Public water system · MI0040399

Active

Orion Lake Estates Mhc

At a glance

Orion Lake Estates Mhc (PWSID MI0040399) is an active community water system in Oakland County, Michigan. It reports serving 1,058 people through 423 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in May 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

1,058

Service connections

423

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDMI0040399

System typeCommunity water system

Activity statusActive

Population served1,058

Service connections423

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyMI state drinking water program

City served—

StateMichigan

ZIP—

CountyOakland County

How does Orion Lake Estates Mhc compare with other water systems in Oakland County?

By EPA's size categories, Orion Lake Estates Mhc is a small system (501 to 3,300 people). Oakland County has 734 active public water systems. Its population served is about 32% 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 Orion Lake 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 Orion Lake Estates Mhc?

EPA lists Orion Lake 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 Orion Lake Estates Mhc have drinking water violations?

EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in May 2024. The violations listed here began between July 2005 and May 2024. By type: 4 public notice, recordkeeping or other, 3 reporting, 3 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (3 of them). EPA lists 11 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
2024-05-11	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2023-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2023-09-11	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2022-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2021-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2020-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2019-12-11	ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B	Revised Total Coliform Rulecode 8000	No	Resolved
2018-05-22	Public notice, recordkeeping or otherFailure to Consult with State · code 20	Groundwater Rulecode 0700	No	Resolved
2016-12-14	Monitoring and reportingMonitoring, Source Water (GWR) · code 34	E. colicode 3014	No	Resolved
2006-01-23	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Arseniccode 1005	Yes	Resolved
2005-07-01	Monitoring and reportingMonitoring, Regular · code 03	Arseniccode 1005	No	Resolved

All 11 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.

Orion Lake Estates Mhc: frequently asked questions

Who runs Orion Lake Estates Mhc?

Orion Lake Estates Mhc (PWSID MI0040399) is a community water system privately owned. It is regulated by the MI state drinking water program.

How many people does Orion Lake Estates Mhc serve?

Orion Lake Estates Mhc reports serving 1,058 people through 423 service connections in Oakland County, Michigan.

Where does Orion Lake 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 Orion Lake Estates Mhc have any drinking water violations?

EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in May 2024. 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 Orion Lake 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 11 violations for this system; 1 is health-based, and the most recent began in May 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.

Where can I find Orion Lake Estates Mhc's water quality report?

As a community water system, Orion Lake 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, “Orion Lake Estates Mhc, PWSID MI0040399, Michigan”, https://aquacensus.com/water-systems/michigan/orion-lake-estates-mhc-mi0040399 (data as of October 1, 2026).