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ADELANTO, CITY OF

California — Community Water System — PWSID: CA3610001

System Information

PWSIDCA3610001
System NameADELANTO, CITY OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerYes
First ReportedMar 22, 1979
Last ReportedNov 17, 2025

Location & Contact

StateCalifornia
CityADELANTO
ZIP Code92301
Address11600 Air expressway
OrganizationRAMOS, IRIS
Phone661-651-0243

Population & Service

Population Served39,930
Service Connections8,318

Drinking Water Violations (38)

This water system has 38 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 — Archived Dec 31, 2024 Nitrate Rule
Jan 1, 2018 Dec 31, 2018 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2018 Nitrate Rule
Jan 1, 2018 Dec 31, 2018 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2018 Nitrate Rule
Jan 1, 2018 Dec 31, 2018 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2018 Nitrate Rule
Jan 1, 2018 Dec 31, 2018 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2018 Nitrate Rule
Jan 1, 2018 Dec 31, 2018 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2018 Nitrate Rule
Jan 1, 2018 Dec 31, 2018 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2018 Nitrate Rule
Jan 1, 2015 Dec 31, 2015 Nitrate MR No No — 10 mg/L — Resolved Dec 31, 2015 Nitrate Rule
Jan 1, 2015 Dec 31, 2015 Nitrate MR No No — 10 mg/L — Resolved Dec 31, 2015 Nitrate Rule
Jun 1, 2014 — E. COLI MR No Yes — — — Resolved Jul 31, 2014 Ground Water Rule
Jun 1, 2014 — E. COLI MR No Yes — — — Resolved Jul 31, 2014 Ground Water Rule
Jan 1, 2014 Dec 31, 2014 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jan 1, 2014 Dec 31, 2014 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jan 1, 2013 Dec 31, 2013 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2013 Nitrate Rule
Jan 1, 2013 Dec 31, 2013 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2013 Nitrate Rule
Sep 1, 2011 Sep 30, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2011 Total Coliform Rule
Apr 1, 2011 Jun 30, 2011 Arsenic MCL Yes No .03 MG/L 0.010 mg/L .01 Resolved Jun 30, 2011 Arsenic Rule
Apr 1, 2011 Jun 30, 2011 Arsenic MCL Yes No .03 MG/L 0.010 mg/L .01 Resolved Jun 30, 2011 Arsenic Rule
Jan 1, 2011 Mar 31, 2011 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Mar 31, 2011 Arsenic Rule
Jan 1, 2011 Mar 31, 2011 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Mar 31, 2011 Arsenic Rule
Oct 1, 2010 Dec 31, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Dec 31, 2010 Arsenic Rule
Oct 1, 2010 Dec 31, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Dec 31, 2010 Arsenic Rule
Jul 1, 2010 Sep 30, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Sep 30, 2010 Arsenic Rule
Jul 1, 2010 Sep 30, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Sep 30, 2010 Arsenic Rule
Apr 1, 2010 Jun 30, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Jun 30, 2010 Arsenic Rule
Apr 1, 2010 Jun 30, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Jun 30, 2010 Arsenic Rule
Jan 1, 2010 Mar 31, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Mar 31, 2010 Arsenic Rule
Jan 1, 2010 Mar 31, 2010 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Mar 31, 2010 Arsenic Rule
Oct 1, 2009 Dec 31, 2009 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Dec 31, 2009 Arsenic Rule
Oct 1, 2009 Dec 31, 2009 Arsenic MCL Yes No .032 MG/L 0.010 mg/L .01 Resolved Dec 31, 2009 Arsenic Rule
Jul 1, 2003 Jul 31, 2003 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 2003 Total Coliform Rule
Jul 1, 2003 Jul 31, 2003 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 2003 Total Coliform Rule
Mar 3, 1994 Apr 28, 1995 Fluoride MCL Yes No 2.5 MG/L 4.0 mg/L 1.2 Archived Apr 28, 1995 Inorganic Chemicals
Oct 1, 1992 Oct 31, 1992 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 1992 Total Coliform Rule
Oct 1, 1992 Oct 31, 1992 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 1992 Total Coliform Rule
Aug 1, 1988 Aug 31, 1988 Fluoride MCL Yes No — 4.0 mg/L — Archived Aug 31, 1988 Inorganic Chemicals
— — — No No — — — — — —
— — — No No — — — — — —

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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