We read 8 results from Bainbridge Island City of’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 12,486 people · Water system ID WA5397650 · 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 |
|---|---|---|---|---|
| Arsenicas reported · range 4 to 5 · sampled 2024 · 2025 report, page 2 | 5 ppb | 0.004 ppb | 10 ppb | Above the health goal1,250x the health goal |
| Gross alpha (radioactivity)as reported · range 0.3 to 0.8 · sampled 2023 · 2025 report, page 2 | 0.8 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium-228as reported · range 0.04 to 0.07 · sampled 2023 · 2025 report, page 2 | 0.07 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal3.7x the health goal |
| Chlorineas reported · range 0.01 to 1.61 · 2025 report, page 2 | 1.61 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)as reported · range ND to 3.32 · 2025 report, page 2 | 3.32 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)as reported · range 31.4 to 34 · 2025 report, page 2 | 34 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideas reported · range 0.48 to 0.87 · 2025 report, page 2 | 0.87 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)as reported · 2025 report, page 2 | Not detected | 10 ppm | 10 ppm | Not detected |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Radium and uranium
Found: Gross alpha (radioactivity), Radium-228
What removes it: Reverse osmosis.
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