Public water system · WI6420337
ActiveWi Dnr Mill Bluff Office
At a glance
Wi Dnr Mill Bluff Office (PWSID WI6420337) is an active transient non-community water system in Monroe County, Wisconsin. It reports serving 125 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in June 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
125
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Wi Dnr Mill Bluff Office compare with other water systems in Monroe County?
By EPA's size categories, Wi Dnr Mill Bluff Office is a very small system (500 people or fewer). Monroe County has 102 active public water systems. Its population served is well below the county average of 385 people per system, and accounts for 0.3% of the 39,274 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 Mill Bluff Office is about 13% 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 Mill Bluff Office?
EPA lists Wi Dnr Mill Bluff Office 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. 10 of the 102 active systems in Monroe County (9.8%) are also owned by a state government.
Does Wi Dnr Mill Bluff Office have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in June 2023. The violations listed here began between April 1998 and June 2023. By type: 6 monitoring and reporting, 5 contaminant level above the legal limit and 1 reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2023-06-24 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2004-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1999-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
The 12 most recent 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 Mill Bluff Office: frequently asked questions
Who runs Wi Dnr Mill Bluff Office?
Wi Dnr Mill Bluff Office (PWSID WI6420337) 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 Mill Bluff Office serve?
Wi Dnr Mill Bluff Office reports serving 125 people through 1 service connection in Monroe County, Wisconsin.
Where does Wi Dnr Mill Bluff Office 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 Mill Bluff Office have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in June 2023. 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 Mill Bluff Office'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. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in June 2023. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Wi Dnr Mill Bluff Office's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wi Dnr Mill Bluff Office 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 Monroe County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sparta Waterworks | Monroe | 10,025 | Community | Groundwater |
| Fort Mccoy North Post | Monroe | 10,000 | Community | Groundwater |
| Tomah Waterworks | Monroe | 9,192 | Community | Groundwater |
| Cashton Waterworks | Monroe | 1,120 | Community | Groundwater |
| Brookwood High School | Monroe | 700 | Non-transient non-community | Groundwater |
| Norwalk Waterworks | Monroe | 653 | 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 Mill Bluff Office, PWSID WI6420337, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/wi-dnr-mill-bluff-office-wi6420337 (data as of October 1, 2026).