Public water system · WI2682450

Active

Mcdonalds Vernon

At a glance

Mcdonalds Vernon (PWSID WI2682450) is an active non-transient non-community water system in Waukesha County, Wisconsin. It reports serving 1,250 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in March 2019.

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

Population served

1,250

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDWI2682450

System typeNon-transient non-community water system

Activity statusActive

Population served1,250

Service connections1

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyWI state drinking water program

City servedBig Bend

StateWisconsin

ZIP—

CountyWaukesha County

How does Mcdonalds Vernon compare with other water systems in Waukesha County?

By EPA's size categories, Mcdonalds Vernon is a small system (501 to 3,300 people). Waukesha County has 589 active public water systems. Its population served is about 128% above the county average of 549 people per system, and accounts for 0.4% 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 non-transient non-community water system reports serving 430 people, so Mcdonalds Vernon is about 191% above that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Wisconsin has 891 active non-transient non-community water systems, 8.1% 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 Mcdonalds Vernon?

EPA lists Mcdonalds Vernon as privately owned. 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. 452 of the 589 active systems in Waukesha County (77%) are also privately owned.

Does Mcdonalds Vernon have drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in March 2019. The violations listed here began between May 2006 and March 2019. By type: 4 monitoring and reporting, 3 contaminant level above the legal limit, 3 public notice, recordkeeping or other and 2 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 of them). EPA lists 11 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2019-03-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-02-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2014-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2013-11-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2013-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2011-12-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2011-11-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2009-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2007-03-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2007-02-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2006-06-01	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2006-05-01	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.

Mcdonalds Vernon: frequently asked questions

Who runs Mcdonalds Vernon?

Mcdonalds Vernon (PWSID WI2682450) is a non-transient non-community water system privately owned. It is regulated by the WI state drinking water program.

How many people does Mcdonalds Vernon serve?

Mcdonalds Vernon reports serving 1,250 people through 1 service connection in Waukesha County, Wisconsin.

Where does Mcdonalds Vernon 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 Mcdonalds Vernon have any drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in March 2019. 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 Mcdonalds Vernon'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, 3 are health-based, and the most recent began in March 2019. For current results, consult EPA ECHO, or the WI state drinking water program.

Where can I find Mcdonalds Vernon's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Mcdonalds Vernon is a non-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, “Mcdonalds Vernon, PWSID WI2682450, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/mcdonalds-vernon-wi2682450 (data as of October 1, 2026).