ONTARIO MUNICIPAL UTILITIES COMPANY
Community Water System · California · ONTARIO
PWSID: CA3610034
Compliant
Population Served
185.0K
Service Connections
40.0K
Total Violations
9
Health-Based Violations
4
Lead & Copper Data
Lead Level
Safe0.60 ppb
Action Level: 15 ppb (EPA) · Sampled: 2024-12-31
015 ppb action level
Copper Level
No copper sampling data available
System Details
- Water Source
- Purchased Surface Water
- System Type
- Community Water System
- City
- ONTARIO
- ZIP Code
- 91761
- Counties Served
- San Bernardino
- Cities Served
- ONTARIO
- Open Violations
- 0
- State
- California
Violation Summary
9
Total Violations
4
Health-Based
0
Open Now
Most recent violation: 1993-06-01
Explore California Water Quality
See all water systems, lead data, and violation trends for California.
Data source: EPA ECHO SDWIS Bulk Download (Jan 2026). PWSID: CA3610034.SafeWater Home