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Non-Transient Non-Community Water System · PWS OR4105819

Stahlbush Island Farms

Corvallis, Oregon 97333-2709 - drinking water served from groundwater sources to 200 people, tracked in EPA SDWIS and UCMR5.

200
People served
191
EPA violations
10
Health-based
Untested
UCMR5 result

The verdict

EPA records 191 drinking-water violations at Stahlbush Island Farms, 5% of them health-based - above the Oregon per-system average.

191
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
200
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Stahlbush Island Farms

Stahlbush Island Farms is a private-owned non-transient non-community water system that delivers drinking water to 200 residents in Corvallis, Oregon (Benton County) through 5 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 191 total violations for this system , of which 10 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 179 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 54 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Oregon, EPA tracks 2,518 public water systems serving 4,005,242 people, with 206,659 cumulative violations and 20,339 health-based violations on record. About 99% of systems in the state carry at least one violation, and state-wide the average per system is 82.1 violations. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%).

Stahlbush Island Farms's 191 violations sit above the Oregon average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
200
Total Violations
191
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
5
County
Benton
School/Daycare
No
MCL Violations
10
Monitoring Violations
179
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 54 2012
Lead and Copper Rule MR 14 2021
Nitrate MR 12 2020
Nitrate MCL 7 2016
Chromium MR 4 2005
Mercury MR 4 2005
Nickel MR 4 2005
Beryllium, Total MR 4 2005
Fluoride MR 4 2005
Thallium, Total MR 4 2005
Selenium MR 4 2005
Antimony, Total MR 4 2005
Cadmium MR 4 2005
CYANIDE MR 4 2005
Barium MR 4 2005
Coliform (TCR) MCL 3 2003
COLIPHAGE MR 2 2021
Nitrite MR 2 2002
Endrin MR 1 2005
BHC-GAMMA MR 1 2005
Methoxychlor MR 1 2005
Toxaphene MR 1 2005
Diquat MR 1 2005
Glyphosate MR 1 2005
OXAMYL MR 1 2005
Simazine MR 1 2005
Picloram MR 1 2005
Dinoseb MR 1 2005
Hexachlorocyclopentadiene MR 1 2005
Carbofuran MR 1 2005

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Stahlbush Island Farms.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID OR4105819 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Oregon Drinking Water Authority

Oregon's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find OR regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2021 Lead and Copper Rule MR 14 SDWIS / OR4105819 / 5000
2021 COLIPHAGE MR 2 SDWIS / OR4105819 / 3028
2020 Nitrate MR 12 SDWIS / OR4105819 / 1040
2018 Revised Total Coliform Rule MON 1 SDWIS / OR4105819 / 8000
2016 Nitrate MCL 7 SDWIS / OR4105819 / 1040
2012 Coliform (TCR) MR 54 SDWIS / OR4105819 / 3100
2005 Chromium MR 4 SDWIS / OR4105819 / 1020
2005 Mercury MR 4 SDWIS / OR4105819 / 1035
2005 Nickel MR 4 SDWIS / OR4105819 / 1036
2005 Beryllium, Total MR 4 SDWIS / OR4105819 / 1075
2005 Fluoride MR 4 SDWIS / OR4105819 / 1025
2005 Thallium, Total MR 4 SDWIS / OR4105819 / 1085
2005 Selenium MR 4 SDWIS / OR4105819 / 1045
2005 Antimony, Total MR 4 SDWIS / OR4105819 / 1074
2005 Cadmium MR 4 SDWIS / OR4105819 / 1015

How Stahlbush Island Farms Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Stahlbush Island Farms Oregon avg Federal benchmark
Total violations 191 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 10 8.1 Indicates a contaminant exceeded a federal MCL
PFAS detection None 24% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 200 1,591 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,518 regulated public water systems in Oregon.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Stahlbush Island Farms water safe to drink? ▼
Stahlbush Island Farms (PWS ID: OR4105819) has 191 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 200 people using Groundwater sources.
How many people does Stahlbush Island Farms serve? ▼
Stahlbush Island Farms serves 200 people in Corvallis, Oregon. It is a Private-owned system using Groundwater water sources with 5 service connections.
What type of violations does Stahlbush Island Farms have? ▼
Stahlbush Island Farms has 191 total violations: 10 health-based violations (MCL exceedances or treatment failures), 179 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Stahlbush Island Farms water? ▼
No PFAS testing data is available for Stahlbush Island Farms under the EPA's UCMR5 monitoring program.
What water source does Stahlbush Island Farms use? ▼
Stahlbush Island Farms uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.