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Is Oak Harbor, WA tap water safe?

15 utilities serve Oak Harbor, by EPA’s records. Here is what EPA’s and Washington’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

4 of the 15 utilities serving Oak Harbor have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records: Rolling Hills - Glencairn, Penn Cove Water and Sewer District, Silver Lake Water and 1 more.

City of Oak Harbor, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 1.9 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from City of Oak Harbor is soft to very hard depending on the source, 21 to 258 mg/L (1.2 to 15.1 grains per gallon). How Washington’s water compares.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Oak Harbor’s ZIP codes, from EPA’s estimates.

5 more utilities in Oak Harbor

By EPA’s estimate, each serves fewer people in Oak Harbor than those above.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in City of Oak Harbor’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near Oak Harbor

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab Washington certifies.

The 3 labs Washington certifies closest to Oak Harbor, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Eurofins DW and WW West, Washington Laboratory

    Burlington, WA · about 18 miles

    Certified for bacteria, nitrate, minerals and other inorganics, disinfection byproducts

    (360) 757-1400

  • Precision Analytical Laboratories, LLC

    Everett, WA · about 29 miles

    Certified for lead and copper, metals, minerals and other inorganics

    (425) 740-4597

  • Everett Environmental Laboratory

    Everett, WA · about 31 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (425) 257-8230

All 84 certified labs for Washington

ZIP codes in Oak Harbor

Which ZIP codes are in Oak Harbor: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Washington State Department of Ecology, Lab Accreditation Program, environmental laboratories accredited for drinking water analyses; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Oak Harbor

Other towns in Island County with a page of their own.

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