We read 18 results from Menlo Park Municipal Water’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 19,297 people · Water system ID CA4110017 · 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 |
|---|---|---|---|---|
| Lead90th percentile of 32 homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 7 | 3.3 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal16x the health goal |
| pHaverage · range 5.7 to 10.4 · 2025 report, page 7 | 8.95 | — | — | Outside the normal rangeAlkaline water can leave scale |
| Chloraminehighest running annual average · range 0.92 to 3.7 · 2025 report, page 6 | 2.9 ppm | None set | 4 ppm | Below the legal limit |
| Chlorideaverage · range ND to 11 · 2025 report, page 6 | 5.4 ppm | — | 250 ppm guideline | Within the guideline |
| Chromium-6average · range ND to 0.1 · 2025 report, page 6 | 0.02 ppb | 0.02 ppb | 10 ppb | Below the health goal |
| Copper90th percentile of 32 homes tested, 0 over the action level · printed as 49 ppb · sampled 2024 · Customer taps · 2025 report, page 7 | 0.05 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 9.5 to 37.8 · 2025 report, page 6 | 30.8 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 22 to 65.5 · 2025 report, page 6 | 47.8 ppb | None set | 80 ppb | Below the legal limit |
| Ironaverage · range ND to 0.04 · printed as 18 ppb · 2025 report, page 6 | 0.02 ppm | — | 0.3 ppm guideline | Within the guideline |
| Sulfateaverage · range 1 to 45 · 2025 report, page 6 | 23 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 24 to 197 · 2025 report, page 6 | 111 ppm | — | 500 ppm guideline | Within the guideline |
| Alkalinityaverage · range 8 to 131 · 2025 report, page 7 | 61 ppm | None set | None | No health limit |
| Boronaverage · range 0.02 to 0.07 · printed as 46 ppb · 2025 report, page 7 | 0.05 ppm | None set | None | No health limit |
| Calciumaverage · range 3.1 to 29 · 2025 report, page 7 | 16 ppm | None set | None | No health limit |
| Conductivityaverage · range 32 to 346 · 2025 report, page 6 | 189 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 0.47 to 6.55 · 2025 report, page 7 | 3.51 gpg (60 ppm) | — | — | Moderately hard |
| Magnesiumaverage · range 0.2 to 10 · 2025 report, page 7 | 5.1 ppm | None set | None | No health limit |
| Total organic carbonaverage · range 1.4 to 3.1 · 2025 report, page 7 | 2.1 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 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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