Public Water Partners

EL MONTE, CA · Los Angeles County

HEMLOCK MUTUAL WATER CO. Water System

Consumer Confidence Report status

HEMLOCK MUTUAL WATER CO. must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for HEMLOCK MUTUAL WATER CO..

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)

HEMLOCK MUTUAL WATER CO. is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 686 people from groundwater.

As of August 1, 2026, its federal record holds 26 entries between 2004 and 2024, all of which EPA lists as closed.

Of the 26, 23 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Stage 1 Disinfectants and Disinfection Byproducts Rule, the Public Notice Rule and Revised PN Rule, and the Total Coliform Rules.

Violation history

  • Public Notification Violation without NPDWR Violation

    —

    Public Notice

    January 1, 2024 – August 8, 2025

    Resolved

  • Public Notification Violation without NPDWR Violation

    —

    Public Notice

    October 1, 2023 – August 8, 2025

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    October 1, 2012 – October 31, 2012

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    June 1, 2010 – June 30, 2010

    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

  • Monitoring and Reporting (DBP)

    —

    Chlorine

    January 1, 2009 – March 31, 2009

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Chlorine

    October 1, 2008 – December 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

    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

    January 1, 2004 – March 31, 2004

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

Common questions

Is HEMLOCK MUTUAL WATER CO. required to publish a Consumer Confidence Report?

Yes. HEMLOCK MUTUAL WATER CO. is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is HEMLOCK MUTUAL WATER CO.’s next Consumer Confidence Report due?

HEMLOCK MUTUAL WATER CO.’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does HEMLOCK MUTUAL WATER CO. have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for HEMLOCK MUTUAL WATER CO..

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

SIMS, CARLOS

626-485-8889

EL MONTE, CA 91732