Earlsboro PWA WWT - Secondary Wastewater Treatment in Pottawatomie County, Oklahoma

Earlsboro PWA WWT is a municipal wastewater treatment facility located in Pottawatomie County, Oklahoma, serving a small community of approximately 250 residents. The plant is situated near the intersection of Oklahoma State Highway 9 and US Route 270, providing essential sanitation services to the rural area. The plant employs secondary treatment, which is the standard biological treatment process required by the US Clean Water Act for municipal wastewater. With a designed capacity of 211.98 megaliters per year and an annual discharge volume of 94.64 megaliters, the facility operates well below its capacity, indicating room for future growth. As a small-scale plant, it is subject to EPA National Pollutant Discharge Elimination System (NPDES) permits administered by the Oklahoma Department of Environmental Quality, ensuring compliance with water quality standards. The treated effluent is discharged into local waterways that ultimately drain into the Canadian River basin, part of the larger Arkansas-White-Red River system. This watershed supports diverse aquatic life and provides water for agricultural and recreational uses downstream. The plant's secondary treatment helps protect the ecological health of the receiving waters by reducing organic pollutants and suspended solids.

The plant discharges into tributaries of the Canadian River, which flows into the Arkansas River and eventually the Mississippi River system. This watershed supports a variety of fish and wildlife, including species such as channel catfish and largemouth bass. The secondary treatment process reduces biochemical oxygen demand and total suspended solids, helping to maintain water quality in this ecologically sensitive region.