Plainfield, Illinois: water and wastewater capital improvement projects
12 line items · $24M · starting 2026 · 1 plan
Plainfield's published capital plans list 12 water, sewer and wastewater line items with a combined planning budget of $24M, of which 12 items worth $24M sit in the wastewater and sewer departments. The largest single item is Old Town Reconstruction at $10M (2025–2026). 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 Plainfield
| # | Project | Department | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Old Town Reconstruction | Sewer | Sewer rehabilitation and I&I | $10M | 2025–2026 |
| 2 | Old Town South | Sewer | — | $5M | 2026 |
| 3 | Liftstation Improvements | Sewer | Lift stations | $3M | 2025–2026 |
| 4 | Lockport St. Sanitary Sewer Ext. | Sewer | Sewer rehabilitation and I&I | $3M | 2026 |
| 5 | Well House Pump Rebuild | Sewer | Pump stations | $900K | 2025–2026 |
| 6 | 143rd St. West Watermain | Sewer | Water mains and distribution | $620K | 2025 |
| 7 | Machinery & Equipment | Sewer | Vehicles and equipment | $500K | 2025–2026 |
| 8 | Wastewater Treatment Plant | Wastewater | Wastewater treatment plant upgrades | $500K | 2025–2026 |
| 9 | Engineering Fees | Sewer | — | $300K | 2025–2026 |
| 10 | Vehicles | Sewer | Vehicles and equipment | $200K | 2025–2026 |
2 more line items in Plainfield, with descriptions and contacts
Klarifi holds every Plainfield line item with its description, the page it appears on and the source document, plus 19 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
$16M
10 items
2026
$8M
2 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 1 | $500K | 2% |
| Sewer | 11 | $23M | 98% |
Project types in Plainfield's plan
Wastewater treatment plants in Plainfield
1 publicly owned treatment plant in Plainfield. Each profile shows flow, permit, technology and compliance data.
| Plant | Avg flow (MGD) | NPDES | Violations (3y) |
|---|---|---|---|
| Plainfield North Stp, Village Of | 4.34 | ILL074373 | 0 |
Other Illinois cities with capital plans
Plainfield capital plan questions
Sources and methodology
Budgets and years are as published in Plainfield’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 2025–2026 (12 line items).
Data refreshed September 11, 2026.