Tap water in Seattle, WA — ZIP 98166
4 public water systems serving about 1,334,092 people.
A
Excellent
Water systems serving 98166
Seattle Public Utilities
PWSID WA5377050 · serves 1,161,961 ·
surface water
0 health-based / 0 total violations (5 yrs)
Highline Water District
PWSID WA5340650 · serves 100,170 ·
surface water
0 health-based / 0 total violations (5 yrs)
King County Water District #20
PWSID WA5338950 · serves 48,469 ·
surface water
0 health-based / 0 total violations (5 yrs)
King County Water District #49
PWSID WA5339800 · serves 23,492 ·
surface water
0 health-based / 0 total violations (5 yrs)
Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology