Red Rock WWT - Secondary Wastewater Treatment in Noble County, Oklahoma

Red Rock WWT is a wastewater treatment facility located in Noble County, Oklahoma, United States. It serves a small community of 293 residents, reflecting the rural character of the area. The plant operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges to protect water quality. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. Its designed capacity is 113.56 units, with an average daily discharge of 75.71 units, indicating operational headroom. As a small facility, it is subject to state-level NPDES permits that set effluent limits based on the receiving water body's assimilative capacity. The treated effluent is discharged into local waterways that ultimately drain into the Arkansas River basin, part of the Mississippi River watershed. This region supports agricultural activities and diverse aquatic habitats. The plant's performance is critical to maintaining water quality in downstream rivers and lakes, which are used for recreation and irrigation.

The plant discharges into tributaries of the Arkansas River, which flows through Oklahoma and Arkansas before joining the Mississippi River. The watershed supports a mix of agricultural and natural landscapes, with seasonal variations in flow. Downstream water bodies include Lake Hudson and the Arkansas River itself, which provide habitat for fish and wildlife. The plant's secondary treatment helps reduce nutrient loading and protect aquatic ecosystems in this inland basin.