Public water system · WA53AC376
ActiveThompson Properties
At a glance
Thompson Properties (PWSID WA53AC376) is an active transient non-community water system in Lewis County, Washington. It reports serving 106 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2011.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
106
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Thompson Properties compare with other water systems in Lewis County?
By EPA's size categories, Thompson Properties 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 0.1% 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 Thompson Properties is about 26% below 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 Thompson Properties?
EPA lists Thompson Properties 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 Thompson Properties have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2011. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 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 |
|---|---|---|---|---|
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
The one violation in EPA's records.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.
Thompson Properties: frequently asked questions
Who runs Thompson Properties?
Thompson Properties (PWSID WA53AC376) is a transient non-community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Thompson Properties serve?
Thompson Properties reports serving 106 people through 1 service connection in Lewis County, Washington.
Where does Thompson Properties 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 Thompson Properties have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2011. 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 Thompson Properties' 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 one violation for this system; it is not health-based, and the most recent began in January 2011. For current results, consult EPA ECHO, or the WA state drinking water program.
Where can I find Thompson Properties' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Thompson Properties 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, “Thompson Properties, PWSID WA53AC376, Washington”, https://aquacensus.com/water-systems/washington/thompson-properties-wa53ac376 (data as of October 1, 2026).