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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
EPA SDWIS/ECHO 2026Q2 · UCMR5 (2023–2026, July 2026 release) · SYR4 six-year review 2012–2019 · Methodology
Grade A — based on EPA compliance records, lead testing and PFAS monitoring
SEATTLE PUBLIC UTILITIES has a clean recent record: no health-based violations in the last five years and no lead, PFAS or historical monitoring result that costs it more than a few points.
Yes — by EPA's records Seattle, WA tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years and lead at 1.6 ppb (90th percentile, 2025) against the 15 ppb action level. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
Yes — by EPA's records Seattle, WA tap water is safe to drink and earns an A. The grade rests on no health-based EPA violations in the last five years and lead at 1.6 ppb (90th percentile, 2025) against the 15 ppb action level. Lead from your own service line or plumbing is the main risk city-level data cannot see, so homes built before 1986 should still test at the tap.
SEATTLE PUBLIC UTILITIES's most recent Lead and Copper Rule result (2025-01-01 to 2025-12-31) was 1.6 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
No. None of the 232 UCMR5 PFAS results for SEATTLE PUBLIC UTILITIES (2023-03-14 to 2023-12-18) were at or above the reporting limit of roughly 3–5 ppt.
No. EPA's SDWIS shows no violations of any kind for SEATTLE PUBLIC UTILITIES since 2016.
SEATTLE PUBLIC UTILITIES reports surface water as its primary source and serves about 1,161,961 people (EPA PWSID WA5377050).
Not on the strength of EPA's data for SEATTLE PUBLIC UTILITIES. A filter still helps with taste and with lead from your own plumbing, which no city-level test can measure.
Even with good water quality, a filter removes trace contaminants and improves taste.
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