Public water system · WI2461466
ActiveHahn Ace
At a glance
Hahn Ace (PWSID WI2461466) is an active transient non-community water system in Ozaukee County, Wisconsin. It reports serving 190 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2001.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
190
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Hahn Ace compare with other water systems in Ozaukee County?
By EPA's size categories, Hahn Ace is a very small system (500 people or fewer). Ozaukee County has 249 active public water systems. Its population served is about half of the county average of 371 people per system, and accounts for 0.2% of the 92,392 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 is about 32% 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 Hahn Ace?
EPA lists Hahn Ace 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. 218 of the 249 active systems in Ozaukee County (88%) are also privately owned.
Does Hahn Ace have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2001. The violations listed here began between January 2001 and January 2001. By type: 12 monitoring and reporting. The contaminants or rules involved are Vinyl chloride, trans-1,2-Dichloroethylene, Benzene and p-Dichlorobenzene. EPA lists 12 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 |
|---|---|---|---|---|
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
The 12 most recent 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.
Hahn Ace: frequently asked questions
Who runs Hahn Ace?
Hahn Ace (PWSID WI2461466) 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 serve?
Hahn Ace reports serving 190 people through 1 service connection in Ozaukee County, Wisconsin.
Where does Hahn Ace 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 have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2001. 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'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2001. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Hahn Ace's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Hahn Ace 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 Ozaukee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Port Washington Waterworks | Ozaukee | 12,853 | Community | Surface water |
| Cedarburg L & W Commission | Ozaukee | 12,500 | Community | Groundwater |
| Grafton Waterworks | Ozaukee | 12,269 | Community | Groundwater |
| Mequon Water Utility | Ozaukee | 11,152 | Community | Purchased surface water |
| Saukville Waterworks | Ozaukee | 4,268 | Community | Groundwater |
| Belgium Waterworks | Ozaukee | 2,493 | 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, PWSID WI2461466, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/hahn-ace-wi2461466 (data as of October 1, 2026).