Public water system · OR4195403
ActiveKnudsen Vineyards
At a glance
Knudsen Vineyards (PWSID OR4195403) is an active transient non-community water system in Yamhill County, Oregon. It reports serving 30 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
30
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Knudsen Vineyards compare with other water systems in Yamhill County?
By EPA's size categories, Knudsen Vineyards is a very small system (500 people or fewer). Yamhill County has 91 active public water systems. Its population served is well below the county average of 998 people per system, and accounts for less than 0.1% of the 90,787 people reported by systems filed under the county. Across Oregon, the 2,536 active systems average 1,587 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Knudsen Vineyards is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Oregon has 1,250 active transient non-community water systems, 49% 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 Knudsen Vineyards?
EPA lists Knudsen Vineyards 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. 71 of the 91 active systems in Yamhill County (78%) are also privately owned.
Does Knudsen Vineyards have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2015. The violations listed here began between October 2011 and January 2015. By type: 4 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Coliphage (2 of them). EPA lists 4 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2015-01-01 | Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19 | Coliphagecode 3028 | No | Archived |
| 2012-01-01 | Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19 | Coliphagecode 3028 | No | Resolved |
| 2011-12-23 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
All 5 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.
Knudsen Vineyards: frequently asked questions
Who runs Knudsen Vineyards?
Knudsen Vineyards (PWSID OR4195403) is a transient non-community water system privately owned. It is regulated by the OR state drinking water program.
How many people does Knudsen Vineyards serve?
Knudsen Vineyards reports serving 30 people through 2 service connections in Yamhill County, Oregon.
Where does Knudsen Vineyards 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 Knudsen Vineyards have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2015. 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 Knudsen Vineyards' 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. EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2015. For current results, consult EPA ECHO, or the OR state drinking water program.
Where can I find Knudsen Vineyards' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Knudsen Vineyards is a 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 Yamhill County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mcminnville Water & Light | Yamhill | 34,515 | Community | Surface water |
| Newberg, City of | Yamhill | 25,138 | Community | Groundwater |
| Sheridan, City of | Yamhill | 6,494 | Community | Surface water |
| Lafayette, City of | Yamhill | 4,423 | Community | Purchased surface water |
| Dundee, City of | Yamhill | 2,960 | Community | Groundwater |
| Dayton, City of | Yamhill | 2,535 | 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, “Knudsen Vineyards, PWSID OR4195403, Oregon”, https://aquacensus.com/water-systems/oregon/knudsen-vineyards-or4195403 (data as of October 1, 2026).