Public water system · WI1280004
ActiveMckay Nursery Corporate Hdqtrs
At a glance
Mckay Nursery Corporate Hdqtrs (PWSID WI1280004) is an active non-transient non-community water system in Jefferson County, Wisconsin. It reports serving 55 people through 3 service connections. 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 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
55
Service connections
3
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Mckay Nursery Corporate Hdqtrs compare with other water systems in Jefferson County?
By EPA's size categories, Mckay Nursery Corporate Hdqtrs is a very small system (500 people or fewer). Jefferson County has 195 active public water systems. Its population served is well below the county average of 453 people per system, and accounts for less than 0.1% of the 88,343 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 Mckay Nursery Corporate Hdqtrs 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 Mckay Nursery Corporate Hdqtrs?
EPA lists Mckay Nursery Corporate Hdqtrs 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. 152 of the 195 active systems in Jefferson County (78%) are also privately owned.
Does Mckay Nursery Corporate Hdqtrs have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2021. The violations listed here began between August 2001 and October 2021. By type: 2 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (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 |
|---|---|---|---|---|
| 2021-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2001-08-01 | 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.
Mckay Nursery Corporate Hdqtrs: frequently asked questions
Who runs Mckay Nursery Corporate Hdqtrs?
Mckay Nursery Corporate Hdqtrs (PWSID WI1280004) is a non-transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Mckay Nursery Corporate Hdqtrs serve?
Mckay Nursery Corporate Hdqtrs reports serving 55 people through 3 service connections in Jefferson County, Wisconsin.
Where does Mckay Nursery Corporate Hdqtrs 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 Mckay Nursery Corporate Hdqtrs 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 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 Mckay Nursery Corporate Hdqtrs' 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 2021. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Mckay Nursery Corporate Hdqtrs' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mckay Nursery Corporate Hdqtrs 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 Jefferson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Watertown Waterworks | Jefferson | 23,945 | Community | Groundwater |
| Fort Atkinson Waterworks | Jefferson | 12,390 | Community | Groundwater |
| Jefferson Waterworks | Jefferson | 7,926 | Community | Groundwater |
| Lake Mills Waterworks | Jefferson | 6,211 | Community | Groundwater |
| Waterloo Waterworks | Jefferson | 3,520 | Community | Groundwater |
| Johnson Creek Waterworks | Jefferson | 3,318 | 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, “Mckay Nursery Corporate Hdqtrs, PWSID WI1280004, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/mckay-nursery-corporate-hdqtrs-wi1280004 (data as of October 1, 2026).