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Gswc - Artesia

Published drinking-water records and contacts for Gswc - Artesia. System CA1910004. Review sources and dates; not a real-time water assessment.

System ID
CA1910004
State or territory
CA
Published population served
50415
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/L2024-12-04Hawaiian Plant / 1910004808
4:2 FTS< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
6:2 FTS< 0.005 µg/L0.005 µg/L2024-12-04Hawaiian Plant / 1910004808
8:2 FTS< 0.005 µg/L0.005 µg/L2024-12-04Hawaiian Plant / 1910004808
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-12-04Hawaiian Plant / 1910004808
ADONA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
HFPO-DA< 0.005 µg/L0.005 µg/L2024-12-04Hawaiian Plant / 1910004808
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-12-04Hawaiian Plant / 1910004808
NFDHA< 0.02 µg/L0.02 µg/L2024-12-04Hawaiian Plant / 1910004808
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-12-04Hawaiian Plant / 1910004808
PFBA< 0.005 µg/L0.005 µg/L2024-12-04Hawaiian Plant / 1910004808
PFBS< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFDA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFDoA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFEESA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFHpA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFHpS< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFHxA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFHxS< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFMBA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFMPA< 0.004 µg/L0.004 µg/L2024-12-04Hawaiian Plant / 1910004808
PFNA< 0.004 µg/L0.004 µg/L2024-12-04Hawaiian Plant / 1910004808
PFOA< 0.004 µg/L0.004 µg/L2024-12-04Hawaiian Plant / 1910004808
PFOS< 0.004 µg/L0.004 µg/L2024-12-04Hawaiian Plant / 1910004808
PFPeA< 0.003 µg/L0.003 µg/L2024-12-04Hawaiian Plant / 1910004808
PFPeS< 0.004 µg/L0.004 µg/L2024-12-04Hawaiian Plant / 1910004808
PFTA< 0.008 µg/L0.008 µg/L2024-12-04Hawaiian Plant / 1910004808
PFTrDA< 0.007 µg/L0.007 µg/L2024-12-04Hawaiian Plant / 1910004808
PFUnA< 0.002 µg/L0.002 µg/L2024-12-04Hawaiian Plant / 1910004808
lithium< 9 µg/L9 µg/L2024-12-04Hawaiian Plant / 1910004808

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) 0.00066 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 mg/L2005-01-01 – 2007-12-312026Q3
Lead (PB90) 0.003 mg/L2004-01-01 – 2004-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
MANGANESE< 1.000000000 UG/L2026-07-13HAWAIIAN AS PLANT COMBINED EFFLUENT / California DDW laboratory results
ARSENIC5.5 UG/L2026-07-13HAWAIIAN AS PLANT COMBINED EFFLUENT / California DDW laboratory results
PERFLUOROBUTANE SULFONIC ACID (PFBS)< 1.600000000 NG/L2026-07-07ROSETON WELL 02 / California DDW laboratory results
ARSENIC5.9 UG/L2026-07-07HAWAIIAN AS ADSORPTION VESSEL 2 EFFLUENT / California DDW laboratory results
11CL-PF3OUDS< 1.600000000 NG/L2026-07-07ROSETON WELL 02 / California DDW laboratory results
ARSENIC6.7 UG/L2026-07-07HAWAIIAN AS ADSORPTION VESSEL 1 EFFLUENT / California DDW laboratory results
PERFLUOROBUTANOIC ACID (PFBA)1.8 NG/L2026-07-07ROSETON WELL 02 / California DDW laboratory results
PERFLUOROUNDECANOIC ACID (PFUNA)< 1.700000000 NG/L2026-07-07ROSETON WELL 01 / California DDW laboratory results
PERFLUOROUNDECANOIC ACID (PFUNA)< 1.600000000 NG/L2026-07-07ROSETON WELL 02 / California DDW laboratory results
PERFLUOROHEPTANOIC ACID (PFHPA)< 1.600000000 NG/L2026-07-07ROSETON WELL 02 / California DDW laboratory results
PERFLUORO PFEESA< 1.600000000 NG/L2026-07-07ROSETON WELL 02 / California DDW laboratory results
PERFLUORO PFMBA< 1.600000000 NG/L2026-07-07ROSETON WELL 02 / 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
Miscellaneous Other Rules / Notification, Public1988-09-01 – 1988-09-30ArchivedNo2026Q3

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)

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