Public water system · MT0001271
ActiveBig Hole National Battlefield
At a glance
Big Hole National Battlefield (PWSID MT0001271) is an active transient non-community water system in Beaverhead County, Montana. It reports serving 214 people through 8 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 11 violations for this system; none is health-based, and the most recent began in January 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
214
Service connections
8
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Big Hole National Battlefield compare with other water systems in Beaverhead County?
By EPA's size categories, Big Hole National Battlefield is a very small system (500 people or fewer). Beaverhead County has 48 active public water systems. Its population served is roughly in line with the county average of 198 people per system, and accounts for 2.3% 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 Big Hole National Battlefield is about 49% above 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 Big Hole National Battlefield?
EPA lists Big Hole National Battlefield 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 Big Hole National Battlefield have drinking water violations?
EPA's records list 11 violations for this system; none is health-based, and the most recent began in January 2025. The violations listed here began between July 2004 and January 2025. By type: 7 monitoring and reporting and 4 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (4 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2023-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2020-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2004-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 11 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.
Big Hole National Battlefield: frequently asked questions
Who runs Big Hole National Battlefield?
Big Hole National Battlefield (PWSID MT0001271) 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 Big Hole National Battlefield serve?
Big Hole National Battlefield reports serving 214 people through 8 service connections in Beaverhead County, Montana.
Where does Big Hole National Battlefield 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 Big Hole National Battlefield have any drinking water violations?
EPA's records list 11 violations for this system; none is health-based, and the most recent began in January 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 Big Hole National Battlefield'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 11 violations for this system; none is health-based, and the most recent began in January 2025. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Big Hole National Battlefield's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Big Hole National Battlefield 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, “Big Hole National Battlefield, PWSID MT0001271, Montana”, https://aquacensus.com/water-systems/montana/big-hole-national-battlefield-mt0001271 (data as of October 1, 2026).