We read 4 results from Oak Harbor City of’s 2025 water quality report. No results over a legal limit or above a health goal.
Serves about 23,767 people · Water system ID WA5362650 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Chlorineaverage · Oak Harbor distribution · 2025 report, page 2 | 0.84 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 17.9 to 26.8 · Oak Harbor distribution, highest of 2 sources · 2025 report, page 2 | 21.3 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.24 to 0.92 · Oak Harbor distribution · 2025 report, page 2 | 0.68 ppm | 1 ppm | 4 ppm | Below the health goal |
| Turbidity (cloudiness)average · range 0.01 to 0.03 · Anacortes WTP (supplier) · 2025 report, page 2 | 0.02 NTU | None set | 1 NTU | Below the legal limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 1 number we weren’t sure about is held back until a person checks.
What you can do
Nothing in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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