Public water system · MT0002729
ActiveSt Mary Headquarters and Cg
At a glance
St Mary Headquarters and Cg (PWSID MT0002729) is an active community water system in Glacier County, Montana. It reports serving 1,030 people through 150 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,030
Service connections
150
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does St Mary Headquarters and Cg compare with other water systems in Glacier County?
By EPA's size categories, St Mary Headquarters and Cg is a small system (501 to 3,300 people). Glacier County has 27 active public water systems, and St Mary Headquarters and Cg is the 2nd-largest of them by population served. Its population served is about 159% above the county average of 398 people per system, and accounts for 9.6% of the 10,757 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 St Mary Headquarters and Cg 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 St Mary Headquarters and Cg?
EPA lists St Mary Headquarters and Cg 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. 9 of the 27 active systems in Glacier County (33%) are also owned by the federal government.
Does St Mary Headquarters and Cg 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 St Mary Headquarters and Cg. For the latest compliance status, check EPA ECHO for current compliance history.
St Mary Headquarters and Cg: frequently asked questions
Who runs St Mary Headquarters and Cg?
St Mary Headquarters and Cg (PWSID MT0002729) is a community water system owned by the federal government. It is regulated by the MT state drinking water program.
How many people does St Mary Headquarters and Cg serve?
St Mary Headquarters and Cg reports serving 1,030 people through 150 service connections in Glacier County, Montana.
Where does St Mary Headquarters and Cg 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 St Mary Headquarters and Cg have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is St Mary Headquarters and Cg'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 St Mary Headquarters and Cg's water quality report?
As a community water system, St Mary Headquarters and Cg 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 Glacier County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cut Bank City of | Glacier | 3,105 | Community | Surface water |
| Logan Pass Visitors Center | Glacier | 1,000 | Transient non-community | Surface water |
| St Mary Lodge and Resort | Glacier | 908 | Transient non-community | Groundwater |
| Glacier Park Inc. | Glacier | 765 | Transient non-community | Purchased surface water |
| Many Glacier Lodge Hotel | Glacier | 650 | Transient non-community | Groundwater |
| Cut Bank North Water District | Glacier | 478 | 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, “St Mary Headquarters and Cg, PWSID MT0002729, Montana”, https://aquacensus.com/water-systems/montana/st-mary-headquarters-and-cg-mt0002729 (data as of October 1, 2026).