Tap WaterIndex

← California

Tap water quality report

Millbrae, CA

EPA monitoring detected 11 contaminants across the 1 water supplier serving Millbrae. 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
22,795
people served
11
contaminants found
California rankings Lead in California PFAS in California

What was found in Millbrae'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
TTHM
65.78999999999999 µg/L 82%
of the EPA limit 80 µg/L
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Chloroform
61.669999999999995 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
45.625 µg/L 76%
of the EPA limit 60 µg/L
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Dichloroacetic Acid
23.575 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Trichloroacetic Acid
22.7 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Bromodichloromethane
8.013499999999999 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Dibromochloromethane
5.234999999999999 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.075 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.9 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Bromoform
1.16 µg/L
No EPA limit set
Main supplier: CITY OF MILLBRAE · 22,795 people · 2019
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: CITY OF MILLBRAE · 22,795 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 Millbrae

SupplierPopulation served
CITY OF MILLBRAE 22,795

Frequently asked questions about Millbrae tap water

Is Millbrae tap water safe to drink?

EPA testing detected 11 contaminants in the water serving Millbrae. 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 Millbrae?

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

What contaminants are in Millbrae's water?

The contaminants EPA monitoring detected in Millbrae include TTHM, Chloroform, Total Haloacetic Acids (HAA5), Dichloroacetic Acid, Trichloroacetic Acid. 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.