Oxidation ditches: wastewater treatment plants in Oklahoma
29 plants · 12% of the state · 38 MGD reported by 27 plants
Klarifi identifies 29 publicly owned wastewater treatment plants with oxidation ditches in Oklahoma, 12% of the 236 plants in the state (38 MGD reported by 27 plants). The largest is Haikey Creek Wastewater Treatment Plant in Broken Arrow at 12.67 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 Oklahoma
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Haikey Creek Wastewater Treatment Plant | Broken Arrow | 12.67 | OK0034363 | Apr 2030 | 3 |
| 2 | Edmond, City Of - Coffee Creek | Edmond | 6.91 | OK0026026 | Oct 2030 | 20 |
| 3 | Owasso Public Works Authority | Owasso | 2.98 | OK0020303 | Jul 2028 | 4 |
| 4 | Enid, City Of | Enid | 2.89 | OK0021628 | Jul 2029 | 8 |
| 5 | Jenks Wastewater Treat. Plant | Jenks | 1.95 | OK0037401 | Aug 2030 | 18 |
| 6 | Mcalester, City Of - West Plant | Mcalester | 1.45 | OK0026093 | May 2026 | 96 |
| 7 | City Of Sallisaw Solid Waste Disposal Facility | Sallisaw | 1.42 | OK0028169 | Oct 2030 | 17 |
| 8 | Duncan Public Utilities Auth | Duncan | 1.37 | OK0026638 | Jul 2028 | 380 |
| 9 | Weatherford Public Works Authority | Weatherford | 1.11 | OK0021563 | Jul 2028 | 1 |
| 10 | Tulsa MUA-Lower Bird Ck Plant | Catoosa | 1.03 | OK0042935 | Jul 2029 | 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 Oklahoma
Oxidation ditches in other states
Oxidation ditches in Oklahoma: 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 · Ozonation · Anaerobic digester · all terms