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ROWENA DELL WATER SYSTEM

PWS ID: OR4105372 · THE DALLES, Oregon 97058

ROWENA DELL WATER SYSTEM serves 30 people in THE DALLES, Oregon using Groundwater water sources. It has 288 recorded EPA violations, including 38 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: ROWENA DELL WATER SYSTEM

ROWENA DELL WATER SYSTEM is a private-owned community water system that delivers drinking water to 30 residents in THE DALLES, Oregon (Wasco County) through 19 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 288 total violations for this system , of which 38 (13%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 237 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 38 violations (MCL, health-based). 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. ROWENA DELL WATER SYSTEM's 288 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
30
Total Violations
288
Health-Based Violations
38
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
19
County
Wasco
School/Daycare
No
MCL Violations
38
Monitoring Violations
237
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 38 2013
Coliform (TCR) MR 28 2013
Public Notice Other 10 2013
E. COLI MR 5 2013
Endrin MR 4 2009
Toxaphene MR 4 2009
Diquat MR 4 2009
Glyphosate MR 4 2009
Di(2-ethylhexyl) adipate MR 4 2009
Dinoseb MR 4 2009
Heptachlor MR 4 2009
Heptachlor epoxide MR 4 2009
2,4,5-TP MR 4 2009
Benzo(a)pyrene MR 4 2009
Pentachlorophenol MR 4 2009
Total Polychlorinated Biphenyls (PCB) MR 4 2009
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2009
ETHYLENE DIBROMIDE MR 4 2009
Chlordane MR 4 2009
Xylenes, Total MR 4 2009
DICHLOROMETHANE MR 4 2009
p-Dichlorobenzene MR 4 2009
Vinyl chloride MR 4 2009
1,1-Dichloroethylene MR 4 2009
trans-1,2-Dichloroethylene MR 4 2009
1,2-Dichloroethane MR 4 2009
1,1,1-Trichloroethane MR 4 2009
1,2-Dichloropropane MR 4 2009
Trichloroethylene MR 4 2009
Tetrachloroethylene MR 4 2009

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 ROWENA DELL WATER SYSTEM.

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 OR4105372 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 / OR4105372 / 7000
2017 TTHM MR 2 SDWIS / OR4105372 / 2950
2017 Total Haloacetic Acids (HAA5) MR 1 SDWIS / OR4105372 / 2456
2013 Coliform (TCR) MCL 38 SDWIS / OR4105372 / 3100
2013 Coliform (TCR) MR 28 SDWIS / OR4105372 / 3100
2013 Public Notice Other 10 SDWIS / OR4105372 / 7500
2013 E. COLI MR 5 SDWIS / OR4105372 / 3014
2013 COLIPHAGE MR 1 SDWIS / OR4105372 / 3028
2009 Endrin MR 4 SDWIS / OR4105372 / 2005
2009 Toxaphene MR 4 SDWIS / OR4105372 / 2020
2009 Diquat MR 4 SDWIS / OR4105372 / 2032
2009 Glyphosate MR 4 SDWIS / OR4105372 / 2034
2009 Di(2-ethylhexyl) adipate MR 4 SDWIS / OR4105372 / 2035
2009 Dinoseb MR 4 SDWIS / OR4105372 / 2041
2009 Heptachlor MR 4 SDWIS / OR4105372 / 2065

How ROWENA DELL WATER SYSTEM Compares

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

Metric ROWENA DELL WATER SYSTEM Oregon avg Federal benchmark
Total violations 288 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 38 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 30 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 ROWENA DELL WATER SYSTEM water safe to drink? ▼
ROWENA DELL WATER SYSTEM (PWS ID: OR4105372) has 288 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 30 people using Groundwater sources.
How many people does ROWENA DELL WATER SYSTEM serve? ▼
ROWENA DELL WATER SYSTEM serves 30 people in THE DALLES, Oregon. It is a Private-owned system using Groundwater water sources with 19 service connections.
What type of violations does ROWENA DELL WATER SYSTEM have? ▼
ROWENA DELL WATER SYSTEM has 288 total violations: 38 health-based violations (MCL exceedances or treatment failures), 237 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in ROWENA DELL WATER SYSTEM water? ▼
No PFAS testing data is available for ROWENA DELL WATER SYSTEM under the EPA's UCMR5 monitoring program.
What water source does ROWENA DELL WATER SYSTEM use? ▼
ROWENA DELL WATER SYSTEM 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.

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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.

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