CITY OF MORGAN HILL

California — Community Water System — PWSID: CA4310006

System Information

PWSID	CA4310006
System Name	CITY OF MORGAN HILL
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	MORGANN HILL
ZIP Code	95037
Address	100 Edes Ct
Organization	SYLVAIN, JAMES
Phone	408-310-4166

Population & Service

Population Served	47,374
Service Connections	15,003

Drinking Water Violations (255)

This water system has 255 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
Nov 1, 1999	Nov 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1999	Total Coliform Rule
Nov 1, 1999	Nov 30, 1999	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 1999	Total Coliform Rule
Aug 1, 1993	Aug 31, 1993	Nitrate	MCL	Yes	No	50 MG/L	10 mg/L	45	Resolved	Aug 31, 1993	Nitrate Rule
Aug 1, 1993	Aug 31, 1993	Nitrate	MCL	Yes	No	50 MG/L	10 mg/L	45	Resolved	Aug 31, 1993	Nitrate Rule
Aug 1, 1993	Aug 31, 1993	Nitrate	MCL	Yes	No	50 MG/L	10 mg/L	45	Resolved	Aug 31, 1993	Nitrate Rule
Aug 1, 1993	Aug 31, 1993	Nitrate	MCL	Yes	No	50 MG/L	10 mg/L	45	Resolved	Aug 31, 1993	Nitrate Rule
Aug 1, 1993	Aug 31, 1993	Nitrate	MCL	Yes	No	50 MG/L	10 mg/L	45	Resolved	Aug 31, 1993	Nitrate Rule
Jul 1, 1988	Jul 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jul 31, 1988	Nitrate Rule
Jun 1, 1988	Jun 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jun 30, 1988	Nitrate Rule
Jun 1, 1988	Jun 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jun 30, 1988	Nitrate Rule
Jun 1, 1988	Jun 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jun 30, 1988	Nitrate Rule
Jun 1, 1988	Jun 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jun 30, 1988	Nitrate Rule
Jun 1, 1988	Jun 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jun 30, 1988	Nitrate Rule
Jun 1, 1988	Jun 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jun 30, 1988	Nitrate Rule
May 1, 1988	May 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	May 31, 1988	Nitrate Rule
May 1, 1988	May 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	May 31, 1988	Nitrate Rule
May 1, 1988	May 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	May 31, 1988	Nitrate Rule
May 1, 1988	May 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	May 31, 1988	Nitrate Rule
May 1, 1988	May 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	May 31, 1988	Nitrate Rule
May 1, 1988	May 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	May 31, 1988	Nitrate Rule
Apr 1, 1988	Apr 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Apr 30, 1988	Nitrate Rule
Apr 1, 1988	Apr 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Apr 30, 1988	Nitrate Rule
Apr 1, 1988	Apr 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Apr 30, 1988	Nitrate Rule
Apr 1, 1988	Apr 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Apr 30, 1988	Nitrate Rule
Apr 1, 1988	Apr 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Apr 30, 1988	Nitrate Rule
Apr 1, 1988	Apr 30, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Apr 30, 1988	Nitrate Rule
Mar 1, 1988	Mar 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Mar 31, 1988	Nitrate Rule
Mar 1, 1988	Mar 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Mar 31, 1988	Nitrate Rule
Mar 1, 1988	Mar 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Mar 31, 1988	Nitrate Rule
Mar 1, 1988	Mar 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Mar 31, 1988	Nitrate Rule
Mar 1, 1988	Mar 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Mar 31, 1988	Nitrate Rule
Mar 1, 1988	Mar 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Mar 31, 1988	Nitrate Rule
Feb 1, 1988	Feb 29, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Feb 29, 1988	Nitrate Rule
Feb 1, 1988	Feb 29, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Feb 29, 1988	Nitrate Rule
Feb 1, 1988	Feb 29, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Feb 29, 1988	Nitrate Rule
Feb 1, 1988	Feb 29, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Feb 29, 1988	Nitrate Rule
Feb 1, 1988	Feb 29, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Feb 29, 1988	Nitrate Rule
Feb 1, 1988	Feb 29, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Feb 29, 1988	Nitrate Rule
Jan 1, 1988	Jan 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jan 31, 1988	Nitrate Rule
Jan 1, 1988	Jan 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jan 31, 1988	Nitrate Rule
Jan 1, 1988	Jan 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jan 31, 1988	Nitrate Rule
Jan 1, 1988	Jan 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jan 31, 1988	Nitrate Rule
Jan 1, 1988	Jan 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jan 31, 1988	Nitrate Rule
Jan 1, 1988	Jan 31, 1988	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Jan 31, 1988	Nitrate Rule
Dec 1, 1987	Dec 31, 1987	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Dec 31, 1987	Nitrate Rule
Dec 1, 1987	Dec 31, 1987	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Dec 31, 1987	Nitrate Rule
Dec 1, 1987	Dec 31, 1987	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Dec 31, 1987	Nitrate Rule
Dec 1, 1987	Dec 31, 1987	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Dec 31, 1987	Nitrate Rule
Dec 1, 1987	Dec 31, 1987	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Dec 31, 1987	Nitrate Rule
Dec 1, 1987	Dec 31, 1987	Nitrate	MCL	Yes	No	—	10 mg/L	—	Archived	Dec 31, 1987	Nitrate 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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