Public water system · MI0004020
ActiveManchester
At a glance
Manchester (PWSID MI0004020) is an active community water system in Washtenaw County, Michigan. It reports serving 2,150 people through 778 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; all are health-based, and the most recent began in January 1996.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,150
Service connections
778
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Manchester compare with other water systems in Washtenaw County?
By EPA's size categories, Manchester is a small system (501 to 3,300 people). Washtenaw County has 262 active public water systems. Its population served is about 88% above the county average of 1,147 people per system, and accounts for 0.7% of the 300,406 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 Manchester 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 Manchester?
EPA lists Manchester 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. 16 of the 262 active systems in Washtenaw County (6.1%) are also owned by a local government.
Does Manchester have drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in January 1996. The violations listed here began between January 1991 and January 1996. By type: 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 2 as archived and 1 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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 |
|---|---|---|---|---|
| 1996-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1991-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
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.
Manchester: frequently asked questions
Who runs Manchester?
Manchester (PWSID MI0004020) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Manchester serve?
Manchester reports serving 2,150 people through 778 service connections in Washtenaw County, Michigan.
Where does Manchester 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 Manchester have any drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in January 1996. 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 Manchester'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; all are health-based, and the most recent began in January 1996. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Manchester's water quality report?
As a community water system, Manchester 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 Washtenaw County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ann Arbor | Washtenaw | 123,851 | Community | Surface water |
| Ypsilanti Community Utility Authority | Washtenaw | 53,988 | Community | Purchased surface water |
| Pittsfield Township | Washtenaw | 24,500 | Community | Purchased surface water |
| Saline | Washtenaw | 9,158 | Community | Groundwater |
| Scio Township | Washtenaw | 8,500 | Community | Purchased surface water |
| Milan | Washtenaw | 7,363 | 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, “Manchester, PWSID MI0004020, Michigan”, https://aquacensus.com/water-systems/michigan/manchester-mi0004020 (data as of October 1, 2026).