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PublicWater Watch

City of Millbrae

Published drinking-water records and contacts for City of Millbrae. System CA4110018. Review sources and dates; not a real-time water assessment.

System ID
CA4110018
State or territory
CA
Published population served
22795
System type (source code)
CWS

Published records and dates

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Read the provider’s annual water quality report

Report link listed: 2026-10-05. This is not the report’s sampling date.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
SubstancePublished resultReporting limitSample dateSampling location
11Cl-PF3OUdS< 0.005 µg/L0.005 µg/L2025-05-06SFWD Intertie / 4110018003
4:2 FTS< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
6:2 FTS< 0.005 µg/L0.005 µg/L2025-05-06SFWD Intertie / 4110018003
8:2 FTS< 0.005 µg/L0.005 µg/L2025-05-06SFWD Intertie / 4110018003
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-05-06SFWD Intertie / 4110018003
ADONA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
HFPO-DA< 0.005 µg/L0.005 µg/L2025-05-06SFWD Intertie / 4110018003
NEtFOSAA< 0.005 µg/L0.005 µg/L2025-05-06SFWD Intertie / 4110018003
NFDHA< 0.02 µg/L0.02 µg/L2025-05-06SFWD Intertie / 4110018003
NMeFOSAA< 0.006 µg/L0.006 µg/L2025-05-06SFWD Intertie / 4110018003
PFBA< 0.005 µg/L0.005 µg/L2025-05-06SFWD Intertie / 4110018003
PFBS< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFDA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFDoA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFEESA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFHpA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFHpS< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFHxA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFHxS< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFMBA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFMPA< 0.004 µg/L0.004 µg/L2025-05-06SFWD Intertie / 4110018003
PFNA< 0.004 µg/L0.004 µg/L2025-05-06SFWD Intertie / 4110018003
PFOA< 0.004 µg/L0.004 µg/L2025-05-06SFWD Intertie / 4110018003
PFOS< 0.004 µg/L0.004 µg/L2025-05-06SFWD Intertie / 4110018003
PFPeA< 0.003 µg/L0.003 µg/L2025-05-06SFWD Intertie / 4110018003
PFPeS< 0.004 µg/L0.004 µg/L2025-05-06SFWD Intertie / 4110018003
PFTA< 0.008 µg/L0.008 µg/L2025-05-06SFWD Intertie / 4110018003
PFTrDA< 0.007 µg/L0.007 µg/L2025-05-06SFWD Intertie / 4110018003
PFUnA< 0.002 µg/L0.002 µg/L2025-05-06SFWD Intertie / 4110018003
lithium< 9 µg/L9 µg/L2025-05-06SFWD Intertie / 4110018003

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
SubstancePublished 90th percentileMonitoring periodSource quarter
Lead (PB90) 0 mg/L2023-01-01 – 2025-12-312026Q3
Lead (PB90) 0.0055 mg/L2020-01-01 – 2022-12-312026Q3
Lead (PB90) 0.01 mg/L2017-01-01 – 2019-12-312026Q3
Lead (PB90) 0.0038 mg/L2016-01-01 – 2018-12-312026Q3
Lead (PB90) 0.0038 mg/L2016-01-01 – 2016-12-312026Q3
Lead (PB90) 0.0053 mg/L2013-01-01 – 2013-12-312026Q3
Lead (PB90) 0.008 mg/L2008-01-01 – 2010-12-312026Q3
Lead (PB90) 0.004 mg/L2005-01-01 – 2007-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
BROMOFORM< 1.000000000 UG/L2026-06-16DBPR Sample / California DDW laboratory results
BROMODICHLOROMETHANE1.18 UG/L2026-06-16DBPR Sample / California DDW laboratory results
TTHM48.4 UG/L2026-06-16DBPR Sample / California DDW laboratory results
BROMODICHLOROMETHANE4.63 UG/L2026-06-16DBPR Sample / California DDW laboratory results
TTHM18.2 UG/L2026-06-16DBPR Sample / California DDW laboratory results
DIBROMOCHLOROMETHANE3.02 UG/L2026-06-16DBPR Sample / California DDW laboratory results
TTHM18.2 UG/L2026-06-16DBPR Sample / California DDW laboratory results
DIBROMOCHLOROMETHANE< 1.000000000 UG/L2026-06-16DBPR Sample / California DDW laboratory results
CHLOROFORM47.3 UG/L2026-06-16DBPR Sample / California DDW laboratory results
TTHM19.4 UG/L2026-06-16DBPR Sample / California DDW laboratory results
TTHM48.5 UG/L2026-06-16DBPR Sample / California DDW laboratory results
BROMOFORM< 1.000000000 UG/L2026-06-16DBPR Sample / California DDW laboratory results

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

1 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / recordPeriodRecorded statusHealth-based (EPA classification)Source quarter
Stage 2 Disinfectants and Disinfection Byproducts Rule / Monitoring and Reporting (DBP)2026-04-01 – 2026-06-30ArchivedNo2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

Administrative contact (EPA filing)

Centis, Craig: 650-259-2374

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records