Oxidation ditches: wastewater treatment plants in Alabama
33 plants · 13% of the state · 67 MGD reported by 32 plants
Klarifi identifies 33 publicly owned wastewater treatment plants with oxidation ditches in Alabama, 13% of the 257 plants in the state (67 MGD reported by 32 plants). The largest is City Of Huntsville in Madison at 11.76 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 Alabama
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | City Of Huntsville | Madison | 11.76 | AL0049531 | Jun 2030 | 2 |
| 2 | Aldridge Creek Wastewater Treatment Plant | Huntsville | 4.97 | AL0056855 | Feb 2027 | 0 |
| 3 | Jasper Town Creek WWTP | Jasper | 4.17 | AL0023418 | Sep 2029 | 2 |
| 4 | Alabaster WWTP | Alabaster | 3.91 | AL0025828 | Nov 2029 | 1 |
| 5 | Turkey Creek WWTP | Pinson | 3.88 | AL0022926 | Jun 2026 | 1 |
| 6 | Walnut Creek WWTP | Troy | 3.11 | AL0032310 | Nov 2029 | 22 |
| 7 | Opelika Westside WWTP | Opelika | 3.03 | AL0050130 | Mar 2028 | 5 |
| 8 | Cahaba River Wastewater Treatment Plant | Hoover | 2.98 | ALL023027 | Dec 2030 | 1 |
| 9 | Russellville WWTP | Russellville | 2.63 | AL0027987 | Jul 2027 | 5 |
| 10 | Northport Wastewater Treatment Plant | N Port | 2.55 | AL0064394 | Nov 2025 | 27 |
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 Alabama
Oxidation ditches in other states
Oxidation ditches in Alabama: 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 · POTW · MGD · all terms