PlainWater
States → Oregon

DUFUR, CITY OF

PWS ID: OR4100261 · DUFUR, Oregon 97021

DUFUR, CITY OF serves 610 people in DUFUR, Oregon using Groundwater water sources. It has 144 recorded EPA violations, including 3 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: DUFUR, CITY OF

DUFUR, CITY OF is a local-owned community water system that delivers drinking water to 610 residents in DUFUR, Oregon (Wasco County) through 351 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 144 total violations for this system , of which 3 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 133 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 10 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. DUFUR, CITY OF's 144 violations sit above the Oregon average. Statewide, 30 of 125 UCMR5-tested systems have reported PFAS detections (24%). 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
610
Total Violations
144
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
351
County
Wasco
School/Daycare
No
MCL Violations
3
Monitoring Violations
133
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 10 2016
Revised Total Coliform Rule MON 5 2023
Consumer Confidence Rule Other 5 2025
Nitrate MR 3 2019
Revised Total Coliform Rule MCL 3 2021
1,2,4-Trichlorobenzene MR 2 2008
o-Dichlorobenzene MR 2 2008
p-Dichlorobenzene MR 2 2008
Vinyl chloride MR 2 2008
1,1-Dichloroethylene MR 2 2008
trans-1,2-Dichloroethylene MR 2 2008
1,1,1-Trichloroethane MR 2 2008
Carbon tetrachloride MR 2 2008
1,2-Dichloropropane MR 2 2008
1,1,2-Trichloroethane MR 2 2008
CHLOROBENZENE MR 2 2008
Toluene MR 2 2008
Ethylbenzene MR 2 2008
Styrene MR 2 2008
Endrin MR 2 2008
Methoxychlor MR 2 2008
Toxaphene MR 2 2008
Dalapon MR 2 2008
Diquat MR 2 2008
Di(2-ethylhexyl) adipate MR 2 2008
Di(2-ethylhexyl) phthalate MR 2 2008
Dinoseb MR 2 2008
Hexachlorocyclopentadiene MR 2 2008
Atrazine MR 2 2008
LASSO MR 2 2008

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 DUFUR, CITY OF.

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 OR4100261 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
2025 Consumer Confidence Rule Other 5 SDWIS / OR4100261 / 7000
2023 Revised Total Coliform Rule MON 5 SDWIS / OR4100261 / 8000
2021 Revised Total Coliform Rule MCL 3 SDWIS / OR4100261 / 8000
2019 Nitrate MR 3 SDWIS / OR4100261 / 1040
2019 COLIPHAGE MR 1 SDWIS / OR4100261 / 3028
2016 Coliform (TCR) MR 10 SDWIS / OR4100261 / 3100
2014 Total Haloacetic Acids (HAA5) MR 2 SDWIS / OR4100261 / 2456
2014 TTHM MR 2 SDWIS / OR4100261 / 2950
2011 Asbestos MR 1 SDWIS / OR4100261 / 1094
2008 1,2,4-Trichlorobenzene MR 2 SDWIS / OR4100261 / 2378
2008 o-Dichlorobenzene MR 2 SDWIS / OR4100261 / 2968
2008 p-Dichlorobenzene MR 2 SDWIS / OR4100261 / 2969
2008 Vinyl chloride MR 2 SDWIS / OR4100261 / 2976
2008 1,1-Dichloroethylene MR 2 SDWIS / OR4100261 / 2977
2008 trans-1,2-Dichloroethylene MR 2 SDWIS / OR4100261 / 2979

How DUFUR, CITY OF Compares

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

Metric DUFUR, CITY OF Oregon avg Federal benchmark
Total violations 144 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 3 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 610 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is DUFUR, CITY OF water safe to drink? ▼
DUFUR, CITY OF (PWS ID: OR4100261) has 144 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 610 people using Groundwater sources.
How many people does DUFUR, CITY OF serve? ▼
DUFUR, CITY OF serves 610 people in DUFUR, Oregon. It is a Local-owned system using Groundwater water sources with 351 service connections.
What type of violations does DUFUR, CITY OF have? ▼
DUFUR, CITY OF has 144 total violations: 3 health-based violations (MCL exceedances or treatment failures), 133 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DUFUR, CITY OF water? ▼
No PFAS testing data is available for DUFUR, CITY OF under the EPA's UCMR5 monitoring program.
What water source does DUFUR, CITY OF use? ▼
DUFUR, CITY OF uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.

Explore PlainWater

Water in Oregon

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for Oregon

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial