Public water system · WA5315683

Active

Cowlitz Trout Hatchery

At a glance

Cowlitz Trout Hatchery (PWSID WA5315683) is an active transient non-community water system in Lewis County, Washington. It reports serving 29 people through 7 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in September 2012.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDWA5315683

System typeTransient non-community water system

Activity statusActive

Population served29

Service connections7

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyWA state drinking water program

City served—

StateWashington

ZIP—

CountyLewis County

How does Cowlitz Trout Hatchery compare with other water systems in Lewis County?

By EPA's size categories, Cowlitz Trout Hatchery 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 less than 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 Cowlitz Trout Hatchery is well 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 Cowlitz Trout Hatchery?

EPA lists Cowlitz Trout Hatchery as owned by a local government. 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. 37 of the 166 active systems in Lewis County (22%) are also owned by a local government.

Does Cowlitz Trout Hatchery have drinking water violations?

EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in September 2012. The violations listed here began between October 1992 and September 2012. By type: 5 contaminant level above the legal limit and 4 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 of them). EPA lists 8 as archived and 1 as resolved. 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. 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
2012-09-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
1999-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
1998-12-01	Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25	Total coliform bacteria (TCR)code 3100	No	Archived
1998-06-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
1998-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
1997-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
1996-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
1996-03-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived
1992-10-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Archived

All 9 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.

Cowlitz Trout Hatchery: frequently asked questions

Who runs Cowlitz Trout Hatchery?

Cowlitz Trout Hatchery (PWSID WA5315683) is a transient non-community water system owned by a local government. It is regulated by the WA state drinking water program.

How many people does Cowlitz Trout Hatchery serve?

Cowlitz Trout Hatchery reports serving 29 people through 7 service connections in Lewis County, Washington.

Where does Cowlitz Trout Hatchery 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 Cowlitz Trout Hatchery have any drinking water violations?

EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in September 2012. 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 Cowlitz Trout Hatchery'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 9 violations for this system; 5 are health-based, and the most recent began in September 2012. For current results, consult EPA ECHO, or the WA state drinking water program.

Where can I find Cowlitz Trout Hatchery's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Cowlitz Trout Hatchery 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, “Cowlitz Trout Hatchery, PWSID WA5315683, Washington”, https://aquacensus.com/water-systems/washington/cowlitz-trout-hatchery-wa5315683 (data as of October 1, 2026).