Public water system · OR4100792

Active

Scappoose, City of

At a glance

City of Scappoose (PWSID OR4100792) is an active community water system in Columbia County, Oregon. It reports serving 8,710 people through 2,793 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

8,710

Service connections

2,793

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDOR4100792

System typeCommunity water system

Activity statusActive

Population served8,710

Service connections2,793

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyOR state drinking water program

City served—

StateOregon

ZIP—

CountyColumbia County

How does City of Scappoose compare with other water systems in Columbia County?

By EPA's size categories, City of Scappoose is a medium system (3,301 to 10,000 people). Columbia County has 57 active public water systems, and City of Scappoose is the 2nd-largest of them by population served. Its population served is about 12 times the county average of 705 people per system, and accounts for 22% of the 40,191 people reported by systems filed under the county. Across Oregon, the 2,536 active systems average 1,587 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Scappoose is about 30% above that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Oregon has 940 active community water systems, 37% of the state's 2,536 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 211 Oregon systems (8.3%) list surface water as their primary source.

Who owns and regulates City of Scappoose?

EPA lists City of Scappoose as owned by a local government. The OR state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 13 of the 57 active systems in Columbia County (23%) are also owned by a local government.

Does City of Scappoose have drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2024. The violations listed here began between January 2012 and July 2024. By type: 10 monitoring and reporting, 1 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.

Began	Violation	Contaminant or rule	Health-based	Status
2024-07-01	Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56	Lead and Copper Rulecode 5000	No	Resolved
2023-10-01	Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43	Interim Enhanced Surface Water Treatment Rulecode 0300	Yes	Resolved
2023-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2021-07-01	Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56	Lead and Copper Rulecode 5000	No	Resolved
2021-07-01	Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56	Lead and Copper Rulecode 5000	No	Resolved
2016-02-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2016-02-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2016-02-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2013-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2013-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2013-07-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2012-01-01	Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19	Coliphagecode 3028	No	Resolved

The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

City of Scappoose: frequently asked questions

Who runs City of Scappoose?

City of Scappoose (PWSID OR4100792) is a community water system owned by a local government. It is regulated by the OR state drinking water program.

How many people does City of Scappoose serve?

City of Scappoose reports serving 8,710 people through 2,793 service connections in Columbia County, Oregon.

Where does City of Scappoose get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does City of Scappoose have any drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is City of Scappoose's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the OR state drinking water program.

Where can I find City of Scappoose's water quality report?

As a community water system, City of Scappoose must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Columbia County

Water system	County	Population served	Type	Source
St Helens, City of	Columbia	13,410	Community	Groundwater under influence of surface water
Mcnulty Water PUD	Columbia	2,500	Community	Groundwater
Clatskanie, City of	Columbia	2,188	Community	Surface water
Vernonia, City of	Columbia	2,100	Community	Surface water
Warren Water Association	Columbia	2,050	Community	Groundwater
Columbia City Mun Waterworks	Columbia	1,995	Community	Groundwater

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Scappoose, City of, PWSID OR4100792, Oregon”, https://aquacensus.com/water-systems/oregon/scappoose-city-of-or4100792 (data as of October 1, 2026).