Public water system · MN5870050
ActiveThe Rock
At a glance
The Rock (PWSID MN5870050) is an active transient non-community water system in Yellow Medicine County, Minnesota. It reports serving 50 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does The Rock compare with other water systems in Yellow Medicine County?
By EPA's size categories, The Rock is a very small system (500 people or fewer). Yellow Medicine County has 13 active public water systems. Its population served is well below the county average of 536 people per system, and accounts for 0.7% of the 6,968 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active transient non-community water system reports serving 144 people, so The Rock is about 65% 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. Minnesota has 5,008 active transient non-community water systems, 77% of the state's 6,465 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,261 Minnesota systems (97%) list groundwater as their primary source.
Who owns and regulates The Rock?
EPA lists The Rock as privately owned. The MN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 13 active systems in Yellow Medicine County (31%) are also privately owned.
Does The Rock have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for The Rock. For the latest compliance status, check EPA ECHO for current compliance history.
The Rock: frequently asked questions
Who runs The Rock?
The Rock (PWSID MN5870050) is a transient non-community water system privately owned. It is regulated by the MN state drinking water program.
How many people does The Rock serve?
The Rock reports serving 50 people through 2 service connections in Yellow Medicine County, Minnesota.
Where does The Rock 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 The Rock have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is The Rock'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. EPA's Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the MN state drinking water program.
Where can I find The Rock's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. The Rock 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 Yellow Medicine County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Granite Falls | Yellow Medicine | 2,843 | Community | Groundwater |
| Canby | Yellow Medicine | 1,769 | Community | Groundwater |
| Clarkfield | Yellow Medicine | 841 | Community | Groundwater |
| Wood Lake | Yellow Medicine | 423 | Community | Groundwater |
| Hanley Falls | Yellow Medicine | 275 | Community | Groundwater |
| Echo | Yellow Medicine | 269 | Community | Purchased 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, “The Rock, PWSID MN5870050, Minnesota”, https://aquacensus.com/water-systems/minnesota/the-rock-mn5870050 (data as of October 1, 2026).