Public water system · MI0040363
ActiveTimberline Estates
At a glance
Timberline Estates (PWSID MI0040363) is an active community water system in Muskegon County, Michigan. It reports serving 755 people through 302 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in September 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
755
Service connections
302
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Timberline Estates compare with other water systems in Muskegon County?
By EPA's size categories, Timberline Estates is a small system (501 to 3,300 people). Muskegon County has 210 active public water systems. Its population served is roughly in line with the county average of 713 people per system, and accounts for 0.5% of the 149,690 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 Timberline Estates 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 Timberline Estates?
EPA lists Timberline Estates 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. 193 of the 210 active systems in Muskegon County (92%) are also privately owned.
Does Timberline Estates have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in September 2019. The violations listed here began between January 1999 and September 2019. By type: 4 monitoring and reporting, 2 contaminant level above the legal limit and 1 reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2019-09-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2011-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2004-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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.
Timberline Estates: frequently asked questions
Who runs Timberline Estates?
Timberline Estates (PWSID MI0040363) is a community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Timberline Estates serve?
Timberline Estates reports serving 755 people through 302 service connections in Muskegon County, Michigan.
Where does Timberline Estates 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 Timberline Estates have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in September 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 Timberline Estates' 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 7 violations for this system; 2 are health-based, and the most recent began in September 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 Timberline Estates' water quality report?
As a community water system, Timberline Estates 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 Muskegon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Muskegon | Muskegon | 37,213 | Community | Surface water |
| Norton Shores | Muskegon | 23,994 | Community | Purchased surface water |
| Muskegon Heights | Muskegon | 9,917 | Community | Surface water |
| Fruitport Township | Muskegon | 9,355 | Community | Purchased surface water |
| Muskegon Co Eastside Water System | Muskegon | 7,135 | Community | Purchased surface water |
| Musk Co Northside Water System | Muskegon | 5,133 | 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, “Timberline Estates, PWSID MI0040363, Michigan”, https://aquacensus.com/water-systems/michigan/timberline-estates-mi0040363 (data as of October 1, 2026).