Activated sludge and clarifiers: wastewater treatment plants in Kansas
58 plants · 16% of the state · 130 MGD reported by 56 plants
Klarifi identifies 58 publicly owned wastewater treatment plants with activated sludge and clarifiers in Kansas, 16% of the 355 plants in the state (130 MGD reported by 56 plants). The largest is Kansas City Water Pollution Control Div. in Kansas City at 17.31 MGD.
Activated sludge is the standard mechanical process for cities: aeration basins where bacteria consume organic matter, followed by clarifiers that settle the biomass out. These plants are identified by their circular or rectangular clarifiers and by the suspended-growth process code, and they are the main market for blowers, diffusers, clarifier mechanisms and instrumentation.
The largest activated sludge plants in Kansas
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Kansas City Water Pollution Control Div. | Kansas City | 17.31 | KS0038563 | May 2030 | 0 |
| 2 | Joco Tomahawk Creek | Leawood | 14.9 | KS0100854 | Apr 2031 | 1 |
| 3 | Joco Mill Creek Regional Wtf | Shawnee | 11.46 | KS0088269 | Jan 2030 | 0 |
| 4 | Joco Nelson Complex Wastewater Plant | Mission | 11.17 | KS0055492 | Jan 2030 | 50 |
| 5 | Lawrence, City Of | Lawrence | 7.45 | KS0038644 | Jul 2029 | 14 |
| 6 | Joco Blue River District #1 | Stanley | 6.3 | KS0092738 | Dec 2027 | 0 |
| 7 | Olathe (cedar Creek) Wastewater Plant | Olathe | 4.47 | KS0081299 | Dec 2029 | 0 |
| 8 | Emporia Wastewater Treatment Plant | Emporia | 4.21 | KS0046728 | Apr 2028 | 27 |
| 9 | Salina, City Of | Salina | 3.71 | KS0038474 | Dec 2029 | 5 |
| 10 | Leavenworth, City Of | Leavenworth | 3.43 | KS0036366 | Feb 2028 | 10 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in Kansas
Activated sludge and clarifiers in other states
Activated sludge and clarifiers in Kansas: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026.
Wastewater terms: Activated sludge · Biological nutrient removal · Equalization tank · Biosolids · Filter press · all terms