What was found in ZIP 94550
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 | 10190 µg/L 102% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Nitrate | 8967.2 µg/L 90% of the EPA limit 10000 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Barium | 340 µg/L 17% of the EPA limit 2000 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Fluoride | 173.5 µg/L 4.3% of the EPA limit 4000 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Copper | 56.688 µg/L 4.4% of the EPA limit 1300 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| TTHM | 38.5 µg/L 48% of the EPA limit 80 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Lithium | 25.1 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 18 µg/L 30% of the EPA limit 60 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Chromium | 17.4951 µg/L 17% of the EPA limit 100 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 14.098 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 13.898 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Chloroform | 13.67 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Bromoform | 11.837 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 9.5 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Tetrachloroethylene | 6.322 µg/L 126% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 6.07 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 5.855 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 2.62 pCi/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 2.4 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1.3638 µg/L 14% of the EPA limit 10 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 1.06922 µg/L 3.6% of the EPA limit 30 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Selenium | 1.0466 µg/L 2.1% of the EPA limit 50 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Lead | 0.7154 µg/L 4.8% of the EPA limit 15 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 0.0634 µg/L 1.1% of the EPA limit 6 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Cadmium | 0.0127 µg/L 0.3% of the EPA limit 5 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| PFOS | 0.0120 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 1/2 | UCMR-5 |
| PFHXS | 0.0098 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0075 mg/L 50% of the EPA limit 0.0150 mg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 2/2 | LCR |
| PFOA | 0.0048 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 1/2 | UCMR-5 |
| PFBS | 0.0042 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 1/2 | UCMR-5 |
| Beryllium, Total | 0.0040 µg/L 0.1% of the EPA limit 4 µg/L Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2019 | 1/2 | SYR4 |
| Pfhxa | 0.0039 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0036 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE - LIVERMORE · 60,414 people · 2024 | 1/2 | UCMR-5 |
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 94550
| Supplier | State | Population served |
|---|---|---|
| CALIFORNIA WATER SERVICE - LIVERMORE | CA | 60,414 |
| CITY OF LIVERMORE | CA | 38,892 |
Frequently asked questions about ZIP 94550 tap water
Is the tap water in ZIP 94550 safe to drink?
EPA testing detected 34 contaminants across the water suppliers serving ZIP 94550. 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 94550?
2 public water suppliers report EPA drinking-water monitoring for ZIP 94550. Each is listed above with its population served.
What contaminants are in ZIP 94550's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Barium, Fluoride, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.