ROSEMEAD, CA · Ventura County
CAL AMERICAN WC - RIO PLAZA Water System
Consumer Confidence Report status
CAL AMERICAN WC - RIO PLAZA 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 CAL AMERICAN WC - RIO PLAZA.
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)
- CA5610010
- System type
- Community Water System
- Population served
- 1,709
- Service connections
- 519
- Ownership
- privately owned
- Water source
- groundwater (wells)
CAL AMERICAN WC - RIO PLAZA is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 1,709 people from groundwater.
As of August 1, 2026, its federal record holds 1 entry in 2015, all of which EPA lists as closed. Nothing has been added since 2015.
None of the 1 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Total Coliform Rules.
Violation history
Maximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
June 1, 2015 – June 30, 2015
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 1, 2015 – June 30, 2015 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Common questions
Is CAL AMERICAN WC - RIO PLAZA required to publish a Consumer Confidence Report?
- Yes. CAL AMERICAN WC - RIO PLAZA 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 CAL AMERICAN WC - RIO PLAZA’s next Consumer Confidence Report due?
- CAL AMERICAN WC - RIO PLAZA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CAL AMERICAN WC - RIO PLAZA have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for CAL AMERICAN WC - RIO PLAZA.
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
PHILLIPS, MIKE C.
626-614-2531
ROSEMEAD, CA 91770