Public water system · MN5450051
ActiveOld Mill State Park
At a glance
Old Mill State Park (PWSID MN5450051) is an active transient non-community water system in Marshall County, Minnesota. It reports serving 50 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. 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
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Old Mill State Park compare with other water systems in Marshall County?
By EPA's size categories, Old Mill State Park is a very small system (500 people or fewer). Marshall County has 17 active public water systems. Its population served is well below the county average of 467 people per system, and accounts for 0.6% of the 7,939 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 Old Mill State Park 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 Old Mill State Park?
EPA lists Old Mill State Park as owned by a state government. 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. 1 of the 17 active systems in Marshall County (5.9%) are also owned by a state government.
Does Old Mill State Park 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 Old Mill State Park. For the latest compliance status, check EPA ECHO for current compliance history.
Old Mill State Park: frequently asked questions
Who runs Old Mill State Park?
Old Mill State Park (PWSID MN5450051) is a transient non-community water system owned by a state government. It is regulated by the MN state drinking water program.
How many people does Old Mill State Park serve?
Old Mill State Park reports serving 50 people through 1 service connection in Marshall County, Minnesota.
Where does Old Mill 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 Old Mill State Park have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Old Mill 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. 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 Old Mill State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Old Mill 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 Marshall County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Marshall-Polk Rural Water System | Marshall | 3,295 | Community | Groundwater |
| Warren | Marshall | 1,551 | Community | Groundwater |
| Stephen | Marshall | 568 | Community | Purchased groundwater |
| Argyle | Marshall | 533 | Community | Groundwater |
| Alvarado | Marshall | 377 | Community | Purchased groundwater |
| Newfolden | Marshall | 338 | 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, “Old Mill State Park, PWSID MN5450051, Minnesota”, https://aquacensus.com/water-systems/minnesota/old-mill-state-park-mn5450051 (data as of October 1, 2026).