Public water system · WA5306226
ActiveWinlock Shell
At a glance
Winlock Shell (PWSID WA5306226) is an active transient non-community water system in Lewis County, Washington. It reports serving 159 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; none is health-based, and the most recent began in March 2000.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
159
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Winlock Shell compare with other water systems in Lewis County?
By EPA's size categories, Winlock Shell is a very small system (500 people or fewer). Lewis County has 166 active public water systems. Its population served is well below the county average of 537 people per system, and accounts for 0.2% of the 89,186 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Winlock Shell is about 10% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Washington has 1,913 active transient non-community water systems, 41% 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 Winlock Shell?
EPA lists Winlock Shell 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. 117 of the 166 active systems in Lewis County (70%) are also privately owned.
Does Winlock Shell have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in March 2000. The violations listed here began between January 2000 and March 2000. By type: 2 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2000-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2000-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 2 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.
Winlock Shell: frequently asked questions
Who runs Winlock Shell?
Winlock Shell (PWSID WA5306226) is a transient non-community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Winlock Shell serve?
Winlock Shell reports serving 159 people through 1 service connection in Lewis County, Washington.
Where does Winlock Shell 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 Winlock Shell have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in March 2000. 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 Winlock Shell'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. EPA's records list 2 violations for this system; none is health-based, and the most recent began in March 2000. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Winlock Shell's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Winlock Shell is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Lewis County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Centralia Public Works - Water | Lewis | 28,164 | Community | Groundwater |
| Chehalis Water Department | Lewis | 11,718 | Community | Surface water |
| Winlock City of | Lewis | 3,502 | Community | Groundwater |
| Napavine City of | Lewis | 3,095 | Community | Groundwater |
| Boistfort Valley | Lewis | 2,389 | Community | Surface water |
| Morton City of | Lewis | 2,147 | Community | Surface water |
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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, “Winlock Shell, PWSID WA5306226, Washington”, https://aquacensus.com/water-systems/washington/winlock-shell-wa5306226 (data as of October 1, 2026).