What was found in ZIP 94534
The level at this ZIP's main supplier, the highest level anywhere in it, 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, at the 95th percentile of samples — 10000 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 1/3 | SYR4 |
| Nitrate | 1511.94 µg/L 15% of the EPA limit 10000 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 1/3 | SYR4 |
| Fluoride | 965 µg/L 24% of the EPA limit 4000 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 3/3 | SYR4 |
| Chromium | 131.75 µg/L 132% of the EPA limit, at the 95th percentile of samples — 100 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 1/3 | SYR4 |
| Copper | 101.9 µg/L 7.8% of the EPA limit 1300 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 2/3 | SYR4 |
| TTHM | 59.45 µg/L 74% of the EPA limit 80 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019
Highest in the ZIP: 71.053 µg/L — CITY OF VALLEJO-LAKES SYSTEM · 2,800 people · 2019 | 3/3 | SYR4 |
| Chloroform | 47 µg/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019
Highest in the ZIP: 66.7595 µg/L — CITY OF VALLEJO-LAKES SYSTEM · 2,800 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 20 µg/L 33% of the EPA limit 60 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019
Highest in the ZIP: 35.5 µg/L — SUISUN-SOLANO WATER AUTHORITY · 29,105 people · 2019 | 3/3 | SYR4 |
| Lead | 28.215 µg/L 188% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 1/3 | SYR4 |
| Trichloroacetic Acid | 8.87 µg/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019
Highest in the ZIP: 22 µg/L — SUISUN-SOLANO WATER AUTHORITY · 29,105 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 11 µg/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019
Highest in the ZIP: 15.75 µg/L — SUISUN-SOLANO WATER AUTHORITY · 29,105 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 11.65 µg/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 3/3 | SYR4 |
| Arsenic | 3.995 µg/L 40% of the EPA limit 10 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019
Highest in the ZIP: 4.91 µg/L — CITY OF VALLEJO-LAKES SYSTEM · 2,800 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 4.49 µg/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 4.1 pCi/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2018 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.8 µg/L 63% of the EPA limit 6 µg/L Highest in the ZIP: SUISUN-SOLANO WATER AUTHORITY · 29,105 people · 2017 | 2/3 | SYR4 |
| Combined Uranium | 2.831 µg/L 9.4% of the EPA limit 30 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 2.19 µg/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019
Highest in the ZIP: 2.6 µg/L — SUISUN-SOLANO WATER AUTHORITY · 29,105 people · 2019 | 2/3 | SYR4 |
| Cadmium | 2.24 µg/L 45% of the EPA limit 5 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 1/3 | SYR4 |
| Bromate | 1.98 µg/L 20% of the EPA limit 10 µg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.38 µg/L No EPA limit set Main supplier: CITY OF FAIRFIELD · 120,377 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 0.9700 µg/L 19% of the EPA limit 5 µg/L Highest in the ZIP: SUISUN-SOLANO WATER AUTHORITY · 29,105 people · 2019 | 2/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF FAIRFIELD · 120,377 people · 2023 | 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 95th percentile of the
system's samples — 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.