Public water system · MI0007260
ActiveYpsilanti Community Utility Authority
At a glance
Ypsilanti Community Utility Authority (PWSID MI0007260) is an active community water system in Washtenaw County, Michigan. It reports serving 53,988 people through 19,987 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in April 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
53,988
Service connections
19,987
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Ypsilanti Community Utility Authority compare with other water systems in Washtenaw County?
By EPA's size categories, Ypsilanti Community Utility Authority is a large system (10,001 to 100,000 people). Washtenaw County has 262 active public water systems, and Ypsilanti Community Utility Authority is the 2nd-largest of them by population served. Its population served is about 47 times the county average of 1,147 people per system, and accounts for 18% 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 Ypsilanti Community Utility Authority is about 8.1 times 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 262 Michigan systems (2.5%) list purchased surface water as their primary source.
Who owns and regulates Ypsilanti Community Utility Authority?
EPA lists Ypsilanti Community Utility Authority 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 Ypsilanti Community Utility Authority have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in April 2013. The violations listed here began between April 2013 and April 2013. By type: 2 monitoring and reporting. The contaminants or rules involved are Total trihalomethanes (TTHM) and Haloacetic acids (HAA5). EPA lists 2 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 |
|---|---|---|---|---|
| 2013-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
All 2 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.
Ypsilanti Community Utility Authority: frequently asked questions
Who runs Ypsilanti Community Utility Authority?
Ypsilanti Community Utility Authority (PWSID MI0007260) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Ypsilanti Community Utility Authority serve?
Ypsilanti Community Utility Authority reports serving 53,988 people through 19,987 service connections in Washtenaw County, Michigan.
Where does Ypsilanti Community Utility Authority get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Ypsilanti Community Utility Authority have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in April 2013. 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 Ypsilanti Community Utility Authority'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 2 violations for this system; none is health-based, and the most recent began in April 2013. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Ypsilanti Community Utility Authority's water quality report?
As a community water system, Ypsilanti Community Utility Authority 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 |
| 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 |
| Superior Township | Washtenaw | 6,830 | 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, “Ypsilanti Community Utility Authority, PWSID MI0007260, Michigan”, https://aquacensus.com/water-systems/michigan/ypsilanti-community-utility-authority-mi0007260 (data as of October 1, 2026).