Public water system · OR4100784
ActivePioneer Park Co-Op Inc.
At a glance
Pioneer Park Co-Op Inc. (PWSID OR4100784) is an active community water system in Polk County, Oregon. It reports serving 54 people through 25 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
54
Service connections
25
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Pioneer Park Co-Op Inc. compare with other water systems in Polk County?
By EPA's size categories, Pioneer Park Co-Op Inc. is a very small system (500 people or fewer). Polk County has 29 active public water systems. Its population served is well below the county average of 1,851 people per system, and accounts for 0.1% of the 53,687 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 Pioneer Park Co-Op Inc. is well below 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. 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 Pioneer Park Co-Op Inc.?
EPA lists Pioneer Park Co-Op Inc. 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. 20 of the 29 active systems in Polk County (69%) are also privately owned.
Does Pioneer Park Co-Op Inc. have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 2025. The violations listed here began between December 2005 and December 2025. By type: 6 monitoring and reporting, 4 public notice, recordkeeping or other and 2 required treatment not met. The contaminant or rule involved most often is Groundwater Rule (6 of them). EPA lists 11 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2024-01-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2022-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2019-01-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2018-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2016-08-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2016-05-31 | Required treatment not metFailure To Address Contamination · code 48 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2016-01-24 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2016-01-03 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2005-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | 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.
Pioneer Park Co-Op Inc.: frequently asked questions
Who runs Pioneer Park Co-Op Inc.?
Pioneer Park Co-Op Inc. (PWSID OR4100784) is a community water system privately owned. It is regulated by the OR state drinking water program.
How many people does Pioneer Park Co-Op Inc. serve?
Pioneer Park Co-Op Inc. reports serving 54 people through 25 service connections in Polk County, Oregon.
Where does Pioneer Park Co-Op Inc. 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 Pioneer Park Co-Op Inc. have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 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 Pioneer Park Co-Op Inc.'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, 2 are health-based, and the most recent began in December 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the OR state drinking water program.
Where can I find Pioneer Park Co-Op Inc.'s water quality report?
As a community water system, Pioneer Park Co-Op Inc. 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 Polk County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dallas, City of | Polk | 17,911 | Community | Surface water |
| Monmouth, City of | Polk | 11,651 | Community | Groundwater under influence of surface water |
| Independence Water System | Polk | 10,300 | Community | Groundwater |
| Luckiamute Domestic Water Coop | Polk | 2,738 | Community | Purchased surface water |
| Perrydale Domestic Wtr Assn | Polk | 2,655 | Community | Groundwater |
| Grand Ronde Community Wtr Assn | Polk | 2,500 | 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, “Pioneer Park Co-Op Inc., PWSID OR4100784, Oregon”, https://aquacensus.com/water-systems/oregon/pioneer-park-co-op-inc-or4100784 (data as of October 1, 2026).