Tap water in Seattle, WA — ZIP 98178
5 public water systems serving about 1,340,290 people. PFAS "forever chemicals" have been detected here.
A
Excellent
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5
testing. Levels and the 2024 federal limits are shown per system below.
Water systems serving 98178
Seattle Public Utilities
PWSID WA5377050 · serves 1,161,961 ·
surface water
0 health-based / 0 total violations (5 yrs)
Renton City Of
PWSID WA5371850 · serves 108,091 ·
groundwater
0 health-based / 0 total violations (5 yrs)
· PFAS up to 3 ppt
Tukwila Water Department
PWSID WA5389500 · serves 36,298 ·
surface water
0 health-based / 0 total violations (5 yrs)
King County Water District #125
PWSID WA5341998 · serves 21,904 ·
surface water
0 health-based / 1 total violations (5 yrs)
Skyway Water & Sewer
PWSID WA5338800 · serves 12,036 ·
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