Public water system · MT0001830

Active

Elkhorn Ranch

At a glance

Elkhorn Ranch (PWSID MT0001830) is an active transient non-community water system in Gallatin County, Montana. It reports serving 65 people through 25 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in April 2026.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

Service connections

Primary source

Groundwater under influence of surface water

System type

TNCWS

Transient non-community water system

System record

PWSIDMT0001830

System typeTransient non-community water system

Activity statusActive

Population served65

Service connections25

Primary water sourceGroundwater under influence of surface water

Owner typePrivate

Primacy agencyMT state drinking water program

City servedGallatin Gateway

StateMontana

ZIP—

CountyGallatin County

How does Elkhorn Ranch compare with other water systems in Gallatin County?

By EPA's size categories, Elkhorn Ranch is a very small system (500 people or fewer). Gallatin County has 207 active public water systems. Its population served is well below the county average of 713 people per system, and accounts for less than 0.1% of the 147,534 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 Elkhorn Ranch is about half of 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 under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 8 Montana systems (0.3%) list groundwater under influence of surface water as their primary source.

Who owns and regulates Elkhorn Ranch?

EPA lists Elkhorn 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. 180 of the 207 active systems in Gallatin County (87%) are also privately owned.

Does Elkhorn Ranch have drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in April 2026. The violations listed here began between November 2025 and April 2026. By type: 5 monitoring, 4 required treatment not met and 3 monitoring and reporting. The contaminant or rule involved most often is Surface Water Treatment Rule (7 of them). EPA lists 8 as archived and 4 as unaddressed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2026-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2026-03-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2026-02-01	Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31	Surface Water Treatment Rulecode 0200	No	Archived
2026-02-01	Required treatment not metFailure to Filter (SWTR) · code 42	Surface Water Treatment Rulecode 0200	Yes	Unaddressed
2026-02-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2026-01-01	Required treatment not metFailure to Filter (SWTR) · code 42	Surface Water Treatment Rulecode 0200	Yes	Unaddressed
2026-01-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2026-01-01	Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31	Surface Water Treatment Rulecode 0200	No	Archived
2025-12-01	Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31	Surface Water Treatment Rulecode 0200	No	Archived
2025-12-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2025-12-01	Required treatment not metFailure to Filter (SWTR) · code 42	Surface Water Treatment Rulecode 0200	Yes	Unaddressed
2025-11-01	Required treatment not metFailure to Filter (SWTR) · code 42	Surface Water Treatment Rulecode 0200	Yes	Unaddressed

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.

Elkhorn Ranch: frequently asked questions

Who runs Elkhorn Ranch?

Elkhorn Ranch (PWSID MT0001830) is a transient non-community water system privately owned. It is regulated by the MT state drinking water program.

How many people does Elkhorn Ranch serve?

Elkhorn Ranch reports serving 65 people through 25 service connections in Gallatin County, Montana.

Where does Elkhorn Ranch get its water?

EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.

Does Elkhorn Ranch have any drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in April 2026. 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 Elkhorn 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, 4 are health-based, and the most recent began in April 2026. For current results, consult EPA ECHO, or the MT state drinking water program.

Where can I find Elkhorn Ranch's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Elkhorn 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 Gallatin County

Water system	County	Population served	Type	Source
Bozeman City of	Gallatin	56,000	Community	Surface water
Montana State University Bozeman	Gallatin	19,200	Non-transient non-community	Purchased surface water
Belgrade City of	Gallatin	10,460	Community	Groundwater
West Yellowstone Town of	Gallatin	9,899	Community	Groundwater
North Star Zoot Water	Gallatin	4,323	Community	Groundwater
River Rock County Water and Sewer Dist	Gallatin	4,200	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, “Elkhorn Ranch, PWSID MT0001830, Montana”, https://aquacensus.com/water-systems/montana/elkhorn-ranch-mt0001830 (data as of October 1, 2026).