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PublicWater Watch

City of Ripon

Published drinking-water records and contacts for City of Ripon. System CA3910007. Review sources and dates; not a real-time water assessment.

System ID
CA3910007
State or territory
CA
Published population served
15741
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/L2025-01-14Well 3 / 3910007808
4:2 FTS< 0.003 µg/L0.003 µg/L2025-01-14Well 13 / 3910007804
6:2 FTS< 0.005 µg/L0.005 µg/L2025-01-14Well 7 / 3910007807
8:2 FTS< 0.005 µg/L0.005 µg/L2025-01-14Well 3 / 3910007808
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-01-14Well 3 / 3910007808
ADONA< 0.003 µg/L0.003 µg/L2025-01-14Well 18 / 3910007803
HFPO-DA< 0.005 µg/L0.005 µg/L2025-01-14Well 3 / 3910007808
NEtFOSAA< 0.005 µg/L0.005 µg/L2025-01-14Well 10 / 3910007806
NFDHA< 0.02 µg/L0.02 µg/L2025-01-14Well 18 / 3910007803
NMeFOSAA< 0.006 µg/L0.006 µg/L2025-01-14Well 7 / 3910007807
PFBA< 0.005 µg/L0.005 µg/L2025-01-14Well 10 / 3910007806
PFBS< 0.003 µg/L0.003 µg/L2025-01-14Well 10 / 3910007806
PFDA< 0.003 µg/L0.003 µg/L2025-01-14Well 7 / 3910007807
PFDoA< 0.003 µg/L0.003 µg/L2025-01-14Well 7 / 3910007807
PFEESA< 0.003 µg/L0.003 µg/L2025-01-14Well 18 / 3910007803
PFHpA< 0.003 µg/L0.003 µg/L2025-01-14Well 10 / 3910007806
PFHpS< 0.003 µg/L0.003 µg/L2025-01-14Well 7 / 3910007807
PFHxA< 0.003 µg/L0.003 µg/L2025-01-14Well 3 / 3910007808
PFHxS< 0.003 µg/L0.003 µg/L2025-01-14Well 13 / 3910007804
PFMBA< 0.003 µg/L0.003 µg/L2025-01-14Well 10 / 3910007806
PFMPA< 0.004 µg/L0.004 µg/L2025-01-14Well 13 / 3910007804
PFNA< 0.004 µg/L0.004 µg/L2025-01-14Well 18 / 3910007803
PFOA< 0.004 µg/L0.004 µg/L2025-01-14Well 18 / 3910007803
PFOS< 0.004 µg/L0.004 µg/L2025-01-14Well 7 / 3910007807
PFPeA< 0.003 µg/L0.003 µg/L2025-01-14Well 13 / 3910007804
PFPeS< 0.004 µg/L0.004 µg/L2025-01-14Well 7 / 3910007807
PFTA< 0.008 µg/L0.008 µg/L2025-01-14Well 7 / 3910007807
PFTrDA< 0.007 µg/L0.007 µg/L2025-01-14Well 13 / 3910007804
PFUnA< 0.002 µg/L0.002 µg/L2025-01-14Well 3 / 3910007808
lithium< 9 µg/L9 µg/L2025-01-14Well 3 / 3910007808

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/L2024-01-01 – 2026-12-312026Q3
Lead (PB90) 0 mg/L2021-01-01 – 2023-12-312026Q3
Lead (PB90) 0 mg/L2018-01-01 – 2020-12-312026Q3
Lead (PB90) 0 mg/L2015-01-01 – 2017-12-312026Q3
Lead (PB90) 0 mg/L2012-01-01 – 2014-12-312026Q3
Lead (PB90) 0 mg/L2009-01-01 – 2011-12-312026Q3
Lead (PB90) 0 mg/L2008-01-01 – 2008-12-312026Q3
Lead (PB90) 0.005 mg/L2006-01-01 – 2006-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
NITRATE3.7 MG/L2026-07-07WELL NO. 10 / California DDW laboratory results
AGGRESSIVE INDEX12.1 AGGR2026-06-02WELL NO. 10 / California DDW laboratory results
SIMAZINE< 1.000000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
STYRENE< 0.500000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
TDS840 MG/L2026-06-02WELL NO. 10 / California DDW laboratory results
PERCHLORATE< 1.000000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
1,2,4-TRICHLOROBENZENE< 0.500000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
TETRACHLOROETHYLENE< 0.500000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
1,2-DIBROMO-3-CHLOROPROPANE< 0.010000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
MERCURY< 1.000000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
SILVER< 10.000000000 UG/L2026-06-02WELL NO. 10 / California DDW laboratory results
1,1-DICHLOROETHANE< 0.500000000 UG/L2026-06-02WELL NO. 10 / 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

6 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, Public1989-08-01 – 1989-08-31ArchivedNo2026Q3
Arsenic Rule / Monitoring, Regular1988-11-01 – 1988-11-30ArchivedNo2026Q3
Inorganic Chemicals / Monitoring, Regular1988-11-01 – 1988-11-30ArchivedNo2026Q3
Nitrate Rule / Monitoring, Regular1988-11-01 – 1988-11-30ArchivedNo2026Q3
Inorganic Chemicals / Monitoring, Regular1988-11-01 – 1988-11-30ArchivedNo2026Q3
Miscellaneous Other Rules / Notification, Public1988-11-01 – 1988-11-30ArchivedNo2026Q3

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)

Pease, James: 209-599-2108

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