WESTBOROUGH WATER DISTRICT
Community Water System · California · SOUTH SAN FRANCISCO
PWSID: CA4110027
Compliant
Population Served
13.5K
Service Connections
3.9K
Total Violations
4
Health-Based Violations
3
Lead & Copper Data
Lead Level
Safe0.00 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
- SOUTH SAN FRANCISCO
- ZIP Code
- 94080
- Counties Served
- San Mateo
- Cities Served
- South San Francisco
- Open Violations
- 0
- State
- California
Violation Summary
4
Total Violations
3
Health-Based
0
Open Now
Most recent violation: 1998-07-01
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: CA4110027.SafeWater Home