Public water system · WI4710611
ActiveWinchester School
At a glance
Winchester School (PWSID WI4710611) is an active non-transient non-community water system in Winnebago County, Wisconsin. It reports serving 35 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; none is health-based, and the most recent began in July 2002.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
35
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Winchester School compare with other water systems in Winnebago County?
By EPA's size categories, Winchester School is a very small system (500 people or fewer). Winnebago County has 145 active public water systems. Its population served is well below the county average of 1,016 people per system, and accounts for less than 0.1% of the 147,267 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Winchester School is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Wisconsin has 891 active non-transient non-community water systems, 8.1% 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 Winchester School?
EPA lists Winchester School 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. 123 of the 145 active systems in Winnebago County (85%) are also privately owned.
Does Winchester School have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2002. The violations listed here began between January 1995 and July 2002. By type: 3 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2002-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | 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.
Winchester School: frequently asked questions
Who runs Winchester School?
Winchester School (PWSID WI4710611) is a non-transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Winchester School serve?
Winchester School reports serving 35 people through 1 service connection in Winnebago County, Wisconsin.
Where does Winchester School 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 Winchester School have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2002. 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 Winchester School'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; none is health-based, and the most recent began in July 2002. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Winchester School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Winchester School is a non-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 Winnebago County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oshkosh Waterworks | Winnebago | 63,000 | Community | Surface water |
| Neenah Waterworks | Winnebago | 27,506 | Community | Surface water |
| Menasha Elec & Water Util | Winnebago | 15,144 | Community | Surface water |
| Fox Crossing Utilities West | Winnebago | 14,000 | Community | Groundwater |
| Fox Crossing Utilities East | Winnebago | 10,927 | Community | Purchased surface water |
| Algoma Tn Sanitary Dist 1 | Winnebago | 3,935 | 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, “Winchester School, PWSID WI4710611, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/winchester-school-wi4710611 (data as of October 1, 2026).