Connecticut water and wastewater capital improvement plans
150 planned projects · $718M · 13 cities · 13 plans
The 13 capital improvement plans and adopted budgets Klarifi has extracted for Connecticut list 150 water, sewer and wastewater line items with a combined planning budget of $718M across 13 cities. Greenwich has the largest plan at $277M. Each city page lists its largest projects with budgets and years, links the source document and the city's treatment plants.
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.
Cities in Connecticut with water and sewer capital plans
| # | City | Line items | Budget | Plans |
|---|---|---|---|---|
| 1 | Greenwich | 12 | $277M | 1 |
| 2 | West Haven | 11 | $192M | 1 |
| 3 | Danbury | 51 | $102M | 1 |
| 4 | Stratford | 12 | $23M | 1 |
| 5 | Glastonbury | 9 | $18M | 1 |
| 6 | Groton | 3 | $9M | 1 |
| 7 | Stamford | 3 | $7M | 1 |
| 8 | Plainfield | 18 | $5M | 1 |
| 9 | Westport | 12 | $2M | 1 |
| 10 | Beacon Falls | 3 | $1M | 1 |
| 11 | Middletown | 13 | $978K | 1 |
Planned spend by start year
Before 2026
$360M
92 items
2026
$286M
26 items
2027
$22M
14 items
2028
$15M
4 items
2029
$8M
8 items
2030
$26M
4 items
2031
$275K
2 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 39 | $291M | 41% |
| Sewer | 78 | $390M | 54% |
| Water Supply | 23 | $24M | 3% |
| Water Distribution | 10 | $12M | 2% |
Project types in Connecticut
The largest planned projects in Connecticut
| # | Project | City | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Grass Island Wastewater Treatment Plant - Asset Management | Greenwich, CT | Wastewater treatment plant upgrades | $119M | 2025–2040 |
| 2 | Outfall Reconstruction | West Haven, CT | Force mains and interceptors | $71M | 2026–2028 |
| 3 | Sewer Rehab | Greenwich, CT | Sewer rehabilitation and I&I | $64M | 2026–2040 |
| 4 | Sewer Rehabilitation | West Haven, CT | Sewer rehabilitation and I&I | $53M | 2026–2029 |
| 5 | Collections System Rehabilitation | East Norwalk, CT | — | $50M | 2025–2030 |
| 6 | Treatment Plant Incinerator | West Haven, CT | Biosolids, sludge and dewatering | $37M | 2026–2028 |
| 7 | OG Pump Station | Greenwich, CT | Pump stations | $32M | 2025–2030 |
| 8 | WWTP Rehabilitation/Improvement | East Norwalk, CT | Wastewater treatment plant upgrades | $30M | 2025–2027 |
| 9 | Pump Station Rehabilitation | Greenwich, CT | Pump stations | $23M | 2030–2040 |
| 10 | West Side Sewer Line Program - Phase II | Danbury, CT | Sewer rehabilitation and I&I | $20M | 2025–2028 |
All 150 Connecticut line items in Klarifi
Every project with its description, page reference and source document, filterable by city, department, type, budget and year, linked to the plants and decision-makers in each city.
Connecticut capital plan questions
Sources and methodology
Budgets and years are as published in each city’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.
Data refreshed September 11, 2026.