Nashua, New Hampshire: water and wastewater capital improvement projects
16 line items · $83M · starting 2026–2028 · 1 plan
Nashua's published capital plans list 16 water, sewer and wastewater line items with a combined planning budget of $83M, of which 16 items worth $83M sit in the wastewater and sewer departments. The largest single item is Class A Biosolids at $26M (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 Nashua
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Class A Biosolids | Wastewater | Biosolids, sludge and dewatering | $26M | 2027 |
| 2 | Annual Sewer Infrastructure Improvements Programs | Wastewater | Sewer rehabilitation and I&I | $24M | 2026–2031 |
| 3 | WW Plant Vehicle Garage | Wastewater | Buildings, HVAC and site work | $11M | 2026–2027 |
| 4 | WWPlant Phase I | Wastewater | — | $6M | 2026 |
| 5 | Annual Stormwater Management/Abatement | Wastewater | Stormwater and flood resilience | $5M | 2026–2031 |
| 6 | WWTF Misc. Electrical Component Upgrades | Wastewater | Wastewater treatment plant upgrades | $3M | 2026–2027 |
| 7 | Sewer & Drain Castings Rehab | Wastewater | Sewer rehabilitation and I&I | $2M | 2026–2031 |
| 8 | Grit Facility Upgrades | Wastewater | Headworks, screening and grit | $2M | 2027–2028 |
| 9 | CSO Flooding | Wastewater | Stormwater and flood resilience | $1M | 2026–2031 |
| 10 | Sludge Storage Tank Upgrades | Wastewater | Biosolids, sludge and dewatering | $1M | 2026 |
6 more line items in Nashua, with descriptions and contacts
Klarifi holds every Nashua line item with its description, the page it appears on and the source document, plus 11 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
2026
$55M
12 items
2027
$28M
3 items
2028
$300K
1 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 16 | $83M | 100% |
Project types in Nashua's plan
Wastewater treatment plants in Nashua
1 publicly owned treatment plant in Nashua with 87 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Nashua WWTP | 9.2 | NH0100170 | 87 |
Other New Hampshire cities with capital plans
Nashua capital plan questions
Sources and methodology
Budgets and years are as published in Nashua’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 (16 line items).
Data refreshed September 11, 2026.