Tap Water Quality in Seattle, WA
Find out what's in your drinking water. Enter your ZIP code below for a detailed water quality report for Seattle, Washington.
Try 98101 for Seattle
Seattle Drinking Water Overview
Population: ~740,000 | Source: Cedar River Watershed and South Fork Tolt River
Seattle Public Utilities draws from two protected mountain watersheds in the Cascade Range. The Cedar River watershed has been closed to public access for over a century, resulting in exceptionally clean source water. Like Portland, Seattle's main water quality concern is lead from older building plumbing rather than source water contamination.
Common water quality concerns in Seattle
Lead from older plumbing
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Disinfection byproducts
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Naturally occurring minerals
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What's in your Seattle water report
Contaminant levels
Every detected contaminant in your Seattle water system, compared to EPA limits and health guidelines.
Violation history
All EPA violations on record for water systems serving Seattle, including health-based and monitoring violations.
Water quality grade
An A through F grade based on violation history, contaminant levels, and health guideline comparisons.
Filter recommendations
Which type of water filter will actually remove the contaminants found in your specific water system.
Water quality in nearby cities
Check your Seattle water now
Enter your ZIP code for a free water quality report specific to your water system in Seattle, Washington.