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Water system · PWSID WA5338900

WATER DISTRICT 19

Vashon, WA · ~3,723 people served

Check your exact address → Vashon overview
100
Excellent
PurityRadar safety score

PWSID

WA5338900

State

Washington

City

Vashon

Population served

3,723

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

104

Violations on record

0

Unaddressed

3

Health-based

26

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →

Treatment technique · EPA contaminant 0800 health-based began Aug 2025 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2020 Resolved
Monitoring & reporting · EPA contaminant 0200 began Sep 2016 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2014 Resolved
Other · EPA contaminant 7000 began Jul 2010 Resolved
Monitoring & reporting · Nitrate began Jan 2009 Resolved
Treatment technique · EPA contaminant 0200 health-based began Mar 2006 Resolved
Monitoring & reporting · EPA contaminant 2981 began Jan 2006 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2006 Resolved
Monitoring & reporting · EPA contaminant 2982 began Jan 2006 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2006 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2006 Resolved

Recent enforcement actions

  • State action · SIA Sep 2025
  • State action · SOX Sep 2025
  • State action · SOX Dec 2020
  • State action · SIA Oct 2020
  • State action · SOX Oct 2016
  • State action · SOX Sep 2016
  • State action · SIA Sep 2016
  • State action · SIA Sep 2016

This profile is built from EPA public records for system WA5338900 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.