Public water system · MI0040388
ActiveHighland Hills of Highland Mhc
At a glance
Highland Hills of Highland Mhc (PWSID MI0040388) is an active community water system in Oakland County, Michigan. It reports serving 260 people through 308 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in April 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
260
Service connections
308
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Highland Hills of Highland Mhc compare with other water systems in Oakland County?
By EPA's size categories, Highland Hills of Highland Mhc 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 community water system reports serving 6,703 people, so Highland Hills of Highland 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 Highland Hills of Highland Mhc?
EPA lists Highland Hills of Highland 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 Highland Hills of Highland Mhc have drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in April 2022. The violations listed here began between January 2006 and April 2022. By type: 5 monitoring and reporting, 2 contaminant level above the legal limit, 1 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Arsenic (3 of them). EPA lists 8 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2021-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2020-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2020-10-11 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2007-10-15 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2007-09-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2006-01-23 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
All 9 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.
Highland Hills of Highland Mhc: frequently asked questions
Who runs Highland Hills of Highland Mhc?
Highland Hills of Highland Mhc (PWSID MI0040388) is a community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Highland Hills of Highland Mhc serve?
Highland Hills of Highland Mhc reports serving 260 people through 308 service connections in Oakland County, Michigan.
Where does Highland Hills of Highland 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 Highland Hills of Highland Mhc have any drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in April 2022. 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 Highland Hills of Highland 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 9 violations for this system; 2 are health-based, and the most recent began in April 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Highland Hills of Highland Mhc's water quality report?
As a community water system, Highland Hills of Highland 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, “Highland Hills of Highland Mhc, PWSID MI0040388, Michigan”, https://aquacensus.com/water-systems/michigan/highland-hills-of-highland-mhc-mi0040388 (data as of October 1, 2026).