OROSI HIGH SCHOOL

California — Non-Transient Non-Community — PWSID: CA5400636

System Information

PWSID	CA5400636
System Name	OROSI HIGH SCHOOL
System Type	Non-Transient Non-Community
Water Source	Ground Water
Activity Status	Non-Inventory
Owner Type	Local
EPA Region	09
Serves School	Yes
Wholesaler	No
First Reported	Jan 27, 1983
Last Reported	Nov 17, 2025

Location & Contact

State	California
City	OROSI
ZIP Code	93647
Address	12623 AVE 416
Organization	SOGHOMONIAN, RAFFI
Phone	559-528-4763

Population & Service

Population Served	1,200
Service Connections	8

Drinking Water Violations (99)

This water system has 99 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, 2022	Mar 31, 2022	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Mar 31, 2022	Nitrate Rule
Jan 1, 2022	Mar 31, 2022	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Mar 31, 2022	Nitrate Rule
Oct 1, 2021	Dec 31, 2021	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	10	Resolved	Dec 31, 2021	Nitrate Rule
Oct 1, 2021	Dec 31, 2021	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	10	Resolved	Dec 31, 2021	Nitrate Rule
Jul 1, 2021	Sep 30, 2021	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Sep 30, 2021	Nitrate Rule
Jul 1, 2021	Sep 30, 2021	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Sep 30, 2021	Nitrate Rule
Jul 1, 2021	Sep 30, 2021	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Sep 30, 2021	Nitrate Rule
Apr 1, 2021	Jun 30, 2021	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	10	Resolved	Jun 30, 2021	Nitrate Rule
Apr 1, 2021	Jun 30, 2021	Nitrate	MCL	Yes	No	12 MG/L	10 mg/L	10	Resolved	Jun 30, 2021	Nitrate Rule
Apr 1, 2021	Apr 30, 2021	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Apr 30, 2021	Revised Total Coliform Rule
Apr 1, 2021	Apr 30, 2021	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Apr 30, 2021	Revised Total Coliform Rule
Jan 1, 2021	Mar 31, 2021	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Mar 31, 2021	Nitrate Rule
Jan 1, 2021	Mar 31, 2021	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Mar 31, 2021	Nitrate Rule
Oct 1, 2020	Dec 31, 2020	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Dec 31, 2020	Nitrate Rule
Oct 1, 2020	Dec 31, 2020	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Dec 31, 2020	Nitrate Rule
Jul 1, 2020	Sep 30, 2020	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Sep 30, 2020	Nitrate Rule
Jul 1, 2020	Sep 30, 2020	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Sep 30, 2020	Nitrate Rule
Jan 1, 2020	Mar 31, 2020	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Mar 31, 2020	Nitrate Rule
Jan 1, 2020	Mar 31, 2020	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Mar 31, 2020	Nitrate Rule
Apr 1, 2019	Jun 30, 2019	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Jun 30, 2019	Nitrate Rule
Apr 1, 2019	Jun 30, 2019	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Jun 30, 2019	Nitrate Rule
Jul 1, 2018	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Nov 7, 2018	Consumer Confidence Rule
Jul 1, 2018	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Nov 7, 2018	Consumer Confidence Rule
Apr 1, 2018	Jun 30, 2018	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Jun 30, 2018	Nitrate Rule
Apr 1, 2018	Jun 30, 2018	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Jun 30, 2018	Nitrate Rule
Jan 1, 2018	Mar 31, 2018	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 2018	Nitrate Rule
Jan 1, 2018	Mar 31, 2018	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 2018	Nitrate Rule
Jan 1, 2018	Mar 31, 2018	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 2018	Nitrate Rule
Jan 1, 2018	Mar 31, 2018	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Mar 31, 2018	Nitrate Rule
Oct 1, 2017	Dec 31, 2017	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Dec 31, 2017	Nitrate Rule
Oct 1, 2017	Dec 31, 2017	Nitrate	MCL	Yes	No	11 MG/L	10 mg/L	10	Resolved	Dec 31, 2017	Nitrate Rule
Jan 1, 2016	Dec 31, 2016	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2016	Nitrate Rule
Jan 1, 2016	Dec 31, 2016	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2016	Nitrate Rule
Jan 1, 2016	Dec 31, 2016	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2016	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
Jan 1, 2015	Dec 31, 2015	Nitrate	MR	No	No	—	10 mg/L	—	Resolved	Dec 31, 2015	Nitrate Rule
Nov 1, 2013	Nov 30, 2013	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2013	Total Coliform Rule
Nov 1, 2013	Nov 30, 2013	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2013	Total Coliform Rule
Jul 1, 2012	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Sep 28, 2012	Consumer Confidence Rule
Jul 1, 2012	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Sep 28, 2012	Consumer Confidence Rule
Oct 1, 2011	Oct 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2011	Total Coliform Rule
Oct 1, 2011	Oct 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 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
May 1, 2011	May 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Feb 1, 2008	Feb 29, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 29, 2008	Total Coliform Rule
Feb 1, 2008	Feb 29, 2008	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 29, 2008	Total Coliform Rule
Jan 1, 2008	Dec 31, 2008	Nitrate	MCL	Yes	No	90.1 MG/L	10 mg/L	45	Resolved	Dec 31, 2008	Nitrate Rule
Jan 1, 2008	Dec 31, 2008	Nitrate	MCL	Yes	No	90.1 MG/L	10 mg/L	45	Resolved	Dec 31, 2008	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.

Browse All Water Systems Water Safety Stats Water Safety Home

Browse All Water Systems Water Systems in California