We read 7 results from City of East Palo Alto’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 29,519 people · Water system ID CA4110024 · 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 |
|---|---|---|---|---|
| Chlorideaverage · range 290 to 330 · Treated groundwater · 2025 report, page 8 | 307 ppm | — | 250 ppm guideline | Above the guideline1.2x the guideline (taste, odor or stains; not a health limit) |
| Manganeseaverage · range 0.16 to 0.17 · Treated groundwater · 2025 report, page 8 | 0.17 ppm | — | 0.05 ppm guideline | Above the guideline3.3x the guideline (taste, odor or stains; not a health limit) |
| Total dissolved solidsaverage · range 690 to 870 · Treated groundwater · 2025 report, page 8 | 768 ppm | — | 500 ppm guideline | Above the guideline1.5x the guideline (taste, odor or stains; not a health limit) |
| Chloramineaverage · range ND to 3.8 · East Palo Alto distribution · 2025 report, page 7 | 3 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)average · range 12.2 to 67 · East Palo Alto distribution · 2025 report, page 7 | 38.2 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 22.3 to 61.8 · East Palo Alto distribution · 2025 report, page 7 | 46.1 ppb | None set | 80 ppb | Below the legal limit |
| Ironaverage · range 0.19 to 0.41 · Treated groundwater · 2025 report, page 8 | 0.26 ppm | — | 0.3 ppm guideline | Within the guideline |
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.
Salty taste / high TDS
Found: Chloride, Total dissolved solids
What removes it: Reverse osmosis.
Sediment or cloudy water
Found: Manganese
What removes it: Oxidation filter.
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