What was found in Pescadero's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 29380 µg/L 294% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the city: MARCHI CENTRAL FARM · 50 people · 2019 | 3/5 | SYR4 |
| Nitrate-Nitrite | 3890 µg/L 39% of the EPA limit 10000 µg/L Highest in the city: MARCHI CENTRAL FARM · 50 people · 2019 | 2/5 | SYR4 |
| Fluoride | 147 µg/L 3.7% of the EPA limit 4000 µg/L Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 506.5 µg/L — OKU INCORPORATED · 35 people · 2018 | 4/5 | SYR4 |
| TTHM | 102.57 µg/L 128% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 380 µg/L — BIANCHI FLOWERS INC · 65 people · 2019 | 4/5 | SYR4 |
| Bromoform | 7.782 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 276 µg/L — BIANCHI FLOWERS INC · 65 people · 2019 | 4/5 | SYR4 |
| Nitrite | 275.232 µg/L 28% of the EPA limit 1000 µg/L Highest in the city: BIANCHI FLOWERS INC · 65 people · 2019 | 1/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.94 µg/L 68% of the EPA limit 60 µg/L Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 157.64 µg/L — OKU INCORPORATED · 35 people · 2019 | 4/5 | SYR4 |
| Copper | 66 µg/L 5.1% of the EPA limit 1300 µg/L Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 142.785 µg/L — OKU INCORPORATED · 35 people · 2018 | 2/5 | SYR4 |
| Dibromochloromethane | 29.248 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 91 µg/L — BIANCHI FLOWERS INC · 65 people · 2019 | 4/5 | SYR4 |
| Dibromoacetic Acid | 7.86 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 89.5 µg/L — BIANCHI FLOWERS INC · 65 people · 2019 | 3/5 | SYR4 |
| Trichloroacetic Acid | 18.705 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 77.65 µg/L — OKU INCORPORATED · 35 people · 2019 | 4/5 | SYR4 |
| Chloroform | 54.078 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 66.6 µg/L — OKU INCORPORATED · 35 people · 2019 | 4/5 | SYR4 |
| Monochloroacetic Acid | 6.155 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 42 µg/L — OKU INCORPORATED · 35 people · 2019 | 2/5 | SYR4 |
| Dichloroacetic Acid | 23.98 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 41.2 µg/L — OKU INCORPORATED · 35 people · 2019 | 4/5 | SYR4 |
| Bromodichloromethane | 31.32 µg/L No EPA limit set Main supplier: BUTANO CANYON MUTUAL · 150 people · 2019
Highest in the city: 35.2 µg/L — OKU INCORPORATED · 35 people · 2019 | 4/5 | SYR4 |
| Barium | 34.95 µg/L 1.7% of the EPA limit 2000 µg/L Highest in the city: OKU INCORPORATED · 35 people · 2018 | 2/5 | SYR4 |
| Antimony, Total | 15 µg/L 250% of the EPA limit, at the 95th percentile of samples — 6 µg/L Highest in the city: MARCHI CENTRAL FARM · 50 people · 2017 | 1/5 | SYR4 |
| Monobromoacetic Acid | 14 µg/L No EPA limit set Highest in the city: OKU INCORPORATED · 35 people · 2019 | 2/5 | SYR4 |
| Chromium | 13 µg/L 13% of the EPA limit 100 µg/L Highest in the city: BIANCHI FLOWERS INC · 65 people · 2017 | 1/5 | SYR4 |
| Selenium | 9.8 µg/L 20% of the EPA limit 50 µg/L Highest in the city: OKU INCORPORATED · 35 people · 2018 | 1/5 | SYR4 |
| Arsenic | 7.955 µg/L 80% of the EPA limit 10 µg/L Highest in the city: MARCHI CENTRAL FARM · 50 people · 2019 | 2/5 | SYR4 |
| Gross Beta Particle Activity | 6.54 pCi/L No EPA limit set Highest in the city: OKU INCORPORATED · 35 people · 2015 | 2/5 | SYR4 |
| Cyanide | 2.16 µg/L 1.1% of the EPA limit 200 µg/L Highest in the city: OKU INCORPORATED · 35 people · 2018 | 1/5 | SYR4 |
| Combined Uranium | 0.5587 µg/L 1.9% of the EPA limit 30 µg/L Highest in the city: OKU INCORPORATED · 35 people · 2013 | 1/5 | SYR4 |
| Lead | 0.0023 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: BUTANO CANYON MUTUAL · 150 people · 2025 | 5/5 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Pescadero
| Supplier | Population served |
|---|---|
| BUTANO CANYON MUTUAL | 150 |
| BIANCHI FLOWERS INC | 65 |
| MARCHI CENTRAL FARM | 50 |
| OKU INCORPORATED | 35 |
| PUENTE HOUSING SOLUTIONS | 28 |
Frequently asked questions about Pescadero tap water
Is Pescadero tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Pescadero. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Pescadero?
5 public water suppliers report drinking-water monitoring for Pescadero, California to the EPA. Each is listed above with its population served.
What contaminants are in Pescadero's water?
The contaminants EPA monitoring detected in Pescadero include Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Bromoform. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.