What was found in ZIP 93203
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 960000 µg/L 9600% of the EPA limit, in the worst sample — 10000 µg/L | 2/2 | SYR4 |
| Nitrate | 23000 µg/L 230% of the EPA limit, in the worst sample — 10000 µg/L | 2/2 | SYR4 |
| Fluoride | 700 µg/L 18% of the EPA limit 4000 µg/L | 2/2 | SYR4 |
| Copper | 210 µg/L 16% of the EPA limit 1300 µg/L | 2/2 | SYR4 |
| Barium | 180 µg/L 9% of the EPA limit 2000 µg/L | 2/2 | SYR4 |
| TTHM | 140 µg/L 175% of the EPA limit, in the worst sample — 80 µg/L | 2/2 | SYR4 |
| Nitrite | 110 µg/L 11% of the EPA limit 1000 µg/L | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 100 µg/L 167% of the EPA limit, in the worst sample — 60 µg/L | 2/2 | SYR4 |
| Trichloroacetic Acid | 100 µg/L No EPA limit set | 2/2 | SYR4 |
| Arsenic | 81 µg/L 810% of the EPA limit, in the worst sample — 10 µg/L | 2/2 | SYR4 |
| Dibromochloromethane | 60 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromoform | 50 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromodichloromethane | 26.72 µg/L No EPA limit set | 2/2 | SYR4 |
| Dibromoacetic Acid | 23 µg/L No EPA limit set | 2/2 | SYR4 |
| Chloroform | 19.73 µg/L No EPA limit set | 1/2 | SYR4 |
| Dichloroacetic Acid | 11 µg/L No EPA limit set | 2/2 | SYR4 |
| Selenium | 11 µg/L 22% of the EPA limit 50 µg/L | 2/2 | SYR4 |
| Cyanide | 7.4 µg/L 3.7% of the EPA limit 200 µg/L | 1/2 | SYR4 |
| Tetrachloroethylene | 4.2 µg/L 84% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| Chromium | 3.715 µg/L 3.7% of the EPA limit 100 µg/L | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.4 µg/L 57% of the EPA limit 6 µg/L | 1/2 | SYR4 |
| Lead | 2.9 µg/L 19% of the EPA limit 15 µg/L | 2/2 | SYR4 |
| Monobromoacetic Acid | 2.5 µg/L No EPA limit set | 1/2 | SYR4 |
| Benzene | 0.6500 µg/L 13% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| Styrene | 0.6300 µg/L 0.6% of the EPA limit 100 µg/L | 1/2 | SYR4 |
| Ethylbenzene | 0.6000 µg/L 0.1% of the EPA limit 700 µg/L | 1/2 | SYR4 |
| Combined Uranium | 0.4604 µg/L 1.5% of the EPA limit 30 µg/L | 1/2 | SYR4 |
| Mercury | 0.2400 µg/L 12% of the EPA limit 2 µg/L | 1/2 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.2300 µg/L 115% of the EPA limit, in the worst sample — 0.2000 µg/L | 1/2 | SYR4 |
| Antimony, Total | 0.0970 µg/L 1.6% of the EPA limit 6 µg/L | 1/2 | SYR4 |
| Cadmium | 0.0040 µg/L 0.1% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| Beryllium, Total | 0.0030 µg/L 0.1% of the EPA limit 4 µg/L | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 93203
| Supplier | State | Population served |
|---|---|---|
| TEJON CASTAC WD - I5 & LAVAL RD | CA | 38,125 |
| ARVIN COMMUNITY SERVICES DIST | CA | 19,669 |
Frequently asked questions about ZIP 93203 tap water
Is the tap water in ZIP 93203 safe to drink?
EPA testing detected 33 contaminants across the water suppliers serving ZIP 93203. 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 93203?
2 public water suppliers report EPA drinking-water monitoring for ZIP 93203. Each is listed above with its population served.
What contaminants are in ZIP 93203's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.