Water Quality: Mercer Island, WA
2 water systems • 30,785 people served
No Health ViolationsWater Quality Summary
Mercer Island is served by 2 public water systems with a combined service population of 30,785 people, and has 1 EPA Safe Drinking Water Act violation on record. None of those violations are health-based — the records reflect missed monitoring or reporting deadlines rather than a contaminant exceeding safe levels. Mercer Island's violation count is 99% below the national average for Washington.
Water Systems Serving Mercer Island
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| MERCER ISLAND CITY OF | WA5353640 | Surface Water | 30,689 | 0 |
| SPRING GLEN MOBILE HOME PARK | WA5383290 | Groundwater | 96 | 1 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Washington
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.