The 50 largest wastewater treatment plants in Texas
Ranked by average flow · 1,311 MGD combined · 52% of the state's reported flow
Village Creek Reclamation Facility in Arlington is the largest publicly owned wastewater treatment plant in Texas by reported average flow, treating about 147.27 million gallons per day. The 50 plants below treat 1,311 MGD between them, 52% of the flow reported by all 1,244 plants in the state, and serve about 8,920,165 people. Every plant links to its profile with permit and compliance data. Treatment technology is shown with a free Klarifi account.
| # | Facility | City | Avg flow (MGD) | Population | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| 1 | Village Creek Reclamation Facility | Arlington | 147.27 | 1,136,072 | TX0047295 | Jan 2029 | 3 |
| 2 | Dos Rios Water Recycling Center | San Antonio | 124.77 | 1,161,197 | TX0077801 | Jun 2025 | 44 |
| 3 | City Of Dallas Central WWTP | Dallas | 118.1 | 744,579 | TX0047830 | Apr 2027 | 11 |
| 4 | Walnut Creek WWTP | Austin | 69.41 | 400,000 | TX0046981 | Mar 2025 | 0 |
| 5 | Southwest WWTP | Houston | 55 | 100,000 | TX0062995 | Sep 2027 | 73 |
| 6 | South Austin Regional WWTP Electrical | Del Valle | 52.19 | 457,525 | TX0071889 | Jun 2031 | 0 |
| 7 | South Mesquite Regional Wastewater Treatment Plant | Mesquite | 43.31 | 354,544 | TX0047431 | Aug 2027 | 24 |
| 8 | Leon Creek Water Recycling Center | San Antonio | 41.23 | 165,587 | TX0052639 | Jul 2027 | 5 |
| 9 | Hillebrandt WWTP | Beaumont | 34.23 | 140,984 | TX0046990 | Apr 2029 | 22 |
| 10 | Roberto R Bustamante WWTP | El Paso | 33.07 | 377,670 | TX0101605 | Apr 2030 | 35 |
| 11 | Brushy Creek Regional Wastewater System - East | Round Rock | 28.7 | 284,597 | TX0101940 | Jan 2029 | 33 |
| 12 | Waco Metropolitan Area Regional Sewarge System | Waco | 28.36 | 188,342 | TX0026506 | Jul 2030 | 48 |
| 13 | City Of Garland Rowlett Creek WWTF | Garland | 25.28 | 197,170 | TX0024686 | Oct 2030 | 6 |
| 14 | Southeast Water Reclamation Plant | Lubbock | 21.94 | 263,075 | TX0106071 | Nov 2024 | 254 |
| 15 | Oso WWTP | Corpus Christi | 21.26 | 133,576 | TX0047058 | Sep 2025 | 1 |
| 16 | Pecan Creek Water Reclamation Plant | Denton | 20.72 | 148,099 | TX0047180 | Jul 2028 | 5 |
| 17 | City Of Houston | Houston | 20.08 | 100,000 | TX0062201 | Aug 2002 | 3 |
| 18 | Northwest WWTP | Houston | 19.83 | 100,000 | TX0063011 | Aug 2030 | 16 |
| 19 | Almeda Sims WWTP | Houston | 18.59 | 125,465 | TX0034924 | Mar 2030 | 16 |
| 20 | Bell County Wcid #1 Wastewater Treatment Facility | Killeen | 17.65 | 195,213 | TX0102938 | Feb 2030 | 36 |
| 21 | City Of Houston Upper Brays WWTF | Houston | 17.19 | 50,000 | TX0088153 | Aug 2030 | 33 |
| 22 | Port Arthur Main WWTF | Port Arthur | 16.99 | 54,634 | TX0047589 | Sep 2030 | 79 |
| 23 | Washburn Tunnel Facility | Pasadena | 15.54 | — | TX0052591 | Apr 2019 | 11 |
| 24 | Keegans Bayou WWTP | Houston | 15.14 | 113,196 | TX0098191 | Jun 2026 | 12 |
