Public water system · WI1220178
ActiveWi Historical Stonefield Ag Museum
At a glance
Wi Historical Stonefield Ag Museum (PWSID WI1220178) is an active transient non-community water system in Grant County, Wisconsin. It reports serving 300 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 7 violations for this system; 1 is health-based, and the most recent began in May 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Wi Historical Stonefield Ag Museum compare with other water systems in Grant County?
By EPA's size categories, Wi Historical Stonefield Ag Museum is a very small system (500 people or fewer). Grant County has 90 active public water systems. Its population served is about 35% below the county average of 463 people per system, and accounts for 0.7% of the 41,674 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 Historical Stonefield Ag Museum is about twice 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 Historical Stonefield Ag Museum?
EPA lists Wi Historical Stonefield Ag Museum 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. 14 of the 90 active systems in Grant County (16%) are also owned by a state government.
Does Wi Historical Stonefield Ag Museum have drinking water violations?
EPA's records list 7 violations for this system; 1 is health-based, and the most recent began in May 2024. The violations listed here began between July 2001 and May 2024. By type: 3 monitoring and reporting, 2 monitoring, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2024-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-11-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2022-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2007-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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 Historical Stonefield Ag Museum: frequently asked questions
Who runs Wi Historical Stonefield Ag Museum?
Wi Historical Stonefield Ag Museum (PWSID WI1220178) 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 Historical Stonefield Ag Museum serve?
Wi Historical Stonefield Ag Museum reports serving 300 people through 1 service connection in Grant County, Wisconsin.
Where does Wi Historical Stonefield Ag Museum 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 Historical Stonefield Ag Museum have any drinking water violations?
EPA's records list 7 violations for this system; 1 is health-based, and the most recent began in May 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 Wi Historical Stonefield Ag Museum'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 7 violations for this system; 1 is health-based, and the most recent began in May 2024. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Wi Historical Stonefield Ag Museum's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wi Historical Stonefield Ag Museum 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 Grant County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Platteville Waterworks | Grant | 12,268 | Community | Groundwater |
| Lancaster Waterworks | Grant | 3,907 | Community | Groundwater |
| Boscobel Waterworks | Grant | 3,237 | Community | Groundwater |
| Fennimore Waterworks | Grant | 2,507 | Community | Groundwater |
| Cuba City Waterworks | Grant | 2,141 | Community | Groundwater |
| Muscoda Waterworks | Grant | 1,453 | 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 Historical Stonefield Ag Museum, PWSID WI1220178, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/wi-historical-stonefield-ag-museum-wi1220178 (data as of October 1, 2026).