Public water system · WI4390455
ActiveChateau Tavern
At a glance
Chateau Tavern (PWSID WI4390455) is an active transient non-community water system in Marquette County, Wisconsin. It reports serving 40 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in September 2010.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Chateau Tavern compare with other water systems in Marquette County?
By EPA's size categories, Chateau Tavern is a very small system (500 people or fewer). Marquette County has 157 active public water systems. Its population served is about 66% below the county average of 118 people per system, and accounts for 0.2% of the 18,458 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 Chateau Tavern 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 Chateau Tavern?
EPA lists Chateau Tavern 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. 142 of the 157 active systems in Marquette County (90%) are also privately owned.
Does Chateau Tavern have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in September 2010. The violations listed here began between January 1999 and September 2010. By type: 3 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2010-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 4 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.
Chateau Tavern: frequently asked questions
Who runs Chateau Tavern?
Chateau Tavern (PWSID WI4390455) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Chateau Tavern serve?
Chateau Tavern reports serving 40 people through 1 service connection in Marquette County, Wisconsin.
Where does Chateau Tavern 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 Chateau Tavern have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in September 2010. 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 Chateau Tavern'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 4 violations for this system; 1 is health-based, and the most recent began in September 2010. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Chateau Tavern's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Chateau Tavern 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 |
|---|---|---|---|---|
| Wi Dot Rest Area 81 Southbound | Marquette | 1,400 | Transient non-community | Groundwater |
| Wi Dot Rest Area 82 Northbound | Marquette | 1,350 | Transient non-community | Groundwater |
| Montello Waterworks | Marquette | 1,329 | Community | Groundwater |
| Mcdonalds Westfield | Marquette | 1,040 | Non-transient non-community | Groundwater |
| Kwik Trip #1722 | Marquette | 999 | Transient non-community | Groundwater |
| Brakebush Bros Inc. | Marquette | 898 | Non-transient non-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, “Chateau Tavern, PWSID WI4390455, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/chateau-tavern-wi4390455 (data as of October 1, 2026).