Oxidation ditches: wastewater treatment plants in Arkansas
28 plants · 9% of the state · 37 MGD reported by 27 plants
Klarifi identifies 28 publicly owned wastewater treatment plants with oxidation ditches in Arkansas, 9% of the 324 plants in the state (37 MGD reported by 27 plants). The largest is Fayetteville/ West Side WWTP in Fayetteville at 10.18 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 Arkansas
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Fayetteville/ West Side WWTP | Fayetteville | 10.18 | ARL050288 | Dec 2030 | 0 |
| 2 | Benton WWTP | Benton | 4.49 | AR0036498 | Mar 2026 | 4 |
| 3 | Northwest Arkansas Conservation Authority -Regional WWTP | Bentonville | 3.99 | AR0050024 | Dec 2026 | 160 |
| 4 | Jacksonville Wastewater Utility | Jacksonville | 3.97 | AR0041335 | Jan 2029 | 0 |
| 5 | Green Forest, City Of - Green Forest WWTP | Green Forest | 2.53 | AR0021741 | Mar 2027 | 0 |
| 6 | Mountain Home Wastewater Treatment Plant | Mountain Home | 2.1 | ARL021211 | Dec 2030 | 0 |
| 7 | Cwl-West Side Wastewater Treatment Plant | Jonesboro | 1.84 | AR0037907 | Mar 2028 | 3 |
| 8 | Camden, Arkansas Water Treatment Plant | Camden | 1.47 | AR0022365 | Dec 2028 | 0 |
| 9 | Clarksville Connected Utilities - Pollution Control Facility | Clarksville | 1.14 | ARL022187 | Dec 2030 | 2 |
| 10 | Berryville, City Of-WWTP | Berryville | 1.12 | AR0021792 | Oct 2021 | 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 Arkansas
Oxidation ditches in other states
Oxidation ditches in Arkansas: 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 · Tertiary treatment · Significant industrial user · all terms