Biosolids, sludge and dewatering projects in US capital improvement plans
341 planned projects · $3.4B · 179 cities in 37 states
Thickening, dewatering, drying and disposal of the solids a plant removes: presses and centrifuges, drying beds and dryers, storage and hauling, and the outlets for land application, landfill or incineration.
Klarifi's extraction of published capital improvement plans finds 341 biosolids and dewatering projects in 179 cities with a combined planning budget of $3.4B, the largest being Biosolids and Odor Control in Nashville, TN at $441M. The list below ranks the 25 largest by budget; every city links to its full capital plan page.
The largest biosolids and dewatering projects
| # | Project | City | Budget | Years |
|---|---|---|---|---|
| 1 | Biosolids and Odor Control | Nashville, TN | $441M | 2025–2030 |
| 2 | Recover Resources and Biosolids | Charlotte, NC | $293M | 2026–2030 |
| 3 | Buckman Reclamation Facility - Biosolids Conversion - Process Facility | Jacksonville, FL | $253M | 2024–2028 |
| 4 | Honouliuli WWTP Headworks, PS, Energy Savings, Solids Processing and Misc Improvements | Honolulu, HI | $236M | 2025–2029 |
| 5 | City-Wide Wastewater ID/IQ | Corpus Christi, TX | $222M | 2025–2034 |
| 6 | Lander Street Water Renewal Facility | Boise, ID | $155M | 2026–2030 |
| 7 | KWRP Sustainable Residual Biosolids | Kalamazoo, MI | $136M | 2025–2028 |
| 8 | Biosolids Processing Facility | Rock Hill, SC | $84M | 2025–2026 |
| 9 | BR WWTP Sludge Storage | Baltimore, MD | $73M | 2028 |
| 10 | Biosolids Handling Facility | Windsor, CA | $56M | 2023–2027 |
| 11 | Stiles WWTF Biosolids Upgrades | Memphis, TN | $51M | 2025–2029 |
| 12 | Kailua Wastewater Treatment Plant - Solids Handling System Improvements | Honolulu, HI | $48M | 2025–2029 |
| 13 | Wastewater OWTP: Primary Clarifiers and Activated Sludge Improvements | Oxnard, CA | $43M | 2025–2027 |
| 14 | ONSWTP Solids Handling & Disposal Facility | Corpus Christi, TX | $40M | 2026–2028 |
| 15 | Kahuku WWTP - Septage Receiving, SBR and Sludge Thickening Improvements | Honolulu, HI | $40M | 2025–2029 |
| 16 | Patapsco Sludge Blend Tank Rehabilitation (SC1018) | Baltimore, MD | $37M | 2025 |
| 17 | Comprehensive Biosolids | Baltimore, MD | $37M | 2029 |
| 18 | Treatment Plant Incinerator | West Haven, CT | $37M | 2026–2028 |
| 19 | Cedar Creek WWTP Solids Handling Expansion | Olathe, KS | $35M | 2025–2027 |
| 20 | Comprehensive Biosolids Management Plan (SC951) | Baltimore, MD | $35M | 2027 |
| 21 | WRRF Full Scale Biosolids Thermal Drying | Murfreesboro, TN | $33M | 2025 |
| 22 | JPWWTP Gravity Thickening Improvements | Columbus, OH | $31M | 2025–2026 |
| 23 | 5922 - LMFP Residuals Handling Improvements (DWRF) | Grand Rapids, MI | $30M | 2029 |
| 24 | Biosolids Treatment Project (CIP 5) | Monroe, WA | $29M | 2025–2026 |
| 25 | TZO - Solids Handling Design Build | Greensboro, NC | $29M | 2025–2027 |
All 341 biosolids and dewatering 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 biosolids and dewatering projects
| City | Projects | Budget |
|---|---|---|
| Midland, MI | 8 | $535K |
| Jacksonville, FL | 7 | $301M |
| Columbus, OH | 7 | $99M |
| Waukesha, WI | 7 | $20M |
| Fort Lauderdale, FL | 6 | $55M |
| Spokane, WA | 6 | $5M |
| Brighton, MI | 6 | $570K |
| Owosso, MI | 5 | $17M |
| Springfield, MO | 5 | $9M |
| Watertown, NY | 5 | $8M |
| Alpena, MI | 5 | $545K |
| Hanover, NH | 5 | $513K |
States with the most biosolids and dewatering projects
| State | Projects | Budget |
|---|---|---|
| Michigan | 66 | $242M |
| California | 30 | $219M |
| Florida | 29 | $410M |
| Wisconsin | 22 | $25M |
| Washington | 18 | $78M |
| North Carolina | 16 | $377M |
| Ohio | 15 | $101M |
| Missouri | 14 | $13M |
| Texas | 13 | $294M |
| New Hampshire | 13 | $46M |
| Colorado | 11 | $33M |
| Virginia | 10 | $63M |
Planned spend by start year
Before 2026
$2.2B
157 items
2026
$729M
68 items
2027
$228M
49 items
2028
$124M
29 items
2029
$81M
20 items
2030
$37M
11 items
2032 and later
$5M
7 items
Other project types
Biosolids, sludge and dewatering project 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.