What was found in ZIP 90620
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 | 578 µg/L 14% of the EPA limit 4000 µg/L Highest in the ZIP: SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2018 | 1/2 | SYR4 |
| TTHM | 48.29 µg/L 60% of the EPA limit 80 µg/L Main supplier: CITY OF BUENA PARK · 81,998 people · 2019
Highest in the ZIP: 67.85 µg/L — SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2019 | 2/2 | SYR4 |
| Lithium | 36.5167 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2025 | 2/2 | UCMR-5 |
| Chloroform | 15.08 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019
Highest in the ZIP: 26 µg/L — SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 14.52 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019
Highest in the ZIP: 20 µg/L — SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 15.535 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019
Highest in the ZIP: 18 µg/L — SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16.69 µg/L 28% of the EPA limit 60 µg/L Main supplier: CITY OF BUENA PARK · 81,998 people · 2019
Highest in the ZIP: 18 µg/L — SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2019 | 2/2 | SYR4 |
| Bromoform | 9.155 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 5.78 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019
Highest in the ZIP: 8.1 µg/L — SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 7.69 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 5.595 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019 | 2/2 | SYR4 |
| Arsenic | 4.74 µg/L 47% of the EPA limit 10 µg/L Highest in the ZIP: SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2018 | 1/2 | SYR4 |
| Combined Uranium | 3.86655 µg/L 13% of the EPA limit 30 µg/L Highest in the ZIP: SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2018 | 1/2 | SYR4 |
| Monochloroacetic Acid | 2.285 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019 | 1/2 | SYR4 |
| PFOS | 0.0068 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2025
Highest in the ZIP: 0.0160 µg/L — SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2025 | 2/2 | UCMR-5 |
| Pfba | 0.0095 µg/L No EPA limit set Highest in the ZIP: SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2025 | 1/2 | UCMR-5 |
| PFOA | 0.0070 µg/L No EPA limit set Highest in the ZIP: SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0042 µg/L No EPA limit set Highest in the ZIP: SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2025 | 1/2 | UCMR-5 |
| PFHXS | 0.0039 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2025 | 2/2 | UCMR-5 |
| Pfpea | 0.0035 µg/L No EPA limit set Highest in the ZIP: SUBURBAN WATER SYSTEMS-LA MIRADA · 56,793 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF BUENA PARK · 81,998 people · 2024 | 2/2 | 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 90620
| Supplier | State | Population served |
|---|---|---|
| CITY OF BUENA PARK | CA | 81,998 |
| SUBURBAN WATER SYSTEMS-LA MIRADA | CA | 56,793 |
Frequently asked questions about ZIP 90620 tap water
Is the tap water in ZIP 90620 safe to drink?
EPA testing detected 22 contaminants across the water suppliers serving ZIP 90620. 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 90620?
2 public water suppliers report EPA drinking-water monitoring for ZIP 90620. Each is listed above with its population served.
What contaminants are in ZIP 90620's water?
EPA monitoring detected Fluoride, TTHM, Lithium, Chloroform, Bromodichloromethane, and others across this ZIP's suppliers. The full list with levels and sources is above.