TOWN OF HILLSBOROUGH
Community Water System · California · HILLSBOROUGH
PWSID: CA4110016
Compliant
Population Served
11.8K
Service Connections
4.3K
Total Violations
5
Health-Based Violations
2
Lead & Copper Data
Lead Level
Elevated6.50 ppb
Action Level: 15 ppb (EPA) · Sampled: 2022-12-31
015 ppb action level
Copper Level
No copper sampling data available
System Details
- Water Source
- Purchased Surface Water
- System Type
- Community Water System
- City
- HILLSBOROUGH
- ZIP Code
- 94010
- Counties Served
- San Mateo
- Cities Served
- Hillsborough
- Open Violations
- 0
- State
- California
Violation Summary
5
Total Violations
2
Health-Based
0
Open Now
Most recent violation: 2014-05-01
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: CA4110016.SafeWater Home