Public water system · OR4195350

Active

Calvary Corvallis

At a glance

Calvary Corvallis (PWSID OR4195350) is an active non-transient non-community water system in Benton County, Oregon. It reports serving 173 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in January 2025.

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

Population served

173

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDOR4195350

System typeNon-transient non-community water system

Activity statusActive

Population served173

Service connections1

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyOR state drinking water program

City served—

StateOregon

ZIP—

CountyBenton County

How does Calvary Corvallis compare with other water systems in Benton County?

By EPA's size categories, Calvary Corvallis is a very small system (500 people or fewer). Benton County has 51 active public water systems. Its population served is well below the county average of 1,430 people per system, and accounts for 0.2% of the 72,904 people reported by systems filed under the county. Across Oregon, the 2,536 active systems average 1,587 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Calvary Corvallis is about 60% below that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Oregon has 346 active non-transient non-community water systems, 14% of the state's 2,536 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,175 Oregon systems (86%) list groundwater as their primary source.

Who owns and regulates Calvary Corvallis?

EPA lists Calvary Corvallis as privately owned. 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. 29 of the 51 active systems in Benton County (57%) are also privately owned.

Does Calvary Corvallis have drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in January 2025. The violations listed here began between October 2012 and January 2025. By type: 5 monitoring and reporting, 4 contaminant level above the legal limit and 3 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 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
2025-01-01	Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51	Lead and Copper Rulecode 5000	No	Resolved
2021-01-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-10-01	MonitoringMonitoring, Additional Routine (RTCR) · code 3B	Revised Total Coliform Rulecode 8000	No	Resolved
2016-02-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2016-01-31	Monitoring and reportingMonitoring, Source Water (GWR) · code 34	E. colicode 3014	No	Resolved
2016-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2015-09-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2014-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2013-02-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2013-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2012-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	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.

Calvary Corvallis: frequently asked questions

Who runs Calvary Corvallis?

Calvary Corvallis (PWSID OR4195350) is a non-transient non-community water system privately owned. It is regulated by the OR state drinking water program.

How many people does Calvary Corvallis serve?

Calvary Corvallis reports serving 173 people through 1 service connection in Benton County, Oregon.

Where does Calvary Corvallis get its water?

EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.

Does Calvary Corvallis have any drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in January 2025. 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 Calvary Corvallis' 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, 4 are health-based, and the most recent began in January 2025. For current results, consult EPA ECHO, or the OR state drinking water program.

Where can I find Calvary Corvallis' water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Calvary Corvallis is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

Other water systems in Benton County

Water system	County	Population served	Type	Source
Corvallis, City of	Benton	61,468	Community	Surface water
Philomath Public Works	Benton	4,670	Community	Surface water
Adair Village Water System	Benton	875	Community	Surface water
Monroe, City of	Benton	723	Community	Surface water
Knoll Terrace Park	Benton	452	Community	Groundwater
Vineyard Mountain Water	Benton	325	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, “Calvary Corvallis, PWSID OR4195350, Oregon”, https://aquacensus.com/water-systems/oregon/calvary-corvallis-or4195350 (data as of October 1, 2026).