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Humboldt C.S.D.

Published drinking-water records and contacts for Humboldt C.S.D.. System CA1210009. Review sources and dates; not a real-time water assessment.

System ID
CA1210009
State or territory
CA
Published population served
19807
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/L2025-09-16Spruce Point Well / 1210009802
4:2 FTS< 0.003 µg/L0.003 µg/L2025-09-16New South Bay Well / 1210009804
6:2 FTS< 0.005 µg/L0.005 µg/L2025-09-16Hubbard WBS / 1210009806
8:2 FTS< 0.005 µg/L0.005 µg/L2025-09-16Truesdale WBS / 1210009805
9Cl-PF3ONS< 0.002 µg/L0.002 µg/L2025-09-16Truesdale WBS / 1210009805
ADONA< 0.003 µg/L0.003 µg/L2025-09-16New South Bay Well / 1210009804
HFPO-DA< 0.005 µg/L0.005 µg/L2025-09-16New South Bay Well / 1210009804
NEtFOSAA< 0.005 µg/L0.005 µg/L2025-09-16Truesdale WBS / 1210009805
NFDHA< 0.02 µg/L0.02 µg/L2025-09-16Hubbard WBS / 1210009806
NMeFOSAA< 0.006 µg/L0.006 µg/L2025-09-16Truesdale WBS / 1210009805
PFBA< 0.005 µg/L0.005 µg/L2025-09-16New South Bay Well / 1210009804
PFBS< 0.003 µg/L0.003 µg/L2025-09-16Truesdale WBS / 1210009805
PFDA< 0.003 µg/L0.003 µg/L2025-09-16Spruce Point Well / 1210009802
PFDoA< 0.003 µg/L0.003 µg/L2025-09-16Truesdale WBS / 1210009805
PFEESA< 0.003 µg/L0.003 µg/L2025-09-16Hubbard WBS / 1210009806
PFHpA< 0.003 µg/L0.003 µg/L2025-09-16Spruce Point Well / 1210009802
PFHpS< 0.003 µg/L0.003 µg/L2025-09-16New South Bay Well / 1210009804
PFHxA< 0.003 µg/L0.003 µg/L2025-09-16Hubbard WBS / 1210009806
PFHxS< 0.003 µg/L0.003 µg/L2025-09-16New South Bay Well / 1210009804
PFMBA< 0.003 µg/L0.003 µg/L2025-09-16Truesdale WBS / 1210009805
PFMPA< 0.004 µg/L0.004 µg/L2025-09-16Truesdale WBS / 1210009805
PFNA< 0.004 µg/L0.004 µg/L2025-09-16New South Bay Well / 1210009804
PFOA< 0.004 µg/L0.004 µg/L2025-09-16New South Bay Well / 1210009804
PFOS< 0.004 µg/L0.004 µg/L2025-09-16New South Bay Well / 1210009804
PFPeA< 0.003 µg/L0.003 µg/L2025-09-16New South Bay Well / 1210009804
PFPeS< 0.004 µg/L0.004 µg/L2025-09-16New South Bay Well / 1210009804
PFTA< 0.008 µg/L0.008 µg/L2025-09-16Spruce Point Well / 1210009802
PFTrDA< 0.007 µg/L0.007 µg/L2025-09-16Spruce Point Well / 1210009802
PFUnA< 0.002 µg/L0.002 µg/L2025-09-16Spruce Point Well / 1210009802
lithium< 9 µg/L9 µg/L2025-09-16Spruce Point Well / 1210009802

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) 0.00205 mg/L2023-01-01 – 2025-12-312026Q3
Lead (PB90) 0.00314 mg/L2020-01-01 – 2022-12-312026Q3
Lead (PB90) 0.004 mg/L2017-01-01 – 2019-12-312026Q3
Lead (PB90) 0.0033 mg/L2014-01-01 – 2016-12-312026Q3
Lead (PB90) 0.0035 mg/L2011-01-01 – 2013-12-312026Q3
Lead (PB90) 0.0049 mg/L2008-01-01 – 2010-12-312026Q3
Lead (PB90) 0.0036 mg/L2005-01-01 – 2007-12-312026Q3
Lead (PB90) 0.015 mg/L2004-01-01 – 2004-12-312026Q3
Twelve most recent imported state laboratory records
SubstancePublished resultSample dateLocation / source
CHROMIUM, HEX2.5 UG/L2026-06-26SOUTH BAY WELL (2018) - RAW / California DDW laboratory results
TRICHLOROACETIC ACID3.20 UG/L2026-06-25DBPR Sample / California DDW laboratory results
MONOBROMOACETIC ACID< 1.000000000 UG/L2026-06-25DBPR Sample / California DDW laboratory results
DIBROMOACETIC ACID< 1.000000000 UG/L2026-06-25DBPR Sample / California DDW laboratory results
DIBROMOCHLOROMETHANE1.50 UG/L2026-06-25DBPR Sample / California DDW laboratory results
DICHLOROACETIC ACID< 1.000000000 UG/L2026-06-25DBPR Sample / California DDW laboratory results
MONOBROMOACETIC ACID< 1.000000000 UG/L2026-06-25DBPR Sample / California DDW laboratory results
TOTAL HALOACETIC ACIDS (HAA5)< 6.000000000 UG/L2026-06-25DBPR Sample / California DDW laboratory results
TOTAL HALOACETIC ACIDS (HAA5)< 6.000000000 UG/L2026-06-25DBPR Sample / California DDW laboratory results
CHLOROFORM9.00 UG/L2026-06-25DBPR Sample / California DDW laboratory results
MONOCHLOROACETIC ACID< 2.000000000 UG/L2026-06-25DBPR Sample / California DDW laboratory results
NITRATE< 0.100000000 MG/L2026-06-25SPRUCE POINT WELL - RAW / 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

2 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
Revised Total Coliform Rule / Monitoring, Routine (RTCR)2026-01-01 – 2026-03-31ResolvedNo2026Q3
Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R2025-10-01 – —UnaddressedNo2026Q3

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)

Williams, Terrence: 707-499-7974

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