What was found in ZIP 90222
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 | 896500 µg/L 8965% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the ZIP: SUBURBAN WATER SYSTEMS - SATIVA · 4,363 people · 2013 | 2/4 | SYR4 |
| Nitrate | 971.8 µg/L 9.7% of the EPA limit 10000 µg/L Highest in the ZIP: GSWC - WILLOWBROOK · 10,793 people · 2019 | 2/4 | SYR4 |
| Fluoride | 697.5 µg/L 17% of the EPA limit 4000 µg/L Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 4/4 | SYR4 |
| Barium | 120 µg/L 6% of the EPA limit 2000 µg/L Main supplier: GSWC - SOUTHWEST · 277,740 people · 2017 | 2/4 | SYR4 |
| Lithium | 51.3 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2025
Highest in the ZIP: 67.7 µg/L — LIBERTY UTILITIES - COMPTON · 26,371 people · 2023 | 3/4 | UCMR-5 |
| TTHM | 59.25 µg/L 74% of the EPA limit 80 µg/L Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 27.4 µg/L 46% of the EPA limit 60 µg/L Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 3/4 | SYR4 |
| Chloroform | 20 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 3/4 | SYR4 |
| Bromodichloromethane | 18 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 17 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 11 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019
Highest in the ZIP: 16.37 µg/L — GSWC - WILLOWBROOK · 10,793 people · 2019 | 3/4 | SYR4 |
| Bromoform | 9.76 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 8.87 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019
Highest in the ZIP: 9.655 µg/L — GSWC - WILLOWBROOK · 10,793 people · 2019 | 3/4 | SYR4 |
| Combined Uranium | 5.215 µg/L 17% of the EPA limit 30 µg/L Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019
Highest in the ZIP: 8.1056 µg/L — SUBURBAN WATER SYSTEMS - SATIVA · 4,363 people · 2015 | 3/4 | SYR4 |
| Dibromoacetic Acid | 5.71 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 3/4 | SYR4 |
| Monochloroacetic Acid | 5.64 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 1/4 | SYR4 |
| Arsenic | 2.94 µg/L 29% of the EPA limit 10 µg/L Main supplier: GSWC - SOUTHWEST · 277,740 people · 2017 | 2/4 | SYR4 |
| Monobromoacetic Acid | 2.1 µg/L No EPA limit set Main supplier: GSWC - SOUTHWEST · 277,740 people · 2019 | 2/4 | SYR4 |
| Dichloromethane | 1.4 µg/L 28% of the EPA limit 5 µg/L Highest in the ZIP: LIBERTY UTILITIES - COMPTON · 26,371 people · 2019 | 1/4 | SYR4 |
| Mercury | 1.2 µg/L 60% of the EPA limit 2 µg/L Highest in the ZIP: GSWC - WILLOWBROOK · 10,793 people · 2018 | 1/4 | SYR4 |
| Tetrachloroethylene | 1.2 µg/L 24% of the EPA limit 5 µg/L Highest in the ZIP: SUBURBAN WATER SYSTEMS - SATIVA · 4,363 people · 2019 | 2/4 | SYR4 |
| Trichloroethylene | 0.6900 µg/L 14% of the EPA limit 5 µg/L Highest in the ZIP: SUBURBAN WATER SYSTEMS - SATIVA · 4,363 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: GSWC - SOUTHWEST · 277,740 people · 2022 | 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 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 90222
| Supplier | State | Population served |
|---|---|---|
| GSWC - SOUTHWEST | CA | 277,740 |
| LIBERTY UTILITIES - COMPTON | CA | 26,371 |
| GSWC - WILLOWBROOK | CA | 10,793 |
| SUBURBAN WATER SYSTEMS - SATIVA | CA | 4,363 |
Frequently asked questions about ZIP 90222 tap water
Is the tap water in ZIP 90222 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 90222. 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 90222?
4 public water suppliers report EPA drinking-water monitoring for ZIP 90222. Each is listed above with its population served.
What contaminants are in ZIP 90222's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.