Public water system · WI1541560
ActiveRock Prairie Dairy
At a glance
Rock Prairie Dairy (PWSID WI1541560) is an active non-transient non-community water system in Rock County, Wisconsin. It reports serving 50 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Rock Prairie Dairy compare with other water systems in Rock County?
By EPA's size categories, Rock Prairie Dairy is a very small system (500 people or fewer). Rock County has 156 active public water systems. Its population served is well below the county average of 952 people per system, and accounts for less than 0.1% of the 148,563 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 Rock Prairie Dairy 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 Rock Prairie Dairy?
EPA lists Rock Prairie Dairy 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. 126 of the 156 active systems in Rock County (81%) are also privately owned.
Does Rock Prairie Dairy have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Rock Prairie Dairy. For the latest compliance status, check EPA ECHO for current compliance history.
Rock Prairie Dairy: frequently asked questions
Who runs Rock Prairie Dairy?
Rock Prairie Dairy (PWSID WI1541560) is a non-transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Rock Prairie Dairy serve?
Rock Prairie Dairy reports serving 50 people through 1 service connection in Rock County, Wisconsin.
Where does Rock Prairie Dairy 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 Rock Prairie Dairy have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Rock Prairie Dairy'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Rock Prairie Dairy's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Rock Prairie Dairy 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 Rock County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Janesville Water Utility | Rock | 64,415 | Community | Groundwater |
| Beloit City of | Rock | 36,677 | Community | Groundwater |
| Evansville Waterworks | Rock | 5,703 | Community | Groundwater |
| Milton Waterworks | Rock | 5,588 | Community | Groundwater |
| Edgerton Waterworks | Rock | 5,512 | Community | Groundwater |
| Wi Dot Rest Area 22 Turtle | Rock | 3,005 | Transient non-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, “Rock Prairie Dairy, PWSID WI1541560, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/rock-prairie-dairy-wi1541560 (data as of October 1, 2026).