PALO ALTO, CA · San Mateo County
O'CONNOR TRACT CO-OPERATIVE WATER CO. Water System
Consumer Confidence Report status
O'CONNOR TRACT CO-OPERATIVE 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 O'CONNOR TRACT CO-OPERATIVE 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)
- CA4110019
- System type
- Community Water System
- Population served
- 2,789
- Service connections
- 359
- Ownership
- privately owned
- Water source
- groundwater (wells)
O'CONNOR TRACT CO-OPERATIVE WATER CO. is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 2,789 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 2015 and 2018, all of which EPA lists as closed. Nothing has been added since 2018.
Of the 2, 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 Total Coliform Rules.
Violation history
Treatment Technique, Level 1 Assessment (RTCR)
Health-basedRevised Total Coliform Rule
April 1, 2018 – August 15, 2019
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
November 1, 2015 – November 30, 2015
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 2018 – August 15, 2019 | Treatment Technique, Level 1 Assessment (RTCR) | Revised Total Coliform Rule | Health-based | Resolved |
| November 1, 2015 – November 30, 2015 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- August 15, 2019State Compliance achieved1 linked violation
- May 15, 2018State Administrative/Compliance Order without penalty issued2 linked violations
- December 30, 2015State Compliance achieved2 linked violations
- October 30, 2004State Compliance achieved1 linked violation
- June 30, 2000State Compliance achieved1 linked violation
Common questions
Is O'CONNOR TRACT CO-OPERATIVE WATER CO. required to publish a Consumer Confidence Report?
- Yes. O'CONNOR TRACT CO-OPERATIVE 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 O'CONNOR TRACT CO-OPERATIVE WATER CO.’s next Consumer Confidence Report due?
- O'CONNOR TRACT CO-OPERATIVE WATER CO.’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does O'CONNOR TRACT CO-OPERATIVE WATER CO. have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for O'CONNOR TRACT CO-OPERATIVE 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
JONES, DAVID
650-678-2208
PALO ALTO, CA 94302