Tap Water Lookup

County · California

Humboldt County, California: drinking water records

Explore EPA records for 46 community water systems across 35 ZIP codes in Humboldt County, then find water-testing resources and available recent monitoring-station readings.

In focus46Community water systems
Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 8 of the 46 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

8
systems in EPA's PFAS survey
0
systems where PFAS was found
0
systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses
18
systems that have reached the lead action level
15
systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 46 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water systemPeople servedPFAS survey resultsPFAS foundHealth-based violationsLead, 9 in 10 homes at or below
Eureka, City of CA121000427,07860002.3 ppb
Arcata, City of CA121000120,87560003.6 ppb
Humboldt C.S.D. CA121000919,807240002.1 ppb
Mckinleyville C.S.D. CA121001616,90060001.6 ppb
Fortuna, City of CA121000612,13360001.8 ppb
Hoopa Valley-Wide System 0906051263,500120002.5 ppb
Rio Dell, City of CA12100123,300180000 ppb
Hydesville Co. W.D. CA12100191,3660012 ppb
Willow Creek C.S.D. CA12100151,2980020 ppb
Blue Lake, City of CA12100021,17260000 ppb
Trinidad, City of CA12100181,0720011.5 ppb
Scotia CSD CA12100106810030 ppb
Orleans C.S.D. CA12007296360032.6 ppb
Weott C.S.D. CA12005534480011.6 ppb
Myers Flat M.W.S. INC. CA12005383300011.8 ppb
Palmer Creek CSD CA12060043200018.8 ppb
Alderpoint County Water CA12005011900012.6 ppb
Phillipsville C.S.D. CA12005411240024.4 ppb
Redcrest Water Works CA12005441160013.2 ppb
Mill Creek M.W.C. CA1200547850010 ppb
Orleans Mutual Water Company CA1200566850010 ppb
Palomino Estates Water Company CA1206002640033.8 ppb
Riverbend Mobile Home Park CA12006876000112.9 ppb
Garberville Sanitary District CA12100082,0410000 ppb
Fieldbrook Glendale C.S.D. CA12100201,8450000 ppb
Del Oro Water Co-Ferndale CA12100071,6620003.5 ppb
Redway C.S.D. CA12100111,2070002.1 ppb
Jacoby Creek Cwd CA12100219240001.4 ppb
Loleta C.S.D. CA12100238280002.7 ppb
Resort Improvement District #1 CA12100228030001.3 ppb
Manila Community Services Dist. CA12100177500002.1 ppb
Humboldt Bay MWD CA12100136800001.6 ppb
Miranda C.S.D. CA12007074920001.7 ppb
Westhaven C.S.D. CA12100244900002.2 ppb
Orick C.S.D. CA12007013960007.4 ppb
Benbow-Del Oro W.C. CA12006713470000 ppb
Riverside CSD CA12005183330000 ppb
Green Diamond Resource Company - Korbel CA12007152500000 ppb
Trinidad Extended Stay RV CA12007061300000 ppb
Big Lagoon CSD CA12005921120004.3 ppb
Briceland C.S.D. CA1200587750000.5 ppb
Waddington W.W. CA1200718750000.8 ppb
Big Lagoon Park Water Co. CA1200591700000.8 ppb
Beach Creek Mobile Home Park CA12006436700015 ppbat or above the action level
Seawood Estates Mutual Water Company CA1200588630000 ppb
Moonstone Heights Mwa CA1200590330002.2 ppb

Shaded rows report lead at or above the 15 ppb action level in their latest monitoring period. EPA sets that level for the value 9 in 10 sampled homes fall at or below; reaching it requires the utility to act, and it is not a measurement of any single tap. One system in this table is at or above it. What an action level means

USGS · Monitoring stations

The water, more recently.

Available station readings in Humboldt County, California. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

Station coverage and available measurements vary by county.

Explore USGS Water Data
How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed · Source updated

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Humboldt County

35ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

  • Alderpoint
  • Arcata
  • Benbow
  • Blue Lake
  • Eureka
  • Ferndale
  • Fields Landing
  • Fortuna
  • Hoopa
  • Hydesville
  • Indianola
  • Loleta
  • Mad River
  • McKinleyville
  • Miranda
  • Myers Flat
  • Orick
  • Phillipsville
  • Pine Hills
  • Redcrest
  • Redway
  • Rio Dell
  • Samoa
  • Scotia
  • Shelter Cove
  • Weott
  • Westhaven-Moonstone
  • Willow Creek
Explore water-system recordsFind water-testing resources
View ZIP areas and understand coverage
  • 95501Eureka
  • 95503Pine Hills
  • 95511Alderpoint
  • 95514
  • 95519McKinleyville
  • 95521Arcata
  • 95524Indianola
  • 95525Blue Lake
  • 95526Mad River
  • 95528
  • 95536Ferndale
  • 95537Fields Landing
  • 95540Fortuna
  • 95542Benbow
  • 95545
  • 95546Hoopa
  • 95547Hydesville
  • 95549
  • 95550
  • 95551Loleta
  • 95553Miranda
  • 95554Myers Flat
  • 95555Orick
  • 95556
  • 95558
  • 95559Phillipsville
  • 95560Redway
  • 95562Rio Dell
  • 95564Samoa
  • 95565Scotia
  • 95569Redcrest
  • 95570Westhaven-Moonstone
  • 95571Weott
  • 95573Willow Creek
  • 95589Shelter Cove

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASReading PFAS survey resultsWhat a detection, a reporting level and a yearly average mean in EPA’s PFAS survey records.LeadChoosing a lead filter18 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Humboldt County

All California counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.

Keep exploring

Every record tells
part of the story.

Find a place. Read the measurements.
Understand the context.

Explore water records