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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

Infrastructure

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LOCKE WATER WORKS CO [SWS]

California - Community Water System - PWSID: CA3400138

System Information

PWSIDCA3400138
System NameLOCKE WATER WORKS CO [SWS]
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedMar 22, 1979
Last ReportedMar 20, 2026

Location & Contact

StateCalifornia
CityWALNUT GROVE
ZIP Code95690
AddressP O Box 984
OrganizationCHU, CLARENCE
Phone916-776-1684

Population & Service

Population Served80
Service Connections44

Drinking Water Violations (104)

This water system has 104 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 1, 2024 - MR No No - TT - Unaddressed - -
Jan 1, 2021 Mar 31, 2021 MCL Yes No .031 UG/L 0.010 mg/L .01 Archived Mar 31, 2021 -
Oct 1, 2017 - MR No No - TT - Addressed - -
Oct 1, 2017 Dec 31, 2017 MCL Yes No .0243 UG/L 0.010 mg/L .005 Archived Dec 31, 2017 -
Jul 1, 2017 Sep 30, 2017 MCL Yes No 25 UG/L 0.010 mg/L 10 Archived Sep 30, 2017 -
Jul 1, 2017 Sep 30, 2017 MCL Yes No 25 UG/L 0.010 mg/L 10 Archived Sep 30, 2017 -
Jan 1, 2017 Mar 31, 2017 MCL Yes No .0137 MG/L 0.010 mg/L .01 Archived Mar 31, 2017 -
Jan 1, 2017 Mar 31, 2017 MCL Yes No .0137 MG/L 0.010 mg/L .01 Archived Mar 31, 2017 -
Oct 1, 2016 Dec 31, 2016 MCL Yes No .021 MG/L 0.010 mg/L .01 Archived Dec 31, 2016 -
Oct 1, 2016 Dec 31, 2016 MCL Yes No .021 MG/L 0.010 mg/L .01 Archived Dec 31, 2016 -
Jul 1, 2016 Sep 30, 2016 MCL Yes No .021 MG/L 0.010 mg/L .01 Archived Sep 30, 2016 -
Jul 1, 2016 Sep 30, 2016 MCL Yes No .021 MG/L 0.010 mg/L .01 Archived Sep 30, 2016 -
Apr 1, 2016 Jun 30, 2016 MCL Yes No .028 MG/L 0.010 mg/L .01 Archived Jun 30, 2016 -
Apr 1, 2016 Jun 30, 2016 MCL Yes No .028 MG/L 0.010 mg/L .01 Archived Jun 30, 2016 -
Jan 1, 2016 Mar 31, 2016 MCL Yes No .0297 MG/L 0.010 mg/L .01 Archived Mar 31, 2016 -
Jan 1, 2016 Mar 31, 2016 MCL Yes No .0297 MG/L 0.010 mg/L .01 Archived Mar 31, 2016 -
Oct 1, 2015 Dec 31, 2015 MCL Yes No .0303 MG/L 0.010 mg/L .01 Archived Dec 31, 2015 -
Oct 1, 2015 Dec 31, 2015 MCL Yes No .0303 MG/L 0.010 mg/L .01 Archived Dec 31, 2015 -
Jul 1, 2015 - Other No No - - - Resolved Nov 10, 2015 -
Jul 1, 2015 Sep 30, 2015 MCL Yes No .031 MG/L 0.010 mg/L .01 Archived Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MCL Yes No .031 MG/L 0.010 mg/L .01 Archived Sep 30, 2015 -
Apr 1, 2015 Jun 30, 2015 MCL Yes No .02975 MG/L 0.010 mg/L .01 Archived Jun 30, 2015 -
