Public water system · MT0004049
ActiveGrassy Mountain Ranch
At a glance
Grassy Mountain Ranch (PWSID MT0004049) is an active transient non-community water system in Meagher County, Montana. It reports serving 33 people through 8 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
33
Service connections
8
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Grassy Mountain Ranch compare with other water systems in Meagher County?
By EPA's size categories, Grassy Mountain Ranch is a very small system (500 people or fewer). Meagher County has 8 active public water systems. Its population served is well below the county average of 228 people per system, and accounts for 1.8% of the 1,825 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 Grassy Mountain Ranch is well 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 Grassy Mountain Ranch?
EPA lists Grassy 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. 6 of the 8 active systems in Meagher County (75%) are also privately owned.
Does Grassy Mountain Ranch have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2023. The violations listed here began between April 2000 and January 2023. By type: 8 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 8 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.
Grassy Mountain Ranch: frequently asked questions
Who runs Grassy Mountain Ranch?
Grassy Mountain Ranch (PWSID MT0004049) is a transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Grassy Mountain Ranch serve?
Grassy Mountain Ranch reports serving 33 people through 8 service connections in Meagher County, Montana.
Where does Grassy 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 Grassy Mountain Ranch have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2023. 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 Grassy 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. EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2023. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Grassy Mountain Ranch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Grassy 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 Meagher County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| White Sulphur Springs City of | Meagher | 1,000 | Community | Surface water |
| Showdown Ski Lift Inc. | Meagher | 448 | Transient non-community | Groundwater |
| Springdale Hutterite Colony | Meagher | 87 | Community | Groundwater |
| Bair Family Museum | Meagher | 83 | Transient non-community | Groundwater |
| Martinsdale Water and Sewer District | Meagher | 75 | Community | Groundwater |
| Checkerboard Bar Motel and Tr Ct | Meagher | 52 | 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, “Grassy Mountain Ranch, PWSID MT0004049, Montana”, https://aquacensus.com/water-systems/montana/grassy-mountain-ranch-mt0004049 (data as of October 1, 2026).