Public water system · MT0001680
ActiveBoulder River Roadkill
At a glance
Boulder River Roadkill (PWSID MT0001680) is an active transient non-community water system in Sweet Grass County, Montana. It reports serving 25 people through 7 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 May 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
7
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Boulder River Roadkill compare with other water systems in Sweet Grass County?
By EPA's size categories, Boulder River Roadkill is a very small system (500 people or fewer). Sweet Grass County has 16 active public water systems. Its population served is well below the county average of 457 people per system, and accounts for 0.3% of the 7,304 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 Boulder River Roadkill 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 Boulder River Roadkill?
EPA lists Boulder River Roadkill 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. 13 of the 16 active systems in Sweet Grass County (81%) are also privately owned.
Does Boulder River Roadkill have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in May 2019. The violations listed here began between April 2016 and May 2019. By type: 8 monitoring, 3 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Revised Total Coliform Rule (12 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 |
|---|---|---|---|---|
| 2019-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-04-02 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2019-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-05-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2018-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-04-02 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-04-02 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | 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.
Boulder River Roadkill: frequently asked questions
Who runs Boulder River Roadkill?
Boulder River Roadkill (PWSID MT0001680) is a transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Boulder River Roadkill serve?
Boulder River Roadkill reports serving 25 people through 7 service connections in Sweet Grass County, Montana.
Where does Boulder River Roadkill 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 Boulder River Roadkill 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 May 2019. 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 Boulder River Roadkill'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 May 2019. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Boulder River Roadkill's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Boulder River Roadkill 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 Sweet Grass County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Greycliff Rest Area Eastbound | Sweet Grass | 2,500 | Transient non-community | Groundwater |
| Big Timber City of | Sweet Grass | 1,650 | Community | Surface water |
| Greycliff Rest Area Westbound | Sweet Grass | 1,000 | Transient non-community | Groundwater |
| Big Timber Koa | Sweet Grass | 600 | Transient non-community | Groundwater |
| Stillwater East Boulder | Sweet Grass | 380 | Non-transient non-community | Groundwater |
| Town Pump 1033 Big Timber # 2 | Sweet Grass | 318 | 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, “Boulder River Roadkill, PWSID MT0001680, Montana”, https://aquacensus.com/water-systems/montana/boulder-river-roadkill-mt0001680 (data as of October 1, 2026).