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Gswc - Willowbrook

Published drinking-water records and contacts for Gswc - Willowbrook. System CA1910072. Review sources and dates; not a real-time water assessment.

System ID
CA1910072
State or territory
CA
Published population served
10793
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.

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/L2025-03-26MWD Intertie / 1910072854
4:2 FTS< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
6:2 FTS< 0.005 µg/L0.005 µg/L2025-03-26MWD Intertie / 1910072854
8:2 FTS< 0.005 µg/L0.005 µg/L2025-03-26MWD Intertie / 1910072854
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-03-26MWD Intertie / 1910072854
ADONA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
HFPO-DA< 0.005 µg/L0.005 µg/L2025-03-26MWD Intertie / 1910072854
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-10-10MWD Intertie / 1910072854
NFDHA< 0.02 µg/L0.02 µg/L2025-03-26MWD Intertie / 1910072854
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-10-10MWD Intertie / 1910072854
PFBA< 0.005 µg/L0.005 µg/L2025-03-26MWD Intertie / 1910072854
PFBS< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFDA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFDoA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFEESA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFHpA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFHpS< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFHxA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFHxS< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFMBA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFMPA< 0.004 µg/L0.004 µg/L2025-03-26MWD Intertie / 1910072854
PFNA< 0.004 µg/L0.004 µg/L2025-03-26MWD Intertie / 1910072854
PFOA< 0.004 µg/L0.004 µg/L2025-03-26MWD Intertie / 1910072854
PFOS< 0.004 µg/L0.004 µg/L2025-03-26MWD Intertie / 1910072854
PFPeA< 0.003 µg/L0.003 µg/L2025-03-26MWD Intertie / 1910072854
PFPeS< 0.004 µg/L0.004 µg/L2025-03-26MWD Intertie / 1910072854
PFTA< 0.008 µg/L0.008 µg/L2024-10-10MWD Intertie / 1910072854
PFTrDA< 0.007 µg/L0.007 µg/L2024-10-10MWD Intertie / 1910072854
PFUnA< 0.002 µg/L0.002 µg/L2025-03-26MWD Intertie / 1910072854
lithium48 µg/L9 µg/L2025-03-26MWD Intertie / 1910072854

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 mg/L2020-01-01 – 2022-12-312026Q3
Lead (PB90) 0 mg/L2017-01-01 – 2019-12-312026Q3
Lead (PB90) 0 mg/L2014-01-01 – 2016-12-312026Q3
Lead (PB90) 0 mg/L2011-01-01 – 2013-12-312026Q3
Lead (PB90) 0 mg/L2008-01-01 – 2010-12-312026Q3
Lead (PB90) 0.002 mg/L2005-01-01 – 2007-12-312026Q3
Lead (PB90) 0.001 mg/L2002-01-01 – 2004-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
MONOBROMOACETIC ACID< 1.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
CHLOROFORM< 1.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
TTHM4.7 UG/L2026-05-05DBPR Sample / California DDW laboratory results
MONOBROMOACETIC ACID< 1.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
TOTAL HALOACETIC ACIDS (HAA5)< 6.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
DICHLOROACETIC ACID< 1.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
MONOCHLOROACETIC ACID< 2.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
DIBROMOCHLOROMETHANE< 1.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
MONOBROMOACETIC ACID< 1.000000000 UG/L2026-05-05DBPR Sample / California DDW laboratory results
DIBROMOCHLOROMETHANE1.5 UG/L2026-05-05DBPR Sample / California DDW laboratory results
DIBROMOCHLOROMETHANE1.1 UG/L2026-05-05DBPR Sample / California DDW laboratory results
BROMODICHLOROMETHANE< 1.000000000 UG/L2026-05-05DBPR 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

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

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)

Flores, Rocio: 626-250-1517

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