Is Pescadero, CA Tap Water Safe? Quality & Contaminants

What was found in Pescadero's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	31640 µg/L 316% of the EPA limit, in the worst sample — 10000 µg/L	3/5	SYR4
Nitrate-Nitrite	4000 µg/L 40% of the EPA limit 10000 µg/L	2/5	SYR4
Nitrite	1370 µg/L 137% of the EPA limit, in the worst sample — 1000 µg/L	1/5	SYR4
Fluoride	520 µg/L 13% of the EPA limit 4000 µg/L	4/5	SYR4
TTHM	440 µg/L 550% of the EPA limit, in the worst sample — 80 µg/L	4/5	SYR4
Bromoform	320 µg/L No EPA limit set	4/5	SYR4
Total Haloacetic Acids (HAA5)	197 µg/L 328% of the EPA limit, in the worst sample — 60 µg/L	4/5	SYR4
Copper	150 µg/L 12% of the EPA limit 1300 µg/L	2/5	SYR4
Chloroform	99.01 µg/L No EPA limit set	4/5	SYR4
Trichloroacetic Acid	99 µg/L No EPA limit set	4/5	SYR4
Dibromochloromethane	98 µg/L No EPA limit set	4/5	SYR4
Dibromoacetic Acid	91 µg/L No EPA limit set	3/5	SYR4
Dichloroacetic Acid	85.5 µg/L No EPA limit set	4/5	SYR4
Monochloroacetic Acid	45 µg/L No EPA limit set	2/5	SYR4
Bromodichloromethane	43 µg/L No EPA limit set	4/5	SYR4
Barium	35 µg/L 1.8% of the EPA limit 2000 µg/L	2/5	SYR4
Antimony, Total	15 µg/L 250% of the EPA limit, in the worst sample — 6 µg/L	1/5	SYR4
Monobromoacetic Acid	15 µg/L No EPA limit set	2/5	SYR4
Chromium	13 µg/L 13% of the EPA limit 100 µg/L	1/5	SYR4
Selenium	9.8 µg/L 20% of the EPA limit 50 µg/L	1/5	SYR4
Arsenic	8.1 µg/L 81% of the EPA limit 10 µg/L	2/5	SYR4
Gross Beta Particle Activity	6.54 pCi/L No EPA limit set	2/5	SYR4
Cyanide	2.2 µg/L 1.1% of the EPA limit 200 µg/L	1/5	SYR4
Combined Uranium	0.5587 µg/L 1.9% of the EPA limit 30 µg/L	1/5	SYR4
Lead	0.0023 mg/L 15% of the EPA limit 0.0150 mg/L	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 single worst sample on record — 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, Nitrite, Fluoride, TTHM. The full list, with the highest level found 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.