Public water system · MT0002688
ActiveHysham Rest Area Westbound
At a glance
Hysham Rest Area Westbound (PWSID MT0002688) is an active transient non-community water system in Treasure County, Montana. It reports serving 500 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
500
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Hysham Rest Area Westbound compare with other water systems in Treasure County?
By EPA's size categories, Hysham Rest Area Westbound is a very small system (500 people or fewer). Treasure County has 3 active public water systems, and Hysham Rest Area Westbound is the largest of them by population served. Its population served is about 29% above the county average of 387 people per system, and accounts for 43% of the 1,162 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 Hysham Rest Area Westbound is about 3.5 times 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 Hysham Rest Area Westbound?
EPA lists Hysham Rest Area Westbound as owned by a state government. 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. 2 of the 3 active systems in Treasure County (67%) are also owned by a state government.
Does Hysham Rest Area Westbound have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2021. The violations listed here began between December 1994 and January 2021. By type: 10 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 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 |
|---|---|---|---|---|
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2016-08-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-03-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2005-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-12-01 | 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.
Hysham Rest Area Westbound: frequently asked questions
Who runs Hysham Rest Area Westbound?
Hysham Rest Area Westbound (PWSID MT0002688) is a transient non-community water system owned by a state government. It is regulated by the MT state drinking water program.
How many people does Hysham Rest Area Westbound serve?
Hysham Rest Area Westbound reports serving 500 people through 1 service connection in Treasure County, Montana.
Where does Hysham Rest Area Westbound 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 Hysham Rest Area Westbound have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2021. 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 Hysham Rest Area Westbound'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, one is health-based, and the most recent began in January 2021. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Hysham Rest Area Westbound's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Hysham Rest Area Westbound 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 Treasure County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Hysham Rest Area Eastbound | Treasure | 400 | Transient non-community | Groundwater |
| Hysham Town of | Treasure | 262 | Community | Surface water |
Related pages
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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, “Hysham Rest Area Westbound, PWSID MT0002688, Montana”, https://aquacensus.com/water-systems/montana/hysham-rest-area-westbound-mt0002688 (data as of October 1, 2026).