What was found in ZIP 94566
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 | 16850 µg/L 169% of the EPA limit, in the worst sample — 10000 µg/L | 3/3 | SYR4 |
| Nitrate-Nitrite | 11000 µg/L 110% of the EPA limit, in the worst sample — 10000 µg/L | 2/3 | SYR4 |
| Copper | 399 µg/L 31% of the EPA limit 1300 µg/L | 2/3 | SYR4 |
| Barium | 370 µg/L 19% of the EPA limit 2000 µg/L | 2/3 | SYR4 |
| Fluoride | 210 µg/L 5.3% of the EPA limit 4000 µg/L | 2/3 | SYR4 |
| Lead | 123 µg/L 820% of the EPA limit, in the worst sample — 15 µg/L | 2/3 | SYR4 |
| TTHM | 58.45 µg/L 73% of the EPA limit 80 µg/L | 3/3 | SYR4 |
| Glyphosate | 50 µg/L 7.1% of the EPA limit 700 µg/L | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26.6 µg/L 44% of the EPA limit 60 µg/L | 2/3 | SYR4 |
| Lithium | 25.1 µg/L No EPA limit set | 2/3 | UCMR-5 |
| Chromium | 24.942 µg/L 25% of the EPA limit 100 µg/L | 2/3 | SYR4 |
| Dibromochloromethane | 23.7 µg/L No EPA limit set | 2/3 | SYR4 |
| Bromoform | 23.26 µg/L No EPA limit set | 3/3 | SYR4 |
| Chloroform | 20.73 µg/L No EPA limit set | 2/3 | SYR4 |
| Bromodichloromethane | 15.46 µg/L No EPA limit set | 2/3 | SYR4 |
| Dibromoacetic Acid | 13.7 µg/L No EPA limit set | 2/3 | SYR4 |
| Dichloroacetic Acid | 12.4 µg/L No EPA limit set | 2/3 | SYR4 |
| Trichloroacetic Acid | 12.3 µg/L No EPA limit set | 2/3 | SYR4 |
| Tetrachloroethylene | 7.9 µg/L 158% of the EPA limit, in the worst sample — 5 µg/L | 1/3 | SYR4 |
| Gross Beta Particle Activity | 5.8 pCi/L No EPA limit set | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.4 pCi/L 29% of the EPA limit 15 pCi/L | 1/3 | SYR4 |
| Combined Uranium | 2.831 µg/L 9.4% of the EPA limit 30 µg/L | 2/3 | SYR4 |
| Monochloroacetic Acid | 2.4 µg/L No EPA limit set | 1/3 | SYR4 |
| Monobromoacetic Acid | 2 µg/L No EPA limit set | 2/3 | SYR4 |
| Arsenic | 1.517 µg/L 15% of the EPA limit 10 µg/L | 1/3 | SYR4 |
| Selenium | 1.187 µg/L 2.4% of the EPA limit 50 µg/L | 1/3 | SYR4 |
| Antimony, Total | 0.0650 µg/L 1.1% of the EPA limit 6 µg/L | 1/3 | SYR4 |
| PFOS | 0.0260 µg/L No EPA limit set | 2/3 | UCMR-5 |
| PFHXS | 0.0220 µg/L No EPA limit set | 2/3 | UCMR-5 |
| Cadmium | 0.0130 µg/L 0.3% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| Lead | 0.0107 mg/L 72% of the EPA limit 0.0150 mg/L | 3/3 | LCR |
| Pfba | 0.0063 µg/L No EPA limit set | 1/3 | UCMR-5 |
| PFBS | 0.0061 µg/L No EPA limit set | 2/3 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set | 2/3 | UCMR-5 |
| Pfpes | 0.0043 µg/L No EPA limit set | 1/3 | UCMR-5 |
| Pfhxa | 0.0041 µg/L No EPA limit set | 2/3 | UCMR-5 |
| Pfpea | 0.0041 µg/L No EPA limit set | 2/3 | UCMR-5 |
| Beryllium, Total | 0.0040 µg/L 0.1% of the EPA limit 4 µg/L | 1/3 | SYR4 |
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 94566
| Supplier | State | Population served |
|---|---|---|
| CITY OF PLEASANTON | CA | 76,689 |
| CALIFORNIA WATER SERVICE - LIVERMORE | CA | 60,414 |
| KOHALA RANCH WATER CO. | HI | 850 |
Frequently asked questions about ZIP 94566 tap water
Is the tap water in ZIP 94566 safe to drink?
EPA testing detected 38 contaminants across the water suppliers serving ZIP 94566. 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 94566?
3 public water suppliers report EPA drinking-water monitoring for ZIP 94566. Each is listed above with its population served.
What contaminants are in ZIP 94566's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Copper, Barium, Fluoride, and others across this ZIP's suppliers. The full list with levels and sources is above.