Danbury, Connecticut: water and wastewater capital improvement projects
51 line items · $102M · 1 plan
Danbury's published capital plans list 51 water, sewer and wastewater line items with a combined planning budget of $102M, of which 30 items worth $66M sit in the wastewater and sewer departments. The largest single item is West Side Sewer Line Program - Phase II at $20M (2025–2028). 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 Danbury
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | West Side Sewer Line Program - Phase II | Sewer | Sewer rehabilitation and I&I | $20M | 2025–2028 |
| 2 | EcoFactory | Sewer | — | $11M | 2025–2027 |
| 3 | Margerie High Service Tank and Interconnection | Water Supply | Storage tanks and reservoirs | $8M | 2025–2028 |
| 4 | Water Supply Safe Yield Improvement Projects | Water Supply | — | $8M | 2025–2028 |
| 5 | Sewer Interceptor Capacity Upgrades | Sewer | Force mains and interceptors | $7M | 2025–2028 |
| 6 | Beaver Brook Pump Station Improvement Program | Sewer | Pump stations | $6M | 2025–2028 |
| 7 | Water Main Replacement / Upgrades - Alan Ave | Water Distribution | Water mains and distribution | $3M | 2025–2028 |
| 8 | Mill Plain Sewer Extension and Pump Station elimination | Sewer | Pump stations | $3M | 2025–2027 |
| 9 | Middle River Road Retaining Wall Repair / Replacement | Water Supply | Buildings, HVAC and site work | $3M | 2025–2028 |
| 10 | Margerie WTP - Replace 30 inch steel distribution line. | Water Distribution | Water treatment plants | $3M | 2025–2027 |
41 more line items in Danbury, with descriptions and contacts
Klarifi holds every Danbury line item with its description, the page it appears on and the source document, plus 10 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
$102M
51 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Sewer | 30 | $66M | 65% |
| Water Supply | 15 | $24M | 23% |
| Water Distribution | 6 | $12M | 12% |
Project types in Danbury's plan
Wastewater treatment plants in Danbury
1 publicly owned treatment plant in Danbury 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) |
|---|---|---|---|
| Danbury Water Pollution Control Facility | 7.8 | CT0100145 | 5 |
Other Connecticut cities with capital plans
Danbury capital plan questions
Sources and methodology
Budgets and years are as published in Danbury’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 2025–2031 (51 line items).
Data refreshed September 11, 2026.