The Duck Creek Center is a Trickling Filter/Solids Contact (TF/SC) plant permitted to treat 30 million gallons per day (0.11 m3/d). The Texas Commission on Environmental Quality (TCEQ) limits discharge of treated wastewater that contains not greater than 10 milligrams per liter (mg/L) of carbonaceous biochemical oxygen demand, 15 milligrams per liter (mg/L) total suspended solids, and seasonal ammonia nitrogen limits of 5 milligrams per liter (mg/l) (December - March) and 2 milligrams per liter (mg/l) (April - November).
Treated effluent is discharged into Duck Creek, then to the East Fork of the Trinity River and ultimately to the Trinity River before being discharged into the Houston ship channel. During dry months, the river may be composed of up to 95 percent wastewater, and performance of the Duck Creek Plant is critical to the Trinity's health and usefulness as a drinking water source for those downstream.
All biosolids (sludge) precipitated at the Duck Creek Center are pumped via twelve-mile sludge transfer pipeline to the City’s Rowlett Creek Center with ultimate disposal in the City of Garlands' landfill.
In 2011, the Duck Creek Center treated an annual average flow of 19.52 million gallons per day (0.074 m3/d) of effluent wastewater. The Duck Creek Plant has performed well. The facility has received several Gold and Silver Awards from the National Association of Clean Water Agencies (NACWA) in recognition of its complete and consistent national pollutant discharge elimination system permit compliance. In 1989, the plant was recognized by the Environmental Protection Agency for “Excellence in Operations and Maintenance”.
Tours are given often to local, national, and international visitors.