Public water system · MT0042452
ActiveMedicine Rocks State Park
At a glance
Medicine Rocks State Park (PWSID MT0042452) is an active transient non-community water system in Carter County, Montana. It reports serving 25 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, 4 are health-based, and the most recent began in June 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Medicine Rocks State Park compare with other water systems in Carter County?
By EPA's size categories, Medicine Rocks State Park is a very small system (500 people or fewer). Carter County has 5 active public water systems, and Medicine Rocks State Park is the 5th-largest of them by population served. Its population served is well below the county average of 199 people per system, and accounts for 2.5% of the 996 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 Medicine Rocks State Park 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 Medicine Rocks State Park?
EPA lists Medicine Rocks State Park 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. 1 of the 5 active systems in Carter County (20%) are also owned by a state government.
Does Medicine Rocks State Park have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in June 2023. The violations listed here began between January 2003 and June 2023. By type: 6 monitoring and reporting, 4 contaminant level above the legal limit, 1 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 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 |
|---|---|---|---|---|
| 2023-06-21 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2016-12-01 | 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 |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2015-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2003-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | 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.
Medicine Rocks State Park: frequently asked questions
Who runs Medicine Rocks State Park?
Medicine Rocks State Park (PWSID MT0042452) 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 Medicine Rocks State Park serve?
Medicine Rocks State Park reports serving 25 people through 1 service connection in Carter County, Montana.
Where does Medicine Rocks State Park 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 Medicine Rocks State Park 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 June 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 Medicine Rocks State Park'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 June 2023. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Medicine Rocks State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Medicine Rocks State Park 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 Carter County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Trails End Ranch | Carter | 508 | Transient non-community | Groundwater |
| Ekalaka Town of | Carter | 400 | Community | Groundwater |
| B and Js Convenience Store | Carter | 32 | Transient non-community | Groundwater |
| Stoneville Saloon | Carter | 31 | 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, “Medicine Rocks State Park, PWSID MT0042452, Montana”, https://aquacensus.com/water-systems/montana/medicine-rocks-state-park-mt0042452 (data as of October 1, 2026).