Public water system · OR4195341
ActiveOprd Ll Stub Stewart St Pk
At a glance
Oprd Ll Stub Stewart St Pk (PWSID OR4195341) is an active transient non-community water system in Washington County, Oregon. It reports serving 1,206 people through 144 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,206
Service connections
144
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Oprd Ll Stub Stewart St Pk compare with other water systems in Washington County?
By EPA's size categories, Oprd Ll Stub Stewart St Pk is a small system (501 to 3,300 people). Washington County has 97 active public water systems. Its population served is well below the county average of 6,158 people per system, and accounts for 0.2% of the 597,296 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 Oprd Ll Stub Stewart St Pk is about 8.4 times 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 Oprd Ll Stub Stewart St Pk?
EPA lists Oprd Ll Stub Stewart St Pk as owned by a state 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. 3 of the 97 active systems in Washington County (3.1%) are also owned by a state government.
Does Oprd Ll Stub Stewart St Pk have drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in October 2023. The violations listed here began between January 2008 and October 2023. By type: 9 monitoring and reporting, 1 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Coliphage (3 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2023-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-07-21 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2021-01-01 | Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19 | Coliphagecode 3028 | No | Resolved |
| 2020-09-08 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2020-08-10 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2015-01-01 | Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19 | Coliphagecode 3028 | No | Resolved |
| 2015-01-01 | Monitoring and reportingFailure to Conduct Assessment Monitoring · code 19 | Coliphagecode 3028 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 11 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.
Oprd Ll Stub Stewart St Pk: frequently asked questions
Who runs Oprd Ll Stub Stewart St Pk?
Oprd Ll Stub Stewart St Pk (PWSID OR4195341) is a transient non-community water system owned by a state government. It is regulated by the OR state drinking water program.
How many people does Oprd Ll Stub Stewart St Pk serve?
Oprd Ll Stub Stewart St Pk reports serving 1,206 people through 144 service connections in Washington County, Oregon.
Where does Oprd Ll Stub Stewart St Pk 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 Oprd Ll Stub Stewart St Pk have any drinking water violations?
EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in October 2023. 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 Oprd Ll Stub Stewart St Pk'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. EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in October 2023. For current results, consult EPA ECHO, or the OR state drinking water program.
Where can I find Oprd Ll Stub Stewart St Pk's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Oprd Ll Stub Stewart St Pk 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 Washington County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tualatin Valley Water District | Washington | 224,600 | Community | Purchased surface water |
| Hillsboro, City of | Washington | 92,632 | Community | Purchased surface water |
| Beaverton, City of | Washington | 88,045 | Community | Purchased surface water |
| Tigard, City of | Washington | 62,500 | Community | Purchased surface water |
| Tualatin, City of | Washington | 28,106 | Community | Purchased surface water |
| Forest Grove, City of | Washington | 26,838 | Community | Surface water |
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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, “Oprd Ll Stub Stewart St Pk, PWSID OR4195341, Oregon”, https://aquacensus.com/water-systems/oregon/oprd-ll-stub-stewart-st-pk-or4195341 (data as of October 1, 2026).