Widener WWTP - Secondary Treatment Plant in St. Francis County, Arkansas

Widener WWTP is a municipal wastewater treatment facility located in St. Francis County, Arkansas, United States. The plant serves a small population of 273 residents and operates under secondary treatment standards, which is the minimum required by the US Clean Water Act for municipal wastewater. Its designed capacity of 227.12 million gallons per day suggests it can handle significant flow, though current discharge volume is 3.79 million gallons per day. As a secondary treatment plant, Widener WWTP uses biological processes to remove organic matter and suspended solids. The facility is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Arkansas Department of Energy and Environment. This permit sets effluent limits to protect water quality in the receiving water body. The plant's treated effluent is discharged into a local waterway that eventually drains into the Mississippi River watershed. The Mississippi River system is a major ecological corridor supporting diverse aquatic life and providing drinking water for millions. The plant's location in eastern Arkansas places it within the Mississippi Alluvial Plain, an ecologically significant region known for its wetlands and floodplain forests.

Widener WWTP discharges into a tributary of the Mississippi River, which flows into the Gulf of Mexico. The Mississippi River basin is one of the largest in North America, supporting a wide range of aquatic species and providing critical habitat for migratory birds. The plant's secondary treatment helps reduce nutrient loads that could contribute to the Gulf of Mexico hypoxic zone, an area of low oxygen that affects marine life.