Public water system · WI2460998
ActiveMcdonalds Mequon
At a glance
Mcdonalds Mequon (PWSID WI2460998) is an active transient non-community water system in Ozaukee County, Wisconsin. It reports serving 1,524 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, 2 are health-based, and the most recent began in January 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,524
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mcdonalds Mequon compare with other water systems in Ozaukee County?
By EPA's size categories, Mcdonalds Mequon is a small system (501 to 3,300 people). Ozaukee County has 249 active public water systems. Its population served is about 4.1 times the county average of 371 people per system, and accounts for 1.6% of the 92,392 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 Mcdonalds Mequon is about 11 times 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 Mcdonalds Mequon?
EPA lists Mcdonalds Mequon 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. 218 of the 249 active systems in Ozaukee County (88%) are also privately owned.
Does Mcdonalds Mequon have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2017. The violations listed here began between June 2004 and January 2017. By type: 5 public notice, recordkeeping or other, 4 monitoring and reporting, 1 reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 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 |
|---|---|---|---|---|
| 2017-01-12 | ReportingReporting, Assessment Forms (RTCR) · code 4A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-01-12 | Required treatment not metTreatment Technique, Level 2 Assessment (RTCR) · code 2B | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2006-02-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2006-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2005-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-03-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2005-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2004-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-06-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | 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 Mequon: frequently asked questions
Who runs Mcdonalds Mequon?
Mcdonalds Mequon (PWSID WI2460998) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Mcdonalds Mequon serve?
Mcdonalds Mequon reports serving 1,524 people through 1 service connection in Ozaukee County, Wisconsin.
Where does Mcdonalds Mequon 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 Mequon 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 January 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 Mcdonalds Mequon'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 January 2017. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Mcdonalds Mequon's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mcdonalds Mequon 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 Ozaukee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Port Washington Waterworks | Ozaukee | 12,853 | Community | Surface water |
| Cedarburg L & W Commission | Ozaukee | 12,500 | Community | Groundwater |
| Grafton Waterworks | Ozaukee | 12,269 | Community | Groundwater |
| Mequon Water Utility | Ozaukee | 11,152 | Community | Purchased surface water |
| Saukville Waterworks | Ozaukee | 4,268 | Community | Groundwater |
| Belgium Waterworks | Ozaukee | 2,493 | 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 Mequon, PWSID WI2460998, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/mcdonalds-mequon-wi2460998 (data as of October 1, 2026).