SAN JOSE, CA · Los Angeles County
CALIFORNIA WATER SERVICE CO. - DOMINGUEZ Water System
Consumer Confidence Report status
CALIFORNIA WATER SERVICE CO. - DOMINGUEZ 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 CALIFORNIA WATER SERVICE CO. - DOMINGUEZ.
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)
- CA1910033
- System type
- Community Water System
- Population served
- 143,996
- Service connections
- 33,150
- Ownership
- privately owned
- Water source
- surface water (rivers, lakes, or reservoirs)
CALIFORNIA WATER SERVICE CO. - DOMINGUEZ is one of 92 community water systems in California in the more than 100,000 people size category, serving 143,996 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 2001 and 2018, all of which EPA lists as closed. Nothing has been added since 2018.
All 2 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 Stage 2 Disinfectants and Disinfection Byproducts Rule and the Total Coliform Rules.
Violation history
Monitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
April 1, 2018 – June 30, 2018
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
November 1, 2001 – November 30, 2001
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 2018 – June 30, 2018 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| November 1, 2001 – November 30, 2001 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- January 10, 2020State Compliance achieved4 linked violations
- August 23, 2018State Formal Notice of Violation issued4 linked violations
- March 7, 2002State Formal Notice of Violation issued2 linked violations
- December 20, 1995State Compliance achieved1 linked violation
- September 30, 1993State Compliance achieved1 linked violation
Common questions
Is CALIFORNIA WATER SERVICE CO. - DOMINGUEZ required to publish a Consumer Confidence Report?
- Yes. CALIFORNIA WATER SERVICE CO. - DOMINGUEZ 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 CALIFORNIA WATER SERVICE CO. - DOMINGUEZ’s next Consumer Confidence Report due?
- CALIFORNIA WATER SERVICE CO. - DOMINGUEZ’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CALIFORNIA WATER SERVICE CO. - DOMINGUEZ have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for CALIFORNIA WATER SERVICE CO. - DOMINGUEZ.
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
HENRIE, TARRAH
408-367-8490
SAN JOSE, CA 95112