What was found in ZIP 93455
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 | 17800 µg/L 178% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 876000 µg/L — GOLDEN STATE WATER COMPANY - ORCUTT · 34,102 people · 2017 | 3/3 | SYR4 |
| Nitrate | 18000 µg/L 180% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 2/3 | SYR4 |
| Fluoride | 957.5 µg/L 24% of the EPA limit 4000 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 2/3 | SYR4 |
| Copper | 288.5 µg/L 22% of the EPA limit 1300 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 1/3 | SYR4 |
| TTHM | 50.82 µg/L 64% of the EPA limit 80 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 122.275 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Chloroform | 20.855 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 94.645 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 20.04 µg/L 33% of the EPA limit 60 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Barium | 50.8 µg/L 2.5% of the EPA limit 2000 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2013 | 1/3 | SYR4 |
| Monochloroacetic Acid | 2.4 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 50.25 µg/L — GOLDEN STATE WATER COMPANY - ORCUTT · 34,102 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 6.865 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 12.77 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 30.355 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Lithium | 15.1 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2025
Highest in the ZIP: 24.1 µg/L — GOLDEN STATE WATER COMPANY - ORCUTT · 34,102 people · 2024 | 2/3 | UCMR-5 |
| Bromodichloromethane | 18.15 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 24.055 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Lead | 18.392 µg/L 123% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 1/3 | SYR4 |
| Dibromochloromethane | 17.435 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 3/3 | SYR4 |
| Trichloroethylene | 11.02 µg/L 220% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2018 | 1/3 | SYR4 |
| Bromoform | 10.225 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 6.84 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 6.04195 µg/L 20% of the EPA limit 30 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2017 | 1/3 | SYR4 |
| Tetrachloroethylene | 5.63 µg/L 113% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2018 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.74 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019
Highest in the ZIP: 3.6495 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 2.054 pCi/L No EPA limit set Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Mercury | 1.3 µg/L 65% of the EPA limit 2 µg/L Highest in the ZIP: GOLDEN STATE WATER COMPANY - ORCUTT · 34,102 people · 2017 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.095 pCi/L 22% of the EPA limit 5 pCi/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.9000 µg/L 1.3% of the EPA limit 70 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.4900 µg/L 25% of the EPA limit 2 µg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2025
Highest in the ZIP: 0.00056 mg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2024 | 3/3 | 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 93455
| Supplier | State | Population served |
|---|---|---|
| CITY OF SANTA MARIA UTILITIES DEPARTMENT | CA | 109,477 |
| GOLDEN STATE WATER COMPANY - ORCUTT | CA | 34,102 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
Frequently asked questions about ZIP 93455 tap water
Is the tap water in ZIP 93455 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 93455. 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 93455?
3 public water suppliers report EPA drinking-water monitoring for ZIP 93455. Each is listed above with its population served.
What contaminants are in ZIP 93455's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.