| 25 | Turkey Creek WWTF | Houston | 14.84 | 48,384 | TX0035017 | May 2031 | 5 |
| 26 | City Of Texas City | Texas City | 14.65 | 48,036 | TX0023949 | Jul 2030 | 5 |
| 27 | City Of Longview Main WWTP | Longview | 14.44 | 81,025 | TX0022217 | Sep 2026 | 11 |
| 28 | Denton Creek Regional WWTF | Roanoke | 14.01 | 39,473 | TX0104957 | Apr 2029 | 8 |
| 29 | New Vince Bayou WWTF | Pasadena | 13.95 | 113,435 | TX0117528 | Jul 2026 | 132 |
| 30 | Northeast WWTP | Houston | 13.71 | 38,198 | TX0063037 | Jul 2028 | 15 |
| 31 | Temple Belton WWTP | Belton | 13.65 | 61,603 | TX0058378 | Jul 2030 | 25 |
| 32 | Freshwater Supply District 23 | Houston | 13.57 | 42,828 | TX0063053 | Aug 2031 | 4 |
| 33 | Dallas Salmon WWTP | League City | 12.64 | 15,000 | TX0085618 | Apr 2029 | 4 |
| 34 | South Regional Waste Water Treatment Facility | Texarkana | 12.51 | 116,259 | TX0101800 | Jul 2026 | 13 |
| 35 | Muddy Creek Regional WWTP | Wylie | 12.18 | 47,088 | TX0123561 | Aug 2030 | 11 |
| 36 | West District WWTF | Houston | 12.11 | 50,000 | TX0063002 | Jul 2029 | 13 |
| 37 | Haskell R. Street Wastewater Treatment Plant | El Paso | 11.57 | 181,728 | TX0026751 | May 2030 | 2 |
| 38 | City Of Tyler- Westside Wastewater Treatment Plant | Tyler | 10.94 | 74,080 | TX0047996 | Aug 2031 | 36 |
| 39 | South Laredo WWTP | Laredo | 10.86 | 263,966 | TX0085316 | Jun 2031 | 2 |
| 40 | Laredo City Of Sewer Plant | Laredo | 10.77 | 130,000 | TX0025461 | Oct 2027 | 82 |
| 41 | Hamby WWTP | Hamby | 10.57 | 135,574 | TX0023973 | May 2031 | 7 |
| 42 | River Road Wastewater Treatment Plant | Wichita Falls | 10.56 | 105,333 | TX0047686 | Jul 2028 | 2 |
| 43 | Conroe Southwest Regional WWTP | Conroe | 10.4 | 50,004 | TX0022268 | Oct 2029 | 9 |
| 44 | Cibolo Creek Municipal Authority WWTP | Schertz | 10.39 | 60,434 | TXR05FI55 | Aug 2026 | 1 |
| 45 | Blackhawk Regional WWTP | Houston | 9.87 | 57,528 | TX0069728 | Jan 2030 | 19 |
| 46 | City Of Nederland Wastewater Treatment Plant | Nederland | 9.76 | 17,460 | TX0026476 | Jan 2031 | 20 |
| 47 | Carters Creek Wastewater Treatment Plant | College Station | 9.6 | 75,238 | TX0047163 | Jun 2030 | 49 |
| 48 | Medio Creek Water Recyc. Ctr. | San Antonio | 9.52 | — | TX0055689 | May 2028 | 2 |
| 49 | Little Cedar Bayou Wastewater Treatment Facility | La Porte | 9.24 | 40,898 | TX0022799 | Apr 2030 | 8 |
| 50 | Chocolate Bayou Wastewater Treatment Facilities | Houston | 9.12 | 35,068 | TX0063061 | Sep 2027 | 7 |
Treatment technology for each plant is shown with a free Klarifi account. Create one →
Largest plants 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: WWTP · POTW · MGD · NPDES permit · Biological nutrient removal · Tertiary treatment · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “The 50 largest wastewater treatment plants in Texas (2026).” Updated October 26, 2026. https://klarifi.io/facilities/texas/largestNeed a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.