Public water system · MN5090207

Active

Knife Island Campground

At a glance

Knife Island Campground (PWSID MN5090207) is an active transient non-community water system in Carlton County, Minnesota. It reports serving 100 people through 38 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as privately owned. EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in August 2023.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

100

Service connections

Primary source

Groundwater under influence of surface water

System type

TNCWS

Transient non-community water system

System record

PWSIDMN5090207

System typeTransient non-community water system

Activity statusActive

Population served100

Service connections38

Primary water sourceGroundwater under influence of surface water

Owner typePrivate

Primacy agencyMN state drinking water program

City served—

StateMinnesota

ZIP—

CountyCarlton County

How does Knife Island Campground compare with other water systems in Carlton County?

By EPA's size categories, Knife Island Campground is a very small system (500 people or fewer). Carlton County has 75 active public water systems. Its population served is well below the county average of 317 people per system, and accounts for 0.4% of the 23,773 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 Knife Island Campground is about 31% 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 Knife Island Campground?

EPA lists Knife Island Campground 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. 62 of the 75 active systems in Carlton County (83%) are also privately owned.

Does Knife Island Campground have drinking water violations?

EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in August 2023. The violations listed here began between May 2001 and August 2023. By type: 3 monitoring and reporting, 3 contaminant level above the legal limit, 1 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Interim Enhanced Surface Water Treatment Rule (3 of them). EPA lists 8 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
2023-08-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2023-07-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2019-08-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-09-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2009-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2004-07-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2002-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2001-05-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Resolved

All 8 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.

Knife Island Campground: frequently asked questions

Who runs Knife Island Campground?

Knife Island Campground (PWSID MN5090207) is a transient non-community water system privately owned. It is regulated by the MN state drinking water program.

How many people does Knife Island Campground serve?

Knife Island Campground reports serving 100 people through 38 service connections in Carlton County, Minnesota.

Where does Knife Island Campground 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 Knife Island Campground have any drinking water violations?

EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in August 2023. 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 Knife Island Campground'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 8 violations for this system; 4 are health-based, and the most recent began in August 2023. For current results, consult EPA ECHO, or the MN state drinking water program.

Where can I find Knife Island Campground's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Knife Island Campground 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 Carlton County

Water system	County	Population served	Type	Source
Cloquet	Carlton	12,864	Community	Groundwater
Moose Lake	Carlton	1,782	Community	Groundwater
Esko Public School, Isd #99	Carlton	1,200	Non-transient non-community	Groundwater
Carlton	Carlton	1,146	Community	Groundwater
Scanlon	Carlton	1,003	Community	Purchased groundwater
Mn Correctional Facility - Moose Lake	Carlton	975	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, “Knife Island Campground, PWSID MN5090207, Minnesota”, https://aquacensus.com/water-systems/minnesota/knife-island-campground-mn5090207 (data as of October 1, 2026).