What was found in ZIP 94534
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 | 1/3 | SYR4 |
| Nitrate | 1532.28 µg/L 15% of the EPA limit 10000 µg/L | 1/3 | SYR4 |
| Fluoride | 1010 µg/L 25% of the EPA limit 4000 µg/L | 3/3 | SYR4 |
| Chromium | 152 µg/L 152% of the EPA limit, in the worst sample — 100 µg/L | 1/3 | SYR4 |
| Copper | 107 µg/L 8.2% of the EPA limit 1300 µg/L | 2/3 | SYR4 |
| Lead | 83 µg/L 553% of the EPA limit, in the worst sample — 15 µg/L | 1/3 | SYR4 |
| TTHM | 77 µg/L 96% of the EPA limit 80 µg/L | 3/3 | SYR4 |
| Chloroform | 67.7 µg/L No EPA limit set | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 37 µg/L 62% of the EPA limit 60 µg/L | 3/3 | SYR4 |
| Trichloroacetic Acid | 25 µg/L No EPA limit set | 3/3 | SYR4 |
| Dichloroacetic Acid | 18 µg/L No EPA limit set | 3/3 | SYR4 |
| Bromodichloromethane | 13 µg/L No EPA limit set | 3/3 | SYR4 |
| Arsenic | 7 µg/L 70% of the EPA limit 10 µg/L | 3/3 | SYR4 |
| Dibromochloromethane | 4.9 µg/L No EPA limit set | 3/3 | SYR4 |
| Gross Beta Particle Activity | 4.1 pCi/L No EPA limit set | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.8 µg/L 63% of the EPA limit 6 µg/L | 2/3 | SYR4 |
| Combined Uranium | 2.831 µg/L 9.4% of the EPA limit 30 µg/L | 2/3 | SYR4 |
| Monochloroacetic Acid | 2.6 µg/L No EPA limit set | 2/3 | SYR4 |
| Cadmium | 2.3 µg/L 46% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| Bromate | 2 µg/L 20% of the EPA limit 10 µg/L | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.5 µg/L No EPA limit set | 1/3 | SYR4 |
| Trichloroethylene | 0.9700 µg/L 19% of the EPA limit 5 µg/L | 2/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 3/3 | 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 94534
| Supplier | State | Population served |
|---|---|---|
| CITY OF FAIRFIELD | CA | 120,377 |
| SUISUN-SOLANO WATER AUTHORITY | CA | 29,105 |
| CITY OF VALLEJO-LAKES SYSTEM | CA | 2,800 |
Frequently asked questions about ZIP 94534 tap water
Is the tap water in ZIP 94534 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 94534. 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 94534?
3 public water suppliers report EPA drinking-water monitoring for ZIP 94534. Each is listed above with its population served.
What contaminants are in ZIP 94534's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Chromium, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.