Is Brownsville, CA Tap Water Safe? Quality & Contaminants

What was found in Brownsville'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
Copper	90 µg/L 6.9% of the EPA limit 1300 µg/L Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2013	1/1	SYR4
TTHM	48.85 µg/L 61% of the EPA limit 80 µg/L Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Chloroform	46.8 µg/L No EPA limit set Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Total Haloacetic Acids (HAA5)	25.05 µg/L 42% of the EPA limit 60 µg/L Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Trichloroacetic Acid	14.05 µg/L No EPA limit set Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Dichloroacetic Acid	11.3 µg/L No EPA limit set Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Monochloroacetic Acid	7.5 µg/L No EPA limit set Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Cadmium	4.2 µg/L 84% of the EPA limit 5 µg/L Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2013	1/1	SYR4
Beryllium, Total	3.9 µg/L 98% of the EPA limit 4 µg/L Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2016	1/1	SYR4
Bromodichloromethane	3.845 µg/L No EPA limit set Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Dibromoacetic Acid	1.2 µg/L No EPA limit set Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Dibromochloromethane	1.2 µg/L No EPA limit set Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2019	1/1	SYR4
Lead	0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: NORTH YUBA WATER DISTRICT · 2,772 people · 2024	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 Brownsville

Supplier	Population served
NORTH YUBA WATER DISTRICT	2,772

Frequently asked questions about Brownsville tap water

Is Brownsville tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Brownsville. 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 Brownsville?

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

What contaminants are in Brownsville's water?

The contaminants EPA monitoring detected in Brownsville include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid. 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.