SHOAL BAY & SWIFT BAY WATER ASSN.

Lopez Island, WA · ~35 people served

Check your exact address → Lopez Island overview

100

Excellent

PurityRadar safety score

PWSID

WA5378398

State

Washington

City

Lopez Island

Population served

Primary source

Groundwater

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2018. Official EPA record →

Other · EPA contaminant 7000 began Jul 2017 Resolved

Other · EPA contaminant 7000 began Jul 2014 Resolved

Other · EPA contaminant 7000 began Jul 2012 Resolved

Monitoring & reporting · Total coliform began Dec 2010 Resolved

Monitoring & reporting · Total coliform began Nov 2010 Resolved

Monitoring & reporting · Fluoride began Jan 2002 Resolved

Monitoring & reporting · Selenium began Jan 2002 Resolved

Monitoring & reporting · EPA contaminant 1036 began Jan 2002 Resolved

Monitoring & reporting · Antimony began Jan 2002 Resolved

Monitoring & reporting · Beryllium began Jan 2002 Resolved

Monitoring & reporting · EPA contaminant 1075 began Jan 2002 Resolved

Monitoring & reporting · EPA contaminant 1085 began Jan 2002 Resolved

Recent enforcement actions

State action · SOX Jan 2018
State action · SOX Sep 2014
State action · SOX Oct 2012
State action · SOX Jan 2011
State action · SOX Oct 2006
State action · SOX Oct 2006
State action · SOX Oct 2006
State action · SOX Oct 2006

This profile is built from EPA public records for system WA5378398 — 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.