Stewart Creek WWTP The Colony - Texas Wastewater Treatment Plant

Stewart Creek WWTP is a municipal wastewater treatment facility located in The Colony, Texas, a suburb in the Dallas-Fort Worth metroplex. The plant serves a population of about 39,000 people, classifying it as a medium-sized agglomeration under US regulatory frameworks. As a US facility, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Texas Commission on Environmental Quality (TCEQ). This regulatory framework requires secondary treatment as a baseline, with additional nutrient removal or disinfection depending on the receiving water body's sensitivity. The plant's treatment processes are designed to meet these permit limits, protecting public health and the environment. The treated effluent from Stewart Creek WWTP is discharged into local waterways that ultimately drain into the Trinity River basin. The Trinity River flows southeast through Texas and into Trinity Bay, part of the Galveston Bay system on the Gulf of Mexico. This watershed supports diverse aquatic life and provides drinking water for millions of Texans, making effective wastewater treatment critical for downstream water quality.

The plant discharges into the Trinity River basin, which flows into Trinity Bay and the Galveston Bay estuary on the Gulf of Mexico. This estuarine system supports commercially important fisheries and migratory bird populations. The watershed is ecologically sensitive due to urban runoff and industrial inputs from the Dallas-Fort Worth area, requiring robust treatment to prevent nutrient enrichment and hypoxia in the bay.