Activated sludge and clarifiers: wastewater treatment plants in Texas
684 plants · 56% of the state · 2,009 MGD reported by 658 plants
Klarifi identifies 684 publicly owned wastewater treatment plants with activated sludge and clarifiers in Texas, 56% of the 1,220 plants in the state (2,009 MGD reported by 658 plants). The largest is Village Creek Reclamation Facility in Arlington at 142 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 | 142 | TX0047295 | Jan 2029 | 3 |
| 2 | Dos Rios Water Recycling Center | San Antonio | 105.32 | TX0077801 | Jun 2025 | 48 |
| 3 | City Of Dallas Central WWTP | Dallas | 104 | TX0047830 | Apr 2027 | 10 |
| 4 | Wilson Creek Regional Wastewater Treatment Plant | Mc Kinney | 70.77 | TX0047911 | Oct 2027 | 24 |
| 5 | Walnut Creek WWTP | Austin | 56.6 | TX0046981 | Mar 2025 | 0 |
| 6 | Southwest WWTP | Houston | 50.14 | TX0062995 | Sep 2027 | 68 |
| 7 | Hillebrandt WWTP | Beaumont | 47.3 | TX0046990 | Apr 2029 | 24 |
| 8 | South Austin Regional WWTP Electrical | Del Valle | 43.8 | TX0071889 | Jun 2031 | 0 |
| 9 | South Mesquite Regional Wastewater Treatment Plant | Mesquite | 37.57 | TX0047431 | Aug 2027 | 23 |
| 10 | Roberto R Bustamante WWTP | El Paso | 32.92 | TX0101605 | Apr 2030 | 35 |
| 11 | Leon Creek Water Recycling Center | San Antonio | 32 | TX0052639 | Jul 2027 | 5 |
| 12 | Pecan Creek Water Reclamation Plant | Denton | 30.27 | TX0047180 | Jul 2028 | 8 |
| 13 | City Of Houston | Houston | 28.8 | TX0062201 | Aug 2002 | 3 |
| 14 | New Vince Bayou WWTF | Pasadena | 25 | TX0117528 | Jul 2026 | 139 |
| 15 | City Of Garland Rowlett Creek WWTF | Garland | 22.38 | TX0024686 | Oct 2030 | 6 |
| 16 | Southeast Water Reclamation Plant | Lubbock | 21.96 | TX0106071 | Nov 2024 | 270 |
| 17 | Waco Metropolitan Area Regional Sewarge System | Waco | 21.83 | TX0026506 | Jul 2030 | 48 |
| 18 | Brushy Creek Regional Wastewater System - East | Round Rock | 20.77 | TX0101940 | Jan 2029 | 33 |
| 19 | South Laredo WWTP | Laredo | 16.98 | TX0085316 | Jun 2031 | 2 |
| 20 | River Road Wastewater Treatment Plant | Wichita Falls | 16.92 | TX0047686 | Jul 2028 | 2 |
| 21 | City Of Houston Upper Brays WWTF | Houston | 16.38 | TX0088153 | Aug 2030 | 26 |
| 22 | Oso WWTP | Corpus Christi | 16.32 | TX0047058 | Sep 2025 | 1 |
| 23 | Laredo City Of Sewer Plant | Laredo | 16.21 | TX0025461 | Oct 2027 | 81 |
| 24 | Bell County Wcid #1 Wastewater Treatment Facility | Killeen | 14.67 | TX0102938 | Feb 2030 | 36 |
| 25 | Northwest WWTP | Houston | 14.58 | TX0063011 | Aug 2030 | 16 |
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 September 11, 2026.