Public water system · WI7440914
ActiveMarshfield Clinic Woodruff Center
At a glance
Marshfield Clinic Woodruff Center (PWSID WI7440914) is an active transient non-community water system in Oneida County, Wisconsin. It reports serving 260 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; none is health-based, and the most recent began in January 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
260
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Marshfield Clinic Woodruff Center compare with other water systems in Oneida County?
By EPA's size categories, Marshfield Clinic Woodruff Center is a very small system (500 people or fewer). Oneida County has 345 active public water systems. Its population served is about 121% above the county average of 117 people per system, and accounts for 0.6% of the 40,498 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 Marshfield Clinic Woodruff Center is about 81% above 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 Marshfield Clinic Woodruff Center?
EPA lists Marshfield Clinic Woodruff Center 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. 299 of the 345 active systems in Oneida County (87%) are also privately owned.
Does Marshfield Clinic Woodruff Center have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2021. The violations listed here began between January 2020 and January 2021. By type: 1 monitoring and 1 monitoring and reporting. The contaminants or rules involved are Revised Total Coliform Rule and Nitrite. 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 |
|---|---|---|---|---|
| 2021-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | 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.
Marshfield Clinic Woodruff Center: frequently asked questions
Who runs Marshfield Clinic Woodruff Center?
Marshfield Clinic Woodruff Center (PWSID WI7440914) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Marshfield Clinic Woodruff Center serve?
Marshfield Clinic Woodruff Center reports serving 260 people through 1 service connection in Oneida County, Wisconsin.
Where does Marshfield Clinic Woodruff Center 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 Marshfield Clinic Woodruff Center have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2021. 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 Marshfield Clinic Woodruff Center'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; none is health-based, and the most recent began in January 2021. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Marshfield Clinic Woodruff Center's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Marshfield Clinic Woodruff Center 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 Oneida County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Rhinelander Water & Wastewater | Oneida | 8,234 | Community | Groundwater |
| Lakeland Sanitary Dist 1 | Oneida | 2,381 | Community | Groundwater |
| Minocqua Hazelhurst Elem Sch | Oneida | 650 | Non-transient non-community | Groundwater |
| Three Lakes Sanitary District | Oneida | 500 | Community | Groundwater |
| Scouting America Camp Tesomas Program Center and Dining Hall | Oneida | 500 | Transient non-community | Groundwater |
| Wi Dnr Clear Lk Cmpgd 10 | Oneida | 450 | 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, “Marshfield Clinic Woodruff Center, PWSID WI7440914, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/marshfield-clinic-woodruff-center-wi7440914 (data as of October 1, 2026).