What was found in ZIP 90255
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 |
|---|---|---|---|
| Nitrate-Nitrite | 1000000 µg/L 10000% of the EPA limit, in the worst sample — 10000 µg/L | 4/5 | SYR4 |
| Nitrate | 12430 µg/L 124% of the EPA limit, in the worst sample — 10000 µg/L | 5/5 | SYR4 |
| Fluoride | 700 µg/L 18% of the EPA limit 4000 µg/L | 5/5 | SYR4 |
| Barium | 190 µg/L 9.5% of the EPA limit 2000 µg/L | 4/5 | SYR4 |
| Trichloroethylene | 84 µg/L 1680% of the EPA limit, in the worst sample — 5 µg/L | 3/5 | SYR4 |
| Copper | 76 µg/L 5.8% of the EPA limit 1300 µg/L | 2/5 | SYR4 |
| TTHM | 72.8 µg/L 91% of the EPA limit 80 µg/L | 5/5 | SYR4 |
| Tetrachloroethylene | 55 µg/L 1100% of the EPA limit, in the worst sample — 5 µg/L | 3/5 | SYR4 |
| Lithium | 54 µg/L No EPA limit set | 4/5 | UCMR-5 |
| Dibromochloromethane | 30.4 µg/L No EPA limit set | 5/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26.8 µg/L 45% of the EPA limit 60 µg/L | 5/5 | SYR4 |
| Bromoform | 26 µg/L No EPA limit set | 5/5 | SYR4 |
| Bromodichloromethane | 22.9 µg/L No EPA limit set | 5/5 | SYR4 |
| Chloroform | 22 µg/L No EPA limit set | 5/5 | SYR4 |
| Dichloroacetic Acid | 16.6 µg/L No EPA limit set | 4/5 | SYR4 |
| Combined Uranium | 14.9 µg/L 50% of the EPA limit 30 µg/L | 5/5 | SYR4 |
| Dibromoacetic Acid | 9.8 µg/L No EPA limit set | 5/5 | SYR4 |
| Lead | 8.4 µg/L 56% of the EPA limit 15 µg/L | 1/5 | SYR4 |
| Selenium | 8.1 µg/L 16% of the EPA limit 50 µg/L | 3/5 | SYR4 |
| Monochloroacetic Acid | 7.5 µg/L No EPA limit set | 3/5 | SYR4 |
| Trichloroacetic Acid | 7.4 µg/L No EPA limit set | 4/5 | SYR4 |
| cis-1,2-Dichloroethylene | 7.3 µg/L 10% of the EPA limit 70 µg/L | 1/5 | SYR4 |
| Monobromoacetic Acid | 4.8 µg/L No EPA limit set | 3/5 | SYR4 |
| Carbon Tetrachloride | 4 µg/L 80% of the EPA limit 5 µg/L | 2/5 | SYR4 |
| 1,1-Dichloroethylene | 3.8 µg/L 54% of the EPA limit 7 µg/L | 1/5 | SYR4 |
| Arsenic | 2.9 µg/L 29% of the EPA limit 10 µg/L | 2/5 | SYR4 |
| 1,2-Dichloroethane | 2.5 µg/L 50% of the EPA limit 5 µg/L | 1/5 | SYR4 |
| Chromium | 2.5 µg/L 2.5% of the EPA limit 100 µg/L | 1/5 | SYR4 |
| PFOS | 0.0230 µg/L No EPA limit set | 3/5 | UCMR-5 |
| Pfba | 0.0110 µg/L No EPA limit set | 1/5 | UCMR-5 |
| Pfpea | 0.0073 µg/L No EPA limit set | 1/5 | UCMR-5 |
| Pfhxa | 0.0066 µg/L No EPA limit set | 1/5 | UCMR-5 |
| PFHXS | 0.0051 µg/L No EPA limit set | 2/5 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set | 1/5 | UCMR-5 |
| PFBS | 0.0041 µg/L No EPA limit set | 1/5 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 5/5 | 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 90255
| Supplier | State | Population served |
|---|---|---|
| GSWC - FLORENCE/GRAHAM | CA | 63,472 |
| GSWC - BELL, BELL GARDENS | CA | 55,050 |
| WALNUT PARK MUTUAL WATER CO. | CA | 16,180 |
| HUNTINGTON PARK-CITY, WATER DEPT. | CA | 15,437 |
| MAYWOOD MUTUAL WATER CO. #1 | CA | 5,500 |
Frequently asked questions about ZIP 90255 tap water
Is the tap water in ZIP 90255 safe to drink?
EPA testing detected 36 contaminants across the water suppliers serving ZIP 90255. 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 90255?
5 public water suppliers report EPA drinking-water monitoring for ZIP 90255. Each is listed above with its population served.
What contaminants are in ZIP 90255's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, Trichloroethylene, and others across this ZIP's suppliers. The full list with levels and sources is above.