Apr 1, 2015 Jun 30, 2015 MCL Yes No .02975 MG/L 0.010 mg/L .01 Archived Jun 30, 2015 -
Jan 1, 2015 Mar 31, 2015 MCL Yes No .03 MG/L 0.010 mg/L .01 Archived Mar 31, 2015 -
Jan 1, 2015 Mar 31, 2015 MCL Yes No .03 MG/L 0.010 mg/L .01 Archived Mar 31, 2015 -
Oct 1, 2014 Dec 31, 2014 MCL Yes No .03175 MG/L 0.010 mg/L .01 Archived Dec 31, 2014 -
Oct 1, 2014 Dec 31, 2014 MCL Yes No .03175 MG/L 0.010 mg/L .01 Archived Dec 31, 2014 -
Jul 1, 2014 Sep 30, 2014 MCL Yes No .02327 MG/L 0.010 mg/L .01 Archived Sep 30, 2014 -
Apr 1, 2014 Jun 30, 2014 MCL Yes No .01688 MG/L 0.010 mg/L .01 Archived Jun 30, 2014 -
Apr 1, 2014 Jun 30, 2014 MCL Yes No .01688 MG/L 0.010 mg/L .01 Archived Jun 30, 2014 -
Jan 1, 2014 Mar 31, 2014 MCL Yes No .032 MG/L 0.010 mg/L .01 Archived Mar 31, 2014 -
Jan 1, 2014 Mar 31, 2014 MCL Yes No .032 MG/L 0.010 mg/L .01 Archived Mar 31, 2014 -
Oct 1, 2013 Dec 31, 2013 MCL Yes No .029 MG/L 0.010 mg/L .01 Archived Dec 31, 2013 -
Oct 1, 2013 Dec 31, 2013 MCL Yes No .029 MG/L 0.010 mg/L .01 Archived Dec 31, 2013 -
Jul 1, 2013 Sep 30, 2013 MCL Yes No .02135 MG/L 0.010 mg/L .01 Archived Sep 30, 2013 -
Jul 1, 2013 Sep 30, 2013 MCL Yes No .02135 MG/L 0.010 mg/L .01 Archived Sep 30, 2013 -
Jul 1, 2013 - Other No No - - - Resolved Nov 6, 2013 -
Jul 1, 2013 - Other No No - - - Resolved Nov 6, 2013 -
Apr 1, 2013 Jun 30, 2013 MCL Yes No .02825 MG/L 0.010 mg/L .01 Archived Jun 30, 2013 -
Apr 1, 2013 Jun 30, 2013 MCL Yes No .02825 MG/L 0.010 mg/L .01 Archived Jun 30, 2013 -
Jan 1, 2013 Mar 31, 2013 MCL Yes No .03175 MG/L 0.010 mg/L .01 Archived Mar 31, 2013 -
Jan 1, 2013 Mar 31, 2013 MCL Yes No .03175 MG/L 0.010 mg/L .01 Archived Mar 31, 2013 -
Oct 10, 2012 Dec 31, 2012 MCL Yes No .03175 MG/L 0.010 mg/L .01 Archived Dec 31, 2012 -
Oct 10, 2012 Dec 31, 2012 MCL Yes No .03175 MG/L 0.010 mg/L .01 Archived Dec 31, 2012 -
Jul 1, 2012 Sep 30, 2012 MCL Yes No .03475 MG/L 0.010 mg/L .01 Archived Sep 30, 2012 -
Jul 1, 2012 Sep 30, 2012 MCL Yes No .03475 MG/L 0.010 mg/L .01 Archived Sep 30, 2012 -
Apr 1, 2012 Jun 30, 2012 MCL Yes No .03575 MG/L 0.010 mg/L .01 Archived Jun 30, 2012 -
Apr 1, 2012 Jun 30, 2012 MCL Yes No .03575 MG/L 0.010 mg/L .01 Archived Jun 30, 2012 -
Jan 1, 2012 Mar 31, 2012 MCL Yes No .03775 MG/L 0.010 mg/L .01 Archived Mar 31, 2012 -
Jan 1, 2012 Mar 31, 2012 MCL Yes No .03775 MG/L 0.010 mg/L .01 Archived Mar 31, 2012 -

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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