Public water system · WI4380631
ActiveThunder Mt Valley Inn Bar
At a glance
Thunder Mt Valley Inn Bar (PWSID WI4380631) is an active transient non-community water system in Marinette 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 3 violations for this system; 1 is health-based, and the most recent began in October 2024.
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 Thunder Mt Valley Inn Bar compare with other water systems in Marinette County?
By EPA's size categories, Thunder Mt Valley Inn Bar is a very small system (500 people or fewer). Marinette County has 191 active public water systems. Its population served is well below the county average of 141 people per system, and accounts for less than 0.1% of the 26,830 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 Thunder Mt Valley Inn Bar 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 Thunder Mt Valley Inn Bar?
EPA lists Thunder Mt Valley Inn Bar 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. 159 of the 191 active systems in Marinette County (83%) are also privately owned.
Does Thunder Mt Valley Inn Bar have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2024. The violations listed here began between July 2012 and October 2024. By type: 1 public notice, recordkeeping or other, 1 monitoring and 1 contaminant level above the legal limit. The contaminants or rules involved are Public Notice, Revised Total Coliform Rule and Total coliform bacteria (TCR). EPA lists 2 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2012-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 3 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.
Thunder Mt Valley Inn Bar: frequently asked questions
Who runs Thunder Mt Valley Inn Bar?
Thunder Mt Valley Inn Bar (PWSID WI4380631) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Thunder Mt Valley Inn Bar serve?
Thunder Mt Valley Inn Bar reports serving 25 people through 1 service connection in Marinette County, Wisconsin.
Where does Thunder Mt Valley Inn Bar 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 Thunder Mt Valley Inn Bar have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2024. 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 Thunder Mt Valley Inn Bar'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 3 violations for this system; 1 is health-based, and the most recent began in October 2024. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Thunder Mt Valley Inn Bar's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Thunder Mt Valley Inn Bar 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 Marinette County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Marinette Waterworks | Marinette | 10,968 | Community | Surface water |
| Peshtigo Waterworks | Marinette | 3,420 | Community | Groundwater |
| Niagara Waterworks | Marinette | 1,561 | Community | Groundwater |
| Crivitz Waterworks | Marinette | 1,026 | Community | Groundwater |
| Coleman Waterworks | Marinette | 727 | Community | Groundwater |
| Wausaukee Waterworks | Marinette | 585 | 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, “Thunder Mt Valley Inn Bar, PWSID WI4380631, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/thunder-mt-valley-inn-bar-wi4380631 (data as of October 1, 2026).