Oxidation ditches: wastewater treatment plants in Kentucky
64 plants · 33% of the state · 73 MGD reported by 62 plants
Klarifi identifies 64 publicly owned wastewater treatment plants with oxidation ditches in Kentucky, 33% of the 195 plants in the state (73 MGD reported by 62 plants). The largest is Rwra Max Rhoads WWTP in Owensboro at 7.68 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 Kentucky
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Rwra Max Rhoads WWTP | Owensboro | 7.68 | KY0020095 | Dec 2021 | 1 |
| 2 | Valley Creek Wastewater Treatment Plant | Elizabethtown | 6.45 | KY0022039 | Oct 2023 | 1 |
| 3 | Richmond Otter Creek STP | Richmond | 5.92 | KY0107107 | Dec 2030 | 4 |
| 4 | Strodes Creek STP | Winchester | 4.5 | KY0037991 | Sep 2026 | 1 |
| 5 | Hopkinsville Hammond Wood STP | Hopkinsville | 3.67 | KY0066532 | Sep 2030 | 2 |
| 6 | Bee Creek WWTP | Murray | 3.39 | KY0072761 | Sep 2028 | 2 |
| 7 | Berea Municipal Utilities WWTP | Berea | 3.37 | KY0079898 | Nov 2030 | 0 |
| 8 | London STP | London | 3.07 | KY0021270 | May 2030 | 19 |
| 9 | Waste Water Treatment | Corbin | 2.61 | KY0020133 | Jan 2031 | 28 |
| 10 | Radcliff STP | Radcliff | 2.42 | KY0022390 | Nov 2029 | 1 |
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 Kentucky
Oxidation ditches in other states
Oxidation ditches in Kentucky: 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 · NPDES permit · POTW · all terms