What was found in ZIP 92056
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 | 13804.999999999984 µg/L 138% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 11249.99999999999 µg/L 112% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| Fluoride | 395.34999999999997 µg/L 9.9% of the EPA limit 4000 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019
Highest in the ZIP: 683.5 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2013 | 2/2 | SYR4 |
| Nitrite | 390.1499999999999 µg/L 39% of the EPA limit 1000 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| Barium | 179.5 µg/L 9% of the EPA limit 2000 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| TTHM | 60.785 µg/L 76% of the EPA limit 80 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Chromium | 53 µg/L 53% of the EPA limit 100 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| Lithium | 38 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2024
Highest in the ZIP: 52 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2023 | 2/2 | UCMR-5 |
| Combined Uranium | 33.67399999999999 µg/L 112% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 28 µg/L 47% of the EPA limit 60 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Toluene | 21 µg/L 2.1% of the EPA limit 1000 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 20.719999999999995 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 20.34 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 19.384999999999998 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Chloroform | 18.61 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019
Highest in the ZIP: 18.739999999999984 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 14.139999999999997 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Bromoform | 8.959999999999999 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 7.314999999999998 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 6.534999999999999 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019
Highest in the ZIP: 3.17 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2013 | 2/2 | SYR4 |
| Monobromoacetic Acid | 2.7699999999999996 µg/L No EPA limit set Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 2/2 | SYR4 |
| Trichloroethylene | 2.7 µg/L 54% of the EPA limit 5 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| 1,2-Dichloropropane | 0.8850 µg/L 18% of the EPA limit 5 µg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: OCEANSIDE, CITY OF · 171,483 people · 2024 | 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 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 92056
| Supplier | State | Population served |
|---|---|---|
| OCEANSIDE, CITY OF | CA | 171,483 |
| VISTA IRRIGATION DISTRICT | CA | 132,430 |
Frequently asked questions about ZIP 92056 tap water
Is the tap water in ZIP 92056 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 92056. 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 92056?
2 public water suppliers report EPA drinking-water monitoring for ZIP 92056. Each is listed above with its population served.
What contaminants are in ZIP 92056's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.