Public water system · WI1330092
ActiveWi Dnr Yellowstone Below Dam
At a glance
Wi Dnr Yellowstone Below Dam (PWSID WI1330092) is an active transient non-community water system in Lafayette County, Wisconsin. It reports serving 30 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in August 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
30
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Wi Dnr Yellowstone Below Dam compare with other water systems in Lafayette County?
By EPA's size categories, Wi Dnr Yellowstone Below Dam is a very small system (500 people or fewer). Lafayette County has 39 active public water systems. Its population served is well below the county average of 284 people per system, and accounts for 0.3% of the 11,066 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 Wi Dnr Yellowstone Below Dam 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 Wi Dnr Yellowstone Below Dam?
EPA lists Wi Dnr Yellowstone Below Dam as owned by a state government. 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. 7 of the 39 active systems in Lafayette County (18%) are also owned by a state government.
Does Wi Dnr Yellowstone Below Dam have drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in August 2024. The violations listed here began between October 1998 and August 2024. By type: 5 monitoring, 3 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (5 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2024-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1998-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 9 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.
Wi Dnr Yellowstone Below Dam: frequently asked questions
Who runs Wi Dnr Yellowstone Below Dam?
Wi Dnr Yellowstone Below Dam (PWSID WI1330092) is a transient non-community water system owned by a state government. It is regulated by the WI state drinking water program.
How many people does Wi Dnr Yellowstone Below Dam serve?
Wi Dnr Yellowstone Below Dam reports serving 30 people through 1 service connection in Lafayette County, Wisconsin.
Where does Wi Dnr Yellowstone Below Dam 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 Wi Dnr Yellowstone Below Dam have any drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in August 2024. 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 Wi Dnr Yellowstone Below Dam'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 9 violations for this system; 1 is health-based, and the most recent began in August 2024. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Wi Dnr Yellowstone Below Dam's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wi Dnr Yellowstone Below Dam 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 Lafayette County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Darlington Waterworks | Lafayette | 2,235 | Community | Groundwater |
| Shullsburg Waterworks | Lafayette | 1,222 | Community | Groundwater |
| Belmont Waterworks | Lafayette | 991 | Community | Groundwater |
| Benton Waterworks | Lafayette | 976 | Community | Groundwater |
| Argyle Waterworks | Lafayette | 823 | Community | Groundwater |
| Blanchardville Waterworks | Lafayette | 810 | 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, “Wi Dnr Yellowstone Below Dam, PWSID WI1330092, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/wi-dnr-yellowstone-below-dam-wi1330092 (data as of October 1, 2026).