Lopez Island, Washington Tap Water Quality

1,758 people served · 11 water systems

Excellent

Lopez Island, Washington is a rural community with 1,758 residents served by a network of 11 public water systems. Water service covers ZIP code 98261.

Lopez Island's drinking water utilities have maintained full EPA compliance over the most recent five-year reporting window — no health-based MCL exceedances have been recorded.

Last updated: 2026-05-18 · Source: EPA SDWIS

Location

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Centered on ZIP-code centroids of water systems serving this city.

ZIP Codes Served

98261

Health-Based Violations (Last 5 Years)

EPA Maximum Contaminant Level exceedances reported by water systems serving Lopez Island. Each entry explains the contaminant, the health risk, and recommended precautions, and links to a full guide.

✅

No health-based violations in the last 5 years.

Lopez Island's water systems have met EPA health-based Maximum Contaminant Level (MCL) requirements throughout the EPA reporting window. This does not mean zero detection of regulated contaminants — it means all measured concentrations remained below their federal action levels.

Water Systems Serving Lopez Island

Milagra Water System

PWSID: WA53AA517

31 served

ALECK BAY PARK WATER SYSTEM

PWSID: WA5301338

40 served

MacKaye Harbor Water District

PWSID: WA5312911

133 served

FISHERMAN BAY WATER ASSOCIATION

PWSID: WA5325547

1,195 served

HARBOR ON FISHERMAN BAY

PWSID: WA5331024

84 served

HUMPHREY HEAD OWNERS ASSOC

PWSID: WA5334860

37 served

NORTH LOPEZ SERVICE

PWSID: WA5360665

114 served

SHOAL BAY & SWIFT BAY WATER ASSN.

PWSID: WA5378398

35 served

SUNRISE BEACH ASSOCIATION

PWSID: WA5385641

27 served

Common Field Water System

PWSID: WA53AB738

36 served

Salish Sea Water System

PWSID: WA53AC941

26 served

What Can You Do?

✅ Request your utility's annual Consumer Confidence Report (CCR) — required by law.
✅ Use an NSF-certified water filter if violations involve lead, arsenic, or PFAS.
✅ Run cold water for 30 seconds before drinking if you have older plumbing (reduces lead).
✅ Check back monthly — we update data from the EPA every 30 days.

About this data

This overview reflects EPA SDWIS data published as of 2026-05-18. It covers active Community Water Systems (CWS) that remained within federal Maximum Contaminant Levels during the past five-year EPA reporting window. For up-to-the-minute information, request a current Consumer Confidence Report from your utility, or review the EPA's public dashboard.

Frequently Asked Questions

Is Lopez Island, Washington tap water safe to drink?▼

This city's water had no EPA health-based violations in the last 5 years.

How many EPA violations does Lopez Island have?▼

Lopez Island has 0 EPA health-based water violations in the last 5 years across 11 water systems serving 1,758 people.

Should I use a water filter in Lopez Island?▼

Using an NSF-certified water filter is recommended if your area has violations involving lead, arsenic, or PFAS. For other contaminants, consult your local water utility. Check the annual Consumer Confidence Report (CCR) for detailed guidance.

What should I do if there are violations in Lopez Island?▼

Request your water utility's annual Consumer Confidence Report (CCR), which is required by the EPA. Follow the utility's guidance on boil water advisories. Run cold water for 30 seconds before drinking if you have older plumbing. Use an NSF-certified filter if needed based on your water system's violations.