Derry, New Hampshire: water and wastewater capital improvement projects
26 line items · $48M · starting 2026–2030 · 1 plan
Derry's published capital plans list 26 water, sewer and wastewater line items with a combined planning budget of $48M, of which 13 items worth $27M sit in the wastewater and sewer departments. The largest single item is Wastewater Treatment Plant at $14M (2027). 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 Derry
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Wastewater Treatment Plant | Wastewater | Wastewater treatment plant upgrades | $14M | 2027 |
| 2 | Water Supply | Water Supply | Pump stations | $7M | 2025 |
| 3 | Collection System/Interceptors | Sewer | Force mains and interceptors | $7M | 2026–2027 |
| 4 | Water Supply | Water Supply | — | $5M | 2025 |
| 5 | Water Supply | Water Supply | Water mains and distribution | $4M | 2027 |
| 6 | Water Distribution | Water Distribution | Water mains and distribution | $4M | 2025–2030 |
| 7 | Collection System/Lift Stations | Sewer | Lift stations | $3M | 2028 |
| 8 | Collection System/Interceptors | Sewer | Force mains and interceptors | $2M | 2028 |
| 9 | Wastewater Treatment Plant | Wastewater | Wastewater treatment plant upgrades | $650K | 2025 |
| 10 | Vehicle Replacement Program | Wastewater | Vehicles and equipment | $550K | 2025 |
16 more line items in Derry, with descriptions and contacts
Klarifi holds every Derry 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
$18M
13 items
2026
$7M
3 items
2027
$18M
4 items
2028
$5M
3 items
2030
$245K
3 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 8 | $16M | 32% |
| Sewer | 5 | $12M | 24% |
| Water Supply | 4 | $16M | 34% |
| Water Distribution | 9 | $4M | 9% |
Project types in Derry's plan
Wastewater treatment plants in Derry
1 publicly owned treatment plant in Derry with 17 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Derry, Town Of, Wastewater Treatment Plant | 1.17 | NH0100056 | 17 |
Other New Hampshire cities with capital plans
Derry capital plan questions
Sources and methodology
Budgets and years are as published in Derry’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 (26 line items).
Data refreshed September 11, 2026.