Wentzville, Missouri: water and wastewater capital improvement projects
57 line items · $54M · starting 2026–2029 · 1 plan
Wentzville's published capital plans list 57 water, sewer and wastewater line items with a combined planning budget of $54M, of which 33 items worth $11M sit in the wastewater and sewer departments. The largest single item is Waterline Extensions and Replacement at $13M (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 Wentzville
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Waterline Extensions and Replacement | Water Distribution | Water mains and distribution | $13M | 2025–2028 |
| 2 | Deep Aquifer Water Well and Storage | Water Supply | Wells and groundwater | $12M | 2025–2026 |
| 3 | New Water Storage Tank with Water Main Improvements | Water Supply | Water mains and distribution | $9M | 2025–2026 |
| 4 | 2-MG GM Ground Storage Tank Coating Interior and Booster Pump Rebuild | Water Supply | Pump stations | $3M | 2025–2026 |
| 5 | Bypass Trunk Relief | Sewer | Lift stations | $2M | 2025–2026 |
| 6 | Coating Interior and Exterior of Tower #2 | Water Supply | Storage tanks and reservoirs | $1M | 2026–2027 |
| 7 | In-House Waterline Interconnections | Water Distribution | Water mains and distribution | $1M | 2025–2029 |
| 8 | Warehouse/Office Hauled Waste Facility | Wastewater | Buildings, HVAC and site work | $1M | 2026–2027 |
| 9 | Highway 64 Force Main Casing | Sewer | Force mains and interceptors | $1M | 2028 |
| 10 | Crossroads Trunk Relief | Wastewater | Lift stations | $835K | 2029 |
47 more line items in Wentzville, with descriptions and contacts
Klarifi holds every Wentzville line item with its description, the page it appears on and the source document, plus 2 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
$47M
33 items
2026
$3M
7 items
2027
$637K
7 items
2028
$2M
4 items
2029
$2M
6 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 15 | $4M | 8% |
| Sewer | 18 | $7M | 13% |
| Water Supply | 8 | $26M | 49% |
| Water Distribution | 16 | $17M | 31% |
Project types in Wentzville's plan
Wastewater treatment plants in Wentzville
4 publicly owned treatment plants in Wentzville with 12 permit violations in the last three years. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Wentzville Pws | 4.34 | MO0093599 | 4 |
| Dcsd, Treatment Plant 4 | 0.51 | MO0136425 | 2 |
| Sccpwsd#2, Castlegate Mhp And Providence | 0.03 | MO0057801 | 1 |
| Sccpwsd#2, Boone Ridge Estates WWTF | 0.0093 | MO0126594 | 5 |
Other Missouri cities with capital plans
Wentzville capital plan questions
Sources and methodology
Budgets and years are as published in Wentzville’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 2025–2029 (57 line items).
Data refreshed September 11, 2026.