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East Bay MUD

Published drinking-water records and contacts for East Bay MUD. System CA0110005. Review sources and dates; not a real-time water assessment.

System ID
CA0110005
State or territory
CA
Published population served
1442800
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/L2025-11-18Upper San Leandro WTP / 0110005803
4:2 FTS< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
6:2 FTS< 0.005 µg/L0.005 µg/L2025-11-18Upper San Leandro WTP / 0110005803
8:2 FTS< 0.005 µg/L0.005 µg/L2025-11-18Upper San Leandro WTP / 0110005803
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-11-18Upper San Leandro WTP / 0110005803
ADONA< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
HFPO-DA< 0.005 µg/L0.005 µg/L2025-11-18Upper San Leandro WTP / 0110005803
NEtFOSAA< 0.005 µg/L0.005 µg/L2025-12-16Upper San Leandro WTP / 0110005803
NFDHA< 0.02 µg/L0.02 µg/L2025-11-18Upper San Leandro WTP / 0110005803
NMeFOSAA< 0.006 µg/L0.006 µg/L2025-12-16Upper San Leandro WTP / 0110005803
PFBA< 0.005 µg/L0.005 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFBS< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFDA< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFDoA< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFEESA< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFHpA< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFHpS< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFHxA0.0035 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFHxS< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFMBA< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFMPA< 0.004 µg/L0.004 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFNA< 0.004 µg/L0.004 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFOA< 0.004 µg/L0.004 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFOS< 0.004 µg/L0.004 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFPeA< 0.003 µg/L0.003 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFPeS< 0.004 µg/L0.004 µg/L2025-11-18Upper San Leandro WTP / 0110005803
PFTA< 0.008 µg/L0.008 µg/L2025-12-16Upper San Leandro WTP / 0110005803
PFTrDA< 0.007 µg/L0.007 µg/L2025-12-16Upper San Leandro WTP / 0110005803
PFUnA< 0.002 µg/L0.002 µg/L2025-11-18Upper San Leandro WTP / 0110005803
lithium< 9 µg/L9 µg/L2025-11-18Upper San Leandro WTP / 0110005803

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) 0.0033 mg/L2019-01-01 – 2021-12-312026Q3
Lead (PB90) 0 mg/L2016-01-01 – 2018-12-312026Q3
Lead (PB90) 0 mg/L2015-01-01 – 2017-12-312026Q3
Lead (PB90) 0.003 mg/L2012-01-01 – 2014-12-312026Q3
Lead (PB90) 0.007 mg/L2009-01-01 – 2011-12-312026Q3
Lead (PB90) 0.004 mg/L2006-01-01 – 2008-12-312026Q3
Lead (PB90) 0.005 mg/L2005-01-01 – 2005-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
PERCHLORATE< 0.500000000 UG/L2026-07-15BRIONES RESERVOIR / California DDW laboratory results
PERCHLORATE< 0.500000000 UG/L2026-07-15PARDEE RESERVOIR / California DDW laboratory results
PERCHLORATE< 0.500000000 UG/L2026-07-08SAN PABLO RESERVOIR - SOBRANTE INTAKE / California DDW laboratory results
NITRATE-NITRITE< 0.400000000 MG/L2026-06-30LAFAYETTE WTP / California DDW laboratory results
FLUORIDE0.73 MG/L2026-06-30LAFAYETTE WTP / California DDW laboratory results
NITRATE< 0.400000000 MG/L2026-06-30WALNUT CREEK WTP / California DDW laboratory results
NITRATE-NITRITE< 0.400000000 MG/L2026-06-30ORINDA WTP / California DDW laboratory results
NITRITE< 0.400000000 MG/L2026-06-30ORINDA WTP / California DDW laboratory results
NITRATE-NITRITE< 0.400000000 MG/L2026-06-30WALNUT CREEK WTP / California DDW laboratory results
NITRITE< 0.400000000 MG/L2026-06-30LAFAYETTE WTP / California DDW laboratory results
FLUORIDE0.72 MG/L2026-06-30WALNUT CREEK WTP / California DDW laboratory results
FLUORIDE0.78 MG/L2026-06-30ORINDA WTP / 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)

Cortez, Roberto: 510-287-1035

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