Is Santa Paula, CA Tap Water Safe? Quality & Contaminants

What was found in Santa Paula'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-Nitrite	800000 µg/L 8000% of the EPA limit, in the worst sample — 10000 µg/L	3/5	SYR4
Nitrate	5966.4 µg/L 60% of the EPA limit 10000 µg/L	3/5	SYR4
Fluoride	800 µg/L 20% of the EPA limit 4000 µg/L	3/5	SYR4
Copper	70 µg/L 5.4% of the EPA limit 1300 µg/L	1/5	SYR4
Selenium	66 µg/L 132% of the EPA limit, in the worst sample — 50 µg/L	3/5	SYR4
Lithium	46 µg/L No EPA limit set	1/5	UCMR-5
Barium	40 µg/L 2% of the EPA limit 2000 µg/L	3/5	SYR4
TTHM	20.5 µg/L 26% of the EPA limit 80 µg/L	5/5	SYR4
Bromoform	12.1 µg/L No EPA limit set	5/5	SYR4
Arsenic	7 µg/L 70% of the EPA limit 10 µg/L	2/5	SYR4
Total Haloacetic Acids (HAA5)	7 µg/L 12% of the EPA limit 60 µg/L	4/5	SYR4
Combined Uranium	6.6454 µg/L 22% of the EPA limit 30 µg/L	3/5	SYR4
Dibromochloromethane	6.5 µg/L No EPA limit set	5/5	SYR4
Chromium	6 µg/L 6% of the EPA limit 100 µg/L	2/5	SYR4
Dibromoacetic Acid	6 µg/L No EPA limit set	4/5	SYR4
Lead	2.5 µg/L 17% of the EPA limit 15 µg/L	1/5	SYR4
Bromodichloromethane	2 µg/L No EPA limit set	5/5	SYR4
Chloroform	2 µg/L No EPA limit set	3/5	SYR4
Toluene	1.6 µg/L 0.2% of the EPA limit 1000 µg/L	1/5	SYR4
Cadmium	1.4 µg/L 28% of the EPA limit 5 µg/L	2/5	SYR4
Trichloroacetic Acid	1 µg/L No EPA limit set	2/5	SYR4
Pentachlorophenol	0.4000 µg/L 40% of the EPA limit 1 µg/L	1/5	SYR4
Mercury	0.0400 µg/L 2% of the EPA limit 2 µg/L	1/5	SYR4
Lead	0.0 mg/L 0% 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 Santa Paula

Supplier	Population served
CITY OF SANTA PAULA	31,018
LIMONEIRA RANCH #1	1,187
SISAR MUTUAL WATER CO	340
MIDDLE ROAD MUTUAL WATER CO	134
SOUTH MOUNTAIN MUTUAL WATER CO	58

Frequently asked questions about Santa Paula tap water

Is Santa Paula tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Santa Paula. 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 Santa Paula?

5 public water suppliers report drinking-water monitoring for Santa Paula, California to the EPA. Each is listed above with its population served.

What contaminants are in Santa Paula's water?

The contaminants EPA monitoring detected in Santa Paula include Nitrate-Nitrite, Nitrate, Fluoride, Copper, Selenium. 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.