Oxidation ditches: wastewater treatment plants in Texas
261 plants · 21% of the state · 371 MGD reported by 249 plants
Klarifi identifies 261 publicly owned wastewater treatment plants with oxidation ditches in Texas, 21% of the 1,244 plants in the state (371 MGD reported by 249 plants). The largest is Bell County Wcid #1 Wastewater Treatment Facility in Killeen at 17.65 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 Texas
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Bell County Wcid #1 Wastewater Treatment Facility | Killeen | 17.65 | TX0102938 | Feb 2030 | 36 |
| 2 | New Vince Bayou WWTF | Pasadena | 13.95 | TX0117528 | Jul 2026 | 132 |
| 3 | Temple Belton WWTP | Belton | 13.65 | TX0058378 | Jul 2030 | 25 |
| 4 | City Of Tyler- Westside Wastewater Treatment Plant | Tyler | 10.94 | TX0047996 | Aug 2031 | 36 |
| 5 | South Laredo WWTP | Laredo | 10.86 | TX0085316 | Jun 2031 | 2 |
| 6 | Medio Creek Water Recyc. Ctr. | San Antonio | 9.52 | TX0055689 | May 2028 | 2 |
| 7 | Little Cedar Bayou Wastewater Treatment Facility | La Porte | 9.24 | TX0022799 | Apr 2030 | 8 |
| 8 | South Mission 1 WWTP | Mission | 9.06 | TX0070017 | Apr 2028 | 0 |
| 9 | City Of Tyler - Southside Wastewater Treatment Plant | Tyler | 8.82 | TXR05X204 | Aug 2026 | 94 |
| 10 | Bob Derrington Water Reclamation Plant | Odessa | 8.49 | TX0072800 | Jul 2025 | 92 |
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 Texas
Oxidation ditches in other states
Oxidation ditches in Texas: 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 · Significant industrial user · WWTP · all terms