Public water system · WI4240248
ActiveNational Exchange Bank
At a glance
National Exchange Bank (PWSID WI4240248) is an active transient non-community water system in Green Lake County, Wisconsin. It reports serving 59 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 September 2002.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
59
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does National Exchange Bank compare with other water systems in Green Lake County?
By EPA's size categories, National Exchange Bank is a very small system (500 people or fewer). Green Lake County has 70 active public water systems. Its population served is well below the county average of 211 people per system, and accounts for 0.4% 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 National Exchange Bank is about 59% 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 National Exchange Bank?
EPA lists National Exchange Bank 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 National Exchange Bank have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in September 2002. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. 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 |
|---|---|---|---|---|
| 2002-09-26 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | 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.
National Exchange Bank: frequently asked questions
Who runs National Exchange Bank?
National Exchange Bank (PWSID WI4240248) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does National Exchange Bank serve?
National Exchange Bank reports serving 59 people through 1 service connection in Green Lake County, Wisconsin.
Where does National Exchange Bank 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 National Exchange Bank 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 September 2002. 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 National Exchange Bank'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 September 2002. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find National Exchange Bank's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. National Exchange Bank 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 |
| All Saints Catholic Parish | Green Lake | 302 | Non-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, “National Exchange Bank, PWSID WI4240248, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/national-exchange-bank-wi4240248 (data as of October 1, 2026).