What was found in ZIP 92308
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 | 450 µg/L 4.5% of the EPA limit 10000 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2016
Highest in the ZIP: 799390 µg/L — GOLDEN STATE WATER CO - APPLE VLY SOUTH · 6,208 people · 2017 | 4/4 | SYR4 |
| Nitrate | 4294 µg/L 43% of the EPA limit 10000 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 4/4 | SYR4 |
| Fluoride | 935 µg/L 23% of the EPA limit 4000 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 4/4 | SYR4 |
| Copper | 100 µg/L 7.7% of the EPA limit 1300 µg/L Highest in the ZIP: RANCHERITOS MWC · 487 people · 2019 | 1/4 | SYR4 |
| Barium | 49.3 µg/L 2.5% of the EPA limit 2000 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 1/4 | SYR4 |
| Lithium | 32 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2025 | 3/4 | UCMR-5 |
| TTHM | 24.4 µg/L 31% of the EPA limit 80 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 3/4 | SYR4 |
| Bromoform | 17.4 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 2/4 | SYR4 |
| Chromium | 6.225 µg/L 6.2% of the EPA limit 100 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019
Highest in the ZIP: 17 µg/L — RANCHERITOS MWC · 487 people · 2019 | 2/4 | SYR4 |
| Arsenic | 4.98 µg/L 50% of the EPA limit 10 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019
Highest in the ZIP: 12 µg/L — SBDNO COUNTY SERVICE AREA 64 · 14,911 people · 2019 | 4/4 | SYR4 |
| Lead | 8.4 µg/L 56% of the EPA limit 15 µg/L Highest in the ZIP: RANCHERITOS MWC · 487 people · 2019 | 1/4 | SYR4 |
| Dibromochloromethane | 6.33 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 3/4 | SYR4 |
| Combined Uranium | 4.47 µg/L 15% of the EPA limit 30 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 3.2 µg/L No EPA limit set Highest in the ZIP: GOLDEN STATE WATER CO - APPLE VLY SOUTH · 6,208 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.29 µg/L 3.8% of the EPA limit 60 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019
Highest in the ZIP: 3.2 µg/L — GOLDEN STATE WATER CO - APPLE VLY SOUTH · 6,208 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 1.38 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019
Highest in the ZIP: 2.425 µg/L — SBDNO COUNTY SERVICE AREA 64 · 14,911 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 2.26 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 1/4 | SYR4 |
| Beryllium, Total | 1.9 µg/L 48% of the EPA limit 4 µg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2019 | 1/4 | SYR4 |
| Chloroform | 1.6 µg/L No EPA limit set Highest in the ZIP: SBDNO COUNTY SERVICE AREA 64 · 14,911 people · 2019 | 1/4 | SYR4 |
| Toluene | 0.5000 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the ZIP: SBDNO COUNTY SERVICE AREA 64 · 14,911 people · 2018 | 1/4 | SYR4 |
| Lead | 0.00056 mg/L 3.7% of the EPA limit 0.0150 mg/L Main supplier: LIBERTY UTILITIES (AV RANCHOS) CORP. · 64,469 people · 2025 | 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 92308
| Supplier | State | Population served |
|---|---|---|
| LIBERTY UTILITIES (AV RANCHOS) CORP. | CA | 64,469 |
| SBDNO COUNTY SERVICE AREA 64 | CA | 14,911 |
| GOLDEN STATE WATER CO - APPLE VLY SOUTH | CA | 6,208 |
| RANCHERITOS MWC | CA | 487 |
Frequently asked questions about ZIP 92308 tap water
Is the tap water in ZIP 92308 safe to drink?
EPA testing detected 21 contaminants across the water suppliers serving ZIP 92308. 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 92308?
4 public water suppliers report EPA drinking-water monitoring for ZIP 92308. Each is listed above with its population served.
What contaminants are in ZIP 92308'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.