Public water system · WI6561021
ActiveWi Dnr Willow River Grp Cmpgd
At a glance
Wi Dnr Willow River Grp Cmpgd (PWSID WI6561021) is an active transient non-community water system in St. Croix County, Wisconsin. It reports serving 130 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 2 violations for this system; all are health-based, and the most recent began in August 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
130
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Wi Dnr Willow River Grp Cmpgd compare with other water systems in St. Croix County?
By EPA's size categories, Wi Dnr Willow River Grp Cmpgd is a very small system (500 people or fewer). St. Croix County has 165 active public water systems. Its population served is about 63% below the county average of 349 people per system, and accounts for 0.2% of the 57,590 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 Wi Dnr Willow River Grp Cmpgd is roughly in line with 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 Wi Dnr Willow River Grp Cmpgd?
EPA lists Wi Dnr Willow River Grp Cmpgd as owned by a state 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. 8 of the 165 active systems in St. Croix County (4.8%) are also owned by a state government.
Does Wi Dnr Willow River Grp Cmpgd have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in August 2015. The violations listed here began between June 2013 and August 2015. 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 |
|---|---|---|---|---|
| 2015-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-06-01 | 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.
Wi Dnr Willow River Grp Cmpgd: frequently asked questions
Who runs Wi Dnr Willow River Grp Cmpgd?
Wi Dnr Willow River Grp Cmpgd (PWSID WI6561021) is a transient non-community water system owned by a state government. It is regulated by the WI state drinking water program.
How many people does Wi Dnr Willow River Grp Cmpgd serve?
Wi Dnr Willow River Grp Cmpgd reports serving 130 people through 1 service connection in St. Croix County, Wisconsin.
Where does Wi Dnr Willow River Grp Cmpgd 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 Wi Dnr Willow River Grp Cmpgd have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in August 2015. 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 Wi Dnr Willow River Grp Cmpgd'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 August 2015. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Wi Dnr Willow River Grp Cmpgd's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wi Dnr Willow River Grp Cmpgd 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 St. Croix County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Hudson Waterworks | St. Croix | 18,558 | Community | Groundwater |
| New Richmond Waterworks | St. Croix | 10,824 | Community | Groundwater |
| Baldwin Waterworks | St. Croix | 4,440 | Community | Groundwater |
| Somerset Waterworks | St. Croix | 3,334 | Community | Groundwater |
| Hammond Waterworks | St. Croix | 1,884 | Community | Groundwater |
| Roberts Waterworks | St. Croix | 1,872 | 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, “Wi Dnr Willow River Grp Cmpgd, PWSID WI6561021, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/wi-dnr-willow-river-grp-cmpgd-wi6561021 (data as of October 1, 2026).