What was found in ZIP 90278
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 |
|---|---|---|---|
| Fluoride | 1010 µg/L 25% of the EPA limit 4000 µg/L | 3/3 | SYR4 |
| Nitrate | 730 µg/L 7.3% of the EPA limit 10000 µg/L | 1/3 | SYR4 |
| Nitrate-Nitrite | 730 µg/L 7.3% of the EPA limit 10000 µg/L | 1/3 | SYR4 |
| Barium | 280 µg/L 14% of the EPA limit 2000 µg/L | 2/3 | SYR4 |
| TTHM | 121.83 µg/L 152% of the EPA limit, in the worst sample — 80 µg/L | 3/3 | SYR4 |
| Lithium | 62.5 µg/L No EPA limit set | 3/3 | UCMR-5 |
| Dibromochloromethane | 45 µg/L No EPA limit set | 3/3 | SYR4 |
| Copper | 44.57 µg/L 3.4% of the EPA limit 1300 µg/L | 2/3 | SYR4 |
| Chloroform | 40 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 |
| Bromoform | 36.5 µg/L No EPA limit set | 3/3 | SYR4 |
| Bromodichloromethane | 30 µg/L No EPA limit set | 3/3 | SYR4 |
| Dichloroacetic Acid | 18 µg/L No EPA limit set | 3/3 | SYR4 |
| Combined Uranium | 17.88 µg/L 60% of the EPA limit 30 µg/L | 2/3 | SYR4 |
| Trichloroacetic Acid | 17 µg/L No EPA limit set | 3/3 | SYR4 |
| Dibromoacetic Acid | 12 µg/L No EPA limit set | 3/3 | SYR4 |
| Gross Beta Particle Activity | 10 pCi/L No EPA limit set | 1/3 | SYR4 |
| Selenium | 9.7 µg/L 19% of the EPA limit 50 µg/L | 2/3 | SYR4 |
| Monochloroacetic Acid | 6.8 µg/L No EPA limit set | 3/3 | SYR4 |
| Arsenic | 3.2 µg/L 32% of the EPA limit 10 µg/L | 2/3 | SYR4 |
| Monobromoacetic Acid | 3.1 µg/L No EPA limit set | 3/3 | SYR4 |
| Chromium | 1.14 µg/L 1.1% of the EPA limit 100 µg/L | 1/3 | SYR4 |
| Lead | 0.7370 µg/L 4.9% of the EPA limit 15 µg/L | 1/3 | SYR4 |
| Antimony, Total | 0.0360 µg/L 0.6% of the EPA limit 6 µg/L | 1/3 | SYR4 |
| Cadmium | 0.0070 µg/L 0.1% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| Beryllium, Total | 0.0020 µg/L 0.1% of the EPA limit 4 µg/L | 1/3 | SYR4 |
| Lead | 0.0014 mg/L 9.3% 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 90278
| Supplier | State | Population served |
|---|---|---|
| GSWC - SOUTHWEST | CA | 277,740 |
| CALIFORNIA WATER SERVICE CO. - HERM/REDO | CA | 96,853 |
| HAWTHORNE-CITY WATER DEPT. | CA | 44,718 |
Frequently asked questions about ZIP 90278 tap water
Is the tap water in ZIP 90278 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 90278. 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 90278?
3 public water suppliers report EPA drinking-water monitoring for ZIP 90278. Each is listed above with its population served.
What contaminants are in ZIP 90278's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.