LOST HILLS UTILITY DISTRICT

California — Community Water System — PWSID: CA1510046

System Information

PWSID	CA1510046
System Name	LOST HILLS UTILITY DISTRICT
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Private
EPA Region	09
Serves School	No
Wholesaler	No
First Reported	Jan 25, 1983
Last Reported	Nov 17, 2025

Location & Contact

State	California
City	LOST HILLS
ZIP Code	93249
Address	P. O. BOX 246
Organization	CHAVEZ, ANA
Phone	661-797-2903

Population & Service

Population Served	2,370
Service Connections	450

Drinking Water Violations (50)

This water system has 50 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, 2023	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jul 3, 2024	Lead and Copper Rule
Oct 1, 2023	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jul 3, 2024	Lead and Copper Rule
Aug 1, 2015	Aug 31, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 2015	Total Coliform Rule
Aug 1, 2015	Aug 31, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 2015	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
Apr 1, 2011	Apr 30, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Apr 30, 2011	Total Coliform Rule
Apr 1, 2011	Apr 30, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Apr 30, 2011	Total Coliform Rule
Jan 1, 2009	Dec 31, 2009	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Dec 31, 2009	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009	Dec 31, 2009	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Dec 31, 2009	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009	Dec 31, 2009	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Dec 31, 2009	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009	Dec 31, 2009	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Dec 31, 2009	Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008	Dec 31, 2008	Arsenic	MCL	Yes	No	.043 MG/L	0.010 mg/L	.01	Archived	Dec 31, 2008	Arsenic Rule
Oct 1, 2007	Dec 31, 2007	Arsenic	MCL	Yes	No	.0357 MG/L	0.010 mg/L	.01	Archived	Dec 31, 2007	Arsenic Rule
Aug 1, 2007	Aug 31, 2007	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 2007	Total Coliform Rule
Aug 1, 2007	Aug 31, 2007	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 2007	Total Coliform Rule
Apr 1, 2007	Jun 30, 2007	Arsenic	MCL	Yes	No	.0397 MG/L	0.010 mg/L	.01	Resolved	Jun 30, 2007	Arsenic Rule
Jan 1, 2007	Mar 30, 2007	Arsenic	MCL	Yes	No	.0475 MG/L	0.010 mg/L	.01	Resolved	Mar 30, 2007	Arsenic Rule
Oct 1, 2006	Dec 31, 2006	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Dec 31, 2006	Arsenic Rule
Jul 1, 2006	Sep 30, 2006	Arsenic	MCL	Yes	No	.043 MG/L	0.010 mg/L	.01	Resolved	Sep 30, 2006	Arsenic Rule
Apr 1, 2006	Jun 30, 2006	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2006	Arsenic Rule
Feb 1, 2006	Feb 28, 2006	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 28, 2006	Total Coliform Rule
Feb 1, 2006	Feb 28, 2006	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 28, 2006	Total Coliform Rule
Jan 1, 2005	Dec 31, 2005	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Dec 31, 2005	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2005	Dec 31, 2005	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Dec 31, 2005	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jun 4, 2004	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jun 4, 2004	Lead and Copper Rule
Jan 1, 2004	Dec 31, 2004	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2004	Nitrate Rule
Jan 1, 2004	Dec 31, 2004	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2004	Nitrate Rule
Sep 1, 2002	Sep 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2002	Total Coliform Rule
Sep 1, 2002	Sep 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2002	Total Coliform Rule
Jan 1, 2002	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 22, 2003	Lead and Copper Rule
Jan 1, 2002	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Sep 22, 2003	Lead and Copper Rule
Dec 1, 2001	Dec 31, 2001	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2001	Total Coliform Rule
Dec 1, 2001	Dec 31, 2001	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2001	Total Coliform Rule
Nov 1, 2001	Nov 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2001	Total Coliform Rule
Nov 1, 2001	Nov 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2001	Total Coliform Rule
Nov 1, 2000	Nov 30, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2000	Total Coliform Rule
Nov 1, 2000	Nov 30, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2000	Total Coliform Rule
Jan 1, 2000	Dec 31, 2000	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2000	Nitrate Rule
Jan 1, 2000	Dec 31, 2000	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2000	Nitrate Rule
Jan 1, 1997	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Mar 12, 2018	Lead and Copper Rule
Jan 1, 1997	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Mar 12, 2018	Lead and Copper Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 1994	Total Coliform Rule
May 1, 1994	May 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 1994	Total Coliform Rule
May 1, 1994	May 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 1994	Total Coliform Rule
May 1, 1993	May 31, 1993	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 1993	Total Coliform Rule
Nov 1, 1992	Nov 30, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 1992	Total Coliform Rule
Nov 1, 1992	Nov 30, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 1992	Total Coliform 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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