South Dakota water and wastewater capital improvement plans
173 planned projects · $455M · 5 cities · 5 plans
The 5 capital improvement plans and adopted budgets Klarifi has extracted for South Dakota list 173 water, sewer and wastewater line items with a combined planning budget of $455M across 5 cities. Sioux Falls has the largest plan at $327M. 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 South Dakota with water and sewer capital plans
| # | City | Line items | Budget | Plans |
|---|---|---|---|---|
| 1 | Sioux Falls | 73 | $327M | 1 |
| 2 | Aberdeen | 21 | $112M | 1 |
| 3 | Watertown | 77 | $10M | 1 |
Planned spend by start year
Before 2026
$428M
90 items
2026
$2M
15 items
2027
$9M
26 items
2028
$8M
14 items
2029
$6M
11 items
2030
$2M
2 items
2031
$24K
3 items
2032 and later
$458K
12 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 89 | $90M | 20% |
| Sewer | 26 | $88M | 19% |
| Water Supply | 30 | $219M | 48% |
| Water Distribution | 28 | $58M | 13% |
Project types in South Dakota
The largest planned projects in South Dakota
| # | Project | City | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Water Reclamation Facility Expansion | Sioux Falls, SD | Wastewater treatment plant upgrades | $105M | 2025–2028 |
| 2 | Lewis and Clark Regional Water Systems | Sioux Falls, SD | — | $52M | 2025–2029 |
| 3 | Southeast Basins Sanitary Sewer Improvements | Sioux Falls, SD | Sewer rehabilitation and I&I | $47M | 2025–2028 |
| 4 | Buildings- Facility Improvements | Aberdeen, SD | Buildings, HVAC and site work | $37M | 2025–2027 |
| 5 | Equipment- Facility Improvements | Aberdeen, SD | Vehicles and equipment | $29M | 2025–2027 |
| 6 | Transmission System Improvements | Sioux Falls, SD | Water mains and distribution | $14M | 2025–2029 |
| 7 | Major Street Reconstruction Program | Sioux Falls, SD | Water mains and distribution | $14M | 2025–2029 |
| 8 | Water Tower & Transmission | Aberdeen, SD | Water mains and distribution | $14M | 2025–2029 |
| 9 | Meters, AMR, DCU Equipment | Sioux Falls, SD | Meters and AMI | $12M | 2025–2029 |
| 10 | Water Purification Facility Improvements | Sioux Falls, SD | Water treatment plants | $12M | 2025–2029 |
All 173 South Dakota 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.
South Dakota 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.