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GRATTON SCHOOL

California - Non-Transient Non-Community - PWSID: CA5000273

System Information

PWSIDCA5000273
System NameGRATTON SCHOOL
System TypeNon-Transient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolYes
WholesalerNo
First ReportedNov 30, 1981
Last ReportedJun 22, 2026

Location & Contact

StateCalifornia
CityDENAIR
ZIP Code95316
Address4500 S Gratton Road
OrganizationWILLIAMS, WENDY
Phone209-632-0505

Population & Service

Population Served141
Service Connections5

Drinking Water Violations (94)

This water system has 94 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, 2016 Sep 30, 2016 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2016 -
Jul 1, 2016 Sep 30, 2016 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2016 -
Apr 1, 2016 Jun 30, 2016 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2016 -
Apr 1, 2016 Jun 30, 2016 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2016 -
Jan 1, 2016 Mar 31, 2016 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2016 -
Jan 1, 2016 Mar 31, 2016 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2016 -
Oct 1, 2015 Dec 31, 2015 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Dec 31, 2015 -
Oct 1, 2015 Dec 31, 2015 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Dec 31, 2015 -
Jul 1, 2015 Sep 30, 2015 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2015 -
Jul 1, 2015 Sep 30, 2015 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2015 -
May 1, 2015 May 31, 2015 MCL Yes No - 5% of samples - Resolved May 31, 2015 -
May 1, 2015 May 31, 2015 MCL Yes No - 5% of samples - Resolved May 31, 2015 -
Apr 1, 2015 Jun 30, 2015 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Jun 30, 2015 -
Apr 1, 2015 Jun 30, 2015 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Jun 30, 2015 -
Jan 1, 2015 Mar 31, 2015 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 -
Jan 1, 2015 Mar 31, 2015 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Mar 31, 2015 -
Oct 1, 2014 Dec 31, 2014 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 -
Oct 1, 2014 Dec 31, 2014 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Dec 31, 2014 -
Aug 1, 2014 Aug 31, 2014 MCL Yes No - 5% of samples - Resolved Aug 31, 2014 -
Aug 1, 2014 Aug 31, 2014 MCL Yes No - 5% of samples - Resolved Aug 31, 2014 -
Jul 1, 2014 Jul 31, 2014 MR No No - 5% of samples - Resolved Jul 31, 2014 -
Jul 1, 2014 Jul 31, 2014 MR No No - 5% of samples - Resolved Jul 31, 2014 -
Jul 1, 2014 Sep 30, 2014 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 -
Jul 1, 2014 Sep 30, 2014 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2014 -
May 1, 2014 May 31, 2014 MCL Yes No - 5% of samples - Resolved May 31, 2014 -
May 1, 2014 May 31, 2014 MCL Yes No - 5% of samples - Resolved May 31, 2014 -
Apr 1, 2014 Jun 30, 2014 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 -
Apr 1, 2014 Jun 30, 2014 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2014 -
Jan 1, 2014 Mar 31, 2014 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2014 -
Jan 1, 2014 Mar 31, 2014 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Mar 31, 2014 -
Oct 1, 2013 Dec 31, 2013 MCL Yes No .012 MG/L 0.010 mg/L .01 Resolved Dec 31, 2013 -
Oct 1, 2013 Dec 31, 2013 MCL Yes No .012 MG/L 0.010 mg/L .01 Resolved Dec 31, 2013 -
Jul 1, 2013 Sep 30, 2013 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2013 -
Jul 1, 2013 Sep 30, 2013 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Sep 30, 2013 -
Apr 1, 2013 Jun 30, 2013 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2013 -
Apr 1, 2013 Jun 30, 2013 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2013 -
Jan 1, 2013 Mar 31, 2013 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Mar 31, 2013 -
Jan 1, 2013 Mar 31, 2013 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Mar 31, 2013 -
Oct 1, 2012 Dec 31, 2012 MCL Yes No - 5% of samples - Resolved Dec 31, 2012 -
Oct 1, 2012 Dec 31, 2012 MCL Yes No - 5% of samples - Resolved Dec 31, 2012 -
Oct 1, 2012 Dec 31, 2012 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Dec 31, 2012 -
Oct 1, 2012 Dec 31, 2012 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Dec 31, 2012 -
Jul 1, 2012 Sep 30, 2012 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Sep 30, 2012 -
Jul 1, 2012 Sep 30, 2012 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Sep 30, 2012 -
Apr 1, 2012 Jun 30, 2012 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2012 -
Apr 1, 2012 Jun 30, 2012 MCL Yes No .013 MG/L 0.010 mg/L .01 Resolved Jun 30, 2012 -
Jan 1, 2012 Mar 31, 2012 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 -
Jan 1, 2012 Mar 31, 2012 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Mar 31, 2012 -
Oct 1, 2011 Dec 31, 2011 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 -
Oct 1, 2011 Dec 31, 2011 MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Dec 31, 2011 -

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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