We read 17 results from East Bay MUD’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 1,442,800 people · Water system ID CA0110005 · 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 |
|---|---|---|---|---|
| Gross beta (radioactivity)average · sampled 2024 · System-wide · 2025 report, page 4 | 6.1 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Aluminumaverage · printed as ND ppb · System-wide · 2025 report, page 4 | Not detected | — | 0.2 ppm guideline | Not detected |
| Bromatehighest running annual average · System-wide · 2025 report, page 4 | Not detected | 0.1 ppb | 10 ppb | Not detected |
| Chloraminehighest running annual average · range 0.07 to 3.71 · Distribution system · 2025 report, page 4 | 2.4 ppm | None set | 4 ppm | Below the legal limit |
| Chlorideaverage · System-wide · 2025 report, page 4 | 6 ppm | — | 250 ppm guideline | Within the guideline |
| Chromium-6average · System-wide · 2025 report, page 4 | Not detected | 0.02 ppb | 10 ppb | Not detected |
| Copper90th percentile of 53 homes tested, 0 over the action level · sampled 2024 · Customer taps (53 homes) · 2025 report, page 4 | Not detected | 0.3 ppm | 1.3 ppm (action level) | Not detected |
| Disinfection byproducts (HAA5)highest running annual average · Distribution system · 2025 report, page 4 | 50 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · Distribution system · 2025 report, page 4 | 57 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · System-wide · 2025 report, page 4 | 0.7 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 53 homes tested, 0 over the action level · sampled 2024 · Customer taps (53 homes) · 2025 report, page 4 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Sulfateaverage · System-wide · 2025 report, page 4 | 7 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · System-wide · 2025 report, page 4 | 65 ppm | — | 500 ppm guideline | Within the guideline |
| Chlorateaverage · System-wide · 2025 report, page 5 | 108 ppb | None set | None | No health limit |
| NDMAhighest running annual average · Distribution system · 2025 report, page 5 | 3.9 ppt | None set | None | No health limit |
| PFBA (a PFAS)average · System-wide · 2025 report, page 5 | Not detected | None set | None | No health limit |
| PFHxA (a PFAS)average · System-wide · 2025 report, page 5 | Not detected | 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. 1 number we weren’t sure about is held back until a person checks.
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 beta (radioactivity)
What removes it: Reverse osmosis.
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