Public water system · WI2410897
ActiveOn the Border
At a glance
On the Border (PWSID WI2410897) is an active transient non-community water system in Milwaukee County, Wisconsin. It reports serving 303 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; none is health-based, and the most recent began in April 2002.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
303
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does On the Border compare with other water systems in Milwaukee County?
By EPA's size categories, On the Border is a very small system (500 people or fewer). Milwaukee County has 85 active public water systems. Its population served is well below the county average of 11,209 people per system, and accounts for less than 0.1% of the 952,731 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 On the Border is about twice 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 On the Border?
EPA lists On the Border 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. 59 of the 85 active systems in Milwaukee County (69%) are also privately owned.
Does On the Border have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in April 2002. The violations listed here began between January 1995 and April 2002. By type: 8 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2002-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-03-12 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 8 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.
On the Border: frequently asked questions
Who runs On the Border?
On the Border (PWSID WI2410897) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does On the Border serve?
On the Border reports serving 303 people through 1 service connection in Milwaukee County, Wisconsin.
Where does On the Border 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 On the Border have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in April 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 On the Border'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 8 violations for this system; none is health-based, and the most recent began in April 2002. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find On the Border's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. On the Border 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 Milwaukee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Milwaukee Waterworks | Milwaukee | 626,000 | Community | Surface water |
| West Allis Waterworks | Milwaukee | 63,240 | Community | Purchased surface water |
| Wauwatosa Waterworks | Milwaukee | 49,064 | Community | Purchased surface water |
| North Shore Water Commission | Milwaukee | 35,598 | Community | Surface water |
| Oak Creek Waterworks | Milwaukee | 32,104 | Community | Surface water |
| Franklin Water Utility | Milwaukee | 22,500 | Community | Purchased surface water |
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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, “On the Border, PWSID WI2410897, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/on-the-border-wi2410897 (data as of October 1, 2026).