Tap water in Sammamish, WA — ZIP 98029
3 public water systems serving about 129,216 people. PFAS "forever chemicals" have been detected here.
F
Failing
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 98029
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
Issaquah Water System
PWSID WA5336350 · serves 43,584 ·
surface water
0 health-based / 0 total violations (5 yrs)
Bryan Co. Rws & Swmd #2
PWSID OK1010604 · serves 6,270 ·
surface water
3 health-based / 9 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