What was found in ZIP 90755
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 |
|---|---|---|---|
| Fluoride | 573 µg/L 14% of the EPA limit 4000 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Barium | 148.5 µg/L 7.4% of the EPA limit 2000 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Lithium | 58 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2024 | 1/1 | UCMR-5 |
| TTHM | 32.725 µg/L 41% of the EPA limit 80 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 20.65 µg/L 34% of the EPA limit 60 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Chloroform | 14 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Benzene | 13.15 µg/L 263% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Arsenic | 13 µg/L 130% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 12.14 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 10 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 9.3675 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 9.095 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 6.268 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 5.51 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Bromoform | 3.945 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.7 µg/L No EPA limit set Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Ethylbenzene | 0.6000 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Xylenes, Total | 0.5200 µg/L 0% of the EPA limit 10000 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Nitrite | 0.2200 µg/L 0% of the EPA limit 1000 µg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0029 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: SIGNAL HILL - CITY, WATER DEPT. · 11,848 people · 2026 | 1/1 | 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 90755
| Supplier | State | Population served |
|---|---|---|
| SIGNAL HILL - CITY, WATER DEPT. | CA | 11,848 |
Frequently asked questions about ZIP 90755 tap water
Is the tap water in ZIP 90755 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 90755. 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 90755?
1 public water supplier report EPA drinking-water monitoring for ZIP 90755. Each is listed above with its population served.
What contaminants are in ZIP 90755's water?
EPA monitoring detected Fluoride, Barium, Lithium, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.