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West Valley Water District

Published drinking-water records and contacts for West Valley Water District. System CA3610004. Review sources and dates; not a real-time water assessment.

System ID
CA3610004
State or territory
CA
Published population served
104498
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/L2023-10-02Roemer WTP / 3610004036
4:2 FTS< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
6:2 FTS< 0.005 µg/L0.005 µg/L2023-10-02Roemer WTP / 3610004036
8:2 FTS< 0.005 µg/L0.005 µg/L2023-10-02Roemer WTP / 3610004036
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2023-10-02Roemer WTP / 3610004036
ADONA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
HFPO-DA< 0.005 µg/L0.005 µg/L2023-10-02Roemer WTP / 3610004036
NEtFOSAA< 0.005 µg/L0.005 µg/L2023-10-02Roemer WTP / 3610004036
NFDHA< 0.02 µg/L0.02 µg/L2023-10-02Roemer WTP / 3610004036
NMeFOSAA< 0.006 µg/L0.006 µg/L2023-10-02Roemer WTP / 3610004036
PFBA< 0.005 µg/L0.005 µg/L2023-10-02Roemer WTP / 3610004036
PFBS< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFDA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFDoA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFEESA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFHpA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFHpS< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFHxA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFHxS< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFMBA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFMPA< 0.004 µg/L0.004 µg/L2023-10-02Roemer WTP / 3610004036
PFNA< 0.004 µg/L0.004 µg/L2023-10-02Roemer WTP / 3610004036
PFOA< 0.004 µg/L0.004 µg/L2023-10-02Roemer WTP / 3610004036
PFOS< 0.004 µg/L0.004 µg/L2023-10-02Roemer WTP / 3610004036
PFPeA< 0.003 µg/L0.003 µg/L2023-10-02Roemer WTP / 3610004036
PFPeS< 0.004 µg/L0.004 µg/L2023-10-02Roemer WTP / 3610004036
PFTA< 0.008 µg/L0.008 µg/L2023-10-02Roemer WTP / 3610004036
PFTrDA< 0.007 µg/L0.007 µg/L2023-10-02Roemer WTP / 3610004036
PFUnA< 0.002 µg/L0.002 µg/L2023-10-02Roemer WTP / 3610004036
lithium< 9 µg/L9 µg/L2023-10-02Roemer WTP / 3610004036

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/L2022-01-01 – 2024-12-312026Q3
Lead (PB90) 0 mg/L2019-01-01 – 2021-12-312026Q3
Lead (PB90) 0 mg/L2016-01-01 – 2018-12-312026Q3
Lead (PB90) 0 mg/L2013-01-01 – 2015-12-312026Q3
Lead (PB90) 0.011 mg/L2010-01-01 – 2012-12-312026Q3
Lead (PB90) 0 mg/L2007-01-01 – 2009-12-312026Q3
Lead (PB90) 0 mg/L2004-01-01 – 2006-12-312026Q3
Lead (PB90) 0.0017 mg/L2006-01-01 – 2006-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
PERCHLORATE< 1.000000000 UG/L2026-07-20FBR WTS EFFLUENT / California DDW laboratory results
ODOR1 TON2026-07-13FBR WTS EFFLUENT / California DDW laboratory results
COLOR< 3.000000000 UNITS2026-07-13FBR WTS EFFLUENT / California DDW laboratory results
NITRATE7.5 MG/L2026-07-13WELL 42 / California DDW laboratory results
PERCHLORATE< 1.000000000 UG/L2026-07-13FBR WTS EFFLUENT / California DDW laboratory results
ALKALINITY, TOTAL160 MG/L2026-07-13FBR WTS EFFLUENT / California DDW laboratory results
PERCHLORATE4.7 UG/L2026-07-13WELL 42 / California DDW laboratory results
ALUMINUM< 50.000000000 UG/L2026-07-13ROEMER WTP EFFLUENT - TREATED / California DDW laboratory results
METHYL TERT-BUTYL ETHER< 3.000000000 UG/L2026-07-13RESERVOIR 4-3 BLEND EFFLUENT / California DDW laboratory results
CARBON, TOTAL2.9 MG/L2026-07-13ROEMER WTP INFLUENT / California DDW laboratory results
CARBON, TOTAL0.38 MG/L2026-07-13FBR WTS EFFLUENT / California DDW laboratory results
NITRATE7.5 MG/L2026-07-13WELL 42 - TREATED (PERCHLORATE) / 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

4 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
Nitrate Rule / Maximum Contaminant Level Violation, Single Sample1987-06-01 – 1987-06-30ArchivedYes2026Q3
Nitrate Rule / Maximum Contaminant Level Violation, Single Sample1987-05-01 – 1987-05-31ArchivedYes2026Q3
Nitrate Rule / Maximum Contaminant Level Violation, Single Sample1987-04-01 – 1987-04-30ArchivedYes2026Q3
Nitrate Rule / Maximum Contaminant Level Violation, Single Sample1987-03-01 – 1987-03-31ArchivedYes2026Q3

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)

Thiel, John: 909-875-3706

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