What was found in ZIP 94515
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 | 170 µg/L 1.7% of the EPA limit 10000 µg/L Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| TTHM | 108.5 µg/L 136% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Chloroform | 89.2 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 79.225 µg/L 132% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 50.5 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 33.92 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 22.7 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Chromium | 13 µg/L 13% of the EPA limit 100 µg/L Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 9.9 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 9.345 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Bromoform | 1.95 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.84 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Copper | 1.4 µg/L 0.1% of the EPA limit 1300 µg/L Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| Beryllium, Total | 0.1400 µg/L 3.5% of the EPA limit 4 µg/L Main supplier: CALISTOGA, CITY OF · 5,610 people · 2019 | 1/1 | SYR4 |
| PFOS | 0.0122 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2025 | 1/1 | UCMR-5 |
| PFOA | 0.0064 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0042 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0032 µg/L No EPA limit set Main supplier: CALISTOGA, CITY OF · 5,610 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CALISTOGA, CITY OF · 5,610 people · 2022 | 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 94515
| Supplier | State | Population served |
|---|---|---|
| CALISTOGA, CITY OF | CA | 5,610 |
Frequently asked questions about ZIP 94515 tap water
Is the tap water in ZIP 94515 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 94515. 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 94515?
1 public water supplier report EPA drinking-water monitoring for ZIP 94515. Each is listed above with its population served.
What contaminants are in ZIP 94515's water?
EPA monitoring detected Nitrate, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others across this ZIP's suppliers. The full list with levels and sources is above.