What was found in ZIP 92026
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 | 833.9999999999998 µg/L 21% of the EPA limit 4000 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 2/4 | SYR4 |
| Nitrate | 500 µg/L 5% of the EPA limit 10000 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 1/4 | SYR4 |
| Chlorite | 370 µg/L 37% of the EPA limit 1000 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 1/4 | SYR4 |
| Barium | 130.99999999999997 µg/L 6.5% of the EPA limit 2000 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 1/4 | SYR4 |
| TTHM | 69.25 µg/L 87% of the EPA limit 80 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Lithium | 30 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2023
Highest in the ZIP: 52 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2023 | 4/4 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 29 µg/L 48% of the EPA limit 60 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 5.249999999999998 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019
Highest in the ZIP: 24.5 µg/L — VALLEY CENTER MWD · 29,938 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 24.25 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Chloroform | 23 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 22 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 13.649999999999977 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 9.479999999999995 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Bromoform | 8.025 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019
Highest in the ZIP: 8.2 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 4/4 | SYR4 |
| Copper | 6.539999999999999 µg/L 0.5% of the EPA limit 1300 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 5.6 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019
Highest in the ZIP: 5.9 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2019 | 4/4 | SYR4 |
| Combined Uranium | 4.119849999999998 µg/L 14% of the EPA limit 30 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2018 | 1/4 | SYR4 |
| Gross Beta Particle Activity | 3.8894999999999995 pCi/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2018 | 1/4 | SYR4 |
| Monobromoacetic Acid | 3.8 µg/L No EPA limit set Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 4/4 | SYR4 |
| Arsenic | 2.5 µg/L 25% of the EPA limit 10 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019
Highest in the ZIP: 3.17 µg/L — VISTA IRRIGATION DISTRICT · 132,430 people · 2013 | 2/4 | SYR4 |
| Xylenes, Total | 0.2200 µg/L 0% of the EPA limit 10000 µg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2019 | 1/4 | SYR4 |
| Pfba | 0.0100 µg/L No EPA limit set Highest in the ZIP: RINCON DEL DIABLO MWD (ID-1) · 30,757 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L Main supplier: ESCONDIDO, CITY OF · 137,044 people · 2024
Highest in the ZIP: 0.0040 mg/L — VALLEY CENTER MWD · 29,938 people · 2022 | 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 92026
| Supplier | State | Population served |
|---|---|---|
| ESCONDIDO, CITY OF | CA | 137,044 |
| VISTA IRRIGATION DISTRICT | CA | 132,430 |
| RINCON DEL DIABLO MWD (ID-1) | CA | 30,757 |
| VALLEY CENTER MWD | CA | 29,938 |
Frequently asked questions about ZIP 92026 tap water
Is the tap water in ZIP 92026 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 92026. 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 92026?
4 public water suppliers report EPA drinking-water monitoring for ZIP 92026. Each is listed above with its population served.
What contaminants are in ZIP 92026's water?
EPA monitoring detected Fluoride, Nitrate, Chlorite, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.