Public Water Partners

San Jose, CA · San Mateo County

WOODSIDE MUTUAL Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of August 9, 2011. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in San Mateo County, CA.

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)
CA4100546
System type
Community Water System
Population served
195
Service connections
65
Ownership
privately owned
Water source
surface water (rivers, lakes, or reservoirs)

WOODSIDE MUTUAL is one of 3,951 community water systems in California in the 500 or fewer people size category, formerly serving 195 people from surface water.

EPA's federal records list this system as inactive in 2011; the record below is historical.

As of August 1, 2026, its federal record holds 1 entry in 1981, all of which EPA lists as closed. Nothing has been added since 1981.

All 1 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 Radionuclides and Revised Rad Rule.

Violation history

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    October 1, 1981 – September 30, 1982

    Archived

Archived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Last known contact on file (system is inactive)

WOODSIDE MUTUAL

4083678376

San Jose, CA 95112