Public water system · WI4240260
ActiveGrand Valley Cmpgd Main
At a glance
Grand Valley Cmpgd Main (PWSID WI4240260) is an active transient non-community water system in Green Lake County, Wisconsin. It reports serving 250 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 health-based, and the most recent began in January 1993.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
250
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Grand Valley Cmpgd Main compare with other water systems in Green Lake County?
By EPA's size categories, Grand Valley Cmpgd Main is a very small system (500 people or fewer). Green Lake County has 70 active public water systems. Its population served is about 18% above the county average of 211 people per system, and accounts for 1.7% of the 14,772 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 Grand Valley Cmpgd Main is about 74% 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 Grand Valley Cmpgd Main?
EPA lists Grand Valley Cmpgd Main 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. 63 of the 70 active systems in Green Lake County (90%) are also privately owned.
Does Grand Valley Cmpgd Main have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 1993. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 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 |
|---|---|---|---|---|
| 1993-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
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.
Grand Valley Cmpgd Main: frequently asked questions
Who runs Grand Valley Cmpgd Main?
Grand Valley Cmpgd Main (PWSID WI4240260) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Grand Valley Cmpgd Main serve?
Grand Valley Cmpgd Main reports serving 250 people through 1 service connection in Green Lake County, Wisconsin.
Where does Grand Valley Cmpgd Main 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 Grand Valley Cmpgd Main have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 1993. 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 Grand Valley Cmpgd Main'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 health-based, and the most recent began in January 1993. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Grand Valley Cmpgd Main's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Grand Valley Cmpgd Main 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 Green Lake County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Berlin Waterworks | Green Lake | 5,524 | Community | Groundwater |
| Markesan Waterworks | Green Lake | 1,365 | Community | Groundwater |
| Princeton Waterworks | Green Lake | 1,166 | Community | Groundwater |
| Green Lake Waterworks | Green Lake | 1,002 | Community | Groundwater |
| Amer Baptist Assem Main | Green Lake | 640 | Non-transient non-community | Groundwater |
| Walkers Bar & Grill | Green Lake | 302 | 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, “Grand Valley Cmpgd Main, PWSID WI4240260, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/grand-valley-cmpgd-main-wi4240260 (data as of October 1, 2026).