Ann Arbor, Michigan: water and wastewater capital improvement projects
151 line items · $503M · starting 2026–2031 · 1 plan
Ann Arbor's published capital plans list 151 water, sewer and wastewater line items with a combined planning budget of $503M, of which 53 items worth $111M sit in the wastewater and sewer departments. The largest single item is WTP: Plant 1 Replacement Project at $142M (2025–2031). The ten largest items are listed below; the full list with descriptions and page references is in Klarifi.
A capital improvement plan (CIP) is a city’s multi-year budget for building and replacing infrastructure. The water, sewer and wastewater sections list each project with its budget and the years it is funded, which makes them the earliest public signal that a plant, pump station or pipe network is about to be upgraded, usually two to four years before a contract is awarded.
The largest water and sewer projects in Ann Arbor
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | WTP: Plant 1 Replacement Project | Water Supply | Water treatment plants | $142M | 2025–2031 |
| 2 | High Level Trunkline Sewer Capacity Improvements | Sewer | Sewer rehabilitation and I&I | $21M | 2025–2027 |
| 3 | Dams: Barton Dam Embankment Rehabilitation | Water Distribution | — | $13M | 2025–2027 |
| 4 | WTP: Plant 2 Readiness | Water Supply | Water treatment plants | $9M | 2028–2030 |
| 5 | Galvanized Water Services Replacements | Water Distribution | — | $9M | 2025–2029 |
| 6 | Dams: Barton Dam Concrete Repairs - Phase II | Water Distribution | — | $9M | 2025–2030 |
| 7 | Pittsfield Village Water Main Improvements | Water Distribution | Water mains and distribution | $8M | 2025–2027 |
| 8 | Dams: Barton Dam Gate Replacement | Water Distribution | — | $8M | 2025–2032 |
| 9 | WRRF: Access Bridge Replacement | Wastewater | Wastewater treatment plant upgrades | $8M | 2025–2029 |
| 10 | Bunker Hill, Georgetown, Prairie, Sheffield, Aurora Water Main Replacement | Water Distribution | Water mains and distribution | $6M | 2027–2029 |
141 more line items in Ann Arbor, with descriptions and contacts
Klarifi holds every Ann Arbor line item with its description, the page it appears on and the source document, plus 36 verified contacts at the city’s treatment plants. Track new plans as they are adopted and compare with similar projects in other cities.
Planned spend by start year
Before 2026
$310M
52 items
2026
$32M
23 items
2027
$59M
28 items
2028
$45M
19 items
2029
$32M
15 items
2030
$14M
6 items
2031
$6M
4 items
2032 and later
$5M
4 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 11 | $24M | 5% |
| Sewer | 42 | $87M | 17% |
| Water Supply | 15 | $171M | 34% |
| Water Distribution | 83 | $221M | 44% |
Project types in Ann Arbor's plan
Wastewater treatment plants in Ann Arbor
1 publicly owned treatment plant in Ann Arbor with 9 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Ann Arbor WWTP | 13.6 | MI0022217 | 9 |
Other Michigan cities with capital plans
Ann Arbor capital plan questions
Sources and methodology
Budgets and years are as published in Ann Arbor’s capital improvement plan or adopted budget. Klarifi extracts the water, sewer and wastewater line items from the published document, keeps the page reference for each one, and assigns a project type from the title and description with a keyword classifier. Figures are planning budgets, not awarded contracts, and can change when a plan is re-adopted.
Documents: CIP 2026–2031 (151 line items).
Data refreshed September 11, 2026.