EL MONTE, CA · Los Angeles County

HEMLOCK MUTUAL WATER CO. Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.

System facts

System ID (PWSID): CA1910053
System type: Community Water System
Population served: 686
Service connections: 208
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2012 – October 31, 2012
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 1, 2012 – December 10, 2012
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2009 – September 30, 2009
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2009 – June 30, 2009
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 30, 2009 – July 1, 2010
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2008 – October 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2008 – September 30, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2008 – June 30, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2008 – March 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2007 – December 31, 2007
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2007 – September 30, 2007
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2007 – June 30, 2007
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2007 – March 31, 2007
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2006 – September 30, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2006 – June 30, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2006 – March 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2005 – September 30, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2005 – June 30, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2005 – March 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2004 – December 31, 2004
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2004 – September 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2004 – June 30, 2004
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2012 – October 31, 2012	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2012 – December 10, 2012	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2009 – September 30, 2009	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 30, 2009 – July 1, 2010	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
October 1, 2008 – October 31, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2008 – September 30, 2008	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2008 – March 31, 2008	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2007 – December 31, 2007	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2007 – September 30, 2007	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2007 – June 30, 2007	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2007 – March 31, 2007	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2006 – June 30, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2004 – December 31, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2004 – September 30, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2004 – June 30, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

August 8, 2025State Compliance achieved5 linked violations
December 17, 2024State Administrative/Compliance Order without penalty issued8 linked violations
December 30, 2012State Compliance achieved3 linked violations
July 30, 2010State Violation/Reminder Notice1 linked violation
July 30, 2010State Public Notification requested1 linked violation
July 30, 2010State Compliance achieved1 linked violation
July 30, 2010State Compliance achieved1 linked violation
July 1, 2010State Violation/Reminder Notice24 linked violations
July 1, 2010State Violation/Reminder Notice1 linked violation
July 1, 2010State Compliance achieved8 linked violations
July 1, 2010State Violation/Reminder Notice1 linked violation
June 20, 2002State Compliance achieved1 linked violation
January 10, 2000State Violation/Reminder Notice5 linked violations

Contact

BECERRA, BLANCA ESTELLA

626-422-3516

EL MONTE, CA 91732