Public water system · MI0003692
ActiveLake Arrowhead Estates
At a glance
Lake Arrowhead Estates (PWSID MI0003692) is an active community water system in Lenawee County, Michigan. It reports serving 231 people through 66 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in December 1998.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
231
Service connections
66
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lake Arrowhead Estates compare with other water systems in Lenawee County?
By EPA's size categories, Lake Arrowhead Estates is a very small system (500 people or fewer). Lenawee County has 182 active public water systems. Its population served is about half of the county average of 437 people per system, and accounts for 0.3% of the 79,516 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 Lake Arrowhead 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 Lake Arrowhead Estates?
EPA lists Lake Arrowhead Estates as owned by a local government. 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. 17 of the 182 active systems in Lenawee County (9.3%) are also owned by a local government.
Does Lake Arrowhead Estates have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 1998. By type: 1 monitoring and reporting. The contaminant or rule involved is Total coliform bacteria (TCR). 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 |
|---|---|---|---|---|
| 1998-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Lake Arrowhead Estates: frequently asked questions
Who runs Lake Arrowhead Estates?
Lake Arrowhead Estates (PWSID MI0003692) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Lake Arrowhead Estates serve?
Lake Arrowhead Estates reports serving 231 people through 66 service connections in Lenawee County, Michigan.
Where does Lake Arrowhead 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 Lake Arrowhead Estates 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 December 1998. 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 Lake Arrowhead 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 one violation for this system; it is not health-based, and the most recent began in December 1998. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Lake Arrowhead Estates' water quality report?
As a community water system, Lake Arrowhead 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 Lenawee County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Adrian | Lenawee | 23,663 | Community | Surface water |
| Tecumseh | Lenawee | 8,521 | Community | Groundwater |
| The Groves of Michigan | Lenawee | 6,460 | Transient non-community | Groundwater |
| Madison Township | Lenawee | 3,480 | Community | Groundwater |
| Blissfield | Lenawee | 3,276 | Community | Surface water |
| Clinton | Lenawee | 2,336 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Lake Arrowhead Estates, PWSID MI0003692, Michigan”, https://aquacensus.com/water-systems/michigan/lake-arrowhead-estates-mi0003692 (data as of October 1, 2026).