What was found in ZIP 92078
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 |
|---|---|---|---|
| Fluoride | 683.5 µg/L 17% of the EPA limit 4000 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2013 | 1/2 | SYR4 |
| TTHM | 57.464999999999975 µg/L 72% of the EPA limit 80 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Lithium | 52 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2023 | 2/2 | UCMR-5 |
| Lead | 27.86 µg/L 186% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the ZIP: VALLECITOS WD · 113,500 people · 2017 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 22.705 µg/L 38% of the EPA limit 60 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 19.6 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 18.904999999999998 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Chloroform | 18.739999999999984 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 11.004999999999999 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Bromoform | 8.2 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 6.4 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 5.9 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 5.17 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 2/2 | SYR4 |
| Arsenic | 3.17 µg/L 32% of the EPA limit 10 µg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2013 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.4849999999999999 µg/L No EPA limit set Main supplier: VISTA IRRIGATION DISTRICT · 132,430 people · 2019
Highest in the ZIP: 1.9 µg/L — VALLECITOS WD · 113,500 people · 2019 | 2/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: VISTA IRRIGATION DISTRICT · 132,430 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 92078
| Supplier | State | Population served |
|---|---|---|
| VISTA IRRIGATION DISTRICT | CA | 132,430 |
| VALLECITOS WD | CA | 113,500 |
Frequently asked questions about ZIP 92078 tap water
Is the tap water in ZIP 92078 safe to drink?
EPA testing detected 16 contaminants across the water suppliers serving ZIP 92078. 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 92078?
2 public water suppliers report EPA drinking-water monitoring for ZIP 92078. Each is listed above with its population served.
What contaminants are in ZIP 92078's water?
EPA monitoring detected Fluoride, TTHM, Lithium, Lead, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.