Morrison South WWT - Secondary Wastewater Treatment in Morrison, Oklahoma

Morrison South WWT is a municipal wastewater treatment facility located in Morrison, Noble County, Oklahoma. The plant serves a small population of 318 residents, reflecting the rural character of the community. It operates under the regulatory framework of the United States Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant provides secondary treatment, a standard level for small communities in the US, which typically involves biological processes to reduce organic matter and suspended solids. With a designed capacity of 185.48 megaliters per year and an actual discharge volume of 132.49 megaliters, the facility operates below its capacity, indicating room for future growth. The treated effluent is discharged into a local waterway that ultimately drains into the Arkansas River basin, part of the Mississippi River watershed. This downstream connection links the plant to the broader ecological network of the central United States, where water quality management is critical for aquatic habitats and downstream communities.

The plant's discharge enters a tributary of the Arkansas River, which flows through Oklahoma and Arkansas before joining the Mississippi River. This watershed supports diverse aquatic life, including fish species such as catfish and bass, and provides water for irrigation and recreation. The secondary treatment process helps reduce nutrient loading, protecting downstream water quality in a region where agricultural runoff can also impact ecosystems.