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Cottonwood Water District

Published drinking-water records and contacts for Cottonwood Water District. System CA4510007. Review sources and dates; not a real-time water assessment.

System ID
CA4510007
State or territory
CA
Published population served
3316
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/L2024-10-09Well 01 / 001
4:2 FTS< 0.003 µg/L0.003 µg/L2024-10-09Well 04 / 004
6:2 FTS< 0.005 µg/L0.005 µg/L2024-10-09Well 05 / 005
8:2 FTS< 0.005 µg/L0.005 µg/L2024-10-09Well 02 / 002
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2024-10-09Well 05 / 005
ADONA< 0.003 µg/L0.003 µg/L2024-10-09Well 05 / 005
HFPO-DA< 0.005 µg/L0.005 µg/L2024-10-09Well 03 / 003
NEtFOSAA< 0.005 µg/L0.005 µg/L2024-10-09Well 03 / 003
NFDHA< 0.02 µg/L0.02 µg/L2024-10-09Well 05 / 005
NMeFOSAA< 0.006 µg/L0.006 µg/L2024-10-09Well 02 / 002
PFBA< 0.005 µg/L0.005 µg/L2024-10-09Well 05 / 005
PFBS< 0.003 µg/L0.003 µg/L2024-10-09Well 05 / 005
PFDA< 0.003 µg/L0.003 µg/L2024-10-09Well 01 / 001
PFDoA< 0.003 µg/L0.003 µg/L2024-10-09Well 01 / 001
PFEESA< 0.003 µg/L0.003 µg/L2024-10-09Well 03 / 003
PFHpA< 0.003 µg/L0.003 µg/L2024-10-09Well 04 / 004
PFHpS< 0.003 µg/L0.003 µg/L2024-10-09Well 02 / 002
PFHxA< 0.003 µg/L0.003 µg/L2024-10-09Well 05 / 005
PFHxS< 0.003 µg/L0.003 µg/L2024-10-09Well 05 / 005
PFMBA< 0.003 µg/L0.003 µg/L2024-10-09Well 02 / 002
PFMPA< 0.004 µg/L0.004 µg/L2024-10-09Well 04 / 004
PFNA< 0.004 µg/L0.004 µg/L2024-10-09Well 04 / 004
PFOA< 0.004 µg/L0.004 µg/L2024-10-09Well 02 / 002
PFOS< 0.004 µg/L0.004 µg/L2024-10-09Well 03 / 003
PFPeA< 0.003 µg/L0.003 µg/L2024-10-09Well 01 / 001
PFPeS< 0.004 µg/L0.004 µg/L2024-10-09Well 03 / 003
PFTA< 0.008 µg/L0.008 µg/L2024-10-09Well 02 / 002
PFTrDA< 0.007 µg/L0.007 µg/L2024-10-09Well 03 / 003
PFUnA< 0.002 µg/L0.002 µg/L2024-10-09Well 01 / 001
lithium< 9 µg/L9 µg/L2024-10-09Well 04 / 004

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/L2026-01-01 – 2026-12-312026Q3
Lead (PB90) 0.00107 mg/L2020-01-01 – 2022-12-312026Q3
Lead (PB90) 0 mg/L2017-01-01 – 2019-12-312026Q3
Lead (PB90) 0 mg/L2014-01-01 – 2016-12-312026Q3
Lead (PB90) 0 mg/L2012-01-01 – 2014-12-312026Q3
Lead (PB90) 0 mg/L2009-01-01 – 2011-12-312026Q3
Lead (PB90) 0 mg/L2006-01-01 – 2008-12-312026Q3
Lead (PB90) 0 mg/L2005-01-01 – 2007-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
COMBINED RADIUM (-226 & -228)< 1.670000000 PCI/L2026-05-26WELL 02 - RHONDA ROAD / California DDW laboratory results
RADIUM-228< 0.754000000 PCI/L2026-05-26WELL 05 - OAK ST. / California DDW laboratory results
COMBINED RADIUM (-226 & -228)< 1.240000000 PCI/L2026-05-26WELL 05 - OAK ST. / California DDW laboratory results
RADIUM-228< 0.839000000 PCI/L2026-05-26WELL 01 - OFFICE / California DDW laboratory results
RADIUM-228< 0.758000000 PCI/L2026-05-26WELL 02 - RHONDA ROAD / California DDW laboratory results
COMBINED RADIUM (-226 & -228)< 1.370000000 PCI/L2026-05-26WELL 01 - OFFICE / California DDW laboratory results
RADIUM-228< 0.716000000 PCI/L2026-05-26WELL 04 - FIRST STREET / California DDW laboratory results
COMBINED RADIUM (-226 & -228)< 0.888000000 PCI/L2026-05-26WELL 04 - FIRST STREET / California DDW laboratory results
RADIUM-226< 0.530000000 PCI/L2026-05-26WELL 01 - OFFICE / California DDW laboratory results
RADIUM-228< 0.713000000 PCI/L2026-05-26WELL 03 - ARROYO MANOR / California DDW laboratory results
RADIUM-2260.198 PCI/L2026-05-26WELL 03 - ARROYO MANOR / California DDW laboratory results
RADIUM-226< 0.172000000 PCI/L2026-05-26WELL 04 - FIRST STREET / 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
Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R2025-10-01 – —ResolvedNo2026Q3
Lead and Copper Rule Revisions / LSL Inventory2024-10-17 – —ResolvedYes2026Q3
Lead and Copper Rule Revisions / LSL Reporting2024-10-17 – —ResolvedNo2026Q3
Revised Total Coliform Rule / Treatment Technique, Level 1 Assessment (RTCR)2018-08-01 – —ResolvedYes2026Q3

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)

Hollmer, John: 530-347-3472

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