Public water system · MN5110385
ActiveBig Rock Resort
At a glance
Big Rock Resort (PWSID MN5110385) is an active transient non-community water system in Cass County, Minnesota. It reports serving 150 people through 50 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in January 1999.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
150
Service connections
50
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Big Rock Resort compare with other water systems in Cass County?
By EPA's size categories, Big Rock Resort is a very small system (500 people or fewer). Cass County has 248 active public water systems. Its population served is about 53% above the county average of 98 people per system, and accounts for 0.6% of the 24,374 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 Big Rock Resort is roughly in line with 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 Big Rock Resort?
EPA lists Big Rock Resort 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. 227 of the 248 active systems in Cass County (92%) are also privately owned.
Does Big Rock Resort have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 1999. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 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 |
|---|---|---|---|---|
| 1999-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The one violation in EPA's records.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.
Big Rock Resort: frequently asked questions
Who runs Big Rock Resort?
Big Rock Resort (PWSID MN5110385) is a transient non-community water system privately owned. It is regulated by the MN state drinking water program.
How many people does Big Rock Resort serve?
Big Rock Resort reports serving 150 people through 50 service connections in Cass County, Minnesota.
Where does Big Rock Resort 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 Big Rock Resort have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 1999. 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 Big Rock Resort'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 one violation for this system; it is health-based, and the most recent began in January 1999. For current results, consult EPA ECHO, or the MN state drinking water program.
Where can I find Big Rock Resort's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Big Rock Resort 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 Cass County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Walker | Cass | 990 | Community | Groundwater |
| Pine River | Cass | 939 | Community | Groundwater |
| Cass Lake Wayside Rest Mndot | Cass | 873 | Transient non-community | Groundwater |
| Cass Lake | Cass | 691 | Community | Groundwater |
| Pillager | Cass | 523 | Community | Groundwater |
| Y Mart | Cass | 500 | 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, “Big Rock Resort, PWSID MN5110385, Minnesota”, https://aquacensus.com/water-systems/minnesota/big-rock-resort-mn5110385 (data as of October 1, 2026).