 2005 —
Sep 1, 2005 Sep 30, 2005 MR No No — 5% of samples — Archived Sep 30, 2005 —
Aug 1, 2005 Aug 31, 2005 MR No No — 5% of samples — Archived Aug 31, 2005 —
Jul 1, 2005 Jul 31, 2005 MR No No — 5% of samples — Archived Jul 31, 2005 —
Jun 1, 2005 Jun 30, 2005 MR No No — 5% of samples — Archived Jun 30, 2005 —
May 1, 2005 May 31, 2005 MR No No — 5% of samples — Archived May 31, 2005 —
Mar 1, 2005 Mar 31, 2005 MCL Yes No — 5% of samples — Archived Mar 31, 2005 —
Sep 1, 2004 Sep 30, 2004 MCL Yes No — 5% of samples — Archived Sep 30, 2004 —
May 1, 2004 May 31, 2004 MR No No — 5% of samples — Archived May 31, 2004 —
Sep 1, 2003 Sep 30, 2003 MR No No — 5% of samples — Archived Sep 30, 2003 —
Sep 1, 2000 Sep 30, 2000 MR No Yes — 5% of samples — Archived Sep 30, 2000 —
Jul 1, 2000 Jul 2, 2003 Other No Yes — — — Resolved Jul 2, 2003 —
Oct 19, 1999 Oct 20, 2002 Other No Yes — — — Resolved Oct 20, 2002 —
Oct 19, 1999 Oct 20, 2002 Other No Yes — — — Resolved Oct 20, 2002 —
Oct 1, 1999 Oct 31, 1999 MR No Yes — 5% of samples — Archived Oct 31, 1999 —
Apr 1, 1999 Apr 30, 1999 MCL Yes No — 5% of samples — Archived Apr 30, 1999 —
Apr 1, 1999 Apr 30, 1999 MCL Yes No — 5% of samples — Archived Apr 30, 1999 —
Apr 1, 1999 Apr 30, 1999 MCL Yes No — 5% of samples — Archived Apr 30, 1999 —
Apr 1, 1999 Apr 30, 1999 MCL Yes No — 5% of samples — Archived Apr 30, 1999 —
Mar 1, 1999 Mar 31, 1999 MR No Yes — 5% of samples — Archived Mar 31, 1999 —
Mar 1, 1999 Mar 31, 1999 MR No Yes — 5% of samples — Archived Mar 31, 1999 —
Feb 1, 1999 Feb 28, 1999 MCL Yes No — 5% of samples — Archived Feb 28, 1999 —
Feb 1, 1999 Feb 28, 1999 MCL Yes No — 5% of samples — Archived Feb 28, 1999 —
Feb 1, 1999 Feb 28, 1999 MCL Yes No — 5% of samples — Archived Feb 28, 1999 —
Feb 1, 1999 Feb 28, 1999 MCL Yes No — 5% of samples — Archived Feb 28, 1999 —
Oct 1, 1998 Oct 31, 1998 MCL Yes No — 5% of samples — Archived Oct 31, 1998 —
Oct 1, 1998 Oct 31, 1998 MCL Yes No — 5% of samples — Archived Oct 31, 1998 —
Oct 1, 1998 Oct 31, 1998 MCL Yes No — 5% of samples — Archived Oct 31, 1998 —
Oct 1, 1998 Oct 31, 1998 MCL Yes No — 5% of samples — Archived Oct 31, 1998 —
Jun 1, 1998 Jun 30, 1998 MCL Yes No — 5% of samples — Archived Jun 30, 1998 —
Jun 1, 1998 Jun 30, 1998 MCL Yes No — 5% of samples — Archived Jun 30, 1998 —
Jun 1, 1998 Jun 30, 1998 MCL Yes No — 5% of samples — Archived Jun 30, 1998 —
Jun 1, 1998 Jun 30, 1998 MCL Yes No — 5% of samples — Archived Jun 30, 1998 —
Jul 1, 1997 Jan 1, 1999 MR No No — TT — Resolved Jan 1, 1999 —
Jul 1, 1997 Jan 1, 1999 MR No No — TT — Resolved Jan 1, 1999 —
Oct 1, 1979 Oct 31, 1979 MR No No — 10 mg/L — Archived Oct 31, 1979 —
Oct 1, 1979 Oct 31, 1979 MR No No — 0.05 mg/L — Archived Oct 31, 1979 —

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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