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Tap water quality report

La Canada, CA

EPA monitoring detected 22 contaminants across the 1 water supplier serving La Canada. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
9,300
people served
22
contaminants found
California rankings Lead in California PFAS in California

What was found in La Canada'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
12030.6 µg/L 120%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Nitrate-Nitrite
10000 µg/L 100%
of the EPA limit 10000 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Fluoride
385 µg/L 9.6%
of the EPA limit 4000 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Barium
118 µg/L 5.9%
of the EPA limit 2000 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
TTHM
61.54 µg/L 77%
of the EPA limit 80 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Lithium
53 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2023
1/1 UCMR-5
Total Haloacetic Acids (HAA5)
22.4 µg/L 37%
of the EPA limit 60 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Chloroform
19.645 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Dibromochloromethane
19.305 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Bromodichloromethane
18.935 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Combined Uranium
11.5475 µg/L 38%
of the EPA limit 30 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Dichloroacetic Acid
11.285 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Trichloroacetic Acid
7.815 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Bromoform
7.375 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Lead
6.6 µg/L 44%
of the EPA limit 15 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Arsenic
5.77 µg/L 58%
of the EPA limit 10 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Dibromoacetic Acid
5.645 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Monochloroacetic Acid
2.98 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Trichloroethylene
2.2 µg/L 44%
of the EPA limit 5 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Tetrachloroethylene
1.27 µg/L 25%
of the EPA limit 5 µg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Monobromoacetic Acid
1 µg/L
No EPA limit set
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 people · 2019
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: LA CANADA IRRIGATION DIST. · 9,300 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 La Canada

SupplierPopulation served
LA CANADA IRRIGATION DIST. 9,300

Frequently asked questions about La Canada tap water

Is La Canada tap water safe to drink?

EPA testing detected 22 contaminants in the water serving La Canada. 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 La Canada?

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

What contaminants are in La Canada's water?

The contaminants EPA monitoring detected in La Canada include Nitrate, Nitrate-Nitrite, Fluoride, Barium, TTHM. 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.