SAN JOAQUIN, CITY OF

California — Community Water System — PWSID: CA1010034

System Information

PWSID	CA1010034
System Name	SAN JOAQUIN, CITY OF
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	09
Serves School	No
Wholesaler	No
First Reported	Mar 22, 1979
Last Reported	Nov 17, 2025

Location & Contact

State	California
City	SAN JOAQUIN
ZIP Code	93660
Address	P.O. Box 758
Organization	BULLA, STAN
Phone	559-693-4311

Population & Service

Population Served	4,060
Service Connections	754

Drinking Water Violations (39)

This water system has 39 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
Sep 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Sep 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Sep 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jun 1, 2005	Jun 30, 2005	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2005	Total Coliform Rule
Jun 1, 2005	Jun 30, 2005	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2005	Total Coliform Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jul 1, 2004	Jul 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jul 31, 2004	Total Coliform Rule
Jul 1, 2004	Jul 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jul 31, 2004	Total Coliform Rule
Mar 1, 2004	Mar 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 2004	Total Coliform Rule
Mar 1, 2004	Mar 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 2004	Total Coliform Rule
Jan 1, 2004	Dec 31, 2004	TTHM	MR	No	Yes	—	0.080 mg/L	—	Resolved	Dec 31, 2004	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2004	Dec 31, 2004	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Dec 31, 2004	Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2003	Apr 30, 2003	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Apr 30, 2003	Total Coliform Rule
Apr 1, 2003	Apr 30, 2003	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Apr 30, 2003	Total Coliform Rule
Jan 1, 2003	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jun 4, 2004	Lead and Copper Rule
Jan 1, 2003	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jun 4, 2004	Lead and Copper Rule
Jun 1, 2001	Jun 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2001	Total Coliform Rule
Jun 1, 2001	Jun 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2001	Total Coliform Rule
May 1, 2000	May 31, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2000	Total Coliform Rule
May 1, 2000	May 31, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 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	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jun 4, 2004	Lead and Copper Rule
Jan 1, 2000	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jun 4, 2004	Lead and Copper Rule
Jan 1, 2000	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jun 4, 2004	Lead and Copper Rule
Jan 1, 2000	Dec 31, 2000	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2000	Nitrate Rule
Jun 1, 1998	Jun 30, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 1998	Total Coliform Rule
Jun 1, 1998	Jun 30, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 1998	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Sep 1, 1994	Sep 30, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 1994	Total Coliform Rule
Nov 1, 1993	Dec 31, 1993	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 1993	Total Coliform Rule
Nov 1, 1993	Dec 31, 1993	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 1993	Total Coliform Rule
Nov 1, 1992	Dec 31, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 1992	Total Coliform Rule
Nov 1, 1992	Dec 31, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 1992	Total Coliform Rule
Oct 1, 1992	Nov 30, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 1992	Total Coliform Rule
Oct 1, 1992	Nov 30, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 1992	Total Coliform Rule
Aug 1, 1992	Aug 31, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 1992	Total Coliform Rule
Aug 1, 1992	Aug 31, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 1992	Total Coliform Rule
Dec 1, 1989	Dec 31, 1989		Other	No	No	—	—	—	Archived	Dec 31, 1989	Miscellaneous Other Rules

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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