SAN JOSE, CA · Santa Clara County
GREAT OAKS WC INC Water System
Consumer Confidence Report status
GREAT OAKS WC INC 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 GREAT OAKS WC INC.
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)
- CA4310022
- System type
- Community Water System
- Population served
- 110,088
- Service connections
- 21,415
- Ownership
- privately owned
- Water source
- groundwater (wells)
GREAT OAKS WC INC is one of 92 community water systems in California in the more than 100,000 people size category, serving 110,088 people from groundwater.
As of August 1, 2026, its federal record holds 1 entry in 2005, all of which EPA lists as closed. Nothing has been added since 2005.
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 Total Coliform Rules.
Violation history
Monitoring, Repeat Minor (TCR)
—Coliform (TCR)
August 1, 2005 – August 31, 2005
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| August 1, 2005 – August 31, 2005 | Monitoring, Repeat Minor (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- April 30, 2015State Compliance achieved15 linked violations
- November 1, 2005State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- September 30, 2005State Compliance achieved68 linked violations
- August 17, 2004State Compliance achieved3 linked violations
- May 5, 2004State Public Notification requested1 linked violation
Common questions
Is GREAT OAKS WC INC required to publish a Consumer Confidence Report?
- Yes. GREAT OAKS WC INC 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 GREAT OAKS WC INC’s next Consumer Confidence Report due?
- GREAT OAKS WC INC’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does GREAT OAKS WC INC have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for GREAT OAKS WC INC.
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
ROEDER, JOHN
408-227-9540
SAN JOSE, CA 95119