FREMONT, CA · Alameda County
ALAMEDA COUNTY WATER DISTRICT Water System
Consumer Confidence Report status
ALAMEDA COUNTY WATER DISTRICT 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 ALAMEDA COUNTY WATER DISTRICT.
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)
- CA0110001
- System type
- Community Water System
- Population served
- 344,000
- Service connections
- 86,959
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
ALAMEDA COUNTY WATER DISTRICT is among the 12 largest community water systems in California, serving 344,000 people from surface water.
As of August 1, 2026, its federal record holds 1 entry in 1992, all of which EPA lists as closed. Nothing has been added since 1992.
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, Routine Minor (TCR)
—Coliform (TCR)
September 1, 1992 – September 30, 1992
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| September 1, 1992 – September 30, 1992 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- June 10, 1997State Compliance achieved2 linked violations
- May 20, 1997State Public Notification requested2 linked violations
- June 30, 1993State Compliance achieved2 linked violations
- September 21, 1992State Violation/Reminder Notice8 linked violations
Common questions
Is ALAMEDA COUNTY WATER DISTRICT required to publish a Consumer Confidence Report?
- Yes. ALAMEDA COUNTY WATER DISTRICT 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 ALAMEDA COUNTY WATER DISTRICT’s next Consumer Confidence Report due?
- ALAMEDA COUNTY WATER DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does ALAMEDA COUNTY WATER DISTRICT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for ALAMEDA COUNTY WATER DISTRICT.
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
STEVENSON, ED
510-668-4200
FREMONT, CA 94538-6348