Is Fullerton, CA Tap Water Safe? Quality & Contaminants

What was found in Fullerton'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	6640 µg/L 66% of the EPA limit 10000 µg/L	2/2	SYR4
Nitrate-Nitrite	6640 µg/L 66% of the EPA limit 10000 µg/L	2/2	SYR4
Fluoride	650 µg/L 16% of the EPA limit 4000 µg/L	2/2	SYR4
Barium	121 µg/L 6.1% of the EPA limit 2000 µg/L	1/2	SYR4
TTHM	55.6 µg/L 70% of the EPA limit 80 µg/L	2/2	SYR4
Lithium	34.9834 µg/L No EPA limit set	1/2	UCMR-5
Chloroform	28.2 µg/L No EPA limit set	2/2	SYR4
Total Haloacetic Acids (HAA5)	26.36 µg/L 44% of the EPA limit 60 µg/L	2/2	SYR4
Combined Uranium	20.86 µg/L 70% of the EPA limit 30 µg/L	2/2	SYR4
Bromodichloromethane	18.3 µg/L No EPA limit set	1/2	SYR4
Dibromochloromethane	18.3 µg/L No EPA limit set	2/2	SYR4
Dichloroacetic Acid	14.6 µg/L No EPA limit set	1/2	SYR4
Bromoform	13.5 µg/L No EPA limit set	2/2	SYR4
Selenium	10.3 µg/L 21% of the EPA limit 50 µg/L	2/2	SYR4
Trichloroacetic Acid	8.92 µg/L No EPA limit set	1/2	SYR4
Monochloroacetic Acid	7.04 µg/L No EPA limit set	1/2	SYR4
Dibromoacetic Acid	6.7 µg/L No EPA limit set	2/2	SYR4
1,1-Dichloroethylene	6 µg/L 86% of the EPA limit 7 µg/L	2/2	SYR4
Tetrachloroethylene	4 µg/L 80% of the EPA limit 5 µg/L	1/2	SYR4
Trichloroethylene	2.5 µg/L 50% of the EPA limit 5 µg/L	2/2	SYR4
Arsenic	2 µg/L 20% of the EPA limit 10 µg/L	1/2	SYR4
Monobromoacetic Acid	1.81 µg/L No EPA limit set	1/2	SYR4
PFOS	0.0133 µg/L No EPA limit set	1/2	UCMR-5
Pfpea	0.0132 µg/L No EPA limit set	1/2	UCMR-5
Pfhxa	0.0124 µg/L No EPA limit set	1/2	UCMR-5
PFOA	0.0108 µg/L No EPA limit set	1/2	UCMR-5
PFBS	0.0076 µg/L No EPA limit set	1/2	UCMR-5
PFHXS	0.0062 µg/L No EPA limit set	1/2	UCMR-5
Pfba	0.0059 µg/L No EPA limit set	1/2	UCMR-5
Pfhpa	0.0048 µg/L No EPA limit set	1/2	UCMR-5
Lead	0.0015 mg/L 10% of the EPA limit 0.0150 mg/L	2/2	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 Fullerton

Supplier	Population served
CITY OF FULLERTON	139,461
PAGE AVENUE MUTUAL WATER COMPANY	119

Frequently asked questions about Fullerton tap water

Is Fullerton tap water safe to drink?

EPA testing detected 31 contaminants in the water serving Fullerton. 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 Fullerton?

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

What contaminants are in Fullerton's water?

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