Westville UA WWT - Advanced Wastewater Treatment in Adair County, Oklahoma

Westville UA WWT is a municipal wastewater treatment facility located in Adair County, Oklahoma, serving a population of approximately 1,596 residents. The plant is situated in the rural Ozark region of eastern Oklahoma, near the Arkansas border. The facility employs advanced treatment processes, exceeding the secondary treatment standard required by the US Clean Water Act. With a designed capacity of 1,135.62 megaliters and an annual discharge volume of 757.08 megaliters, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged into local waterways that drain into the Illinois River watershed, a tributary of the Arkansas River system. This region supports diverse aquatic life and is part of the larger Mississippi River basin, ultimately reaching the Gulf of Mexico. Advanced treatment helps minimize nutrient loading and protects downstream ecosystems.

The plant discharges into streams within the Illinois River watershed, which flows into the Arkansas River and eventually the Mississippi River. This region is ecologically sensitive, supporting diverse aquatic species and serving as a migratory corridor. Advanced treatment reduces nutrient and pollutant loads, helping to maintain water quality in downstream rivers and the Gulf of Mexico.