Public water system · MT0004782
ActiveBrush Lake State Park
At a glance
Brush Lake State Park (PWSID MT0004782) is an active transient non-community water system in Sheridan County, Montana. It reports serving 58 people through 5 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by the federal government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
58
Service connections
5
Primary source
SWP
Purchased surface water
System type
TNCWS
Transient non-community water system
System record
How does Brush Lake State Park compare with other water systems in Sheridan County?
By EPA's size categories, Brush Lake State Park is a very small system (500 people or fewer). Sheridan County has 8 active public water systems, and Brush Lake State Park is the 6th-largest of them by population served. Its population served is well below the county average of 346 people per system, and accounts for 2.1% of the 2,764 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 Brush Lake State Park is about 60% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 212 Montana systems (8.9%) list purchased surface water as their primary source.
Who owns and regulates Brush Lake State Park?
EPA lists Brush Lake State Park 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. 2 of the 8 active systems in Sheridan County (25%) are also owned by the federal government.
Does Brush Lake State Park have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2023. The violations listed here began between May 2013 and October 2023. By type: 4 monitoring and reporting and 2 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 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 |
|---|---|---|---|---|
| 2023-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-05-01 | 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.
Brush Lake State Park: frequently asked questions
Who runs Brush Lake State Park?
Brush Lake State Park (PWSID MT0004782) 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 Brush Lake State Park serve?
Brush Lake State Park reports serving 58 people through 5 service connections in Sheridan County, Montana.
Where does Brush Lake State Park get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Brush Lake State Park have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2023. 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 Brush Lake State Park'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; none is health-based, and the most recent began in October 2023. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Brush Lake State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Brush Lake State Park 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 Sheridan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Plentywood Water Department | Sheridan | 1,700 | Community | Purchased surface water |
| Medicine Lake Town of | Sheridan | 600 | Community | Purchased surface water |
| Westby Town of | Sheridan | 172 | Community | Purchased surface water |
| Outlook County Sewer and Water | Sheridan | 96 | Community | Groundwater |
| Antelope County Water and Sewer | Sheridan | 59 | Community | Purchased surface water |
| Sunset Camping LLC | Sheridan | 42 | Transient non-community | Purchased 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, “Brush Lake State Park, PWSID MT0004782, Montana”, https://aquacensus.com/water-systems/montana/brush-lake-state-park-mt0004782 (data as of October 1, 2026).