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Cal-Water Service Co.-Chico

Published drinking-water records and contacts for Cal-Water Service Co.-Chico. System CA0410002. Review sources and dates; not a real-time water assessment.

System ID
CA0410002
State or territory
CA
Published population served
114925
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/L2024-07-23Well 34-1 (GWRMP) / 0410002819
4:2 FTS< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
6:2 FTS< 0.005 µg/L0.005 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
8:2 FTS< 0.005 µg/L0.005 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
ADONA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
HFPO-DA< 0.005 µg/L0.005 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
NFDHA< 0.02 µg/L0.02 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFBA< 0.005 µg/L0.005 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFBS< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFDA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFDoA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFEESA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFHpA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFHpS< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFHxA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFHxS< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFMBA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFMPA< 0.004 µg/L0.004 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFNA< 0.004 µg/L0.004 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFOA< 0.004 µg/L0.004 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFOS< 0.004 µg/L0.004 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFPeA< 0.003 µg/L0.003 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFPeS< 0.004 µg/L0.004 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFTA< 0.008 µg/L0.008 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFTrDA< 0.007 µg/L0.007 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
PFUnA< 0.002 µg/L0.002 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819
lithium< 9 µg/L9 µg/L2024-07-23Well 34-1 (GWRMP) / 0410002819

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/L2021-01-01 – 2023-12-312026Q3
Lead (PB90) 0.00126 mg/L2018-01-01 – 2020-12-312026Q3
Lead (PB90) 0.00126 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/L2011-01-01 – 2013-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
PERFLUOROBUTANE SULFONIC ACID (PFBS)2.0 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
DIQUAT< 0.390000000 UG/L2026-07-09WELL 39-01 / California DDW laboratory results
PERFLUORO PFMBA< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
PERFLUOROHEPTANOIC ACID (PFHPA)< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
PARAQUAT< 2.000000000 UG/L2026-07-09WELL 54-01 / California DDW laboratory results
PERFLUOROTRIDECANOIC ACID (PFTRDA)< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
PERFLUORODODECANOIC ACID (PFDOA)< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
NMEFOSAA< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
PERFLUOROHEPTANOIC ACID (PFHPA)< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
PERFLUOROUNDECANOIC ACID (PFUNA)< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
PERFLUOROBUTANOIC ACID (PFBA)< 2.000000000 NG/L2026-07-09WELL 28-01 / California DDW laboratory results
ADONA< 2.000000000 NG/L2026-07-09WELL 28-01 / 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)

Henrie, Tarrah: 408-367-8490

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