Sioux Falls, South Dakota: water and wastewater capital improvement projects
73 line items · $327M · starting 2026–2029 · 1 plan
Sioux Falls's published capital plans list 73 water, sewer and wastewater line items with a combined planning budget of $327M, of which 27 items worth $79M sit in the wastewater and sewer departments. The largest single item is Water Reclamation Facility Expansion at $105M (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 Sioux Falls
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Water Reclamation Facility Expansion | Water Supply | Wastewater treatment plant upgrades | $105M | 2025–2028 |
| 2 | Lewis and Clark Regional Water Systems | Water Supply | — | $52M | 2025–2029 |
| 3 | Southeast Basins Sanitary Sewer Improvements | Sewer | Sewer rehabilitation and I&I | $47M | 2025–2028 |
| 4 | Transmission System Improvements | Water Distribution | Water mains and distribution | $14M | 2025–2029 |
| 5 | Major Street Reconstruction Program | Water Distribution | Water mains and distribution | $14M | 2025–2029 |
| 6 | Meters, AMR, DCU Equipment | Water Supply | Meters and AMI | $12M | 2025–2029 |
| 7 | Water Purification Facility Improvements | Water Supply | Water treatment plants | $12M | 2025–2029 |
| 8 | Other Mains -Unforeseen Sanitary Sewers | Sewer | Sewer rehabilitation and I&I | $11M | 2025–2029 |
| 9 | Arterial Street Improvements | Water Distribution | Water mains and distribution | $8M | 2025–2029 |
| 10 | Northeast Basins Sanitary Sewer Improvements | Sewer | Sewer rehabilitation and I&I | $6M | 2025–2029 |
63 more line items in Sioux Falls, with descriptions and contacts
Klarifi holds every Sioux Falls line item with its description, the page it appears on and the source document. Track new plans as they are adopted and compare with similar projects in other cities.
Planned spend by start year
Before 2026
$321M
63 items
2026
$750K
4 items
2027
$595K
2 items
2029
$4M
4 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 11 | $9M | 3% |
| Sewer | 16 | $70M | 22% |
| Water Supply | 21 | $196M | 60% |
| Water Distribution | 25 | $52M | 16% |
Project types in Sioux Falls's plan
Wastewater treatment plants in Sioux Falls
No publicly owned treatment plant is recorded under Sioux Falls in the facility directory; the city may be served by a regional plant listed under another municipality. Browse all plants in South Dakota.
Other South Dakota cities with capital plans
Sioux Falls capital plan questions
Sources and methodology
Budgets and years are as published in Sioux Falls’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 (73 line items).
Data refreshed September 11, 2026.