MERCER ISLAND CITY OF
Community Water System · Washington · Mercer Island
PWSID: WA5353640
Compliant
Population Served
30.7K
Service Connections
9.8K
Total Violations
8
Health-Based Violations
3
Lead & Copper Data
Lead Level
No lead sampling data available
Copper Level
No copper sampling data available
System Details
- Water Source
- Purchased Surface Water
- System Type
- Community Water System
- City
- Mercer Island
- ZIP Code
- 98040
- Counties Served
- King
- Cities Served
- Mercer Island
- Open Violations
- 0
- State
- Washington
Violation Summary
8
Total Violations
3
Health-Based
0
Open Now
Most recent violation: 1992-12-01
Explore Washington Water Quality
See all water systems, lead data, and violation trends for Washington.
Data source: EPA ECHO SDWIS Bulk Download (Jan 2026). PWSID: WA5353640.SafeWater Home