Idaho water and wastewater capital improvement plans
18 planned projects · $678M · 2 cities · 2 plans
The 2 capital improvement plans and adopted budgets Klarifi has extracted for Idaho list 18 water, sewer and wastewater line items with a combined planning budget of $678M across 2 cities. Boise has the largest plan at $672M. 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 Idaho with water and sewer capital plans
| # | City | Line items | Budget | Plans |
|---|---|---|---|---|
| 1 | Boise | 11 | $672M | 1 |
| 2 | Sandpoint | 7 | $6M | 1 |
Planned spend by start year
2026
$678M
18 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 7 | $441M | 65% |
| Sewer | 4 | $42M | 6% |
| Water Supply | 5 | $38M | 6% |
| Water Distribution | 2 | $157M | 23% |
Project types in Idaho
The largest planned projects in Idaho
| # | Project | City | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Recycled Water Facility | Boise, ID | Water reuse and reclaimed water | $294M | 2026–2030 |
| 2 | Lander Street Water Renewal Facility | Boise, ID | Biosolids, sludge and dewatering | $155M | 2026–2030 |
| 3 | West Boise Water Renewal Facility | Boise, ID | Anaerobic digesters and biogas | $128M | 2026–2030 |
| 4 | Collection System | Boise, ID | Sewer rehabilitation and I&I | $40M | 2026–2030 |
| 5 | Major Equipment | Boise, ID | Vehicles and equipment | $29M | 2026–2030 |
| 6 | Water Renewal Percent For Art | Boise, ID | Planning, studies and asset management | $7M | 2026–2030 |
| 7 | Enchance The River | Boise, ID | — | $7M | 2026–2030 |
| 8 | Phosphorus Management Planning | Boise, ID | Nutrient removal | $6M | 2026–2030 |
| 9 | Phosphorus Removal Facility | Boise, ID | Nutrient removal | $5M | 2026–2030 |
| 10 | Watermain Projects | Sandpoint, ID | Water mains and distribution | $3M | 2026 |
All 18 Idaho 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.
Idaho 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.