Public water system · WI2680632

Active

Old World Wisconsin Clausing Barn W1

At a glance

Old World Wisconsin Clausing Barn W1 (PWSID WI2680632) is an active transient non-community water system in Waukesha County, Wisconsin. It reports serving 312 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, 2 are health-based, and the most recent began in November 2020.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

312

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDWI2680632

System typeTransient non-community water system

Activity statusActive

Population served312

Service connections1

Primary water sourceGroundwater

Owner typeState government

Primacy agencyWI state drinking water program

City servedEagle

StateWisconsin

ZIP—

CountyWaukesha County

How does Old World Wisconsin Clausing Barn W1 compare with other water systems in Waukesha County?

By EPA's size categories, Old World Wisconsin Clausing Barn W1 is a very small system (500 people or fewer). Waukesha County has 589 active public water systems. Its population served is about 43% below the county average of 549 people per system, and accounts for less than 0.1% of the 323,265 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 Old World Wisconsin Clausing Barn W1 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 Old World Wisconsin Clausing Barn W1?

EPA lists Old World Wisconsin Clausing Barn W1 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. 35 of the 589 active systems in Waukesha County (5.9%) are also owned by a state government.

Does Old World Wisconsin Clausing Barn W1 have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2020. The violations listed here began between July 2000 and November 2020. By type: 5 monitoring and reporting, 3 public notice, recordkeeping or other, 1 required treatment not met, 1 reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 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
2020-11-29	Required treatment not metFailure To Address Deficiency · code 45	Groundwater Rulecode 0700	Yes	Resolved
2020-10-30	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2019-12-01	ReportingNotify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR) · code 4F	Revised Total Coliform Rulecode 8000	No	Resolved
2019-12-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2017-01-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2013-04-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2011-09-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2007-06-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2007-04-25	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2007-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2006-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2000-07-01	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.

Old World Wisconsin Clausing Barn W1: frequently asked questions

Who runs Old World Wisconsin Clausing Barn W1?

Old World Wisconsin Clausing Barn W1 (PWSID WI2680632) 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 Old World Wisconsin Clausing Barn W1 serve?

Old World Wisconsin Clausing Barn W1 reports serving 312 people through 1 service connection in Waukesha County, Wisconsin.

Where does Old World Wisconsin Clausing Barn W1 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 Old World Wisconsin Clausing Barn W1 have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2020. 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 Old World Wisconsin Clausing Barn W1'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, 2 are health-based, and the most recent began in November 2020. For current results, consult EPA ECHO, or the WI state drinking water program.

Where can I find Old World Wisconsin Clausing Barn W1's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Old World Wisconsin Clausing Barn W1 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 Waukesha County

Water system	County	Population served	Type	Source
Waukesha Water Utility	Waukesha	70,718	Community	Purchased surface water
Brookfield Water Utility	Waukesha	29,070	Community	Groundwater
New Berlin Water Utility	Waukesha	27,899	Community	Purchased surface water
Menomonee Falls Ww - Surface Water	Waukesha	23,867	Community	Purchased surface water
Oconomowoc Waterworks	Waukesha	15,805	Community	Groundwater
Sussex Village Hall & Water Utility	Waukesha	11,750	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, “Old World Wisconsin Clausing Barn W1, PWSID WI2680632, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/old-world-wisconsin-clausing-barn-w1-wi2680632 (data as of October 1, 2026).