Public water system · MT0005192
ActiveHigh Plains H2o LLC
At a glance
High Plains H2o LLC (PWSID MT0005192) is an active community water system in Cascade County, Montana. It reports serving 25 people through 1 service connection. Its primary water source is purchased surface water, 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
25
Service connections
1
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does High Plains H2o LLC compare with other water systems in Cascade County?
By EPA's size categories, High Plains H2o LLC 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 High Plains H2o LLC 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 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 High Plains H2o LLC?
EPA lists High Plains H2o LLC 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 High Plains H2o LLC 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 High Plains H2o LLC. For the latest compliance status, check EPA ECHO for current compliance history.
High Plains H2o LLC: frequently asked questions
Who runs High Plains H2o LLC?
High Plains H2o LLC (PWSID MT0005192) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does High Plains H2o LLC serve?
High Plains H2o LLC reports serving 25 people through 1 service connection in Cascade County, Montana.
Where does High Plains H2o LLC 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 High Plains H2o LLC have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is High Plains H2o LLC'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 High Plains H2o LLC's water quality report?
As a community water system, High Plains H2o LLC 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 |
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, “High Plains H2o LLC, PWSID MT0005192, Montana”, https://aquacensus.com/water-systems/montana/high-plains-h2o-llc-mt0005192 (data as of October 1, 2026).