Washington water and wastewater capital improvement plans
1,037 planned projects · $6.4B · 24 cities · 25 plans
The 25 capital improvement plans and adopted budgets Klarifi has extracted for Washington list 1,037 water, sewer and wastewater line items with a combined planning budget of $6.4B across 24 cities. Seattle has the largest plan at $3.0B. 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 Washington with water and sewer capital plans
| # | City | Line items | Budget | Plans |
|---|---|---|---|---|
| 1 | Seattle | 70 | $3.0B | 2 |
| 2 | Vancouver | 135 | $1.2B | 1 |
| 3 | Tacoma | 10 | $547M | 1 |
| 4 | Spokane | 244 | $518M | 1 |
| 5 | Edmonds | 23 | $245M | 1 |
| 6 | Monroe | 51 | $101M | 1 |
| 7 | Olympia | 80 | $99M | 1 |
| 8 | Kennewick | 36 | $94M | 1 |
| 9 | Yakima | 38 | $84M | 1 |
| 10 | Richland | 19 | $83M | 1 |
| 11 | Puyallup | 50 | $83M | 1 |
| 12 | Pullman | 55 | $61M | 1 |
| 13 | Walla Walla | 40 | $50M | 1 |
| 14 | Federal Way | 21 | $49M | 1 |
| 15 | Shelton | 17 | $41M | 1 |
| 16 | Bainbridge Island | 24 | $31M | 1 |
| 17 | Snoqualmie | 11 | $30M | 1 |
| 18 | Longview | 44 | $29M | 1 |
| 19 | Poulsbo | 20 | $26M | 1 |
| 20 | Des Moines | 17 | $17M | 1 |
| 21 | Kelso | 9 | $16M | 1 |
| 22 | Eatonville | 6 | $7M | 1 |
| 23 | Duvall | 12 | $7M | 1 |
| 24 | Mount Vernon | 5 | $5M | 1 |
Planned spend by start year
Before 2026
$5.0B
592 items
2026
$187M
121 items
2027
$397M
108 items
2028
$158M
77 items
2029
$138M
61 items
2030
$233M
46 items
2031
$13M
5 items
2032 and later
$227M
27 items
By department
| Department | Line items | Budget | Share |
|---|---|---|---|
| Wastewater | 304 | $2.0B | 32% |
| Sewer | 234 | $1.9B | 29% |
| Water Supply | 276 | $1.7B | 26% |
| Water Distribution | 223 | $802M | 13% |
Project types in Washington
The largest planned projects in Washington
| # | Project | City | Type | Budget | Years |
|---|---|---|---|---|---|
| 1 | Ship Canal Water Quality Project | Seattle, WA | Force mains and interceptors | $240M | 2025–2028 |
| 2 | Watermain Rehabilitation | Seattle, WA | Water mains and distribution | $210M | 2025–2030 |
| 3 | Pipe Renewal Program | Seattle, WA | Sewer rehabilitation and I&I | $197M | 2025–2030 |
| 4 | Combined Sewer Overflows | Seattle, WA | Sewer rehabilitation and I&I | $184M | 2025–2026 |
| 5 | Westside Solids Treatment Upgrades | Vancouver, WA | Wastewater treatment plant upgrades | $180M | 2027–2030 |
| 6 | Shared Cost Projects | Seattle, WA | Stormwater and flood resilience | $176M | 2025–2026 |
| 7 | Future CSO Projects | Seattle, WA | Stormwater and flood resilience | $176M | 2025–2030 |
| 8 | Water Supply/Transmission/Storage | Tacoma, WA | Water mains and distribution | $126M | 2025–2030 |
| 9 | GSI for Protection of Beneficial Uses | Seattle, WA | Stormwater and flood resilience | $125M | 2025–2030 |
| 10 | Distribution | Seattle, WA | Water mains and distribution | $119M | 2025–2026 |
All 1,037 Washington 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.
Washington 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.