Public Water Partners

LA HONDA, CA · San Mateo County

REDWOOD TERRACE MUTUAL Water System

Consumer Confidence Report status

REDWOOD TERRACE MUTUAL 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 REDWOOD TERRACE MUTUAL.

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)
CA4100510
System type
Community Water System
Population served
56
Service connections
18
Ownership
privately owned
Water source
surface water (rivers, lakes, or reservoirs)

REDWOOD TERRACE MUTUAL is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 56 people from surface water.

As of August 1, 2026, its federal record holds 27 entries between 1980 and 2009, all of which EPA lists as closed. Nothing has been added since 2009.

Of the 27, 24 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 synthetic organic chemicals, volatile organic chemicals, and the Miscellaneous Other Rules.

Violation history

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Diquat

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Glyphosate

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2009 – December 31, 2009

    Resolved

  • Notification, Public

    —

    No contaminant on record

    September 1, 1984 – September 30, 1984

    Archived

  • Notification, Public

    —

    No contaminant on record

    July 1, 1984 – July 31, 1984

    Archived

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    October 1, 1981 – September 30, 1982

    Archived

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    October 30, 1980 – October 29, 1981

    Archived

  • Maximum Contaminant Level Violation, Single Sample

    Health-based

    Mercury

    June 1, 1980 – May 31, 1982

    Archived

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

Enforcement actions

Common questions

Is REDWOOD TERRACE MUTUAL required to publish a Consumer Confidence Report?

Yes. REDWOOD TERRACE MUTUAL 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 REDWOOD TERRACE MUTUAL’s next Consumer Confidence Report due?

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

Does REDWOOD TERRACE MUTUAL have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for REDWOOD TERRACE MUTUAL.

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

MACMILLIAN, TIM

650-799-5366

LA HONDA, CA 94020