Public water system · MT0062342
ActiveEureka Ranger Station
At a glance
Eureka Ranger Station (PWSID MT0062342) is an active non-transient non-community water system in Lincoln County, Montana. It reports serving 127 people through 9 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in March 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
127
Service connections
9
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Eureka Ranger Station compare with other water systems in Lincoln County?
By EPA's size categories, Eureka Ranger Station is a very small system (500 people or fewer). Lincoln County has 92 active public water systems. Its population served is about 40% below the county average of 212 people per system, and accounts for 0.7% 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 non-transient non-community water system reports serving 430 people, so Eureka Ranger Station is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Montana has 319 active non-transient non-community water systems, 13% 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 Eureka Ranger Station?
EPA lists Eureka Ranger Station as owned by the federal government. 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. 13 of the 92 active systems in Lincoln County (14%) are also owned by the federal government.
Does Eureka Ranger Station have drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in March 2025. The violations listed here began between November 1999 and March 2025. By type: 2 monitoring and reporting, 2 contaminant level above the legal limit, 1 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2025-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-11-18 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2017-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2007-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 1999-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 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.
Eureka Ranger Station: frequently asked questions
Who runs Eureka Ranger Station?
Eureka Ranger Station (PWSID MT0062342) is a non-transient non-community water system owned by the federal government. It is regulated by the MT state drinking water program.
How many people does Eureka Ranger Station serve?
Eureka Ranger Station reports serving 127 people through 9 service connections in Lincoln County, Montana.
Where does Eureka Ranger Station 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 Eureka Ranger Station have any drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in March 2025. 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 Eureka Ranger Station'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 6 violations for this system; 3 are health-based, and the most recent began in March 2025. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Eureka Ranger Station's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Eureka Ranger Station is a non-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 |
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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, “Eureka Ranger Station, PWSID MT0062342, Montana”, https://aquacensus.com/water-systems/montana/eureka-ranger-station-mt0062342 (data as of October 1, 2026).