What was found in ZIP 90280
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-Nitrite | 458000 µg/L 4580% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2013
Highest in the ZIP: 730000 µg/L — LYNWOOD-CITY, WATER DEPT. · 66,967 people · 2012 | 5/6 | SYR4 |
| Nitrate | 2079.2 µg/L 21% of the EPA limit 10000 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 7235 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 6/6 | SYR4 |
| Fluoride | 375.5 µg/L 9.4% of the EPA limit 4000 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 526 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 6/6 | SYR4 |
| Barium | 202 µg/L 10% of the EPA limit 2000 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 252.5 µg/L — GSWC - HOLLYDALE · 8,099 people · 2018 | 5/6 | SYR4 |
| Copper | 2.7 µg/L 0.2% of the EPA limit 1300 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 210 µg/L — LYNWOOD-CITY, WATER DEPT. · 66,967 people · 2019 | 5/6 | SYR4 |
| Lithium | 49 µg/L No EPA limit set Highest in the ZIP: LYNWOOD-CITY, WATER DEPT. · 66,967 people · 2025 | 3/6 | UCMR-5 |
| TTHM | 10.868 µg/L 14% of the EPA limit 80 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 48 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 6/6 | SYR4 |
| Trichloroethylene | 4.905 µg/L 98% of the EPA limit 5 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 39 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 4/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 28.124 µg/L 47% of the EPA limit 60 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019 | 6/6 | SYR4 |
| Arsenic | 2.8 µg/L 28% of the EPA limit 10 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 18 µg/L — GSWC - HOLLYDALE · 8,099 people · 2018 | 4/6 | SYR4 |
| Chloroform | 0.2000 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 17.4 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 5/6 | SYR4 |
| Dibromochloromethane | 4.43 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 16.35 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 6/6 | SYR4 |
| Bromodichloromethane | 2.05 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 15.65 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 6/6 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 12 µg/L — LYNWOOD-CITY, WATER DEPT. · 66,967 people · 2019 | 3/6 | SYR4 |
| Combined Uranium | 5.68435 µg/L 19% of the EPA limit 30 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 11.6518 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2018 | 6/6 | SYR4 |
| Dichloroacetic Acid | 1 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 10.35 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 4/6 | SYR4 |
| Bromoform | 5.545 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 10.12 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 6/6 | SYR4 |
| Tetrachloroethylene | 7.128 µg/L 143% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 8.7 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 4/6 | SYR4 |
| Lead | 8.23 µg/L 55% of the EPA limit 15 µg/L Highest in the ZIP: GSWC - FLORENCE/GRAHAM · 63,472 people · 2018 | 1/6 | SYR4 |
| Selenium | 7.56 µg/L 15% of the EPA limit 50 µg/L Highest in the ZIP: GSWC - FLORENCE/GRAHAM · 63,472 people · 2018 | 2/6 | SYR4 |
| Monochloroacetic Acid | 1 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 7.34 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 4/6 | SYR4 |
| Trichloroacetic Acid | 1.425 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 7.24 µg/L — GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 4/6 | SYR4 |
| Dibromoacetic Acid | 1.714 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 4.725 µg/L — LYNWOOD-CITY, WATER DEPT. · 66,967 people · 2019 | 6/6 | SYR4 |
| Monobromoacetic Acid | 1.319 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 4.47 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 4/6 | SYR4 |
| cis-1,2-Dichloroethylene | 4.39 µg/L 6.3% of the EPA limit 70 µg/L Highest in the ZIP: GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 1/6 | SYR4 |
| Gross Beta Particle Activity | 3.8 pCi/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2015 | 1/6 | SYR4 |
| Carbon Tetrachloride | 2.77 µg/L 55% of the EPA limit 5 µg/L Highest in the ZIP: GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 1/6 | SYR4 |
| 1,2-Dichloroethane | 2.1 µg/L 42% of the EPA limit 5 µg/L Highest in the ZIP: GSWC - FLORENCE/GRAHAM · 63,472 people · 2019 | 1/6 | SYR4 |
| 1,1-Dichloroethylene | 0.7350 µg/L 11% of the EPA limit 7 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019
Highest in the ZIP: 1.4 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 3/6 | SYR4 |
| Dichloromethane | 1 µg/L 20% of the EPA limit 5 µg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2019 | 1/6 | SYR4 |
| PFOS | 0.0260 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2024 | 3/6 | UCMR-5 |
| Pfba | 0.0110 µg/L No EPA limit set Highest in the ZIP: GSWC - BELL, BELL GARDENS · 55,050 people · 2025 | 2/6 | UCMR-5 |
| PFOA | 0.0100 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2024 | 2/6 | UCMR-5 |
| Pfpea | 0.0063 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2024
Highest in the ZIP: 0.0073 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2025 | 3/6 | UCMR-5 |
| Pfhxa | 0.0061 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2024
Highest in the ZIP: 0.0066 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2025 | 2/6 | UCMR-5 |
| PFHXS | 0.0060 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2024
Highest in the ZIP: 0.0061 µg/L — LYNWOOD-CITY, WATER DEPT. · 66,967 people · 2025 | 3/6 | UCMR-5 |
| PFBS | 0.0039 µg/L No EPA limit set Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2024
Highest in the ZIP: 0.0041 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2025 | 2/6 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SOUTH GATE-CITY, WATER DEPT. · 76,443 people · 2024 | 6/6 | 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 90280
| Supplier | State | Population served |
|---|---|---|
| SOUTH GATE-CITY, WATER DEPT. | CA | 76,443 |
| LYNWOOD-CITY, WATER DEPT. | CA | 66,967 |
| GSWC - FLORENCE/GRAHAM | CA | 63,472 |
| GSWC - BELL, BELL GARDENS | CA | 55,050 |
| WALNUT PARK MUTUAL WATER CO. | CA | 16,180 |
| GSWC - HOLLYDALE | CA | 8,099 |
Frequently asked questions about ZIP 90280 tap water
Is the tap water in ZIP 90280 safe to drink?
EPA testing detected 38 contaminants across the water suppliers serving ZIP 90280. 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 90280?
6 public water suppliers report EPA drinking-water monitoring for ZIP 90280. Each is listed above with its population served.
What contaminants are in ZIP 90280's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.