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Tap water quality report

Imperial Beach, CA

EPA monitoring detected 13 contaminants across the 1 water supplier serving Imperial Beach. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
106,000
people served
13
contaminants found
California rankings Lead in California PFAS in California

What was found in Imperial Beach's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
TTHM
69.4 µg/L 87%
of the EPA limit 80 µg/L
 1/1 SYR4
Lithium
65.5 µg/L
No EPA limit set
 1/1 UCMR-5
Dibromochloromethane
29.7 µg/L
No EPA limit set
 1/1 SYR4
Bromoform
27.6 µg/L
No EPA limit set
 1/1 SYR4
Total Haloacetic Acids (HAA5)
23.4 µg/L 39%
of the EPA limit 60 µg/L
 1/1 SYR4
Dibromoacetic Acid
18.6 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
15.1 µg/L
No EPA limit set
 1/1 SYR4
Chloroform
13.8 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
13.3 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
13.2 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
7.7 µg/L
No EPA limit set
 1/1 SYR4
Monobromoacetic Acid
5.4 µg/L
No EPA limit set
 1/1 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 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 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 Imperial Beach

SupplierPopulation served
CAL-AM WATER CORONADO 106,000

Frequently asked questions about Imperial Beach tap water

Is Imperial Beach tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Imperial Beach. 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 Imperial Beach?

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

What contaminants are in Imperial Beach's water?

The contaminants EPA monitoring detected in Imperial Beach include TTHM, Lithium, Dibromochloromethane, Bromoform, Total Haloacetic Acids (HAA5). 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.