Public water system · MT0004832
ActiveGrassland Colony
At a glance
Grassland Colony (PWSID MT0004832) is an active community water system in Cascade County, Montana. It reports serving 80 people through 12 service connections. Its primary water source is 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
80
Service connections
12
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Grassland Colony compare with other water systems in Cascade County?
By EPA's size categories, Grassland Colony is a very small system (500 people or fewer). Cascade County has 98 active public water systems. Its population served is well below the county average of 985 people per system, and accounts for less than 0.1% of the 96,513 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 Grassland 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. 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 Grassland Colony?
EPA lists Grassland 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. 73 of the 98 active systems in Cascade County (74%) are also privately owned.
Does Grassland 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 Grassland Colony. For the latest compliance status, check EPA ECHO for current compliance history.
Grassland Colony: frequently asked questions
Who runs Grassland Colony?
Grassland Colony (PWSID MT0004832) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Grassland Colony serve?
Grassland Colony reports serving 80 people through 12 service connections in Cascade County, Montana.
Where does Grassland Colony 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 Grassland Colony have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Grassland 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 Grassland Colony's water quality report?
As a community water system, Grassland 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 Cascade County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Great Falls City of | Cascade | 60,000 | Community | Surface water |
| Malmstrom Air Force Base | Cascade | 8,850 | Community | Purchased surface water |
| Source Giant Springs Inc. | Cascade | 3,007 | Non-transient non-community | Groundwater |
| Montana Expo Park Cascade County | Cascade | 2,510 | Transient non-community | Purchased surface water |
| Sun Prairie Village County | Cascade | 1,800 | Community | Groundwater |
| University of Providence | Cascade | 1,472 | Non-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, “Grassland Colony, PWSID MT0004832, Montana”, https://aquacensus.com/water-systems/montana/grassland-colony-mt0004832 (data as of October 1, 2026).