Clarifiers and settling projects in US capital improvement plans
176 planned projects · $609M · 107 cities in 29 states
Primary and secondary clarifier mechanisms, tanks, launders and sludge collectors, and dissolved air flotation units.
Klarifi's extraction of published capital improvement plans finds 176 clarifier projects in 107 cities with a combined planning budget of $609M, the largest being Water Plant Improvements - Mt. Carmel, Riverside, DAF in Waco, TX at $57M. The list below ranks the 25 largest by budget; every city links to its full capital plan page.
The largest clarifier projects
| # | Project | City | Budget | Years |
|---|---|---|---|---|
| 1 | Water Plant Improvements - Mt. Carmel, Riverside, DAF | Waco, TX | $57M | 2025–2029 |
| 2 | Patapsco Clarifier Rehabilitation (SC994) | Baltimore, MD | $52M | 2025 |
| 3 | Replacement of Primary Clarifiers | Greensboro, NC | $46M | 2030–2035 |
| 4 | WTRF Primary Treatment Phase 2 | Greeley, CO | $45M | 2024–2025 |
| 5 | ONSWTP Sedimentation Basin Improvements | Corpus Christi, TX | $37M | 2025–2029 |
| 6 | Broadway WWTP Third Clarifier | Corpus Christi, TX | $20M | 2025–2026 |
| 7 | Back River Activated Plant 3 Clarifiers Rehab (SC1032) - Project 1355 | Baltimore, MD | $19M | 2025–2026 |
| 8 | Secondary Clarifiers | Arlington, VA | $18M | 2031–2034 |
| 9 | Clarifier Drives & Sweeps (5-8) | Kalamazoo, MI | $17M | 2025–2027 |
| 10 | Upgrades & Miscellaneous Improvements Jackson Pike A-Plant Secondary Clarifier Electrical | Columbus, OH | $16M | 2025–2028 |
| 11 | Clarifier Drives & Sweeps (5–8) | Kalamazoo, MI | $16M | 2025–2027 |
| 12 | Willow Lake Water Pollution Control Facility (WPCF) - South Secondary Clarifiers | Salem, OR | $13M | 2027–2029 |
| 13 | Secondary Clarifier Upgrades | Greeley, CO | $12M | 2026–2028 |
| 14 | Primary Clarifier Improvements | Greensboro, NC | $11M | 2025–2027 |
| 15 | George T. Lohmeyer WWTP Clarifier Rehabilitation | Fort Lauderdale, FL | $11M | 2025–2026 |
| 16 | George T. Lohmeyer WWTP Clarifier Rehabilitation | Fort Lauderdale, FL | $11M | 2025–2026 |
| 17 | Willow Lake Water Pollution Control Facility (WPCF) South Primary Clarifier Improvements | Salem, OR | $10M | 2027–2030 |
| 18 | WWTP Plant 2 Final Clarifier Mechan | Wichita, KS | $10M | 2033–2034 |
| 19 | Secondary Clarifier Mechanism and Cover | Spokane, WA | $10M | 2027–2030 |
| 20 | Clarifier Upgrades | Newburyport, MA | $7M | 2026–2029 |
| 21 | Devlin WWTP Secondary Clarifier | Roselle, IL | $7M | 2025–2027 |
| 22 | El Pico Clarifier | Laredo, TX | $7M | 2025 |
| 23 | Clarifier Rehab (4) Resurface (4) and Trough Covers SWWTP | Fort Myers, FL | $6M | 2025–2026 |
| 24 | WRF Secondary Clarifiers 4-6 - Construction | Henderson, NV | $5M | 2032 |
| 25 | MWWTP Primary Treatment Improvement (microscreens) | Juneau, AK | $5M | 2031 |
All 176 clarifier 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 clarifier projects
| City | Projects | Budget |
|---|---|---|
| Henderson, NV | 8 | $16M |
| Saint Petersburg, FL | 8 | $14M |
| Greeley, CO | 4 | $59M |
| Sturgis, MI | 4 | $1M |
| Xenia, OH | 4 | $1M |
| Grand Haven, MI | 4 | $1M |
| Blissfield, MI | 4 | $204K |
| Orlando, FL | 3 | $6M |
| Hannibal, MO | 3 | $4M |
| Hutchinson, MN | 3 | $2M |
| Casper, WY | 3 | $1M |
| Faribault, MN | 3 | $1M |
States with the most clarifier projects
| State | Projects | Budget |
|---|---|---|
| Michigan | 39 | $46M |
| Florida | 20 | $60M |
| California | 10 | $12M |
| Ohio | 9 | $22M |
| Nevada | 9 | $17M |
| North Carolina | 8 | $62M |
| Illinois | 8 | $17M |
| Missouri | 8 | $6M |
| Minnesota | 7 | $3M |
| Colorado | 6 | $64M |
| Washington | 6 | $16M |
| Iowa | 6 | $3M |
Planned spend by start year
Before 2026
$388M
75 items
2026
$53M
43 items
2027
$48M
17 items
2028
$13M
14 items
2029
$14M
12 items
2030
$50M
5 items
2031
$28M
5 items
2032 and later
$16M
5 items
Other project types
Clarifiers and settling 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.