Tap water in Sammamish, WA — ZIP 98074

2 public water systems serving about 89,064 people. PFAS "forever chemicals" have been detected here.

Fair

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 98074

Sammamish Plateau Water & Sewer

PWSID WA5340900 · serves 79,362 · surface water

0 health-based / 0 total violations (5 yrs) · PFAS up to 16.5 ppt — above federal limit

Ne Sammamish Sewer & Water District

PWSID WA5375265 · serves 9,702 · groundwater

0 health-based / 1 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