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States → Oregon

Community Water System · PWS OR4100248

Dallas, City Of

Dallas, Oregon 97338 - drinking water served from surface water sources to 17,911 people, tracked in EPA SDWIS and UCMR5.

17,911
People served
58
EPA violations
9
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 58 drinking-water violations at Dallas, City Of, 16% of them health-based - below the Oregon per-system average.

58
Total EPA violations on record
16%
Health-based (MCL / treatment failure)
17,911
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Dallas, City Of

Dallas, City Of is a local-owned community water system that delivers drinking water to 17,911 residents in Dallas, Oregon (Polk County) through 6,400 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 58 total violations for this system , of which 9 (16%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 43 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 Surface Water Treatment Rule, recorded in 14 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Dallas, City Of's 58 violations sit below 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
17,911
Total Violations
58
Health-Based Violations
9
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
6,400
County
Polk
School/Daycare
No
MCL Violations
2
Monitoring Violations
43
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 14 2022
Interim Enhanced Surface Water Treatment Rule MR 8 2022
Interim Enhanced Surface Water Treatment Rule TT 6 2021
Lead and Copper Rule MR 4 2022
Consumer Confidence Rule Other 3 2025
Total Haloacetic Acids (HAA5) MR 2 2010
TTHM MR 2 2010
Coliform (TCR) MCL 2 2002
COLIPHAGE MR 1 2015
Revised Total Coliform Rule MON 1 2018
Mercury MR 1 1979
Cadmium MR 1 1979
Fluoride MR 1 1979
Arsenic MR 1 1979
Gross Alpha, Excl. Radon and U MR 1 1976
Surface Water Treatment Rule TT 1 1994
Nitrate MR 1 1979
Barium MR 1 1979
Long Term 2 Enhanced Surface Water Treatment Rule MR 1 2008
Chromium MR 1 1979
Combined Radium (-226 and -228) MR 1 1976
Selenium MR 1 1979

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFNA 9/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 9/7/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/7/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/7/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 9/7/2023 <6.00 ppt 6.00 ppt Not Detected
PFBS 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/7/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 9/7/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 9/7/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/7/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 9/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 9/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFMPA 9/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/7/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 9/7/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/7/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/7/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 9/7/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 6/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/8/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/8/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 6/8/2023 <2.00 ppt 2.00 ppt Not Detected
PFDA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/8/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 6/8/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 6/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
ADONA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/8/2023 <4.00 ppt 4.00 ppt Not Detected
PFMBA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/8/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/8/2023 <3.00 ppt 3.00 ppt Not Detected

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 Dallas, 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 OR4100248 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 3 SDWIS / OR4100248 / 7000
2022 Surface Water Treatment Rule MR 14 SDWIS / OR4100248 / 0200
2022 Interim Enhanced Surface Water Treatment Rule MR 8 SDWIS / OR4100248 / 0300
2022 Lead and Copper Rule MR 4 SDWIS / OR4100248 / 5000
2021 Interim Enhanced Surface Water Treatment Rule TT 6 SDWIS / OR4100248 / 0300
2018 Revised Total Coliform Rule MON 1 SDWIS / OR4100248 / 8000
2015 COLIPHAGE MR 1 SDWIS / OR4100248 / 3028
2010 Total Haloacetic Acids (HAA5) MR 2 SDWIS / OR4100248 / 2456
2010 TTHM MR 2 SDWIS / OR4100248 / 2950
2008 Long Term 2 Enhanced Surface Water Treatment Rule MR 1 SDWIS / OR4100248 / 0800
2002 Coliform (TCR) MCL 2 SDWIS / OR4100248 / 3100
1994 Surface Water Treatment Rule TT 1 SDWIS / OR4100248 / 0200
1979 Mercury MR 1 SDWIS / OR4100248 / 1035
1979 Cadmium MR 1 SDWIS / OR4100248 / 1015
1979 Fluoride MR 1 SDWIS / OR4100248 / 1025

How Dallas, City Of Compares

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

Metric Dallas, City Of Oregon avg Federal benchmark
Total violations 58 82.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 9 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 17,911 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 Dallas, City Of water safe to drink? ▼
Dallas, City Of (PWS ID: OR4100248) has 58 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 17,911 people using Surface Water sources.
How many people does Dallas, City Of serve? ▼
Dallas, City Of serves 17,911 people in Dallas, Oregon. It is a Local-owned system using Surface Water water sources with 6,400 service connections.
What type of violations does Dallas, City Of have? ▼
Dallas, City Of has 58 total violations: 9 health-based violations (MCL exceedances or treatment failures), 43 monitoring/reporting violations, and 7 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Dallas, City Of water? ▼
No. Dallas, City Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Dallas, City Of use? ▼
Dallas, City Of uses Surface Water 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.