What was found in ZIP 90603
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 | 4746 µg/L 47% of the EPA limit 10000 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Fluoride | 310.5 µg/L 7.8% of the EPA limit 4000 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2018 | 1/1 | SYR4 |
| Barium | 110 µg/L 5.5% of the EPA limit 2000 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2018 | 1/1 | SYR4 |
| TTHM | 19 µg/L 24% of the EPA limit 80 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 7.86 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Bromoform | 6.85 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.76 µg/L 63% of the EPA limit 6 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 3.7 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 3.6 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 3.2482 µg/L 11% of the EPA limit 30 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.155 µg/L 5.3% of the EPA limit 60 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 3.1 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Arsenic | 2.3 µg/L 23% of the EPA limit 10 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2018 | 1/1 | SYR4 |
| Chloroform | 1.5 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| cis-1,2-Dichloroethylene | 1.31 µg/L 1.9% of the EPA limit 70 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Tetrachloroethylene | 1.11 µg/L 22% of the EPA limit 5 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| Trichloroethylene | 0.7060 µg/L 14% of the EPA limit 5 µg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2019 | 1/1 | SYR4 |
| PFOS | 0.0130 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2024 | 1/1 | UCMR-5 |
| Pfba | 0.0086 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2024 | 1/1 | UCMR-5 |
| PFOA | 0.0063 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2024 | 1/1 | UCMR-5 |
| Pfpea | 0.0040 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2024 | 1/1 | UCMR-5 |
| PFBS | 0.0039 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0030 µg/L No EPA limit set Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SUBURBAN WATER SYSTEMS-WHITTIER · 66,045 people · 2025 | 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 90603
| Supplier | State | Population served |
|---|---|---|
| SUBURBAN WATER SYSTEMS-WHITTIER | CA | 66,045 |
Frequently asked questions about ZIP 90603 tap water
Is the tap water in ZIP 90603 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 90603. 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 90603?
1 public water supplier report EPA drinking-water monitoring for ZIP 90603. Each is listed above with its population served.
What contaminants are in ZIP 90603's water?
EPA monitoring detected Nitrate, Fluoride, Barium, TTHM, Dibromochloromethane, and others across this ZIP's suppliers. The full list with levels and sources is above.