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Tap water quality report

Lakeside, CA

EPA monitoring detected 25 contaminants across the 1 water supplier serving Lakeside. 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
35,500
people served
25
contaminants found
California rankings Lead in California PFAS in California

What was found in Lakeside'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
4521.989999999993 µg/L 45%
of the EPA limit 10000 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2017
1/1 SYR4
Fluoride
460.25 µg/L 12%
of the EPA limit 4000 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2017
1/1 SYR4
Barium
236.1999999999999 µg/L 12%
of the EPA limit 2000 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2017
1/1 SYR4
TTHM
52.349999999999994 µg/L 65%
of the EPA limit 80 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
32.87499999999995 µg/L 55%
of the EPA limit 60 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Monochloroacetic Acid
32.5 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Lithium
31 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2024
1/1 UCMR-5
Selenium
23.70499999999999 µg/L 47%
of the EPA limit 50 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2017
1/1 SYR4
Bromoform
20 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Dibromochloromethane
19 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Bromodichloromethane
14 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Combined Uranium
12.517489999999997 µg/L 42%
of the EPA limit 30 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Chloroform
12 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Copper
7.7 µg/L 0.6%
of the EPA limit 1300 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2017
1/1 SYR4
Dichloroacetic Acid
6.6 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Dibromoacetic Acid
6.3199999999999985 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
4.14 µg/L 69%
of the EPA limit 6 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Trichloroacetic Acid
4 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Monobromoacetic Acid
2.5500000000000003 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
Nitrite
0.8463 µg/L 0.1%
of the EPA limit 1000 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2017
1/1 SYR4
Benzo(A)Pyrene
0.1200 µg/L 60%
of the EPA limit 0.2000 µg/L
Main supplier: LAKESIDE WD · 35,500 people · 2019
1/1 SYR4
PFBS
0.0048 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2024
1/1 UCMR-5
PFHXS
0.0048 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2024
1/1 UCMR-5
PFOS
0.0048 µg/L
No EPA limit set
Main supplier: LAKESIDE WD · 35,500 people · 2024
1/1 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: LAKESIDE WD · 35,500 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 Lakeside

SupplierPopulation served
LAKESIDE WD 35,500

Frequently asked questions about Lakeside tap water

Is Lakeside tap water safe to drink?

EPA testing detected 25 contaminants in the water serving Lakeside. 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 Lakeside?

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

What contaminants are in Lakeside's water?

The contaminants EPA monitoring detected in Lakeside include Nitrate, Fluoride, Barium, TTHM, Total Haloacetic Acids (HAA5). 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.