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PublicWater Watch

City of Manteca

Published drinking-water records and contacts for City of Manteca. System CA3910005. Review sources and dates; not a real-time water assessment.

System ID
CA3910005
State or territory
CA
Published population served
84928
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/L2025-10-21SSJID Intertie / 3910005046
4:2 FTS< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
6:2 FTS< 0.005 µg/L0.005 µg/L2025-10-21SSJID Intertie / 3910005046
8:2 FTS< 0.005 µg/L0.005 µg/L2025-10-21SSJID Intertie / 3910005046
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-10-21SSJID Intertie / 3910005046
ADONA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
HFPO-DA< 0.005 µg/L0.005 µg/L2025-10-21SSJID Intertie / 3910005046
NEtFOSAA< 0.005 µg/L0.005 µg/L2025-10-21SSJID Intertie / 3910005046
NFDHA< 0.02 µg/L0.02 µg/L2025-10-21SSJID Intertie / 3910005046
NMeFOSAA< 0.006 µg/L0.006 µg/L2025-10-21SSJID Intertie / 3910005046
PFBA< 0.005 µg/L0.005 µg/L2025-10-21SSJID Intertie / 3910005046
PFBS< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFDA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFDoA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFEESA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFHpA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFHpS< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFHxA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFHxS< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFMBA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFMPA< 0.004 µg/L0.004 µg/L2025-10-21SSJID Intertie / 3910005046
PFNA< 0.004 µg/L0.004 µg/L2025-10-21SSJID Intertie / 3910005046
PFOA< 0.004 µg/L0.004 µg/L2025-10-21SSJID Intertie / 3910005046
PFOS< 0.004 µg/L0.004 µg/L2025-10-21SSJID Intertie / 3910005046
PFPeA< 0.003 µg/L0.003 µg/L2025-10-21SSJID Intertie / 3910005046
PFPeS< 0.004 µg/L0.004 µg/L2025-10-21SSJID Intertie / 3910005046
PFTA< 0.008 µg/L0.008 µg/L2025-10-21SSJID Intertie / 3910005046
PFTrDA< 0.007 µg/L0.007 µg/L2025-10-21SSJID Intertie / 3910005046
PFUnA< 0.002 µg/L0.002 µg/L2025-10-21SSJID Intertie / 3910005046
lithium< 9 µg/L9 µg/L2025-10-21SSJID Intertie / 3910005046

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) 0.0004 mg/L2022-01-01 – 2024-12-312026Q3
Lead (PB90) 0.0004 mg/L2019-01-01 – 2021-12-312026Q3
Lead (PB90) 0.0007 mg/L2016-01-01 – 2018-12-312026Q3
Lead (PB90) 0.0011 mg/L2013-01-01 – 2015-12-312026Q3
Lead (PB90) 0.0025 mg/L2010-01-01 – 2012-12-312026Q3
Lead (PB90) 0.0014 mg/L2009-01-01 – 2009-12-312026Q3
Lead (PB90) 0 mg/L2006-01-01 – 2006-12-312026Q3
Lead (PB90) 0.005 mg/L2006-01-01 – 2006-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
ARSENIC< 2.000000000 UG/L2026-06-30WELL NO. 29 - SORB 33 FILTER EFFLUENT-AS / California DDW laboratory results
NITRATE1.5 MG/L2026-06-30BLENDED EFF-WELL 24-ATHERTON TNK-AS & N / California DDW laboratory results
ARSENIC< 2.000000000 UG/L2026-06-30WELL NO. 30 - FILTER EFFLUENT / California DDW laboratory results
NITRATE5.6 MG/L2026-06-30GAC EFFLUENT FOR WELLS 13 & 19 AT CATF / California DDW laboratory results
MANGANESE4.8 UG/L2026-06-30WELL NO. 14 - RAW / California DDW laboratory results
ARSENIC< 2.000000000 UG/L2026-06-30WELL NO. 25 - FILTER EFFLUENT / California DDW laboratory results
ARSENIC12.2 UG/L2026-06-30WELL NO. 24 - RAW TO GAC / California DDW laboratory results
NITRATE5.4 MG/L2026-06-30GAC EFF - WELL 24 - ATHERTON TANK-123TCP / California DDW laboratory results
NITRATE5.5 MG/L2026-06-30CATF - BLENDED EFFLUENT / California DDW laboratory results
ARSENIC6 UG/L2026-06-30WELL NO. 25 - BLENDED EFFLUENT / California DDW laboratory results
ARSENIC4.2 UG/L2026-06-30WELL NO. 29 - BLENDED EFFLUENT / California DDW laboratory results
ARSENIC5.3 UG/L2026-06-30CATF - BLENDED EFFLUENT / 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

10 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 / Monitoring, Regular2024-01-01 – 2024-12-31ResolvedNo2026Q3
Miscellaneous Other Rules / Notification, Public1987-07-01 – 1987-07-31ArchivedNo2026Q3
Arsenic Rule / Maximum Contaminant Level Violation, Single Sample1987-07-01 – 1987-07-31ArchivedYes2026Q3
Arsenic Rule / Monitoring, Regular1987-07-01 – 1987-07-31ArchivedNo2026Q3
Inorganic Chemicals / Maximum Contaminant Level Violation, Single Sample1987-07-01 – 1987-07-31ArchivedYes2026Q3
Inorganic Chemicals / Monitoring, Regular1987-07-01 – 1987-07-31ArchivedNo2026Q3
Nitrate Rule / Maximum Contaminant Level Violation, Single Sample1987-07-01 – 1987-07-31ArchivedYes2026Q3
Nitrate Rule / Monitoring, Regular1987-07-01 – 1987-07-31ArchivedNo2026Q3
Inorganic Chemicals / Maximum Contaminant Level Violation, Single Sample1987-07-01 – 1987-07-31ArchivedYes2026Q3
Inorganic Chemicals / Monitoring, Regular1987-07-01 – 1987-07-31ArchivedNo2026Q3

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)

Montross, George: 209-456-8468

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