Sewer rehabilitation and I&I projects in US capital improvement plans
2,270 planned projects · $13.3B · 451 cities in 43 states
In short
How many sewer rehabilitation projects are in US city capital plans?
Klarifi’s extraction of published capital improvement plans finds 2,270 sewer rehabilitation projects in 451 cities across 43 states, with a combined budget of $13.3B. The largest is Combined Sewer Overflow Control Implementation in Omaha, NE, at $555M.
Sanitary sewer lining, replacement and point repairs, manhole rehabilitation, inflow and infiltration reduction, CCTV inspection and collection-system programs. The list below ranks the 10 largest by budget; every city links to its full capital plan page. What is inflow and infiltration? →
The largest sewer rehabilitation projects
| # | Project | City | Budget | Years |
|---|---|---|---|---|
| 1 | Combined Sewer Overflow Control Implementation | Omaha, NE | $555M | 2025–2030 |
| 2 | Sanitary Sewer Upgrade | Richmond, VA | $343M | 2026–2030 |
| 3 | Sanitary Sewers | Richmond, VA | $331M | 2025–2029 |
| 4 | Install and Expand New Water and Sewer Service | Charlotte, NC | $264M | 2026–2030 |
| 5 | Sanitary Sewer - Annual Contract | Atlanta, GA | $258M | 2026–2030 |
| 6 | Sewer Main Lining | Chicago, IL | $241M | 2024–2028 |
| 7 | Sewer Mainline and Lateral Projects | Honolulu, HI | $201M | 2025–2031 |
| 8 | Combined Sewer Overflow | Richmond, VA | $200M | 2026–2030 |
| 9 | Pipe Renewal Program | Seattle, WA | $197M | 2025–2030 |
| 10 | Combined Sewer Overflows | Seattle, WA | $184M | 2025–2026 |
All 2,270 sewer rehabilitation projects, with descriptions and contacts
Every line item with its description, page reference and source document, filterable by state, budget and start year, linked to the treatment plants and decision-makers in each city, and refreshed as new plans are adopted.
Cities with the most sewer rehabilitation projects
| City | Projects | Budget |
|---|---|---|
| Columbus, OH | 43 | $243M |
| Spokane, WA | 37 | $40M |
| Ann Arbor, MI | 36 | $67M |
| Birmingham, MI | 35 | $26M |
| Honolulu, HI | 31 | $972M |
| Watertown, NY | 29 | $20M |
| Brooklyn, MI | 29 | $12M |
| Greensboro, NC | 24 | $244M |
| Kalamazoo, MI | 24 | $39M |
| Neenah, WI | 24 | $10M |
| Schaumburg, IL | 23 | $18M |
| Findlay, OH | 23 | $13M |
States with the most sewer rehabilitation projects
| State | Projects | Budget |
|---|---|---|
| Michigan | 482 | $497M |
| California | 158 | $463M |
| Washington | 144 | $939M |
| Wisconsin | 112 | $105M |
| Ohio | 111 | $288M |
| Illinois | 105 | $679M |
| Minnesota | 93 | $214M |
| Florida | 85 | $1.1B |
| Missouri | 77 | $126M |
| Iowa | 70 | $198M |
| Virginia | 69 | $1.4B |
| Texas | 69 | $1.1B |
Planned spend by start year
Before 2026
$8.4B
1,155 items
2026
$3.0B
481 items
2027
$821M
247 items
2028
$558M
165 items
2029
$226M
100 items
2030
$253M
57 items
2031
$41M
30 items
2032 and later
$41M
35 items
Other project types
Questions about sewer rehabilitation projects
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 October 12, 2026.
Wastewater terms: Lift station · Inflow and infiltration · Sludge dewatering · WWTP · Activated sludge · Oxidation ditch · all terms