ESTERO MUNICIPAL IMPROVEMENT DISTRICT
Community Water System · California · FOSTER CITY
PWSID: CA4110021
Compliant
Population Served
36.6K
Service Connections
8.0K
Total Violations
7
Health-Based Violations
3
Lead & Copper Data
Lead Level
Elevated5.40 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
- FOSTER CITY
- ZIP Code
- 94404
- Counties Served
- San Mateo
- Cities Served
- Foster City
- Open Violations
- 0
- State
- California
Violation Summary
7
Total Violations
3
Health-Based
0
Open Now
Most recent violation: 2022-07-01
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: CA4110021.SafeWater Home