Rison WWTP - Advanced Wastewater Treatment in Rison, Arkansas

Rison WWTP is a municipal wastewater treatment facility located in Rison, Cleveland County, Arkansas, United States. The plant serves a population of approximately 1,344 residents, reflecting its role as a small-scale community infrastructure asset within the state's wastewater management network. The plant employs advanced treatment processes, which go beyond secondary treatment to remove additional pollutants such as nutrients and pathogens. With a designed capacity of 1,173.47 units and an actual discharge volume of 310.40 units, the facility operates well below its maximum capacity, indicating reserve capacity for future growth. As a U.S. facility, it operates under the Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits and monitoring requirements to protect water quality. The treated effluent from Rison WWTP is discharged into a local waterbody within the Lower Mississippi River basin. This region ultimately drains into the Mississippi River and then to the Gulf of Mexico, supporting diverse aquatic ecosystems and contributing to the overall health of the Mississippi River watershed. The advanced treatment helps minimize nutrient loading, which is critical for reducing downstream hypoxia in the Gulf.

Rison WWTP discharges into a local waterbody within the Lower Mississippi River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. The region supports diverse aquatic life, including fish and migratory birds, and the advanced treatment helps protect downstream water quality by reducing nutrient and pollutant loads that could contribute to eutrophication and hypoxia in the Gulf.