Public water system · PA6430849
ActiveCozy Oaks Rv Resort
At a glance
Cozy Oaks Rv Resort (PWSID PA6430849) is an active transient non-community water system in Mercer County, Michigan. It reports serving 300 people through 250 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, 2 are health-based, and the most recent began in August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
250
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Cozy Oaks Rv Resort compare with other water systems in Mercer County?
By EPA's size categories, Cozy Oaks Rv Resort is a very small system (500 people or fewer). Mercer County has 2 active public water systems, and Cozy Oaks Rv Resort is the largest of them by population served. Its population served is about 64% above the county average of 183 people per system, and accounts for 82% of the 365 people reported by systems filed under the county. Across Michigan, the 10,599 active systems average 847 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Cozy Oaks Rv Resort 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. Michigan has 7,865 active transient non-community water systems, 74% of the state's 10,599 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,214 Michigan systems (96%) list groundwater as their primary source.
Who owns and regulates Cozy Oaks Rv Resort?
EPA lists Cozy Oaks Rv Resort as privately owned. The PA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 2 of the 2 active systems in Mercer County (100%) are also privately owned.
Does Cozy Oaks Rv Resort have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2025. The violations listed here began between April 2021 and August 2025. By type: 6 monitoring, 2 reporting, 2 public notice, recordkeeping or other and 2 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform Rule (10 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 |
|---|---|---|---|---|
| 2025-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-05-01 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-05-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-05-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-04-15 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2023-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-05-29 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-04-17 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | 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.
Cozy Oaks Rv Resort: frequently asked questions
Who runs Cozy Oaks Rv Resort?
Cozy Oaks Rv Resort (PWSID PA6430849) is a transient non-community water system privately owned. It is regulated by the PA state drinking water program.
How many people does Cozy Oaks Rv Resort serve?
Cozy Oaks Rv Resort reports serving 300 people through 250 service connections in Mercer County, Michigan.
Where does Cozy Oaks Rv Resort 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 Cozy Oaks Rv Resort 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 August 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 Cozy Oaks Rv Resort'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 August 2025. For current results, consult EPA ECHO, or the PA state drinking water program.
Where can I find Cozy Oaks Rv Resort's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cozy Oaks Rv Resort 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 Mercer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cozy Oaks MHP | Mercer | 65 | 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, “Cozy Oaks Rv Resort, PWSID PA6430849, Michigan”, https://aquacensus.com/water-systems/michigan/cozy-oaks-rv-resort-pa6430849 (data as of October 1, 2026).