Is Alhambra, CA Tap Water Safe? Quality & Contaminants

What was found in Alhambra'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	15142 µg/L 151% of the EPA limit, in the worst sample — 10000 µg/L	8/10	SYR4
Nitrate-Nitrite	13000 µg/L 130% of the EPA limit, in the worst sample — 10000 µg/L	8/10	SYR4
Fluoride	2840 µg/L 71% of the EPA limit 4000 µg/L	8/10	SYR4
Barium	196 µg/L 9.8% of the EPA limit 2000 µg/L	4/10	SYR4
TTHM	151 µg/L 189% of the EPA limit, in the worst sample — 80 µg/L	10/10	SYR4
Arsenic	78.5 µg/L 785% of the EPA limit, in the worst sample — 10 µg/L	3/10	SYR4
Bromoform	58.7 µg/L No EPA limit set	10/10	SYR4
Lithium	58 µg/L No EPA limit set	3/10	UCMR-5
Dibromochloromethane	54 µg/L No EPA limit set	10/10	SYR4
cis-1,2-Dichloroethylene	50 µg/L 71% of the EPA limit 70 µg/L	1/10	SYR4
Total Haloacetic Acids (HAA5)	45 µg/L 75% of the EPA limit 60 µg/L	10/10	SYR4
Bromodichloromethane	37.8 µg/L No EPA limit set	10/10	SYR4
Chromium	35.9 µg/L 36% of the EPA limit 100 µg/L	5/10	SYR4
Trichloroethylene	31 µg/L 620% of the EPA limit, in the worst sample — 5 µg/L	1/10	SYR4
Chloroform	29.2 µg/L No EPA limit set	10/10	SYR4
Trichloroacetic Acid	28 µg/L No EPA limit set	9/10	SYR4
Dibromoacetic Acid	19.2 µg/L No EPA limit set	10/10	SYR4
Dichloroacetic Acid	17 µg/L No EPA limit set	9/10	SYR4
Selenium	12.1 µg/L 24% of the EPA limit 50 µg/L	2/10	SYR4
Combined Uranium	11.771 µg/L 39% of the EPA limit 30 µg/L	6/10	SYR4
Di(2-ethylhexyl) Phthalate	11 µg/L 183% of the EPA limit, in the worst sample — 6 µg/L	1/10	SYR4
Lead	6.2 µg/L 41% of the EPA limit 15 µg/L	1/10	SYR4
Tetrachloroethylene	4.7 µg/L 94% of the EPA limit 5 µg/L	1/10	SYR4
Gross Beta Particle Activity	4.14 pCi/L No EPA limit set	1/10	SYR4
Monobromoacetic Acid	3.88 µg/L No EPA limit set	7/10	SYR4
Combined Radium (-226 And -228)	2.9 pCi/L 58% of the EPA limit 5 pCi/L	1/10	SYR4
trans-1,2-Dichloroethylene	0.8300 µg/L 0.8% of the EPA limit 100 µg/L	1/10	SYR4
1,1-Dichloroethylene	0.7700 µg/L 11% of the EPA limit 7 µg/L	1/10	SYR4
Toluene	0.5710 µg/L 0.1% of the EPA limit 1000 µg/L	1/10	SYR4
Carbon Tetrachloride	0.5200 µg/L 10% of the EPA limit 5 µg/L	1/10	SYR4
1,2-DIBROMO-3-CHLOROPROPANE	0.1300 µg/L 65% of the EPA limit 0.2000 µg/L	1/10	SYR4
Lead	0.0558 mg/L 372% above the EPA limit of 0.0150 mg/L	10/10	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 Alhambra

Supplier	Population served
LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER	208,129
CITY OF ALHAMBRA	79,776
LOS ANGELES CWWD 29 & 80-MALIBU	32,348
LOS ANGELES CWWD 40, REG. 38-LAKE LA	12,568
LOS ANGELES CWWD 40, R 24,27,33-PEARBLSM	11,509
LOS ANGELES CWWD 36-VAL VERDE	6,376
LOS ANGELES CWWD 37-ACTON	4,805
LOS ANGELES CWWD 40, REG. 39-ROCK CREEK	994
LOS ANGELES CWWD 21-KAGEL CANYON	708
LOS ANGELES CWWD 40, REG. 35-N.E. L.A.	612

Frequently asked questions about Alhambra tap water

Is Alhambra tap water safe to drink?

EPA testing detected 32 contaminants in the water serving Alhambra. 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 Alhambra?

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

What contaminants are in Alhambra's water?

The contaminants EPA monitoring detected in Alhambra 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.