Is SAMMAMISH PLATEAU WATER & SEWER Water Safe to Drink in 2026?
Washington · PWSID WA5340900 · Surface water
Population served
79,362
Cities served
—
State / jurisdiction
Washington (WA)
PWSID
WA5340900
F
TAP WATER GRADE
High risk
Model score 0/88 from violations, PFAS profile, and monitoring signals — not a laboratory test of your faucet.
77 violation record(s) in the latest EPA SDWA quarterly snapshotPFAS above EPA MCL (UCMR5 regulated compounds)
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CONTAMINANTS — EPA UCMR5 MONITORING
Compound
Level (ppt)
EPA limit
Health guideline
Status
PFHxSregulated
16.5
10 ppt
Exceeds
Above health advisory
PFOSregulated
11.1
4 ppt
Exceeds
Above health advisory
PFBS
8.8
—
Within / n/a
Unregulated (monitored)
PFHxA
4.3
—
Within / n/a
Unregulated (monitored)
PFPeS
4.1
—
Within / n/a
Unregulated (monitored)
PFPeA
3.9
—
Within / n/a
Unregulated (monitored)
Source: EPA UCMR5 · ppt = parts per trillion · MCL = enforceable limit for regulated PFAS
VIOLATIONS HISTORY (FEDERAL SNAPSHOT)
EPA’s national SDWA quarterly files associate 77 violation-related records with this system in the same reporting quarter as the utility snapshot used on WaterCheckup. This is not a complete historical docket — see ECHO and SDWIS for full compliance context.
Based on SAMMAMISH PLATEAU WATER & SEWER's monitoring and violation profile, here are vetted filtration options — same picks framework as our city reports.
TOP PICKS FOR SAMMAMISH PLATEAU WATER & SEWER
⚠ EPA violations / contaminants in monitoring data
WHY THIS FOR SAMMAMISH PLATEAU WATER & SEWER · Chosen for SAMMAMISH PLATEAU WATER & SEWER because PFAS was detected at 16.5 ppt in UCMR5 — above the 4 ppt limit for some regulated compounds — and this system shows 77 violation record(s) in the latest federal snapshot. RO removes 99%+ of PFAS at the tap.
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