We read 8 results from Stanford University’s 2025 water quality report. No results over a legal limit or above a health goal.
Serves about 33,827 people · Water system ID CA4310013 · 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 |
|---|---|---|---|---|
| Chloraminehighest running annual average · range 0.2 to 3.3 · Distribution system · 2025 report, page 5 | 2.7 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · printed as < 50 ppb · sampled 2024 · Customer taps · 2025 report, page 5 | Not detected | 0.3 ppm | 1.3 ppm (action level) | Not detected |
| Disinfection byproducts (HAA5)highest running annual average · range 10 to 48 · Distribution system · 2025 report, page 5 | 33.3 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 18 to 68 · Distribution system · 2025 report, page 5 | 44.7 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of 30 homes tested · sampled 2024 · Customer taps · 2025 report, page 5 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Total dissolved solidsaverage · range 24 to 197 · SFPUC water · 2025 report, page 5 | 111 ppm | — | 500 ppm guideline | Within the guideline |
| Hardnessaverage · range 0.47 to 6.55 · SFPUC water · 2025 report, page 5 | 3.51 gpg (60 ppm) | — | — | Moderately hard |
| Sodiumaverage · range 3.1 to 29 · SFPUC water · 2025 report, page 5 | 16 ppm | None set | None | No health 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.
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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