Seattle
Is Seattle tap water safe to drink?
Mostly yes — Seattle scores 82/100. This report aggregates EPA drinking water data across 1 local system in Seattle. We found 0 total violations (0 unresolved).
Real-Time Environment
Live: 02:45 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Seattle.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Seattle?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Should you buy a water purifier in Seattle? See our analysis.
Baby Formula Safety
Is Seattle tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to Seattle, water quality is a key factor in long-term property maintenance. The high safety score (82/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Copper levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Score Breakdown for Seattle
*Scores are calculated using weighted EPA monitoring data from the past 5 years.
Frequently Asked Questions
Is Seattle tap water safe to drink?
Mostly yes — Seattle scores 82/100.
How many water systems serve Seattle?
Seattle is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in Seattle?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Seattle.
What is the water quality score for Seattle?
The water quality score for Seattle is N/A out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in Seattle?
The top contaminants detected in Seattle include Copper, Chromium (Total), Nitrate. View detailed information on our contaminants page.
Seattle Water Quality Summary
Seattle, WA receives a water quality score of 82/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 6 public water systems serving the area.
Seattle'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.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology →
Key Contaminants
Water Systems Serving Seattle (1)
Check Your Specific Address
Water quality can vary by neighborhood in Seattle.
Related
Quick compare in Washington
Compare Seattle water quality: View all states · Contaminant library · How we score water quality