Is Biola, CA Tap Water Safe? Quality & Contaminants

What was found in Biola'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	26095 µg/L 261% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2019	1/1	SYR4
Nitrate-Nitrite	2800 µg/L 28% of the EPA limit 10000 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Fluoride	263 µg/L 6.6% of the EPA limit 4000 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Barium	57.147 µg/L 2.9% of the EPA limit 2000 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Chromium	7.263 µg/L 7.3% of the EPA limit 100 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Arsenic	3.15 µg/L 32% of the EPA limit 10 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Copper	1.26 µg/L 0.1% of the EPA limit 1300 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Selenium	1.01 µg/L 2% of the EPA limit 50 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Nitrite	0.0900 µg/L 0% of the EPA limit 1000 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
1,2-DIBROMO-3-CHLOROPROPANE	0.0468 µg/L 23% of the EPA limit 0.2000 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Ethylene Dibromide	0.0440 µg/L 88% of the EPA limit 0.0500 µg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 people · 2018	1/1	SYR4
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: BIOLA COMMUNITY SERVICES DIST · 1,623 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. 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 Biola

Supplier	Population served
BIOLA COMMUNITY SERVICES DIST	1,623

Frequently asked questions about Biola tap water

Is Biola tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Biola. 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 Biola?

1 public water supplier report drinking-water monitoring for Biola, California to the EPA. Each is listed above with its population served.

What contaminants are in Biola's water?

The contaminants EPA monitoring detected in Biola include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Chromium. 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.