Public water system · MT0062194
ActiveTwin Lakes Campground
At a glance
Twin Lakes Campground (PWSID MT0062194) is an active transient non-community water system in Beaverhead County, Montana. It reports serving 30 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
30
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Twin Lakes Campground compare with other water systems in Beaverhead County?
By EPA's size categories, Twin Lakes Campground is a very small system (500 people or fewer). Beaverhead County has 48 active public water systems. Its population served is well below the county average of 198 people per system, and accounts for 0.3% of the 9,494 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 Twin Lakes Campground 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 Twin Lakes Campground?
EPA lists Twin Lakes Campground 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. 18 of the 48 active systems in Beaverhead County (38%) are also owned by the federal government.
Does Twin Lakes Campground have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2025. The violations listed here began between June 2005 and October 2025. By type: 10 monitoring and reporting, 1 reporting and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 10 as resolved and 2 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Unaddressed |
| 2025-08-15 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Unaddressed |
| 2023-09-16 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2023-07-28 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2019-07-22 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2015-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2006-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
The 12 most recent 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.
Twin Lakes Campground: frequently asked questions
Who runs Twin Lakes Campground?
Twin Lakes Campground (PWSID MT0062194) is a transient non-community water system owned by the federal government. It is regulated by the MT state drinking water program.
How many people does Twin Lakes Campground serve?
Twin Lakes Campground reports serving 30 people through 2 service connections in Beaverhead County, Montana.
Where does Twin Lakes Campground 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 Twin Lakes Campground have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 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 Twin Lakes Campground'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. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2025. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Twin Lakes Campground's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Twin Lakes Campground 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 Beaverhead County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dillon City of | Beaverhead | 4,300 | Community | Groundwater |
| Town Pump Dillon 2 | Beaverhead | 924 | Transient non-community | Groundwater |
| Bannack St Park Visitor Center | Beaverhead | 410 | Transient non-community | Groundwater |
| Maverick Mountain Resort LLC | Beaverhead | 340 | Transient non-community | Groundwater under influence of surface water |
| Keller Subdivision No 2 Hoa | Beaverhead | 300 | Community | Groundwater |
| Hildreth Subdivision No 2 | Beaverhead | 300 | 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, “Twin Lakes Campground, PWSID MT0062194, Montana”, https://aquacensus.com/water-systems/montana/twin-lakes-campground-mt0062194 (data as of October 1, 2026).