Public water system · MI0040391
ActiveOak Hill Estates Mhc
At a glance
Oak Hill Estates Mhc (PWSID MI0040391) is an active community water system in Oakland County, Michigan. It reports serving 1,260 people through 504 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,260
Service connections
504
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Oak Hill Estates Mhc compare with other water systems in Oakland County?
By EPA's size categories, Oak Hill Estates Mhc is a small system (501 to 3,300 people). Oakland County has 734 active public water systems. Its population served is about 19% below the county average of 1,561 people per system, and accounts for 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 community water system reports serving 6,703 people, so Oak Hill Estates Mhc 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. Michigan has 1,332 active community water systems, 13% 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 Oak Hill Estates Mhc?
EPA lists Oak Hill Estates Mhc 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 Oak Hill Estates Mhc have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2019. The violations listed here began between July 2014 and October 2019. By type: 2 monitoring and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2019-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 3 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.
Oak Hill Estates Mhc: frequently asked questions
Who runs Oak Hill Estates Mhc?
Oak Hill Estates Mhc (PWSID MI0040391) is a community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Oak Hill Estates Mhc serve?
Oak Hill Estates Mhc reports serving 1,260 people through 504 service connections in Oakland County, Michigan.
Where does Oak Hill Estates Mhc 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 Oak Hill Estates Mhc have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 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 Oak Hill Estates Mhc'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 3 violations for this system; none is health-based, and the most recent began in October 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Oak Hill Estates Mhc's water quality report?
As a community water system, Oak Hill Estates Mhc 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 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, “Oak Hill Estates Mhc, PWSID MI0040391, Michigan”, https://aquacensus.com/water-systems/michigan/oak-hill-estates-mhc-mi0040391 (data as of October 1, 2026).