Public water system · MI0003137
ActiveHidden Lakes of Green Oaks
At a glance
Hidden Lakes of Green Oaks (PWSID MI0003137) is an active community water system in Livingston County, Michigan. It reports serving 1,148 people through 425 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,148
Service connections
425
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hidden Lakes of Green Oaks compare with other water systems in Livingston County?
By EPA's size categories, Hidden Lakes of Green Oaks is a small system (501 to 3,300 people). Livingston County has 425 active public water systems. Its population served is about 3.7 times the county average of 314 people per system, and accounts for 0.9% of the 133,320 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 Hidden Lakes of Green Oaks 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 Hidden Lakes of Green Oaks?
EPA lists Hidden Lakes of Green Oaks 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. 386 of the 425 active systems in Livingston County (91%) are also privately owned.
Does Hidden Lakes of Green Oaks have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2020. By type: 1 public notice, recordkeeping or other. The contaminant or rule involved is Consumer Confidence Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2020-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
The one violation in EPA's records.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.
Hidden Lakes of Green Oaks: frequently asked questions
Who runs Hidden Lakes of Green Oaks?
Hidden Lakes of Green Oaks (PWSID MI0003137) is a community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Hidden Lakes of Green Oaks serve?
Hidden Lakes of Green Oaks reports serving 1,148 people through 425 service connections in Livingston County, Michigan.
Where does Hidden Lakes of Green Oaks 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 Hidden Lakes of Green Oaks have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2020. 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 Hidden Lakes of Green Oaks' 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 one violation for this system; it is not health-based, and the most recent began in July 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Hidden Lakes of Green Oaks' water quality report?
As a community water system, Hidden Lakes of Green Oaks 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 Livingston County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mhog Sewer & Water Authority | Livingston | 17,046 | Community | Groundwater |
| Brighton, City of | Livingston | 10,210 | Community | Groundwater |
| Howell, City of | Livingston | 9,914 | Community | Groundwater |
| Livingston Community Water Authority | Livingston | 4,152 | Community | Groundwater |
| Hartland Township | Livingston | 3,022 | Community | Groundwater |
| Chilson Commons / Kroger | Livingston | 3,000 | Non-transient non-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, “Hidden Lakes of Green Oaks, PWSID MI0003137, Michigan”, https://aquacensus.com/water-systems/michigan/hidden-lakes-of-green-oaks-mi0003137 (data as of October 1, 2026).