Public water system · WI4050121
ActiveSt Mary Catholic Ch
At a glance
St Mary Catholic Ch (PWSID WI4050121) is an active transient non-community water system in Brown County, Wisconsin. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2008.
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 St Mary Catholic Ch compare with other water systems in Brown County?
By EPA's size categories, St Mary Catholic Ch is a very small system (500 people or fewer). Brown County has 148 active public water systems. Its population served is well below the county average of 1,666 people per system, and accounts for less than 0.1% of the 246,537 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 St Mary Catholic Ch 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 St Mary Catholic Ch?
EPA lists St Mary Catholic Ch as privately owned. 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. 106 of the 148 active systems in Brown County (72%) are also privately owned.
Does St Mary Catholic Ch have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2008. The violations listed here began between July 2003 and July 2008. By type: 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 2008-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 2 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.
St Mary Catholic Ch: frequently asked questions
Who runs St Mary Catholic Ch?
St Mary Catholic Ch (PWSID WI4050121) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does St Mary Catholic Ch serve?
St Mary Catholic Ch reports serving 25 people through 1 service connection in Brown County, Wisconsin.
Where does St Mary Catholic Ch 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 St Mary Catholic Ch have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2008. 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 St Mary Catholic Ch'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 2 violations for this system; all are health-based, and the most recent began in July 2008. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find St Mary Catholic Ch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. St Mary Catholic Ch 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 Brown County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Green Bay Waterworks | Brown | 107,369 | Community | Surface water |
| De Pere Waterworks Sa 1 | Brown | 25,660 | Community | Purchased surface water |
| Howard Waterworks | Brown | 21,133 | Community | Purchased surface water |
| Ashwaubenon Waterworks | Brown | 17,730 | Community | Purchased surface water |
| Bellevue Waterworks | Brown | 16,715 | Community | Purchased surface water |
| Allouez Waterworks | Brown | 13,923 | Community | Purchased 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, “St Mary Catholic Ch, PWSID WI4050121, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/st-mary-catholic-ch-wi4050121 (data as of October 1, 2026).