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Community Water System · PWS WA5305914

Moses Coulee Water Association

Wenatchee, Washington 98801 - drinking water served from groundwater sources to 42 people, tracked in EPA SDWIS and UCMR5.

42
People served
160
EPA violations
6
Health-based
Untested
UCMR5 result

The verdict

EPA records 160 drinking-water violations at Moses Coulee Water Association, 4% of them health-based - above the Washington per-system average.

160
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
42
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Moses Coulee Water Association

Moses Coulee Water Association is a private-owned community water system that delivers drinking water to 42 residents in Wenatchee, Washington (Douglas County) through 17 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 160 total violations for this system , of which 6 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 146 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 36 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 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%).

Moses Coulee Water Association's 160 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
42
Total Violations
160
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
17
County
Douglas
School/Daycare
No
MCL Violations
6
Monitoring Violations
146
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 36 2010
Coliform (TCR) MCL 6 1999
Consumer Confidence Rule Other 5 2016
cis-1,2-Dichloroethylene MR 4 2016
DICHLOROMETHANE MR 4 2016
o-Dichlorobenzene MR 4 2016
p-Dichlorobenzene MR 4 2016
Vinyl chloride MR 4 2016
1,1-Dichloroethylene MR 4 2016
1,2-Dichloroethane MR 4 2016
1,1,1-Trichloroethane MR 4 2016
Trichloroethylene MR 4 2016
1,1,2-Trichloroethane MR 4 2016
Tetrachloroethylene MR 4 2016
Benzene MR 4 2016
Toluene MR 4 2016
Ethylbenzene MR 4 2016
1,2,4-Trichlorobenzene MR 4 2016
CHLOROBENZENE MR 4 2016
Styrene MR 4 2016
trans-1,2-Dichloroethylene MR 4 2016
1,2-Dichloropropane MR 4 2016
Carbon tetrachloride MR 4 2016
Pentachlorophenol MR 2 2002
Lead and Copper Rule MR 2 2019
Picloram MR 1 2002
Dinoseb MR 1 2002
2,4,5-TP MR 1 2002
Aldicarb sulfoxide MR 1 2002
Aldicarb sulfone MR 1 2002

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 Moses Coulee Water Association.

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 WA5305914 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 Moses Coulee Water Association 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
2019 Lead and Copper Rule MR 2 SDWIS / WA5305914 / 5000
2018 Revised Total Coliform Rule MON 1 SDWIS / WA5305914 / 8000
2016 Consumer Confidence Rule Other 5 SDWIS / WA5305914 / 7000
2016 cis-1,2-Dichloroethylene MR 4 SDWIS / WA5305914 / 2380
2016 DICHLOROMETHANE MR 4 SDWIS / WA5305914 / 2964
2016 o-Dichlorobenzene MR 4 SDWIS / WA5305914 / 2968
2016 p-Dichlorobenzene MR 4 SDWIS / WA5305914 / 2969
2016 Vinyl chloride MR 4 SDWIS / WA5305914 / 2976
2016 1,1-Dichloroethylene MR 4 SDWIS / WA5305914 / 2977
2016 1,2-Dichloroethane MR 4 SDWIS / WA5305914 / 2980
2016 1,1,1-Trichloroethane MR 4 SDWIS / WA5305914 / 2981
2016 Trichloroethylene MR 4 SDWIS / WA5305914 / 2984
2016 1,1,2-Trichloroethane MR 4 SDWIS / WA5305914 / 2985
2016 Tetrachloroethylene MR 4 SDWIS / WA5305914 / 2987
2016 Benzene MR 4 SDWIS / WA5305914 / 2990

How Moses Coulee Water Association Compares

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

Metric Moses Coulee Water Association Washington avg Federal benchmark
Total violations 160 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 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 42 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 Moses Coulee Water Association water safe to drink? ▼
Moses Coulee Water Association (PWS ID: WA5305914) has 160 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 42 people using Groundwater sources.
How many people does Moses Coulee Water Association serve? ▼
Moses Coulee Water Association serves 42 people in Wenatchee, Washington. It is a Private-owned system using Groundwater water sources with 17 service connections.
What type of violations does Moses Coulee Water Association have? ▼
Moses Coulee Water Association has 160 total violations: 6 health-based violations (MCL exceedances or treatment failures), 146 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Moses Coulee Water Association water? ▼
No PFAS testing data is available for Moses Coulee Water Association under the EPA's UCMR5 monitoring program.
What water source does Moses Coulee Water Association use? ▼
Moses Coulee Water Association 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. 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.