Public water system · MT0005025
ActiveKoocanusa Brewery
At a glance
Koocanusa Brewery (PWSID MT0005025) is an active transient non-community water system in Lincoln County, Montana. It reports serving 31 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 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
31
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Koocanusa Brewery compare with other water systems in Lincoln County?
By EPA's size categories, Koocanusa Brewery is a very small system (500 people or fewer). Lincoln County has 92 active public water systems. Its population served is well below the county average of 212 people per system, and accounts for 0.2% of the 19,484 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Koocanusa Brewery 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. Montana has 1,206 active transient non-community water systems, 51% of the state's 2,378 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Koocanusa Brewery?
EPA lists Koocanusa Brewery as privately owned. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 64 of the 92 active systems in Lincoln County (70%) are also privately owned.
Does Koocanusa Brewery 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 2024. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate-Nitrite. 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 |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | 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.
Koocanusa Brewery: frequently asked questions
Who runs Koocanusa Brewery?
Koocanusa Brewery (PWSID MT0005025) is a transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Koocanusa Brewery serve?
Koocanusa Brewery reports serving 31 people through 1 service connection in Lincoln County, Montana.
Where does Koocanusa Brewery 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 Koocanusa Brewery 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 2024. 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 Koocanusa Brewery'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 one violation for this system; it is not health-based, and the most recent began in January 2024. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Koocanusa Brewery's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Koocanusa Brewery 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 Lincoln County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Libby City of | Lincoln | 4,892 | Community | Surface water |
| Troy City of | Lincoln | 2,100 | Community | Groundwater |
| Eureka Town of | Lincoln | 1,995 | Community | Surface water |
| Bears Country Store | Lincoln | 805 | Transient non-community | Groundwater |
| Fortine Mercantile | Lincoln | 504 | Transient non-community | Groundwater |
| Indian Springs Ranch Sub | Lincoln | 455 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Koocanusa Brewery, PWSID MT0005025, Montana”, https://aquacensus.com/water-systems/montana/koocanusa-brewery-mt0005025 (data as of October 1, 2026).