What was found in ZIP 90604
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 | 8814 µg/L 88% of the EPA limit 10000 µg/L | 2/4 | SYR4 |
| Nitrate-Nitrite | 8300 µg/L 83% of the EPA limit 10000 µg/L | 1/4 | SYR4 |
| Fluoride | 590 µg/L 15% of the EPA limit 4000 µg/L | 3/4 | SYR4 |
| Barium | 170 µg/L 8.5% of the EPA limit 2000 µg/L | 2/4 | SYR4 |
| Tetrachloroethylene | 88 µg/L 1760% of the EPA limit, in the worst sample — 5 µg/L | 2/4 | SYR4 |
| TTHM | 73 µg/L 91% of the EPA limit 80 µg/L | 4/4 | SYR4 |
| Trichloroethylene | 64 µg/L 1280% of the EPA limit, in the worst sample — 5 µg/L | 2/4 | SYR4 |
| Lithium | 58 µg/L No EPA limit set | 2/4 | UCMR-5 |
| Chloroform | 37 µg/L No EPA limit set | 4/4 | SYR4 |
| 1,1-Dichloroethylene | 36 µg/L 514% of the EPA limit, in the worst sample — 7 µg/L | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 30 µg/L 50% of the EPA limit 60 µg/L | 4/4 | SYR4 |
| Bromoform | 24 µg/L No EPA limit set | 4/4 | SYR4 |
| Dibromochloromethane | 24 µg/L No EPA limit set | 4/4 | SYR4 |
| Bromodichloromethane | 22 µg/L No EPA limit set | 4/4 | SYR4 |
| Trichloroacetic Acid | 16 µg/L No EPA limit set | 3/4 | SYR4 |
| Dichloroacetic Acid | 15 µg/L No EPA limit set | 3/4 | SYR4 |
| Selenium | 15 µg/L 30% of the EPA limit 50 µg/L | 1/4 | SYR4 |
| Combined Uranium | 9.983 µg/L 33% of the EPA limit 30 µg/L | 3/4 | SYR4 |
| Copper | 9 µg/L 0.7% of the EPA limit 1300 µg/L | 1/4 | SYR4 |
| cis-1,2-Dichloroethylene | 8.9 µg/L 13% of the EPA limit 70 µg/L | 2/4 | SYR4 |
| Chromium | 6.5 µg/L 6.5% of the EPA limit 100 µg/L | 1/4 | SYR4 |
| Dibromoacetic Acid | 6.5 µg/L No EPA limit set | 4/4 | SYR4 |
| Monochloroacetic Acid | 6.2 µg/L No EPA limit set | 2/4 | SYR4 |
| Arsenic | 4.9 µg/L 49% of the EPA limit 10 µg/L | 3/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.8 µg/L 63% of the EPA limit 6 µg/L | 1/4 | SYR4 |
| Monobromoacetic Acid | 2.4 µg/L No EPA limit set | 3/4 | SYR4 |
| 1,2-Dichloroethane | 2.3 µg/L 46% of the EPA limit 5 µg/L | 1/4 | SYR4 |
| 1,2-Dichloropropane | 0.8300 µg/L 17% of the EPA limit 5 µg/L | 1/4 | SYR4 |
| Mercury | 0.2100 µg/L 11% of the EPA limit 2 µg/L | 1/4 | SYR4 |
| PFOS | 0.0230 µg/L No EPA limit set | 3/4 | UCMR-5 |
| Pfpea | 0.0150 µg/L No EPA limit set | 4/4 | UCMR-5 |
| Pfhxa | 0.0130 µg/L No EPA limit set | 3/4 | UCMR-5 |
| PFOA | 0.0099 µg/L No EPA limit set | 3/4 | UCMR-5 |
| Pfba | 0.0095 µg/L No EPA limit set | 4/4 | UCMR-5 |
| PFBS | 0.0072 µg/L No EPA limit set | 3/4 | UCMR-5 |
| PFHXS | 0.0040 µg/L No EPA limit set | 2/4 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L | 4/4 | 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 90604
| Supplier | State | Population served |
|---|---|---|
| SUBURBAN WATER SYSTEMS-WHITTIER | CA | 66,045 |
| SUBURBAN WATER SYSTEMS-LA MIRADA | CA | 56,793 |
| GSWC - NORWALK | CA | 43,167 |
| ORCHARD DALE WATER DISTRICT | CA | 25,000 |
Frequently asked questions about ZIP 90604 tap water
Is the tap water in ZIP 90604 safe to drink?
EPA testing detected 37 contaminants across the water suppliers serving ZIP 90604. 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 90604?
4 public water suppliers report EPA drinking-water monitoring for ZIP 90604. Each is listed above with its population served.
What contaminants are in ZIP 90604's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Barium, Tetrachloroethylene, and others across this ZIP's suppliers. The full list with levels and sources is above.