Public water system · WI2460189
ActiveThiensville Professional Park
At a glance
Thiensville Professional Park (PWSID WI2460189) is an active non-transient non-community water system in Ozaukee County, Wisconsin. It reports serving 90 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
90
Service connections
4
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Thiensville Professional Park compare with other water systems in Ozaukee County?
By EPA's size categories, Thiensville Professional Park is a very small system (500 people or fewer). Ozaukee County has 249 active public water systems. Its population served is well below the county average of 371 people per system, and accounts for less than 0.1% 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 non-transient non-community water system reports serving 430 people, so Thiensville Professional Park 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 Thiensville Professional Park?
EPA lists Thiensville Professional Park 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 Thiensville Professional Park have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1994. The violations listed here began between October 1993 and October 1994. By type: 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 1 as resolved and 1 as archived. 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. 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 |
|---|---|---|---|---|
| 1994-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 2 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.
Thiensville Professional Park: frequently asked questions
Who runs Thiensville Professional Park?
Thiensville Professional Park (PWSID WI2460189) is a non-transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Thiensville Professional Park serve?
Thiensville Professional Park reports serving 90 people through 4 service connections in Ozaukee County, Wisconsin.
Where does Thiensville Professional Park 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 Thiensville Professional Park have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1994. 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 Thiensville Professional Park'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 2 violations for this system; all are health-based, and the most recent began in October 1994. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Thiensville Professional Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Thiensville Professional Park 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 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, “Thiensville Professional Park, PWSID WI2460189, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/thiensville-professional-park-wi2460189 (data as of October 1, 2026).