Greenwich, Connecticut: water and wastewater capital improvement projects
12 line items · $277M · starting 2026–2030 · 1 plan
Greenwich's published capital plans list 12 water, sewer and wastewater line items with a combined planning budget of $277M, of which 12 items worth $277M sit in the wastewater and sewer departments. The largest single item is Grass Island Wastewater Treatment Plant - Asset Management at $119M (2025–2040). 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 Greenwich
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Grass Island Wastewater Treatment Plant - Asset Management | Sewer | Wastewater treatment plant upgrades | $119M | 2025–2040 |
| 2 | Sewer Rehab | Sewer | Sewer rehabilitation and I&I | $64M | 2026–2040 |
| 3 | OG Pump Station | Sewer | Pump stations | $32M | 2025–2030 |
| 4 | Pump Station Rehabilitation | Sewer | Pump stations | $23M | 2030–2040 |
| 5 | Chapel Lane Pump Station | Sewer | Pump stations | $15M | 2028–2030 |
| 6 | Phase 1 & 2 SSES Private Inflow Removal | Sewer | Sewer rehabilitation and I&I | $8M | 2026–2040 |
| 7 | Sewer Maintenance | Sewer | Sewer rehabilitation and I&I | $7M | 2025–2040 |
| 8 | Pump Panel Upgrades/Pump Replacement | Sewer | Pump stations | $3M | 2026–2032 |
| 9 | Bond / BAN Acquisition & Interest | Sewer | — | $3M | 2025–2040 |
| 10 | Cos Cob Pump Station Upgrade | Sewer | Pump stations | $2M | 2025–2028 |
2 more line items in Greenwich, with descriptions and contacts
Klarifi holds every Greenwich line item with its description, the page it appears on and the source document, plus 1 verified contact 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
$163M
6 items
2026
$76M
4 items
2028
$15M
1 items
2030
$23M
1 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Sewer | 12 | $277M | 100% |
Project types in Greenwich's plan
Wastewater treatment plants in Greenwich
1 publicly owned treatment plant in Greenwich with 5 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Greenwich WPCF | 5.4 | CT0100234 | 5 |
Other Connecticut cities with capital plans
Greenwich capital plan questions
Sources and methodology
Budgets and years are as published in Greenwich’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 2025–2040 (12 line items).
Data refreshed September 11, 2026.