Piedmont WWT | Oklahoma City Wastewater Treatment Plant

Piedmont WWT is a municipal wastewater treatment facility located in Oklahoma City, Oklahoma, serving a population of approximately 3,840 residents. The plant is situated in Canadian County and operates as part of the region's wastewater infrastructure. As a small-scale facility, Piedmont WWT is subject to the U.S. Clean Water Act and operates under an EPA National Pollutant Discharge Elimination System (NPDES) permit issued by the Oklahoma Department of Environmental Quality. Such permits set effluent limits to protect water quality and typically require secondary treatment for municipal plants. The treated effluent from Piedmont WWT is discharged into local streams that flow into the Canadian River, a tributary of the Arkansas River, which ultimately drains into the Mississippi River and the Gulf of Mexico. This watershed supports diverse aquatic life and provides water for agricultural and recreational uses downstream.

Piedmont WWT discharges into the Canadian River basin, part of the larger Arkansas-White-Red River system that drains into the Mississippi River and the Gulf of Mexico. The receiving waters support a variety of fish and wildlife species, and the plant's discharge must comply with state water quality standards to protect downstream ecosystems and human uses.