What was found in ZIP 90401
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 | 502000 µg/L 5020% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018 | 2/2 | SYR4 |
| Nitrate | 6329.13 µg/L 63% of the EPA limit 10000 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 2/2 | SYR4 |
| Copper | 45.58 µg/L 3.5% of the EPA limit 1300 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018
Highest in the ZIP: 382.55 µg/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/2 | SYR4 |
| Fluoride | 360 µg/L 9% of the EPA limit 4000 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Lead | 1.485 µg/L 9.9% of the EPA limit 15 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018
Highest in the ZIP: 117.19 µg/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/2 | SYR4 |
| Barium | 90.12 µg/L 4.5% of the EPA limit 2000 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018 | 1/2 | SYR4 |
| Combined Uranium | 41.869 µg/L 140% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Lithium | 34.8 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2024 | 1/2 | UCMR-5 |
| TTHM | 33.715 µg/L 42% of the EPA limit 80 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 2/2 | SYR4 |
| Trichloroethylene | 20.03 µg/L 401% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Tetrachloroethylene | 17.54 µg/L 351% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Bromoform | 7.5 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019
Highest in the ZIP: 16.875 µg/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14.5 µg/L 24% of the EPA limit 60 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 13.8 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Selenium | 12.42 µg/L 25% of the EPA limit 50 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018 | 1/2 | SYR4 |
| Bromodichloromethane | 7.235 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 7.05 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 4.6 pCi/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2017
Highest in the ZIP: 5.74 pCi/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 4.9 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 4.9 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 4.5 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.4 pCi/L 29% of the EPA limit 15 pCi/L Highest in the ZIP: KOHALA RANCH WATER CO. · 850 people · 2019 | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 4.2 µg/L 60% of the EPA limit 7 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Toluene | 3.04 µg/L 0.3% of the EPA limit 1000 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Chromium | 2.95 µg/L 3% of the EPA limit 100 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018 | 2/2 | SYR4 |
| Chloroform | 2.8 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| cis-1,2-Dichloroethylene | 2.575 µg/L 3.7% of the EPA limit 70 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.44 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1.3 µg/L 13% of the EPA limit 10 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018 | 1/2 | SYR4 |
| Cadmium | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2018 | 1/2 | SYR4 |
| Carbon Tetrachloride | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2019 | 1/2 | SYR4 |
| Pfpea | 0.0220 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2024 | 1/2 | UCMR-5 |
| Pfhxa | 0.0179 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2025
Highest in the ZIP: 0.0107 mg/L — KOHALA RANCH WATER CO. · 850 people · 2021 | 2/2 | LCR |
| Pfba | 0.0088 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2024 | 1/2 | UCMR-5 |
| Pfhpa | 0.0050 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2024 | 1/2 | UCMR-5 |
| PFOA | 0.0046 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 people · 2024 | 1/2 | UCMR-5 |
| PFBS | 0.0045 µg/L No EPA limit set Main supplier: SANTA MONICA-CITY, WATER DIVISION · 89,947 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 90401
| Supplier | State | Population served |
|---|---|---|
| SANTA MONICA-CITY, WATER DIVISION | CA | 89,947 |
| KOHALA RANCH WATER CO. | HI | 850 |
Frequently asked questions about ZIP 90401 tap water
Is the tap water in ZIP 90401 safe to drink?
EPA testing detected 38 contaminants across the water suppliers serving ZIP 90401. 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 90401?
2 public water suppliers report EPA drinking-water monitoring for ZIP 90401. Each is listed above with its population served.
What contaminants are in ZIP 90401's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Copper, Fluoride, Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.