Public water system · MI0070005
ActiveTrinity Health Ann Arbor
At a glance
Trinity Health Ann Arbor (PWSID MI0070005) is an active non-transient non-community water system in Washtenaw County, Michigan. It reports serving 2,500 people through 1 service connection. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,500
Service connections
1
Primary source
SWP
Purchased surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Trinity Health Ann Arbor compare with other water systems in Washtenaw County?
By EPA's size categories, Trinity Health Ann Arbor is a small system (501 to 3,300 people). Washtenaw County has 262 active public water systems. Its population served is about twice the county average of 1,147 people per system, and accounts for 0.8% 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 non-transient non-community water system reports serving 430 people, so Trinity Health Ann Arbor is about 5.8 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Michigan has 1,402 active non-transient non-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 Trinity Health Ann Arbor?
EPA lists Trinity Health Ann Arbor 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. 229 of the 262 active systems in Washtenaw County (87%) are also privately owned.
Does Trinity Health Ann Arbor have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Trinity Health Ann Arbor. For the latest compliance status, check EPA ECHO for current compliance history.
Trinity Health Ann Arbor: frequently asked questions
Who runs Trinity Health Ann Arbor?
Trinity Health Ann Arbor (PWSID MI0070005) is a non-transient non-community water system privately owned. It is regulated by the MI state drinking water program.
How many people does Trinity Health Ann Arbor serve?
Trinity Health Ann Arbor reports serving 2,500 people through 1 service connection in Washtenaw County, Michigan.
Where does Trinity Health Ann Arbor 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 Trinity Health Ann Arbor have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Trinity Health Ann Arbor'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the MI state drinking water program.
Where can I find Trinity Health Ann Arbor's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Trinity Health Ann Arbor is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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, “Trinity Health Ann Arbor, PWSID MI0070005, Michigan”, https://aquacensus.com/water-systems/michigan/trinity-health-ann-arbor-mi0070005 (data as of October 1, 2026).