Public water system · WI2670344
ActiveHahn Ace Hardware
At a glance
Hahn Ace Hardware (PWSID WI2670344) is an active transient non-community water system in Washington County, Wisconsin. It reports serving 120 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in July 1991.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
120
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Hahn Ace Hardware compare with other water systems in Washington County?
By EPA's size categories, Hahn Ace Hardware is a very small system (500 people or fewer). Washington County has 268 active public water systems. Its population served is well below the county average of 496 people per system, and accounts for less than 0.1% of the 132,959 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 Hahn Ace Hardware is about 17% below 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 Hahn Ace Hardware?
EPA lists Hahn Ace Hardware 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. 225 of the 268 active systems in Washington County (84%) are also privately owned.
Does Hahn Ace Hardware have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 1991. By type: 1 monitoring and reporting. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1991-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
The one violation in EPA's records.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.
Hahn Ace Hardware: frequently asked questions
Who runs Hahn Ace Hardware?
Hahn Ace Hardware (PWSID WI2670344) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Hahn Ace Hardware serve?
Hahn Ace Hardware reports serving 120 people through 1 service connection in Washington County, Wisconsin.
Where does Hahn Ace Hardware 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 Hahn Ace Hardware have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 1991. 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 Hahn Ace Hardware'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 one violation for this system; it is not health-based, and the most recent began in July 1991. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Hahn Ace Hardware's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Hahn Ace Hardware 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 Washington County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| West Bend Waterworks | Washington | 31,752 | Community | Groundwater |
| Germantown Water Utility | Washington | 20,027 | Community | Groundwater |
| Hartford Waterworks | Washington | 15,805 | Community | Groundwater |
| Jackson Waterworks | Washington | 7,844 | Community | Groundwater |
| Slinger Water Utility | Washington | 5,659 | Community | Groundwater |
| Kewaskum Waterworks | Washington | 4,309 | 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, “Hahn Ace Hardware, PWSID WI2670344, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/hahn-ace-hardware-wi2670344 (data as of October 1, 2026).