Is LAS CUMBRES MUTUAL WATER CO required to publish a Consumer Confidence Report?

Yes. LAS CUMBRES 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 LAS CUMBRES MUTUAL WATER CO’s next Consumer Confidence Report due?

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

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.

LOS GATOS, CA · Santa Cruz County

LAS CUMBRES MUTUAL WATER CO Water System

Consumer Confidence Report status

LAS CUMBRES 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 LAS CUMBRES 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): CA4400631
System type: Community Water System
Population served: 402
Service connections: 125
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

LAS CUMBRES MUTUAL WATER CO is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 402 people from surface water.

As of August 1, 2026, its federal record holds 46 entries between 1981 and 2018, all of which EPA lists as closed. Nothing has been added since 2018.

Of the 46, 5 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 Surface Water Treatment Rules, the Miscellaneous Other Rules, and the Total Coliform Rules.

Violation history

Monitoring, Source Water (LT2)
—
E. COLI
May 1, 2018 – May 31, 2018
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
April 1, 2018 – April 30, 2018
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
March 1, 2018 – March 31, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 2016 – November 30, 2016
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
November 1, 2016 – February 7, 2018
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
October 1, 2016 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2016 – September 30, 2016
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
August 1, 2016 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2016 – July 31, 2016
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
June 1, 2016 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 2016 – June 30, 2016
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2016 – May 31, 2016
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 2016 – April 30, 2016
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
April 1, 2016 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 2016 – March 31, 2016
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
February 1, 2016 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2016 – February 29, 2016
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
January 1, 2016 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2016 – January 31, 2016
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2015 – December 31, 2015
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 2015 – November 30, 2015
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2015 – October 31, 2015
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
August 1, 2015 – February 7, 2018
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
July 1, 2015 – February 7, 2018
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2015 – June 30, 2015
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
May 1, 2015 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2015 – May 31, 2015
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
April 1, 2015 – February 7, 2018
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
March 1, 2015 – February 7, 2018
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
February 1, 2015 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2014 – December 31, 2014
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
November 1, 2014 – February 7, 2018
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
October 1, 2014 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2014 – August 31, 2014
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2014 – July 31, 2014
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
July 1, 2014 – February 7, 2018
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
June 1, 2014 – February 7, 2018
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
April 1, 2014 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 2014 – March 31, 2014
Resolved
Failure to Filter (SWTR)
Health-based
Surface Water Treatment Rule
February 1, 2014 – February 7, 2018
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2014 – February 28, 2014
Resolved
Notification, Public
—
No contaminant on record
September 1, 1984 – September 30, 1984
Archived
Notification, Public
—
No contaminant on record
August 1, 1984 – August 31, 1984
Archived
Notification, Public
—
No contaminant on record
July 1, 1984 – July 31, 1984
Archived
Notification, Public
—
No contaminant on record
December 1, 1982 – December 31, 1982
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
May 1, 2018 – May 31, 2018	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
April 1, 2018 – April 30, 2018	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
March 1, 2018 – March 31, 2018	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
November 1, 2016 – November 30, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 2016 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 2016 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2016 – September 30, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2016 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2016 – July 31, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2016 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2016 – June 30, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2016 – May 31, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2016 – April 30, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2016 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 2016 – March 31, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2016 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2016 – February 29, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2016 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2016 – January 31, 2016	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
December 1, 2015 – December 31, 2015	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 2015 – November 30, 2015	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 2015 – October 31, 2015	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2015 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2015 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2015 – June 30, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 2015 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2015 – May 31, 2015	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2015 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 2015 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2015 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
December 1, 2014 – December 31, 2014	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 2014 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
October 1, 2014 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2014 – August 31, 2014	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2014 – July 31, 2014	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2014 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2014 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2014 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 2014 – March 31, 2014	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2014 – February 7, 2018	Failure to Filter (SWTR)	Surface Water Treatment Rule	Health-based	Resolved
February 1, 2014 – February 28, 2014	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 1984 – September 30, 1984	Notification, Public	—	—	Archived
August 1, 1984 – August 31, 1984	Notification, Public	—	—	Archived
July 1, 1984 – July 31, 1984	Notification, Public	—	—	Archived
December 1, 1982 – December 31, 1982	Notification, Public	—	—	Archived
October 1, 1981 – September 30, 1982	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

September 9, 2025State Administrative/Compliance Order without penalty issued7 linked violations
July 19, 2018State Compliance achieved7 linked violations
February 7, 2018State Compliance achieved83 linked violations
February 18, 2015State Administrative/Compliance Order without penalty issued1 linked violation
November 14, 2014State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
August 12, 2014State Public Notification requested3 linked violations
December 16, 2013State Administrative/Compliance Order without penalty issued2 linked violations
November 15, 2013State Administrative/Compliance Order without penalty issued3 linked violations
October 15, 2013State Administrative/Compliance Order without penalty issued28 linked violations
July 1, 2013State Administrative/Compliance Order without penalty issued7 linked violations
September 18, 2006State Violation/Reminder Notice1 linked violation
September 18, 2006State Public Notification requested1 linked violation
April 30, 2005State Compliance achieved1 linked violation
December 30, 2003State Administrative/Compliance Order without penalty issued26 linked violations

Common questions

Is LAS CUMBRES MUTUAL WATER CO required to publish a Consumer Confidence Report?: Yes. LAS CUMBRES 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 LAS CUMBRES MUTUAL WATER CO’s next Consumer Confidence Report due?: LAS CUMBRES MUTUAL WATER CO’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does LAS CUMBRES 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 LAS CUMBRES 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

YEE, JUDY

408-395-4095

LOS GATOS, CA 95033