What was found in ZIP 94538
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 1000000 µg/L 10000% of the EPA limit, in the worst sample — 10000 µg/L | 1/1 | SYR4 |
| Nitrate | 3353.84 µg/L 34% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Fluoride | 1060 µg/L 27% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Barium | 260 µg/L 13% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| TTHM | 97 µg/L 121% of the EPA limit, in the worst sample — 80 µg/L | 1/1 | SYR4 |
| Copper | 81 µg/L 6.2% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Chloroform | 49.13 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromoform | 37.28 µg/L No EPA limit set | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 35 µg/L 58% of the EPA limit 60 µg/L | 1/1 | SYR4 |
| Dibromochloromethane | 31.62 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromodichloromethane | 31 µg/L No EPA limit set | 1/1 | SYR4 |
| Dichloroacetic Acid | 20 µg/L No EPA limit set | 1/1 | SYR4 |
| Trichloroacetic Acid | 15 µg/L No EPA limit set | 1/1 | SYR4 |
| Selenium | 13 µg/L 26% of the EPA limit 50 µg/L | 1/1 | SYR4 |
| Dibromoacetic Acid | 12 µg/L No EPA limit set | 1/1 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L | 1/1 | SYR4 |
| Arsenic | 5.6 µg/L 56% of the EPA limit 10 µg/L | 1/1 | SYR4 |
| Combined Uranium | 3.3 µg/L 11% of the EPA limit 30 µg/L | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.3 µg/L 55% of the EPA limit 6 µg/L | 1/1 | SYR4 |
| Monochloroacetic Acid | 2 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromate | 1.1 µg/L 11% of the EPA limit 10 µg/L | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set | 1/1 | SYR4 |
| Asbestos | 1 MFL 14% of the EPA limit 7 MFL | 1/1 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0320 µg/L 16% of the EPA limit 0.2000 µg/L | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 1/1 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 94538
| Supplier | State | Population served |
|---|---|---|
| ALAMEDA COUNTY WATER DISTRICT | CA | 344,000 |
Frequently asked questions about ZIP 94538 tap water
Is the tap water in ZIP 94538 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 94538. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 94538?
1 public water supplier report EPA drinking-water monitoring for ZIP 94538. Each is listed above with its population served.
What contaminants are in ZIP 94538's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.