Is Buena Park, CA Tap Water Safe? Quality & Contaminants

What was found in Buena Park'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
TTHM	48.29 µg/L 60% of the EPA limit 80 µg/L Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Lithium	36.5167 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2025	1/1	UCMR-5
Total Haloacetic Acids (HAA5)	16.69 µg/L 28% of the EPA limit 60 µg/L Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Dibromochloromethane	15.535 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Chloroform	15.08 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Bromodichloromethane	14.52 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Bromoform	9.155 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Dichloroacetic Acid	7.69 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Trichloroacetic Acid	5.78 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Dibromoacetic Acid	5.595 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Monochloroacetic Acid	2.285 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
Monobromoacetic Acid	1.5 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2019	1/1	SYR4
PFOS	0.0068 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2025	1/1	UCMR-5
PFHXS	0.0039 µg/L No EPA limit set Main supplier: CITY OF BUENA PARK · 81,998 people · 2025	1/1	UCMR-5
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF BUENA PARK · 81,998 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 Buena Park

Supplier	Population served
CITY OF BUENA PARK	81,998

Frequently asked questions about Buena Park tap water

Is Buena Park tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Buena Park. 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 Buena Park?

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

What contaminants are in Buena Park's water?

The contaminants EPA monitoring detected in Buena Park include TTHM, Lithium, Total Haloacetic Acids (HAA5), Dibromochloromethane, Chloroform. 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.