Activated sludge and clarifiers: wastewater treatment plants in Texas
691 plants · 56% of the state · 2,188 MGD reported by 660 plants
Klarifi identifies 691 publicly owned wastewater treatment plants with activated sludge and clarifiers in Texas, 56% of the 1,244 plants in the state (2,188 MGD reported by 660 plants). The largest is Village Creek Reclamation Facility in Arlington at 147.27 MGD.
Activated sludge is the standard mechanical process for cities: aeration basins where bacteria consume organic matter, followed by clarifiers that settle the biomass out. These plants are identified by their circular or rectangular clarifiers and by the suspended-growth process code, and they are the main market for blowers, diffusers, clarifier mechanisms and instrumentation.
The largest activated sludge plants in Texas
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Village Creek Reclamation Facility | Arlington | 147.27 | TX0047295 | Jan 2029 | 3 |
| 2 | Dos Rios Water Recycling Center | San Antonio | 124.77 | TX0077801 | Jun 2025 | 44 |
| 3 | City Of Dallas Central WWTP | Dallas | 118.1 | TX0047830 | Apr 2027 | 11 |
| 4 | Walnut Creek WWTP | Austin | 69.41 | TX0046981 | Mar 2025 | 0 |
| 5 | Southwest WWTP | Houston | 55 | TX0062995 | Sep 2027 | 73 |
| 6 | South Austin Regional WWTP Electrical | Del Valle | 52.19 | TX0071889 | Jun 2031 | 0 |
| 7 | South Mesquite Regional Wastewater Treatment Plant | Mesquite | 43.31 | TX0047431 | Aug 2027 | 24 |
| 8 | Leon Creek Water Recycling Center | San Antonio | 41.23 | TX0052639 | Jul 2027 | 5 |
| 9 | Hillebrandt WWTP | Beaumont | 34.23 | TX0046990 | Apr 2029 | 22 |
| 10 | Roberto R Bustamante WWTP | El Paso | 33.07 | TX0101605 | Apr 2030 | 35 |
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
Activated sludge and clarifiers in other states
Activated sludge and clarifiers 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: Activated sludge · Biological nutrient removal · Equalization tank · Ozonation · Oxidation ditch · all terms