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CITY OF LATHROP

California — Community Water System — PWSID: CA3910015

System Information

PWSIDCA3910015
System NameCITY OF LATHROP
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
CityLATHROP
ZIP Code95330
Address390 Towne Centre Drive
OrganizationKING, MICHAEL
Phone209-941-7454

Population & Service

Population Served35,080
Service Connections11,185

Drinking Water Violations (120)

This water system has 120 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
Jul 1, 2018 Sep 30, 2018 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 Combined Uranium MCL Yes No 29.3 PCI/L 30 ug/L 20 Resolved Jun 30, 2014 Radionuclides and Revised Rad Rule
Apr 1, 2014 Jun 30, 2014 Combined Uranium MCL Yes No 29.3 PCI/L 30 ug/L 20 Resolved Jun 30, 2014 Radionuclides and Revised Rad Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Apr 1, 2014 Jun 30, 2014 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 Arsenic Rule
Jan 1, 2014 Mar 31, 2014 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Mar 31, 2014 Arsenic Rule
Jan 1, 2014 Mar 31, 2014 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Mar 31, 2014 Arsenic Rule
Jan 1, 2014 Mar 31, 2014 Combined Uranium MCL Yes No 29.3 PCI/L 30 ug/L 20 Resolved Mar 31, 2014 Radionuclides and Revised Rad Rule
Jan 1, 2014 Mar 31, 2014 Combined Uranium MCL Yes No 29.3 PCI/L 30 ug/L 20 Resolved Mar 31, 2014 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Combined Uranium MCL Yes No 29.13 PCI/L 30 ug/L 20 Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Combined Uranium MCL Yes No 29.13 PCI/L 30 ug/L 20 Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Oct 1, 2013 Dec 31, 2013 Arsenic MCL Yes No .01185 MG/L 0.010 mg/L .01 Resolved Dec 31, 2013 Arsenic Rule
Oct 1, 2013 Dec 31, 2013 Arsenic MCL Yes No .01185 MG/L 0.010 mg/L .01 Resolved Dec 31, 2013 Arsenic Rule
Jul 1, 2013 Sep 30, 2013 Combined Uranium MCL Yes No 29.96 PCI/L 30 ug/L 20 Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Combined Uranium MCL Yes No 29.96 PCI/L 30 ug/L 20 Resolved Sep 30, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2013 Sep 30, 2013 Arsenic MCL Yes No .01343 MG/L 0.010 mg/L .01 Resolved Sep 30, 2013 Arsenic Rule
Jul 1, 2013 Sep 30, 2013 Arsenic MCL Yes No .01343 MG/L 0.010 mg/L .01 Resolved Sep 30, 2013 Arsenic Rule
Apr 1, 2013 Jun 30, 2013 Combined Uranium MCL Yes No 22.88 PCI/L 30 ug/L 20 Resolved Jun 30, 2013 Radionuclides and Revised Rad Rule
Apr 1, 2013 Jun 30, 2013 Combined Uranium MCL Yes No 22.88 PCI/L 30 ug/L 20 Resolved Jun 30, 2013 Radionuclides and Revised Rad Rule
Apr 1, 2013 Jun 30, 2013 Arsenic MCL Yes No .01425 MG/L 0.010 mg/L .01 Resolved Jun 30, 2013 Arsenic Rule
Apr 1, 2013 Jun 30, 2013 Arsenic MCL Yes No .01425 MG/L 0.010 mg/L .01 Resolved Jun 30, 2013 Arsenic Rule
Jan 1, 2013 Mar 31, 2013 Combined Uranium MCL Yes No 20.7 PCI/L 30 ug/L 20 Resolved Mar 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2013 Mar 31, 2013 Combined Uranium MCL Yes No 20.7 PCI/L 30 ug/L 20 Resolved Mar 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2013 Mar 31, 2013 Arsenic MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2013 Arsenic Rule
Jan 1, 2013 Mar 31, 2013 Arsenic MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2013 Arsenic Rule
Oct 1, 2012 Dec 31, 2012 Arsenic MCL Yes No .01275 MG/L 0.010 mg/L .01 Resolved Dec 31, 2012 Arsenic Rule
Oct 1, 2012 Dec 31, 2012 Arsenic MCL Yes No .01275 MG/L 0.010 mg/L .01 Resolved Dec 31, 2012 Arsenic Rule
Jul 1, 2012 Sep 30, 2012 Combined Uranium MCL Yes No 20.69 PCI/L 30 ug/L 20 Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Combined Uranium MCL Yes No 20.69 PCI/L 30 ug/L 20 Resolved Sep 30, 2012 Radionuclides and Revised Rad Rule
Jul 1, 2012 Sep 30, 2012 Arsenic MCL Yes No .01175 MG/L 0.010 mg/L .01 Resolved Sep 30, 2012 Arsenic Rule
Jul 1, 2012 Sep 30, 2012 Arsenic MCL Yes No .01175 MG/L 0.010 mg/L .01 Resolved Sep 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .0187 MG/L 0.010 mg/L .01 Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .0187 MG/L 0.010 mg/L .01 Resolved Jun 30, 2012 Arsenic Rule
Apr 1, 2012 Jun 30, 2012 Arsenic MCL Yes No .0187 MG/L 0.010 mg/L .01 Resolved Jun 30, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .01875 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .01875 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Jan 1, 2012 Mar 31, 2012 Arsenic MCL Yes No .01875 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .0187 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .0187 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Oct 1, 2011 Dec 31, 2011 Arsenic MCL Yes No .0187 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .0186 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .0186 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Jul 1, 2011 Sep 30, 2011 Arsenic MCL Yes No .0186 MG/L 0.010 mg/L .01 Resolved Sep 30, 2011 Arsenic Rule
Apr 1, 2011 Jun 30, 2011 Arsenic MCL Yes No .0186 MG/L 0.010 mg/L .01 Resolved Jun 30, 2011 Arsenic Rule
Apr 1, 2011 Jun 30, 2011 Arsenic MCL Yes No .0186 MG/L 0.010 mg/L .01 Resolved Jun 30, 2011 Arsenic Rule
Apr 1, 2011 Jun 30, 2011 Arsenic MCL Yes No .0186 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

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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