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Transient Non-Community Water System · PWS WI2680632

Old World Wisconsin Clausing Barn W1

Eagle, Wisconsin 53119 - drinking water served from groundwater sources to 312 people, tracked in EPA SDWIS and UCMR5.

312
People served
50
EPA violations
10
Health-based
Untested
UCMR5 result

The verdict

EPA records 50 drinking-water violations at Old World Wisconsin Clausing Barn W1, 20% of them health-based - above the Wisconsin per-system average.

50
Total EPA violations on record
20%
Health-based (MCL / treatment failure)
312
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Old World Wisconsin Clausing Barn W1

Old World Wisconsin Clausing Barn W1 is a state-owned transient non-community water system that delivers drinking water to 312 residents in Eagle, Wisconsin (Waukesha County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 50 total violations for this system , of which 10 (20%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 30 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 24 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. Statewide, 51 of 202 UCMR5-tested systems have reported PFAS detections (25.2%).

Old World Wisconsin Clausing Barn W1's 50 violations sit above the Wisconsin average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
312
Total Violations
50
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
State
Connections
1
County
Waukesha
School/Daycare
No
MCL Violations
6
Monitoring Violations
30
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 24 2013
Coliform (TCR) MCL 6 2007
Public Notice Other 6 2020
Revised Total Coliform Rule MON 5 2017
Groundwater Rule TT 4 2020
Revised Total Coliform Rule RPT 4 2019
Nitrate MR 1 1999

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Old World Wisconsin Clausing Barn W1.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WI2680632 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR, Drinking Water and Groundwater is the primacy agency that licenses and inspects Old World Wisconsin Clausing Barn W1 under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR, Drinking Water and Groundwater

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2020 Public Notice Other 6 SDWIS / WI2680632 / 7500
2020 Groundwater Rule TT 4 SDWIS / WI2680632 / 0700
2019 Revised Total Coliform Rule RPT 4 SDWIS / WI2680632 / 8000
2017 Revised Total Coliform Rule MON 5 SDWIS / WI2680632 / 8000
2013 Coliform (TCR) MR 24 SDWIS / WI2680632 / 3100
2007 Coliform (TCR) MCL 6 SDWIS / WI2680632 / 3100
1999 Nitrate MR 1 SDWIS / WI2680632 / 1040

How Old World Wisconsin Clausing Barn W1 Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Old World Wisconsin Clausing Barn W1 Wisconsin avg Federal benchmark
Total violations 50 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 10 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 25.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 312 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Old World Wisconsin Clausing Barn W1 water safe to drink? ▼
Old World Wisconsin Clausing Barn W1 (PWS ID: WI2680632) has 50 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 312 people using Groundwater sources.
How many people does Old World Wisconsin Clausing Barn W1 serve? ▼
Old World Wisconsin Clausing Barn W1 serves 312 people in Eagle, Wisconsin. It is a State-owned system using Groundwater water sources with 1 service connections.
What type of violations does Old World Wisconsin Clausing Barn W1 have? ▼
Old World Wisconsin Clausing Barn W1 has 50 total violations: 10 health-based violations (MCL exceedances or treatment failures), 30 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Old World Wisconsin Clausing Barn W1 water? ▼
No PFAS testing data is available for Old World Wisconsin Clausing Barn W1 under the EPA's UCMR5 monitoring program.
What water source does Old World Wisconsin Clausing Barn W1 use? ▼
Old World Wisconsin Clausing Barn W1 uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.