Public water system · WA5305914
ActiveMoses Coulee Water Association
At a glance
Moses Coulee Water Association (PWSID WA5305914) is an active community water system in Douglas County, Washington. It reports serving 42 people through 17 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
42
Service connections
17
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Moses Coulee Water Association compare with other water systems in Douglas County?
By EPA's size categories, Moses Coulee Water Association is a very small system (500 people or fewer). Douglas County has 46 active public water systems. Its population served is well below the county average of 886 people per system, and accounts for 0.1% of the 40,758 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active community water system reports serving 6,703 people, so Moses Coulee Water Association is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Washington has 2,392 active community water systems, 51% of the state's 4,705 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,370 Washington systems (93%) list groundwater as their primary source.
Who owns and regulates Moses Coulee Water Association?
EPA lists Moses Coulee Water Association as privately owned. The WA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 31 of the 46 active systems in Douglas County (67%) are also privately owned.
Does Moses Coulee Water Association have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2019. The violations listed here began between October 2016 and January 2019. By type: 11 monitoring and reporting and 1 monitoring. The contaminants or rules involved are Lead and Copper Rule, Revised Total Coliform Rule, 1,2-Dichloropropane and Chlorobenzene. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2019-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2018-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Moses Coulee Water Association: frequently asked questions
Who runs Moses Coulee Water Association?
Moses Coulee Water Association (PWSID WA5305914) is a community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Moses Coulee Water Association serve?
Moses Coulee Water Association reports serving 42 people through 17 service connections in Douglas County, Washington.
Where does Moses Coulee Water Association get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Moses Coulee Water Association have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2019. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Moses Coulee Water Association's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Moses Coulee Water Association's water quality report?
As a community water system, Moses Coulee Water Association must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Douglas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| East Wenatchee Water District | Douglas | 26,519 | Community | Purchased groundwater |
| Rock Island Water Dept City of | Douglas | 3,226 | Community | Groundwater |
| Bridgeport City of | Douglas | 2,214 | Community | Groundwater |
| Waterville Town of | Douglas | 1,140 | Community | Groundwater |
| Daroga State Park North | Douglas | 849 | Transient non-community | Groundwater |
| Sun Cove Public Water System | Douglas | 716 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Moses Coulee Water Association, PWSID WA5305914, Washington”, https://aquacensus.com/water-systems/washington/moses-coulee-water-association-wa5305914 (data as of October 1, 2026).