Public water system · WI8160154
ActiveWi Dnr Pattison Reservoir
At a glance
Wi Dnr Pattison Reservoir (PWSID WI8160154) is an active transient non-community water system in Douglas County, Wisconsin. It reports serving 25 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, none is health-based, and the most recent began in October 2017.
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 Wi Dnr Pattison Reservoir compare with other water systems in Douglas County?
By EPA's size categories, Wi Dnr Pattison Reservoir is a very small system (500 people or fewer). Douglas County has 188 active public water systems. Its population served is well below the county average of 184 people per system, and accounts for less than 0.1% of the 34,606 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 Pattison Reservoir 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 Pattison Reservoir?
EPA lists Wi Dnr Pattison Reservoir 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. 14 of the 188 active systems in Douglas County (7.4%) are also owned by a state government.
Does Wi Dnr Pattison Reservoir have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2017. The violations listed here began between January 2008 and October 2017. By type: 6 monitoring and reporting, 3 monitoring and 3 public notice, recordkeeping or other. The contaminant or rule involved most often is Revised Total Coliform Rule (3 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 |
|---|---|---|---|---|
| 2017-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2015-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2010-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2008-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | 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 Pattison Reservoir: frequently asked questions
Who runs Wi Dnr Pattison Reservoir?
Wi Dnr Pattison Reservoir (PWSID WI8160154) 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 Pattison Reservoir serve?
Wi Dnr Pattison Reservoir reports serving 25 people through 1 service connection in Douglas County, Wisconsin.
Where does Wi Dnr Pattison Reservoir 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 Pattison Reservoir have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2017. 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 Pattison Reservoir'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, none is health-based, and the most recent began in October 2017. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Wi Dnr Pattison Reservoir's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wi Dnr Pattison Reservoir 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 Douglas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Superior Water Light & Power Company | Douglas | 26,084 | Community | Surface water |
| Northwestern Elementary and Middle School | Douglas | 890 | Non-transient non-community | Groundwater |
| Northwestern High School | Douglas | 448 | Non-transient non-community | Groundwater |
| Solon Springs School | Douglas | 375 | Non-transient non-community | Groundwater |
| Four Corners Elementary School | Douglas | 300 | Non-transient non-community | Groundwater |
| Parkland Town Hall | Douglas | 230 | 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, “Wi Dnr Pattison Reservoir, PWSID WI8160154, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/wi-dnr-pattison-reservoir-wi8160154 (data as of October 1, 2026).