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UMATILLA, CITY OF

PWS ID: OR4100914 · UMATILLA, Oregon 97882

UMATILLA, CITY OF serves 8,256 people in UMATILLA, Oregon using Groundwater water sources. It has 114 recorded EPA violations, including 2 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: UMATILLA, CITY OF

UMATILLA, CITY OF is a local-owned community water system that delivers drinking water to 8,256 residents in UMATILLA, Oregon (Umatilla County) through 2,120 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 114 total violations for this system , of which 2 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 105 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 Nitrate, recorded in 6 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 33.2 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. UMATILLA, CITY OF's 114 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
8,256
Total Violations
114
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
2,120
County
Umatilla
School/Daycare
No
MCL Violations
2
Monitoring Violations
105
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 6 2002
Coliform (TCR) MR 5 2000
Consumer Confidence Rule Other 4 2025
Toxaphene MR 3 2005
Dalapon MR 3 2005
Diquat MR 3 2005
Endothall MR 3 2005
Glyphosate MR 3 2005
Di(2-ethylhexyl) phthalate MR 3 2005
Dinoseb MR 3 2005
Carbofuran MR 3 2005
LASSO MR 3 2005
Heptachlor MR 3 2005
2,4-D MR 3 2005
2,4,5-TP MR 3 2005
HEXACHLOROBENZENE MR 3 2005
Benzo(a)pyrene MR 3 2005
Pentachlorophenol MR 3 2005
Total Polychlorinated Biphenyls (PCB) MR 3 2005
1,2-DIBROMO-3-CHLOROPROPANE MR 3 2005
ETHYLENE DIBROMIDE MR 3 2005
Chlordane MR 3 2005
Endrin MR 3 2005
Methoxychlor MR 3 2005
Di(2-ethylhexyl) adipate MR 3 2005
OXAMYL MR 3 2005
Simazine MR 3 2005
Picloram MR 3 2005
Hexachlorocyclopentadiene MR 3 2005
Atrazine MR 3 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 180 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 7/17/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/17/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/17/2023 27.0000 µg/L 9 µg/L Detected
PFEESA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/17/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/17/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/17/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFMBA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/17/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFPeA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 7/17/2023 <0.007 µg/L 0.007 µg/L Not Detected
lithium 7/17/2023 18.8000 µg/L 9 µg/L Detected
PFHpS 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 7/17/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 7/17/2023 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 7/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/17/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 7/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/17/2023 <0.005 µg/L 0.005 µg/L 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 UMATILLA, 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 OR4100914 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 4 SDWIS / OR4100914 / 7000
2025 Revised Total Coliform Rule MON 3 SDWIS / OR4100914 / 8000
2025 E. COLI MR 1 SDWIS / OR4100914 / 3014
2020 COLIPHAGE MR 1 SDWIS / OR4100914 / 3028
2005 Toxaphene MR 3 SDWIS / OR4100914 / 2020
2005 Dalapon MR 3 SDWIS / OR4100914 / 2031
2005 Diquat MR 3 SDWIS / OR4100914 / 2032
2005 Endothall MR 3 SDWIS / OR4100914 / 2033
2005 Glyphosate MR 3 SDWIS / OR4100914 / 2034
2005 Di(2-ethylhexyl) phthalate MR 3 SDWIS / OR4100914 / 2039
2005 Dinoseb MR 3 SDWIS / OR4100914 / 2041
2005 Carbofuran MR 3 SDWIS / OR4100914 / 2046
2005 LASSO MR 3 SDWIS / OR4100914 / 2051
2005 Heptachlor MR 3 SDWIS / OR4100914 / 2065
2005 2,4-D MR 3 SDWIS / OR4100914 / 2105

How UMATILLA, CITY OF Compares

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

Metric UMATILLA, CITY OF Oregon avg Federal benchmark
Total violations 114 82.1 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 2 8.1 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 24% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 8,256 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 UMATILLA, CITY OF water safe to drink? ▼
UMATILLA, CITY OF (PWS ID: OR4100914) has 114 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 8,256 people using Groundwater sources.
How many people does UMATILLA, CITY OF serve? ▼
UMATILLA, CITY OF serves 8,256 people in UMATILLA, Oregon. It is a Local-owned system using Groundwater water sources with 2,120 service connections.
What type of violations does UMATILLA, CITY OF have? ▼
UMATILLA, CITY OF has 114 total violations: 2 health-based violations (MCL exceedances or treatment failures), 105 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in UMATILLA, CITY OF water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in UMATILLA, CITY OF's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does UMATILLA, CITY OF use? ▼
UMATILLA, 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.

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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.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial