Public water system · WI7371859
ActiveMt Bay Trail - Norrie
At a glance
Mt Bay Trail - Norrie (PWSID WI7371859) is an active transient non-community water system in Marathon County, Wisconsin. It reports serving 26 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is health-based, and the most recent began in June 2009.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
26
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mt Bay Trail - Norrie compare with other water systems in Marathon County?
By EPA's size categories, Mt Bay Trail - Norrie is a very small system (500 people or fewer). Marathon County has 196 active public water systems. Its population served is well below the county average of 528 people per system, and accounts for less than 0.1% of the 103,490 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Mt Bay Trail - Norrie 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. Wisconsin has 9,112 active transient non-community water systems, 82% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.
Who owns and regulates Mt Bay Trail - Norrie?
EPA lists Mt Bay Trail - Norrie as owned by a local government. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 43 of the 196 active systems in Marathon County (22%) are also owned by a local government.
Does Mt Bay Trail - Norrie have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in June 2009. 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 |
|---|---|---|---|---|
| 2009-06-01 | 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.
Mt Bay Trail - Norrie: frequently asked questions
Who runs Mt Bay Trail - Norrie?
Mt Bay Trail - Norrie (PWSID WI7371859) is a transient non-community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Mt Bay Trail - Norrie serve?
Mt Bay Trail - Norrie reports serving 26 people through 1 service connection in Marathon County, Wisconsin.
Where does Mt Bay Trail - Norrie 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 Mt Bay Trail - Norrie have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in June 2009. 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 Mt Bay Trail - Norrie'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 June 2009. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Mt Bay Trail - Norrie's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mt Bay Trail - Norrie 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 Marathon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wausau Waterworks | Marathon | 39,994 | Community | Groundwater |
| Weston Municipal Utilities | Marathon | 16,000 | Community | Groundwater |
| Kronenwetter Water & Sewer Utility | Marathon | 6,931 | Community | Groundwater |
| Rib Mountain Water Utility | Marathon | 6,398 | Community | Groundwater |
| Mosinee Waterworks | Marathon | 3,406 | Community | Groundwater |
| Rothschild Waterworks | Marathon | 3,190 | 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, “Mt Bay Trail - Norrie, PWSID WI7371859, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/mt-bay-trail-norrie-wi7371859 (data as of October 1, 2026).