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Community Water System · PWS WA5364850

Othello Water Department

Othello, Washington 99344 - drinking water served from groundwater sources to 8,755 people, tracked in EPA SDWIS and UCMR5.

8,755
People served
159
EPA violations
9
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 159 drinking-water violations at Othello Water Department, 6% of them health-based - above the Washington per-system average.

159
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
8,755
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Othello Water Department

Othello Water Department is a local-owned community water system that delivers drinking water to 8,755 residents in Othello, Washington (Adams County) through 3,794 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 159 total violations for this system , of which 9 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 142 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Nitrate, recorded in 67 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 Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%).

Othello Water Department's 159 violations sit above the Washington 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
8,755
Total Violations
159
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
3,794
County
Adams
School/Daycare
No
MCL Violations
9
Monitoring Violations
142
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 67 2014
Fluoride MR 15 2023
Lead and Copper Rule MR 10 2007
Diquat MR 7 2006
Coliform (TCR) MCL 5 2004
Fluoride MCL 4 1984
Consumer Confidence Rule Other 3 2014
cis-1,2-Dichloroethylene MR 2 2016
DICHLOROMETHANE MR 2 2016
p-Dichlorobenzene MR 2 2016
Vinyl chloride MR 2 2016
1,1-Dichloroethylene MR 2 2016
trans-1,2-Dichloroethylene MR 2 2016
1,2-Dichloroethane MR 2 2016
1,1,1-Trichloroethane MR 2 2016
Carbon tetrachloride MR 2 2016
1,2-Dichloropropane MR 2 2016
Trichloroethylene MR 2 2016
1,1,2-Trichloroethane MR 2 2016
CHLOROBENZENE MR 2 2016
Toluene MR 2 2016
Styrene MR 2 2016
1,2,4-Trichlorobenzene MR 2 2016
Benzene MR 2 2016
o-Dichlorobenzene MR 2 2016
Tetrachloroethylene MR 2 2016
Ethylbenzene MR 2 2016
Coliform (TCR) MR 1 2004
Gross Alpha, Excl. Radon and U MR 1 1979
Cadmium MR 1 2009

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 406 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 8/27/2024 <6.00 ppt 6.00 ppt Not Detected
ADONA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/27/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/27/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/27/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/27/2024 <4.00 ppt 4.00 ppt Not Detected
PFNA 8/27/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 8/27/2024 <5.00 ppt 5.00 ppt Not Detected
PFBS 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/27/2024 <2.00 ppt 2.00 ppt Not Detected
NEtFOSAA 8/27/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 8/27/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 8/27/2024 <8.00 ppt 8.00 ppt Not Detected
PFPeA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/27/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 8/27/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/27/2024 <5.00 ppt 5.00 ppt Not Detected
PFMBA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/27/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 8/27/2024 <4.00 ppt 4.00 ppt Not Detected
PFDoA 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpS 8/27/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/27/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 7/22/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 7/22/2024 <7.00 ppt 7.00 ppt Not Detected
NMeFOSAA 7/22/2024 <6.00 ppt 6.00 ppt Not Detected
PFDoA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 7/22/2024 <20.00 ppt 20.00 ppt Not Detected
PFNA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFMPA 7/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFUnA 7/22/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 7/22/2024 <2.00 ppt 2.00 ppt Not Detected
PFBS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFHpS 7/22/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFPeA 7/22/2024 <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 Othello Water Department.

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 WA5364850 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health, Office of Drinking Water is the primacy agency that licenses and inspects Othello Water Department under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health, Office of Drinking Water

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
2023 Fluoride MR 15 SDWIS / WA5364850 / 1025
2016 cis-1,2-Dichloroethylene MR 2 SDWIS / WA5364850 / 2380
2016 DICHLOROMETHANE MR 2 SDWIS / WA5364850 / 2964
2016 p-Dichlorobenzene MR 2 SDWIS / WA5364850 / 2969
2016 Vinyl chloride MR 2 SDWIS / WA5364850 / 2976
2016 1,1-Dichloroethylene MR 2 SDWIS / WA5364850 / 2977
2016 trans-1,2-Dichloroethylene MR 2 SDWIS / WA5364850 / 2979
2016 1,2-Dichloroethane MR 2 SDWIS / WA5364850 / 2980
2016 1,1,1-Trichloroethane MR 2 SDWIS / WA5364850 / 2981
2016 Carbon tetrachloride MR 2 SDWIS / WA5364850 / 2982
2016 1,2-Dichloropropane MR 2 SDWIS / WA5364850 / 2983
2016 Trichloroethylene MR 2 SDWIS / WA5364850 / 2984
2016 1,1,2-Trichloroethane MR 2 SDWIS / WA5364850 / 2985
2016 CHLOROBENZENE MR 2 SDWIS / WA5364850 / 2989
2016 Toluene MR 2 SDWIS / WA5364850 / 2991

How Othello Water Department Compares

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

Metric Othello Water Department Washington avg Federal benchmark
Total violations 159 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 9 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 8,755 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

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 Othello Water Department water safe to drink?
Othello Water Department (PWS ID: WA5364850) has 159 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 8,755 people using Groundwater sources.
How many people does Othello Water Department serve?
Othello Water Department serves 8,755 people in Othello, Washington. It is a Local-owned system using Groundwater water sources with 3,794 service connections.
What type of violations does Othello Water Department have?
Othello Water Department has 159 total violations: 9 health-based violations (MCL exceedances or treatment failures), 142 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Othello Water Department water?
No. Othello Water Department was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Othello Water Department use?
Othello Water Department 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.
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.
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.