ONTARIO, CA · San Bernardino County
ONTARIO MUNICIPAL UTILITIES COMPANY Water System
Consumer Confidence Report status
ONTARIO MUNICIPAL UTILITIES COMPANY 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 ONTARIO MUNICIPAL UTILITIES COMPANY.
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)
- CA3610034
- System type
- Community Water System
- Population served
- 185,010
- Service connections
- 39,996
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
ONTARIO MUNICIPAL UTILITIES COMPANY is one of 92 community water systems in California in the more than 100,000 people size category, serving 185,010 people from surface water.
As of August 1, 2026, EPA's published records contain no violations for this system.
Violation history
No violations on record for this system.
Enforcement actions
- September 15, 1994State Compliance achieved1 linked violation
- May 16, 1994State Bilateral Compliance Agreement signed1 linked violation
- May 13, 1994State Compliance achieved1 linked violation
- July 19, 1993State Administrative/Compliance Order without penalty issued1 linked violation
Common questions
Is ONTARIO MUNICIPAL UTILITIES COMPANY required to publish a Consumer Confidence Report?
- Yes. ONTARIO MUNICIPAL UTILITIES COMPANY 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 ONTARIO MUNICIPAL UTILITIES COMPANY’s next Consumer Confidence Report due?
- ONTARIO MUNICIPAL UTILITIES COMPANY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does ONTARIO MUNICIPAL UTILITIES COMPANY have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for ONTARIO MUNICIPAL UTILITIES COMPANY.
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
BURTON, SCOTT
909-395-2682
ONTARIO, CA 91761