What was found in ZIP 93023
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 | 320000 µg/L 3200% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 550000 µg/L — MEINERS OAKS CWD · 4,200 people · 2018 | 3/4 | SYR4 |
| Nitrate | 12200 µg/L 122% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 13175.8 µg/L — MEINERS OAKS CWD · 4,200 people · 2019 | 3/4 | SYR4 |
| Fluoride | 510 µg/L 13% of the EPA limit 4000 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 600 µg/L — MEINERS OAKS CWD · 4,200 people · 2018 | 3/4 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 156.8 µg/L — VENTURA RIVER WATER DISTRICT · 6,100 people · 2018 | 3/4 | SYR4 |
| Barium | 130.4 µg/L 6.5% of the EPA limit 2000 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019 | 3/4 | SYR4 |
| TTHM | 64.65 µg/L 81% of the EPA limit 80 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 75.6 µg/L — VENTURA RIVER WATER DISTRICT · 6,100 people · 2019 | 4/4 | SYR4 |
| Lithium | 16 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2023
Highest in the ZIP: 74.1 µg/L — MEINERS OAKS CWD · 4,200 people · 2024 | 4/4 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 58.9 µg/L 98% of the EPA limit 60 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019 | 4/4 | SYR4 |
| Chloroform | 41.13 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 51.8 µg/L — VENTURA RIVER WATER DISTRICT · 6,100 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 30.3 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 34 µg/L — VENTURA RIVER WATER DISTRICT · 6,100 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 27 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019 | 4/4 | SYR4 |
| Bromoform | 2 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 21.45 µg/L — OJAI WATER SYSTEM · 6,801 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 6 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 20.8 µg/L — OJAI WATER SYSTEM · 6,801 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 18 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 20 µg/L — MEINERS OAKS CWD · 4,200 people · 2019 | 4/4 | SYR4 |
| Copper | 20 µg/L 1.5% of the EPA limit 1300 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019 | 1/4 | SYR4 |
| Monochloroacetic Acid | 3 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 8.115 µg/L — OJAI WATER SYSTEM · 6,801 people · 2019 | 4/4 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 6.65 µg/L — MEINERS OAKS CWD · 4,200 people · 2018 | 3/4 | SYR4 |
| Dibromoacetic Acid | 2 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 6.37 µg/L — OJAI WATER SYSTEM · 6,801 people · 2019 | 4/4 | SYR4 |
| Monobromoacetic Acid | 4 µg/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019
Highest in the ZIP: 6.19 µg/L — OJAI WATER SYSTEM · 6,801 people · 2019 | 4/4 | SYR4 |
| Combined Uranium | 2.17391 µg/L 7.2% of the EPA limit 30 µg/L Highest in the ZIP: MEINERS OAKS CWD · 4,200 people · 2017 | 2/4 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019 | 1/4 | SYR4 |
| Lead | 1.95 µg/L 13% of the EPA limit 15 µg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2019 | 2/4 | SYR4 |
| Gross Beta Particle Activity | 1.4645 pCi/L No EPA limit set Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2012 | 1/4 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CASITAS MUNICIPAL WATER DIST · 11,005 people · 2023 | 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 93023
| Supplier | State | Population served |
|---|---|---|
| CASITAS MUNICIPAL WATER DIST | CA | 11,005 |
| OJAI WATER SYSTEM | CA | 6,801 |
| VENTURA RIVER WATER DISTRICT | CA | 6,100 |
| MEINERS OAKS CWD | CA | 4,200 |
Frequently asked questions about ZIP 93023 tap water
Is the tap water in ZIP 93023 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 93023. 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 93023?
4 public water suppliers report EPA drinking-water monitoring for ZIP 93023. Each is listed above with its population served.
What contaminants are in ZIP 93023's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Chromium, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.