Custer City WWT Wastewater Treatment Plant, Custer County, Oklahoma

Custer City WWT is a municipal wastewater treatment facility located in Custer County, Oklahoma, United States. The plant serves a small population of approximately 393 residents, reflecting its role in a rural community. It is situated in the central part of the state, within the South Central Plains ecoregion. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal wastewater. The facility has a designed capacity of 151.42 volume units and discharges a similar volume of treated effluent. Under the National Pollutant Discharge Elimination System (NPDES), plants of this scale are typically permitted by the Oklahoma Department of Environmental Quality to ensure compliance with water quality standards. The treated effluent from Custer City WWT is discharged into local streams that eventually drain into the Washita River, a tributary of the Red River. The Red River flows southward to the Gulf of Mexico. The plant plays a key role in protecting the water quality of these downstream water bodies and the aquatic ecosystems they support.

The plant discharges into local waterways that are part of the Washita River basin, which flows into the Red River and ultimately the Gulf of Mexico. The region's aquatic habitats support diverse species, including fish and migratory birds. The plant's secondary treatment helps reduce nutrient and organic loads, mitigating eutrophication risks in downstream waters.