What was found in ZIP 93458
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 | 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 | 1/1 | SYR4 |
| 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 | 1/1 | 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 | 1/1 | 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 | 1/1 | SYR4 |
| Chloroform | 20.855 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | 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 | 1/1 | SYR4 |
| Bromodichloromethane | 18.15 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 17.435 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | SYR4 |
| Lithium | 15.1 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2025 | 1/1 | UCMR-5 |
| Dichloroacetic Acid | 12.77 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | 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 | 1/1 | SYR4 |
| Bromoform | 10.225 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 6.865 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 6.84 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | 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 | 1/1 | 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 | 1/1 | SYR4 |
| Monochloroacetic Acid | 2.4 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.74 µg/L No EPA limit set Main supplier: CITY OF SANTA MARIA UTILITIES DEPARTMENT · 109,477 people · 2019 | 1/1 | 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 | 1/1 | 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 | 1/1 | 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 93458
| Supplier | State | Population served |
|---|---|---|
| CITY OF SANTA MARIA UTILITIES DEPARTMENT | CA | 109,477 |
Frequently asked questions about ZIP 93458 tap water
Is the tap water in ZIP 93458 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 93458. 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 93458?
1 public water supplier report EPA drinking-water monitoring for ZIP 93458. Each is listed above with its population served.
What contaminants are in ZIP 93458's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.