What was found in ZIP 90040
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 | 6160 µg/L 62% of the EPA limit 10000 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 436000 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2018 | 4/4 | SYR4 |
| Nitrate | 6200 µg/L 62% of the EPA limit 10000 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 4/4 | SYR4 |
| Fluoride | 870 µg/L 22% of the EPA limit 4000 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 933 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2018 | 4/4 | SYR4 |
| Barium | 160 µg/L 8% of the EPA limit 2000 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 2/4 | SYR4 |
| Copper | 68.371 µg/L 5.3% of the EPA limit 1300 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 2/4 | SYR4 |
| Lithium | 47.1 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
Highest in the ZIP: 65.7 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 4/4 | UCMR-5 |
| TTHM | 53.305 µg/L 67% of the EPA limit 80 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 57.12 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Tetrachloroethylene | 4.65 µg/L 93% of the EPA limit 5 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 31.679 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 3/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26 µg/L 43% of the EPA limit 60 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 26.3 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Chloroform | 17.5215 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 22.3 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Trichloroethylene | 6.6235 µg/L 132% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 21.0645 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 3/4 | SYR4 |
| Dibromochloromethane | 18.15 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 17.078 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 13 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 4/4 | SYR4 |
| Chromium | 11.6063 µg/L 12% of the EPA limit 100 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 1/4 | SYR4 |
| Bromoform | 6.5205 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 10.12 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 4/4 | SYR4 |
| Arsenic | 8.24 µg/L 82% of the EPA limit 10 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 3/4 | SYR4 |
| Trichloroacetic Acid | 7.63 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 8.115 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 2.5 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 7.34 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 6.935 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 7.22 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 4/4 | SYR4 |
| Combined Uranium | 6.81049 µg/L 23% of the EPA limit 30 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 3/4 | SYR4 |
| Monobromoacetic Acid | 1.6 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 6.8 µg/L — SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 · 7,330 people · 2019 | 3/4 | SYR4 |
| Lead | 6.6152 µg/L 44% of the EPA limit 15 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 1/4 | SYR4 |
| Selenium | 4.1556 µg/L 8.3% of the EPA limit 50 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 2/4 | SYR4 |
| 1,1-Dichloroethylene | 2.432 µg/L 35% of the EPA limit 7 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 3.793 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 3/4 | SYR4 |
| Xylenes, Total | 3 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 2.47 pCi/L 49% of the EPA limit 5 pCi/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2018 | 1/4 | SYR4 |
| Dichloromethane | 0.6900 µg/L 14% of the EPA limit 5 µg/L Highest in the ZIP: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 1/4 | SYR4 |
| 1,1,2-Trichloroethane | 0.5100 µg/L 10% of the EPA limit 5 µg/L Highest in the ZIP: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2019 | 1/4 | SYR4 |
| Ethylbenzene | 0.5000 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 1/4 | SYR4 |
| Antimony, Total | 0.0790 µg/L 1.3% of the EPA limit 6 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 1/4 | SYR4 |
| Pfpea | 0.0129 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
Highest in the ZIP: 0.0174 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 3/4 | UCMR-5 |
| PFOS | 0.0086 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
Highest in the ZIP: 0.0150 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2025 | 2/4 | UCMR-5 |
| Cadmium | 0.0141 µg/L 0.3% of the EPA limit 5 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 1/4 | SYR4 |
| Pfhxa | 0.0076 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
Highest in the ZIP: 0.0136 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 3/4 | UCMR-5 |
| Pfba | 0.0080 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
Highest in the ZIP: 0.0110 µg/L — GSWC - BELL, BELL GARDENS · 55,050 people · 2025 | 3/4 | UCMR-5 |
| PFBS | 0.0049 µg/L No EPA limit set Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
Highest in the ZIP: 0.0097 µg/L — COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 3/4 | UCMR-5 |
| PFOA | 0.0093 µg/L No EPA limit set Highest in the ZIP: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 1/4 | UCMR-5 |
| Pfhpa | 0.0051 µg/L No EPA limit set Highest in the ZIP: COMMERCE-CITY, WATER DEPT. · 4,205 people · 2024 | 1/4 | UCMR-5 |
| Beryllium, Total | 0.0048 µg/L 0.1% of the EPA limit 4 µg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019 | 1/4 | SYR4 |
| PFHXS | 0.0036 µg/L No EPA limit set Highest in the ZIP: GSWC - BELL, BELL GARDENS · 55,050 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2023 | 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 90040
| Supplier | State | Population served |
|---|---|---|
| CALIFORNIA WATER SERVICE CO. - ELA | CA | 152,474 |
| GSWC - BELL, BELL GARDENS | CA | 55,050 |
| SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 | CA | 7,330 |
| COMMERCE-CITY, WATER DEPT. | CA | 4,205 |
Frequently asked questions about ZIP 90040 tap water
Is the tap water in ZIP 90040 safe to drink?
EPA testing detected 42 contaminants across the water suppliers serving ZIP 90040. 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 90040?
4 public water suppliers report EPA drinking-water monitoring for ZIP 90040. Each is listed above with its population served.
What contaminants are in ZIP 90040'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.