AVANT PWA WWT Wastewater Treatment Plant - Avant, Oklahoma

AVANT PWA WWT is a municipal wastewater treatment plant located in Avant, Osage County, Oklahoma. Serving a population of approximately 372 residents, the facility provides secondary treatment to meet state and federal water quality standards. The plant's designed capacity is 344.47 megaliters, with an annual discharge volume of 113.56 megaliters. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. As a small facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Oklahoma Department of Environmental Quality, ensuring compliance with effluent limits for biochemical oxygen demand, total suspended solids, and other pollutants. Treated effluent from the plant is discharged into local waterways within the Arkansas River basin. The region's aquatic ecosystems benefit from the plant's treatment processes, which reduce nutrient and organic loads that could otherwise impact downstream water quality in the Verdigris River and ultimately the Mississippi River system.

The plant discharges into tributaries of the Arkansas River, which flows through Oklahoma and Arkansas before joining the Mississippi River. The local watershed supports diverse aquatic life, including fish and macroinvertebrates, and the plant's secondary treatment helps protect these ecosystems from nutrient enrichment and oxygen depletion.