Public water system · MI2070063
ActiveMt. Holly Ski
At a glance
Mt. Holly Ski (PWSID MI2070063) is an active transient non-community water system in Oakland County, Michigan. It reports serving 300 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mt. Holly Ski compare with other water systems in Oakland County?
By EPA's size categories, Mt. Holly Ski is a very small system (500 people or fewer). Oakland County has 734 active public water systems. Its population served is well below the county average of 1,561 people per system, and accounts for less than 0.1% of the 1,145,905 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 Mt. Holly Ski 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 Mt. Holly Ski?
EPA lists Mt. Holly Ski as privately owned. The MI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 638 of the 734 active systems in Oakland County (87%) are also privately owned.
Does Mt. Holly Ski have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2023. The violations listed here began between January 1995 and July 2023. By type: 5 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Nitrate (3 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2023-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1997-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 6 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.
Mt. Holly Ski: frequently asked questions
Who runs Mt. Holly Ski?
Mt. Holly Ski (PWSID MI2070063) is a transient non-community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Mt. Holly Ski serve?
Mt. Holly Ski reports serving 300 people through 1 service connection in Oakland County, Michigan.
Where does Mt. Holly Ski 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 Mt. Holly Ski have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2023. 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 Mt. Holly Ski'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. EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2023. For current results, consult EPA ECHO, or the MI state drinking water program.
Where can I find Mt. Holly Ski's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mt. Holly Ski 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 Oakland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Troy | Oakland | 85,854 | Community | Purchased surface water |
| Rochester Hills | Oakland | 74,000 | Community | Purchased surface water |
| Waterford Township | Oakland | 73,441 | Community | Groundwater |
| Southfield | Oakland | 71,739 | Community | Purchased surface water |
| Pontiac | Oakland | 63,776 | Community | Purchased surface water |
| Royal Oak, City of | Oakland | 57,236 | Community | Purchased surface water |
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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, “Mt. Holly Ski, PWSID MI2070063, Michigan”, https://aquacensus.com/water-systems/michigan/mt-holly-ski-mi2070063 (data as of October 1, 2026).