Public water system · MI2017552
ActiveMdot - Lake Superior, R-121
At a glance
Mdot - Lake Superior, R-121 (PWSID MI2017552) is an active transient non-community water system in Marquette County, Michigan. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mdot - Lake Superior, R-121 compare with other water systems in Marquette County?
By EPA's size categories, Mdot - Lake Superior, R-121 is a very small system (500 people or fewer). Marquette County has 89 active public water systems. Its population served is well below the county average of 625 people per system, and accounts for less than 0.1% of the 55,581 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 Mdot - Lake Superior, R-121 is well 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. Michigan has 7,865 active transient non-community water systems, 74% of the state's 10,599 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,214 Michigan systems (96%) list groundwater as their primary source.
Who owns and regulates Mdot - Lake Superior, R-121?
EPA lists Mdot - Lake Superior, R-121 as owned by a state 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. 5 of the 89 active systems in Marquette County (5.6%) are also owned by a state government.
Does Mdot - Lake Superior, R-121 have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Mdot - Lake Superior, R-121. For the latest compliance status, check EPA ECHO for current compliance history.
Mdot - Lake Superior, R-121: frequently asked questions
Who runs Mdot - Lake Superior, R-121?
Mdot - Lake Superior, R-121 (PWSID MI2017552) is a transient non-community water system owned by a state government. It is regulated by the MI state drinking water program.
How many people does Mdot - Lake Superior, R-121 serve?
Mdot - Lake Superior, R-121 reports serving 25 people through 1 service connection in Marquette County, Michigan.
Where does Mdot - Lake Superior, R-121 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 Mdot - Lake Superior, R-121 have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Mdot - Lake Superior, R-121'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the MI state drinking water program.
Where can I find Mdot - Lake Superior, R-121's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mdot - Lake Superior, R-121 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 Marquette County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Marquette | Marquette | 20,629 | Community | Surface water |
| Ishpeming | Marquette | 6,470 | Community | Purchased groundwater |
| Negaunee | Marquette | 4,568 | Community | Purchased groundwater |
| K I Sawyer | Marquette | 3,000 | Community | Groundwater |
| Marquette Township | Marquette | 2,700 | Community | Purchased surface water |
| Forsyth Township | Marquette | 2,479 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Mdot - Lake Superior, R-121, PWSID MI2017552, Michigan”, https://aquacensus.com/water-systems/michigan/mdot-lake-superior-r-121-mi2017552 (data as of October 1, 2026).