Public water system · MN5390052
ActiveFlag Island Resort
At a glance
Flag Island Resort (PWSID MN5390052) is an active transient non-community water system in Lake of the Woods County, Minnesota. It reports serving 120 people through 27 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
120
Service connections
27
Primary source
GU
Groundwater under influence of surface water
System type
TNCWS
Transient non-community water system
System record
How does Flag Island Resort compare with other water systems in Lake of the Woods County?
By EPA's size categories, Flag Island Resort is a very small system (500 people or fewer). Lake of the Woods County has 66 active public water systems, and Flag Island Resort is the 6th-largest of them by population served. Its population served is about 57% above the county average of 76 people per system, and accounts for 2.4% of the 5,031 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 Flag Island Resort is about 17% 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 under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 17 Minnesota systems (0.3%) list groundwater under influence of surface water as their primary source.
Who owns and regulates Flag Island Resort?
EPA lists Flag Island 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. 58 of the 66 active systems in Lake of the Woods County (88%) are also privately owned.
Does Flag Island Resort have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026. The violations listed here began between October 2025 and March 2026. By type: 10 public notice, recordkeeping or other and 2 monitoring. The contaminant or rule involved most often is Public Notice (10 of them). EPA lists 10 as unaddressed and 2 as archived. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2026-01-10 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2026-01-10 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2026-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2025-12-14 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-12-14 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-11-12 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-11-12 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-10-18 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-10-18 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-10-18 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-10-18 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
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.
Flag Island Resort: frequently asked questions
Who runs Flag Island Resort?
Flag Island Resort (PWSID MN5390052) is a transient non-community water system privately owned. It is regulated by the MN state drinking water program.
How many people does Flag Island Resort serve?
Flag Island Resort reports serving 120 people through 27 service connections in Lake of the Woods County, Minnesota.
Where does Flag Island Resort get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does Flag Island Resort have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026. 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 Flag Island 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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026. For current results, consult EPA ECHO, or the MN state drinking water program.
Where can I find Flag Island Resort's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Flag Island 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 Lake of the Woods County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Baudette | Lake of the Woods | 947 | Community | Groundwater |
| Bethany Lutheran Church | Lake of the Woods | 501 | Transient non-community | Groundwater |
| Rock Harbor Lodge | Lake of the Woods | 200 | Transient non-community | Groundwater |
| Ballard'S Resort | Lake of the Woods | 200 | Transient non-community | Groundwater |
| Marina Drive Campground | Lake of the Woods | 130 | Transient non-community | Groundwater |
| Sunset Lodge | Lake of the Woods | 110 | Transient non-community | Groundwater under influence of surface water |
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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, “Flag Island Resort, PWSID MN5390052, Minnesota”, https://aquacensus.com/water-systems/minnesota/flag-island-resort-mn5390052 (data as of October 1, 2026).