Tap water · CA
East Bay Municipal Utility District
EPA system ID CA0110005 · serves about 1,442,800 people. Every US utility must publish an annual water quality report — here’s the official one (2025), and below it, our plain-English translation.
Read the official report →What East Bay Municipal Utility District found in 2025
13 detected analytes from the utility’s own annual report, hand-normalized — 1 was near or over a limit (flagged below).
| Detected | Level | Limit | % of limit | Status |
|---|---|---|---|---|
| Haloacetic acids, 5 species | 50 ppb | 60 ppb | 83% | Near limit |
| Trihalomethanes | 57 ppb | 80 ppb | 71% | Within limit |
| Chloramine as chlorine | 2.4 ppm | 4 ppm | 60% | Within limit |
| Fluoride | 0.7 ppm | 2 ppm | 35% | Within limit |
| Specific conductance (μS/cm) | 127 μS/cm | 900 μS/cm | 14% | Within limit |
| Total dissolved solids | 65 ppm | 500 ppm | 13% | Within limit |
| Gross Beta Particle Activity | 6.1 pCi/L | 50 pCi/L | 12% | Within limit |
| Sulfate | 7 ppm | 250 ppm | 3% | Within limit |
| Chloride | 6 ppm | 250 ppm | 2% | Within limit |
| Turbidity (highest) | 0.02 NTU | 1 NTU | 2% | Within limit |
| Chlorate | 108 ppb | — | — | No federal limit |
| N-Nitrosodimethylamine - NDMA | 3.9 ppt | — | — | No federal limit |
| Total Coliform, highest % found any month | 0.3 % | — | — | No federal limit |
Levels and limits are as printed in the utility’s report (“limit” is the EPA MCL, action level, residual limit, or secondary guideline that applies to that row; “ND” = not detected). Utilities publish these reports annually — we re-check every covered utility each July, after the federal publication deadline. Detected doesn’t mean dangerous — most detections sit far below their limits. This is education, not medical advice.
Your tap, if it were a bottle
How East Bay Municipal Utility District water stacks up against the bottled aisle
Same minerals, same units — the tap values below come from the utility’s report, placed next to the closest match in our bottled-water database.
| Mineral | Your tap | Closest bottled match |
|---|---|---|
| Total dissolved solids | 65 mg/L | Poland Spring at 65 mg/L |
| Sulfate | 7 mg/L | Eska at 7.2 mg/L |
| Chloride | 6 mg/L | Voss at 6 mg/L |
Tap values are the headline levels from the utility’s annual report (often a highest or average figure); bottled values are label- or report-derived. A closest match is a numeric comparison, not an equivalence or an endorsement.
Zip codes covered
94601 · 94602 · 94603 · 94605 · 94606 · 94607 · 94609 · 94610 · 94611 · 94612 · 94613 · 94618 · 94619 · 94621 · 94702 · 94703 · 94704 · 94705 · 94707 · 94708 · 94709 · 94710 · 94720
Boundary zips partially served by other systems are deliberately unlisted — check your exact zip.