Public water system · WI6490435
ActiveCounty Line
At a glance
County Line (PWSID WI6490435) is an active transient non-community water system in Polk County, Wisconsin. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in August 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does County Line compare with other water systems in Polk County?
By EPA's size categories, County Line is a very small system (500 people or fewer). Polk County has 187 active public water systems. Its population served is well below the county average of 121 people per system, and accounts for 0.1% of the 22,690 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 County Line is well 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 County Line?
EPA lists County Line 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. 163 of the 187 active systems in Polk County (87%) are also privately owned.
Does County Line have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in August 2022. The violations listed here began between January 1997 and August 2022. By type: 3 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Nitrate (2 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2022-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, E. coli (RTCR) · code 1A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 4 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.
County Line: frequently asked questions
Who runs County Line?
County Line (PWSID WI6490435) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does County Line serve?
County Line reports serving 25 people through 1 service connection in Polk County, Wisconsin.
Where does County Line 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 County Line have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in August 2022. 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 County Line'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 4 violations for this system; 1 is health-based, and the most recent began in August 2022. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find County Line's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. County Line 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 Polk County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Amery Waterworks | Polk | 2,962 | Community | Groundwater |
| Osceola Waterworks | Polk | 2,680 | Community | Groundwater |
| St Croix Falls Waterworks | Polk | 2,079 | Community | Groundwater |
| Frederic Waterworks | Polk | 1,241 | Community | Groundwater |
| Luck Waterworks | Polk | 1,150 | Community | Groundwater |
| Clear Lake Waterworks | Polk | 1,061 | 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, “County Line, PWSID WI6490435, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/county-line-wi6490435 (data as of October 1, 2026).