Public water system · WI4190087
ActiveKeyes Lake Mobile Home Park
At a glance
Keyes Lake Mobile Home Park (PWSID WI4190087) is an active community water system in Florence County, Wisconsin. It reports serving 30 people through 15 service connections. 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 July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
30
Service connections
15
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Keyes Lake Mobile Home Park compare with other water systems in Florence County?
By EPA's size categories, Keyes Lake Mobile Home Park is a very small system (500 people or fewer). Florence County has 45 active public water systems. Its population served is about half of the county average of 62 people per system, and accounts for 1.1% of the 2,791 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active community water system reports serving 6,703 people, so Keyes Lake Mobile Home Park is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Wisconsin has 1,053 active community water systems, 9.5% 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 Keyes Lake Mobile Home Park?
EPA lists Keyes Lake Mobile Home Park 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. 35 of the 45 active systems in Florence County (78%) are also privately owned.
Does Keyes Lake Mobile Home Park have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in July 2025. The violations listed here began between September 2022 and July 2025. By type: 6 monitoring and reporting, 3 required treatment not met, 2 public notice, recordkeeping or other and 1 reporting. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 8 as resolved and 4 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2025-06-28 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-06-28 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-05-01 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2025-05-01 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2025-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2024-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2024-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2024-06-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2023-10-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2022-10-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2022-09-17 | 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.
Keyes Lake Mobile Home Park: frequently asked questions
Who runs Keyes Lake Mobile Home Park?
Keyes Lake Mobile Home Park (PWSID WI4190087) is a community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Keyes Lake Mobile Home Park serve?
Keyes Lake Mobile Home Park reports serving 30 people through 15 service connections in Florence County, Wisconsin.
Where does Keyes Lake Mobile Home Park 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 Keyes Lake Mobile Home Park 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 July 2025. 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 Keyes Lake Mobile Home Park'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 July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Keyes Lake Mobile Home Park's water quality report?
As a community water system, Keyes Lake Mobile Home Park must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Florence County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Florence Utility Commission | Florence | 1,250 | Community | Groundwater |
| Villas Lakeside Market | Florence | 110 | Transient non-community | Groundwater |
| Stephenson Co-Op | Florence | 100 | Transient non-community | Groundwater |
| Ashs | Florence | 75 | Transient non-community | Groundwater |
| T and T Steakhouse | Florence | 50 | Transient non-community | Groundwater |
| Big Foots Liquor | Florence | 50 | 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, “Keyes Lake Mobile Home Park, PWSID WI4190087, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/keyes-lake-mobile-home-park-wi4190087 (data as of October 1, 2026).