County · Oregon

Columbia County, Oregon: drinking water records

Name: Drinking water records for Columbia County, Oregon
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 37 community water systems across 8 ZIP codes in Columbia County, then find water-testing resources and available recent monitoring-station readings.

In focus37Community 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 2 of the 37 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

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

Water system	People served	PFAS survey results	PFAS found	Health-based violations	Lead, 9 in 10 homes at or below
Scappoose, City of OR4100792	8,710	180	0	1	0 ppbbelow the action level
St Helens, City of OR4100724	13,410	120	1	0	1.0 ppbbelow the action level
Mcnulty Water PUD OR4100725	2,500	0	0	3	0 ppbbelow the action level
Vernonia, City of OR4100922	2,100	0	0	1	0 ppbbelow the action level
Western Hills Mh Estates OR4101172	375	0	0	5	0 ppbbelow the action level
Fishhawk Lake Reserve and Community OR4100124	350	0	0	1	0 ppbbelow the action level
Midland Water Association OR4101139	160	0	0	15	0 ppbbelow the action level
Columbia Acres Water Assoc OR4101148	110	0	0	1	3.3 ppbbelow the action level
Deer Island Waterworks OR4101233	90	0	0	3	5.5 ppbbelow the action level
Paradise Moorage OR4101423	90	0	0	1	0 ppbbelow the action level
Goble Water Association OR4100690	85	0	0	1	0 ppbbelow the action level
Tamarack Mobile Home Park OR4101310	80	0	0	1	0 ppbbelow the action level
Maple Terrace Mobile Home Park OR4100983	70	0	0	3	0 ppbbelow the action level
Marshland Water Association OR4101449	70	0	0	5	0 ppbbelow the action level
Prescott, City of OR4100692	70	0	0	2	1 ppbbelow the action level
Deer Island Heights Ws OR4105114	60	0	0	3	1 ppbbelow the action level
Cedar Tree Mobile Home Park OR4101043	50	0	0	2	2 ppbbelow the action level
Deer Island Village MHP OR4100982	50	0	0	1	2.3 ppbbelow the action level
Berndt Creek Water Corp OR4105737	45	0	0	1	0.9 ppbbelow the action level
J & M Mobile Home Park OR4100688	45	0	0	3	1 ppbbelow the action level
Hogg Heaven MHP OR4101041	40	0	0	1	2.4 ppbbelow the action level
Swedetown Water Assoc OR4101495	40	0	0	1	0 ppbbelow the action level
Clatskanie, City of OR4100194	2,188	0	0	0	1.3 ppbbelow the action level
Warren Water Association OR4100726	2,050	0	0	0	0 ppbbelow the action level
Columbia City Mun Waterworks OR4100203	1,995	0	0	0	0 ppbbelow the action level
City of Rainier OR4100689	1,932	0	0	0	0 ppbbelow the action level
Quincy Water Association OR4100196	300	0	0	0	0 ppbbelow the action level
Lost Creek Heights Wtr Assoc OR4101304	100	0	0	0	0 ppbbelow the action level
Country Villa Mobile Estates OR4100793	90	0	0	0	0 ppbbelow the action level
Deer View Cooperative OR4101046	90	0	0	0	0.2 ppbbelow the action level
Columbia Hills HOA OR4106118	84	0	0	0	6.2 ppbbelow the action level
Laurel Ridge MHP OR4101311	70	0	0	0	5.6 ppbbelow the action level
Mccuddys Landing OR4106090	70	0	0	0	0 ppbbelow the action level
Laurelwood Water Assoc OR4100691	50	0	0	0	18.5 ppbat or above the action level
Dikeside Moorage OR4101411	45	0	0	0	2 ppbbelow the action level
Westland Water Association OR4101474	25	0	0	0	1.3 ppbbelow the action level
Deer Island Village Mhp-Fawn Lane OR4101567	50	0	0	0	not reported

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 Columbia County, Oregon. 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.

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 2026-09-15 · Source updated 2026-08-05

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 2026-09-15 · Source updated 2026-08-11

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 2026-09-15 · Source updated 2026-09-09

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 2026-09-15

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 Columbia County

8ZIP 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

Clatskanie
Columbia City
Deer Island
Rainier
Scappoose
St. Helens
Vernonia
Warren

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

97016Clatskanie
97018Columbia City
97048Rainier
97051St. Helens
97053Warren
97054Deer Island
97056Scappoose
97064Vernonia

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.

PFASChoosing a PFAS filterPFAS was found in 1 of the 2 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter15 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 Columbia County

All Oregon 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.