Public water system · MT0004833
ActiveBig Rose Colony
At a glance
Big Rose Colony (PWSID MT0004833) is an active community water system in Toole County, Montana. It reports serving 75 people through 7 service connections. Its primary water source is purchased groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
75
Service connections
7
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Big Rose Colony compare with other water systems in Toole County?
By EPA's size categories, Big Rose Colony is a very small system (500 people or fewer). Toole County has 18 active public water systems. Its population served is well below the county average of 361 people per system, and accounts for 1.2% of the 6,498 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active community water system reports serving 6,703 people, so Big Rose Colony is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Montana has 853 active community water systems, 36% of the state's 2,378 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 104 Montana systems (4.4%) list purchased groundwater as their primary source.
Who owns and regulates Big Rose Colony?
EPA lists Big Rose Colony 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. 10 of the 18 active systems in Toole County (56%) are also privately owned.
Does Big Rose Colony have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Big Rose Colony. For the latest compliance status, check EPA ECHO for current compliance history.
Big Rose Colony: frequently asked questions
Who runs Big Rose Colony?
Big Rose Colony (PWSID MT0004833) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Big Rose Colony serve?
Big Rose Colony reports serving 75 people through 7 service connections in Toole County, Montana.
Where does Big Rose Colony get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Big Rose Colony have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Big Rose Colony'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Big Rose Colony's water quality report?
As a community water system, Big Rose Colony must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Toole County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Shelby City of | Toole | 3,970 | Community | Groundwater |
| Sunburst Town of | Toole | 459 | Community | Groundwater |
| Oilmont County Water District | Toole | 300 | Community | Groundwater |
| Ncmrwa North Shelby | Toole | 300 | Community | Purchased groundwater |
| Kevin Town of | Toole | 290 | Community | Groundwater |
| Galata County Water District | Toole | 200 | 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, “Big Rose Colony, PWSID MT0004833, Montana”, https://aquacensus.com/water-systems/montana/big-rose-colony-mt0004833 (data as of October 1, 2026).