Mercer Island
Is Mercer Island tap water safe to drink?
Mostly yes — Mercer Island scores 96/100. This report aggregates EPA drinking water data across 0 local systems in Mercer Island. We found 0 total violations (0 unresolved).
Real-Time Environment
Live: 08:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Mercer Island.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Mercer Island?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filter or no filter for Mercer Island water? Here's what the data says.
Baby Formula Safety
What new parents in Mercer Island should know about tap water safety.
Homebuyer's Perspective
Water quality is easy to overlook when evaluating a move to Mercer Island, but it can affect plumbing longevity and appliance lifespan. The high safety score (96/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Current records show no major contaminant spikes, making Mercer Island a preferred choice for health-conscious families.
View Health Risk Glossary →Compliance Record for Mercer Island
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Mercer Island.
Frequently Asked Questions
Is Mercer Island tap water safe to drink?
Mostly yes — Mercer Island scores 96/100.
How many water systems serve Mercer Island?
Mercer Island is served by 0 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Mercer Island?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Mercer Island.
What is the water quality score for Mercer Island?
The water quality score for Mercer Island is 96 out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in Mercer Island?
Current contaminant data for Mercer Island is being updated. Check back soon or search your specific address for the latest results.
Mercer Island Water Quality Summary
Mercer Island, WA receives a water quality score of 96/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
Mercer Island's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Mercer Island's score of 96 is 1 point above the Washington state average of 95, and above the nationwide average of roughly 78/100 across all U.S. states.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Washington water quality rankings report →
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Water Systems Serving Mercer Island (0)
Water system data coming soon for Mercer Island.
Check Your Specific Address
Water quality can vary by neighborhood in Mercer Island.
Related
Quick compare in Washington
Compare Mercer Island water quality: View all states · Contaminant library · How we score water quality