Public water system · MI0004006
ActiveMadison Township
At a glance
Madison Township (PWSID MI0004006) is an active community water system in Lenawee County, Michigan. It reports serving 3,480 people through 1,160 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,480
Service connections
1,160
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Madison Township compare with other water systems in Lenawee County?
By EPA's size categories, Madison Township is a medium system (3,301 to 10,000 people). Lenawee County has 182 active public water systems, and Madison Township is the 4th-largest of them by population served. Its population served is about 8 times the county average of 437 people per system, and accounts for 4.4% 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 Madison Township is about half of 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 Madison Township?
EPA lists Madison Township 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 Madison Township have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in November 2025. The violations listed here began between January 2005 and November 2025. By type: 3 monitoring and reporting. The contaminant or rule involved most often is E. coli (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2025-11-07 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2019-07-10 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
All 3 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.
Madison Township: frequently asked questions
Who runs Madison Township?
Madison Township (PWSID MI0004006) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Madison Township serve?
Madison Township reports serving 3,480 people through 1,160 service connections in Lenawee County, Michigan.
Where does Madison Township 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 Madison Township have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in November 2025. 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 Madison Township'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 3 violations for this system; none is health-based, and the most recent began in November 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Madison Township's water quality report?
As a community water system, Madison Township 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 |
| Blissfield | Lenawee | 3,276 | Community | Surface water |
| Clinton | Lenawee | 2,336 | Community | Groundwater |
| Hudson | Lenawee | 2,307 | 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, “Madison Township, PWSID MI0004006, Michigan”, https://aquacensus.com/water-systems/michigan/madison-township-mi0004006 (data as of October 1, 2026).