EAST PALO ALTO, CA · San Mateo County
PALO ALTO PARK MUTUAL WATER COMPANY Water System
Consumer Confidence Report status
PALO ALTO PARK MUTUAL WATER COMPANY 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 PALO ALTO PARK MUTUAL WATER COMPANY.
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)
- CA4110020
- System type
- Community Water System
- Population served
- 2,900
- Service connections
- 692
- Ownership
- privately owned
- Water source
- groundwater (wells)
PALO ALTO PARK MUTUAL WATER COMPANY is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 2,900 people from groundwater.
As of August 1, 2026, its federal record holds 3 entries between 1987 and 2018, all of which EPA lists as closed. Nothing has been added since 2018.
Of the 3, 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 Groundwater Rule, the Total Coliform Rules, and the Miscellaneous Other Rules.
Violation history
Monitoring, Source Water (GWR)
—E. COLI
June 14, 2018 – August 9, 2021
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
July 1, 2015 – July 31, 2015
ResolvedNotification, Public
—No contaminant on record
August 1, 1987 – August 31, 1987
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 |
|---|---|---|---|---|
| June 14, 2018 – August 9, 2021 | Monitoring, Source Water (GWR) | E. COLI | — | Resolved |
| July 1, 2015 – July 31, 2015 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
| August 1, 1987 – August 31, 1987 | Notification, Public | — | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- August 9, 2021State Compliance achieved2 linked violations
- August 13, 2015State Administrative/Compliance Order without penalty issued4 linked violations
Common questions
Is PALO ALTO PARK MUTUAL WATER COMPANY required to publish a Consumer Confidence Report?
- Yes. PALO ALTO PARK MUTUAL WATER COMPANY 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 PALO ALTO PARK MUTUAL WATER COMPANY’s next Consumer Confidence Report due?
- PALO ALTO PARK MUTUAL WATER COMPANY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does PALO ALTO PARK MUTUAL WATER COMPANY have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for PALO ALTO PARK MUTUAL WATER COMPANY.
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
LINCOLN, NIAMBI K.V.
650-322-6903
EAST PALO ALTO, CA 94303