What was found in ZIP 94531
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 | 646500 µg/L 6465% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Fluoride | 815 µg/L 20% of the EPA limit 4000 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Nitrate | 791 µg/L 7.9% of the EPA limit 10000 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Copper | 320 µg/L 25% of the EPA limit 1300 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Barium | 158 µg/L 7.9% of the EPA limit 2000 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| TTHM | 46.6 µg/L 58% of the EPA limit 80 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 15.8 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 14 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Chloroform | 13.65 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Bromoform | 9.1 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Bromate | 9.05 µg/L 91% of the EPA limit 10 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2017 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.2 µg/L 14% of the EPA limit 60 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2017 | 1/1 | SYR4 |
| Arsenic | 4.48 µg/L 45% of the EPA limit 10 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 4.22 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2017 | 1/1 | SYR4 |
| Trichloroacetic Acid | 4.2 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2017 | 1/1 | SYR4 |
| Dichloroacetic Acid | 4.18 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2017 | 1/1 | SYR4 |
| Dichloromethane | 3.19 µg/L 64% of the EPA limit 5 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Lead | 2.8 µg/L 19% of the EPA limit 15 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 2.6 µg/L No EPA limit set Main supplier: CITY OF ANTIOCH · 115,074 people · 2017 | 1/1 | SYR4 |
| Cadmium | 1.6 µg/L 32% of the EPA limit 5 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Cyanide | 1.1 µg/L 0.6% of the EPA limit 200 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.2800 µg/L 4.7% of the EPA limit 6 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.2100 µg/L 0.1% of the EPA limit 400 µg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF ANTIOCH · 115,074 people · 2024 | 1/1 | 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 94531
| Supplier | State | Population served |
|---|---|---|
| CITY OF ANTIOCH | CA | 115,074 |
Frequently asked questions about ZIP 94531 tap water
Is the tap water in ZIP 94531 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 94531. 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 94531?
1 public water supplier report EPA drinking-water monitoring for ZIP 94531. Each is listed above with its population served.
What contaminants are in ZIP 94531's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Nitrate, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.