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Tap water quality report

City of Millbrae

EPA monitoring tested this supplier for 42 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

42
contaminants tested
11
detected
22,795
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Local government
Counties served
San Mateo

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

Other contaminants detected

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Chloroform
69.9 µg/L
No EPA limit set
 242/242 SYR4 2012–2019
TTHM
73.2 µg/L 92%
of the EPA limit 80 µg/L
 242/242 SYR4 2012–2019
Dichloroacetic Acid
30.9 µg/L
No EPA limit set
 236/236 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
64.3 µg/L 107%
of the EPA limit, in the worst sample — 60 µg/L
 236/236 SYR4 2012–2019
Bromodichloromethane
10.8 µg/L
No EPA limit set
 232/242 SYR4 2012–2019
Trichloroacetic Acid
31.3 µg/L
No EPA limit set
 212/236 SYR4 2012–2019
Dibromochloromethane
8.5 µg/L
No EPA limit set
 111/242 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 46/46 LCR 2025
Monochloroacetic Acid
5.2 µg/L
No EPA limit set
 46/236 SYR4 2012–2019
Dibromoacetic Acid
1.9 µg/L
No EPA limit set
 20/236 SYR4 2012–2019
Bromoform
1.2 µg/L
No EPA limit set
 9/242 SYR4 2012–2019
31 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
CENTIS, CRAIG
Phone
650-259-2374
Email
CCENTIS@CI.MILLBRAE.CA.US

Frequently asked questions about City of Millbrae

Is City of Millbrae tap water safe to drink?

EPA monitoring detected 11 contaminants in City of Millbrae's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in City of Millbrae's water?

EPA monitoring detected Chloroform, TTHM, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does City of Millbrae serve?

City of Millbrae reports serving 22,795 people in California, per its EPA record.

Has City of Millbrae had any water quality violations?

The EPA has no formal drinking-water violations on file for City of Millbrae.

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.