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MANTECA, CITY OF

California — Community Water System — PWSID: CA3910005

System Information

PWSIDCA3910005
System NameMANTECA, CITY OF
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedMar 22, 1979
Last ReportedNov 17, 2025

Location & Contact

StateCalifornia
CityMANTECA
ZIP Code95337
Address1001 W Center St.
OrganizationMONTROSS, GEORGE
Phone209-456-8468

Population & Service

Population Served84,928
Service Connections27,552

Drinking Water Violations (72)

This water system has 72 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, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2024 Nitrate Rule
Jul 1, 2013 Sep 30, 2013 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2013 Arsenic Rule
Jul 1, 2013 Sep 30, 2013 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2013 Arsenic Rule
Apr 1, 2013 Jun 30, 2013 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L .01 Resolved Jun 30, 2013 Arsenic Rule
Apr 1, 2013 Jun 30, 2013 Arsenic MCL Yes No .0115 MG/L 0.010 mg/L .01 Resolved Jun 30, 2013 Arsenic Rule
Jan 1, 2013 Mar 31, 2013 Arsenic MCL Yes No .0118 MG/L 0.010 mg/L .01 Resolved Mar 31, 2013 Arsenic Rule
Jan 1, 2013 Mar 31, 2013 Arsenic MCL Yes No .0118 MG/L 0.010 mg/L .01 Resolved Mar 31, 2013 Arsenic Rule
Oct 1, 2012 Dec 31, 2012 Arsenic MCL Yes No .0121 MG/L 0.010 mg/L .01 Resolved Dec 31, 2012 Arsenic Rule
Oct 1, 2012 Dec 31, 2012 Arsenic MCL Yes No .0121 MG/L 0.010 mg/L .01 Resolved Dec 31, 2012 Arsenic Rule
Jul 1, 2012 Sep 30, 2012 Arsenic MCL Yes No .0128 MG/L 0.010 mg/L .01 Resolved Sep 30, 2012 Arsenic Rule
Jul 1, 2012 Sep 30, 2012 Arsenic MCL Yes No .0128 MG/L 0.010 mg/L .01 Resolved Sep 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .0139 MG/L 0.010 mg/L .01 Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .0139 MG/L 0.010 mg/L .01 Resolved Jun 30, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .0136 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .0136 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .0178 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .0178 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .0179 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .0179 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Apr 1, 2011 Jun 30, 2011 Arsenic MCL Yes No .0175 MG/L 0.010 mg/L .01 Resolved Jun 30, 2011 Arsenic Rule
Jan 1, 2011 Mar 31, 2011 Arsenic MCL Yes No .018 MG/L 0.010 mg/L .01 Resolved Mar 31, 2011 Arsenic Rule
Oct 1, 2010 Dec 31, 2010 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2010 Arsenic Rule
Oct 1, 2010 Dec 31, 2010 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2010 Arsenic Rule
Jul 1, 2010 Sep 30, 2010 Arsenic MCL Yes No .0199 MG/L 0.010 mg/L .01 Resolved Sep 30, 2010 Arsenic Rule
Jul 1, 2010 Sep 30, 2010 Arsenic MCL Yes No .0199 MG/L 0.010 mg/L .01 Resolved Sep 30, 2010 Arsenic Rule
Apr 1, 2010 Jun 30, 2010 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Jun 30, 2010 Arsenic Rule
Jan 1, 2010 Mar 31, 2010 Arsenic MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2010 Arsenic Rule
Jan 1, 2010 Mar 31, 2010 Arsenic MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2010 Arsenic Rule
Oct 1, 2009 Dec 31, 2009 Arsenic MCL Yes No .0133 MG/L 0.010 mg/L .01 Resolved Dec 31, 2009 Arsenic Rule
Oct 1, 2009 Dec 31, 2009 Arsenic MCL Yes No .0133 MG/L 0.010 mg/L .01 Resolved Dec 31, 2009 Arsenic Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .0188 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .0188 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Apr 1, 2009 Jun 30, 2009 Arsenic MCL Yes No .0206 MG/L 0.010 mg/L .01 Resolved Jun 30, 2009 Arsenic Rule
Apr 1, 2009 Jun 30, 2009 Arsenic MCL Yes No .0206 MG/L 0.010 mg/L .01 Resolved Jun 30, 2009 Arsenic Rule
Jan 1, 2009 Mar 31, 2009 Arsenic MCL Yes No .0203 MG/L 0.010 mg/L .01 Resolved Mar 31, 2009 Arsenic Rule
Jan 1, 2009 Mar 31, 2009 Arsenic MCL Yes No .0203 MG/L 0.010 mg/L .01 Resolved Mar 31, 2009 Arsenic Rule
Oct 1, 2008 Dec 31, 2008 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Dec 31, 2008 Arsenic Rule
Oct 1, 2008 Dec 31, 2008 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Dec 31, 2008 Arsenic Rule
Jul 1, 2008 Sep 30, 2008 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Sep 30, 2008 Arsenic Rule
Jul 1, 2008 Sep 30, 2008 Arsenic MCL Yes No .021 MG/L 0.010 mg/L .01 Resolved Sep 30, 2008 Arsenic Rule
Apr 1, 2008 Jun 30, 2008 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Jun 30, 2008 Arsenic Rule
Apr 1, 2008 Jun 30, 2008 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Jun 30, 2008 Arsenic Rule
Jan 1, 2008 Mar 31, 2008 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2008 Arsenic Rule
Jan 1, 2008 Mar 31, 2008 Arsenic MCL Yes No .02 MG/L 0.010 mg/L .01 Resolved Mar 31, 2008 Arsenic Rule
Oct 1, 2007 Dec 31, 2007 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2007 Arsenic Rule
Oct 1, 2007 Dec 31, 2007 Arsenic MCL Yes No .019 MG/L 0.010 mg/L .01 Resolved Dec 31, 2007 Arsenic Rule
Jul 1, 2007 Sep 30, 2007 Arsenic MCL Yes No .018 MG/L 0.010 mg/L .01 Resolved Sep 30, 2007 Arsenic Rule
Jul 1, 2007 Sep 30, 2007 Arsenic MCL Yes No .018 MG/L 0.010 mg/L .01 Resolved Sep 30, 2007 Arsenic Rule
Apr 1, 2007 Jun 30, 2007 Arsenic MCL Yes No .18 MG/L 0.010 mg/L .01 Resolved Jun 30, 2007 Arsenic 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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