Public water system · MI2001742
ActiveIsle Royale - Mott Island
At a glance
Isle Royale - Mott Island (PWSID MI2001742) is an active transient non-community water system in Keweenaw County, Michigan. It reports serving 75 people through 1 service connection. Its primary water source is surface water, and EPA lists it as owned by the federal government. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
75
Service connections
1
Primary source
SW
Surface water
System type
TNCWS
Transient non-community water system
System record
How does Isle Royale - Mott Island compare with other water systems in Keweenaw County?
By EPA's size categories, Isle Royale - Mott Island is a very small system (500 people or fewer). Keweenaw County has 19 active public water systems. Its population served is about half of the county average of 142 people per system, and accounts for 2.8% of the 2,701 people reported by systems filed under the county. Across Michigan, the 10,599 active systems average 847 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Isle Royale - Mott Island is about half of 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. Michigan has 7,865 active transient non-community water systems, 74% of the state's 10,599 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 68 Michigan systems (0.6%) list surface water as their primary source.
Who owns and regulates Isle Royale - Mott Island?
EPA lists Isle Royale - Mott Island as owned by the federal government. The MI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 3 of the 19 active systems in Keweenaw County (16%) are also owned by the federal government.
Does Isle Royale - Mott Island have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2012. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. 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 |
|---|---|---|---|---|
| 2012-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | 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.
Isle Royale - Mott Island: frequently asked questions
Who runs Isle Royale - Mott Island?
Isle Royale - Mott Island (PWSID MI2001742) is a transient non-community water system owned by the federal government. It is regulated by the MI state drinking water program.
How many people does Isle Royale - Mott Island serve?
Isle Royale - Mott Island reports serving 75 people through 1 service connection in Keweenaw County, Michigan.
Where does Isle Royale - Mott Island get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Isle Royale - Mott Island have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2012. 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 Isle Royale - Mott Island'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 not health-based, and the most recent began in January 2012. For current results, consult EPA ECHO, or the MI state drinking water program.
Where can I find Isle Royale - Mott Island's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Isle Royale - Mott Island 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 Keweenaw County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Keweenaw Mountain Lodge | Keweenaw | 485 | Transient non-community | Groundwater under influence of surface water |
| Isle Royale-Rock Harbor | Keweenaw | 335 | Transient non-community | Surface water |
| Eagle Harbor Township | Keweenaw | 300 | Community | Groundwater |
| Dnr - Fort Wilkins State Park | Keweenaw | 225 | Transient non-community | Groundwater |
| Mount Bohemia Ski Resort | Keweenaw | 200 | Transient non-community | Groundwater |
| Grant Township - Copper Harbor | Keweenaw | 200 | 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, “Isle Royale - Mott Island, PWSID MI2001742, Michigan”, https://aquacensus.com/water-systems/michigan/isle-royale-mott-island-mi2001742 (data as of October 1, 2026).