Public water system · MT0003355
ActiveCathedral Mountain Ranch
At a glance
Cathedral Mountain Ranch (PWSID MT0003355) is an active transient non-community water system in Stillwater County, Montana. It reports serving 58 people through 35 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
58
Service connections
35
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Cathedral Mountain Ranch compare with other water systems in Stillwater County?
By EPA's size categories, Cathedral Mountain Ranch is a very small system (500 people or fewer). Stillwater County has 30 active public water systems. Its population served is well below the county average of 278 people per system, and accounts for 0.7% of the 8,352 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 Cathedral Mountain Ranch 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. 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 Cathedral Mountain Ranch?
EPA lists Cathedral Mountain Ranch 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. 21 of the 30 active systems in Stillwater County (70%) are also privately owned.
Does Cathedral Mountain Ranch have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in January 2024. The violations listed here began between June 2003 and January 2024. By type: 8 monitoring and reporting, 3 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2022-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2009-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The 12 most recent 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.
Cathedral Mountain Ranch: frequently asked questions
Who runs Cathedral Mountain Ranch?
Cathedral Mountain Ranch (PWSID MT0003355) is a transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Cathedral Mountain Ranch serve?
Cathedral Mountain Ranch reports serving 58 people through 35 service connections in Stillwater County, Montana.
Where does Cathedral Mountain Ranch 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 Cathedral Mountain Ranch have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in January 2024. 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 Cathedral Mountain Ranch'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. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in January 2024. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Cathedral Mountain Ranch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cathedral Mountain Ranch 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 Stillwater County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Columbus Town of | Stillwater | 1,900 | Community | Groundwater |
| Cenex Zip Trip Num 50 | Stillwater | 1,500 | Transient non-community | Groundwater |
| Absarokee Water and Sewer Dist | Stillwater | 1,100 | Community | Groundwater |
| Columbus Rest Area Eastbound | Stillwater | 800 | Transient non-community | Groundwater |
| Columbus Rest Area Westbound | Stillwater | 800 | Transient non-community | Groundwater |
| Stillwater Mining Company | Stillwater | 630 | Non-transient non-community | Groundwater |
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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, “Cathedral Mountain Ranch, PWSID MT0003355, Montana”, https://aquacensus.com/water-systems/montana/cathedral-mountain-ranch-mt0003355 (data as of October 1, 2026).