Public water system · MN5210366
ActiveLake Carlos State Park
At a glance
Lake Carlos State Park (PWSID MN5210366) is an active transient non-community water system in Douglas County, Minnesota. It reports serving 350 people through 31 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 3 violations for this system; all are health-based, and the most recent began in July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
350
Service connections
31
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Lake Carlos State Park compare with other water systems in Douglas County?
By EPA's size categories, Lake Carlos State Park is a very small system (500 people or fewer). Douglas County has 151 active public water systems. Its population served is about 71% above the county average of 204 people per system, and accounts for 1.1% of the 30,846 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 Lake Carlos State Park is about 143% above 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 Lake Carlos State Park?
EPA lists Lake Carlos 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. 2 of the 151 active systems in Douglas County (1.3%) are also owned by a state government.
Does Lake Carlos State Park have drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in July 2015. The violations listed here began between July 2006 and July 2015. By type: 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2006-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 3 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.
Lake Carlos State Park: frequently asked questions
Who runs Lake Carlos State Park?
Lake Carlos State Park (PWSID MN5210366) 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 Lake Carlos State Park serve?
Lake Carlos State Park reports serving 350 people through 31 service connections in Douglas County, Minnesota.
Where does Lake Carlos 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 Lake Carlos State Park have any drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in July 2015. 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 Lake Carlos 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 records list 3 violations for this system; all are health-based, and the most recent began in July 2015. For current results, consult EPA ECHO, or the MN state drinking water program.
Where can I find Lake Carlos State Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Lake Carlos 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 Douglas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Alexandria | Douglas | 15,000 | Community | Groundwater |
| Osakis | Douglas | 1,780 | Community | Groundwater |
| Lake Latoka Rest Area Mndot | Douglas | 1,001 | Transient non-community | Groundwater |
| Brothers Market | Douglas | 900 | Transient non-community | Groundwater |
| Evansville | Douglas | 603 | Community | Groundwater |
| Brandon | Douglas | 501 | 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, “Lake Carlos State Park, PWSID MN5210366, Minnesota”, https://aquacensus.com/water-systems/minnesota/lake-carlos-state-park-mn5210366 (data as of October 1, 2026).