COASTSIDE COUNTY WATER DISTRICT
Community Water System · California · HALF MOON BAY
PWSID: CA4110011
Compliant
Population Served
18.9K
Service Connections
6.6K
Total Violations
33
Health-Based Violations
14
Lead & Copper Data
Lead Level
Caution1.60 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
- Surface Water
- System Type
- Community Water System
- City
- HALF MOON BAY
- ZIP Code
- 94019
- Counties Served
- San Mateo
- Cities Served
- Half Moon Bay
- Open Violations
- 0
- State
- California
Violation Summary
33
Total Violations
14
Health-Based
0
Open Now
Most recent violation: 2008-04-01
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: CA4110011.SafeWater Home