Public water system · MT0000759
ActiveThree Forks Koa
At a glance
Three Forks Koa (PWSID MT0000759) is an active transient non-community water system in Broadwater County, Montana. It reports serving 202 people through 71 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, 4 are health-based, and the most recent began in September 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
202
Service connections
71
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Three Forks Koa compare with other water systems in Broadwater County?
By EPA's size categories, Three Forks Koa is a very small system (500 people or fewer). Broadwater County has 20 active public water systems. Its population served is about 57% below the county average of 465 people per system, and accounts for 2.2% of the 9,301 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 Three Forks Koa is about 40% above 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 Three Forks Koa?
EPA lists Three Forks Koa 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. 16 of the 20 active systems in Broadwater County (80%) are also privately owned.
Does Three Forks Koa have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in September 2025. The violations listed here began between August 2011 and September 2025. By type: 7 monitoring and reporting, 3 required treatment not met, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (4 of them). EPA lists 11 as resolved and 1 as archived. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-09-09 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2019-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-05-16 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2016-05-16 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2014-06-10 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2014-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | 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.
Three Forks Koa: frequently asked questions
Who runs Three Forks Koa?
Three Forks Koa (PWSID MT0000759) is a transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Three Forks Koa serve?
Three Forks Koa reports serving 202 people through 71 service connections in Broadwater County, Montana.
Where does Three Forks Koa 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 Three Forks Koa 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 September 2025. 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 Three Forks Koa'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 September 2025. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Three Forks Koa's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Three Forks Koa 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 Broadwater County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wheat Montana Bakery | Broadwater | 2,453 | Non-transient non-community | Groundwater |
| Town Pump Three Forks 1 | Broadwater | 2,245 | Non-transient non-community | Groundwater |
| Townsend City of | Broadwater | 2,000 | Community | Groundwater |
| Bridger Brewing Three Forks | Broadwater | 470 | Non-transient non-community | Groundwater |
| Steer Inn Teasers Restaurant and Lounge | Broadwater | 233 | Non-transient non-community | Groundwater |
| Canyon Ferry Lake Koa | Broadwater | 218 | 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, “Three Forks Koa, PWSID MT0000759, Montana”, https://aquacensus.com/water-systems/montana/three-forks-koa-mt0000759 (data as of October 1, 2026).