Oxidation ditches: wastewater treatment plants in Missouri
64 plants · 10% of the state · 182 MGD reported by 61 plants
Klarifi identifies 64 publicly owned wastewater treatment plants with oxidation ditches in Missouri, 10% of the 671 plants in the state (182 MGD reported by 61 plants). The largest is Little Blue Valley Sewer District in Independence at 39.13 MGD.
Oxidation ditches are ring-shaped activated sludge reactors with long retention times, common at plants between 0.5 and 10 MGD. They are recognisable from the air by their looped channels and rely on surface aerators or brush rotors, which are frequent replacement and energy-efficiency projects.
The largest oxidation ditch plants in Missouri
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Little Blue Valley Sewer District | Independence | 39.13 | MOL101087 | Dec 2030 | 14 |
| 2 | Southwest WWTP | Springfield | 30.9 | MO0049522 | Jul 2025 | 0 |
| 3 | Metropolitan St Louis Sewer District-Grand Glaize Wastewater Treatment Plant | Valley Park | 12.6 | MO0101362 | Aug 2031 | 0 |
| 4 | Joplin Turkey Creek WWTP | Joplin | 9.49 | MO0103349 | Sep 2022 | 65 |
| 5 | Shoal Creek Wastewater Treatment Facility | Joplin | 5.66 | MO0023256 | Mar 2023 | 11 |
| 6 | St Peters Pws | Saint Peters | 5.65 | MO0030970 | Dec 2024 | 0 |
| 7 | Springfield NW WWTP | Springfield | 5 | MO0103039 | Jul 2025 | 0 |
| 8 | Dcsd Wastewater Treatment Plant 2 | Weldon Spring | 4.93 | MO0116572 | Dec 2025 | 0 |
| 9 | Duckett Creek Sanitation District Treatment Plant #1 | Saint Charles | 4.45 | MO0085472 | Jun 2021 | 0 |
| 10 | St Charles Missouri River WWTP | St. Charles | 4.2 | MO0058351 | Sep 2025 | 0 |
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 Missouri
Oxidation ditches in other states
Oxidation ditches in Missouri: 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: Oxidation ditch · Activated sludge · Biological nutrient removal · Centrate · Ozonation · all terms