Is City of Millbrae Tap Water Safe? Quality Report

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Chloroform	61.67 µg/L No EPA limit set worst single sample: 69.9 µg/L	242/242	SYR4	2012–2019
TTHM	65.79 µg/L 82% of the EPA limit 80 µg/L worst single sample: 73.2 µg/L	242/242	SYR4	2012–2019
Dichloroacetic Acid	23.575 µg/L No EPA limit set worst single sample: 30.9 µg/L	236/236	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	45.625 µg/L 76% of the EPA limit 60 µg/L worst single sample: 64.3 µg/L	236/236	SYR4	2012–2019
Bromodichloromethane	8.0135 µg/L No EPA limit set worst single sample: 10.8 µg/L	232/242	SYR4	2012–2019
Trichloroacetic Acid	22.7 µg/L No EPA limit set worst single sample: 31.3 µg/L	212/236	SYR4	2012–2019
Dibromochloromethane	5.235 µg/L No EPA limit set worst single sample: 8.5 µg/L	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	3.075 µg/L No EPA limit set worst single sample: 5.2 µg/L	46/236	SYR4	2012–2019
Dibromoacetic Acid	1.9 µg/L No EPA limit set	20/236	SYR4	2012–2019
Bromoform	1.16 µg/L No EPA limit set worst single sample: 1.2 µg/L	9/242	SYR4	2012–2019

31 contaminants tested, none detected

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Utility contact

Contact: CENTIS, CRAIG
Phone: 650-259-2374
Email: [email protected]

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.