Arrow Wood STP - St. Tammany Parish, Louisiana Wastewater Treatment Plant

Arrow Wood STP is a municipal wastewater treatment plant located in St. Tammany Parish, Louisiana, serving a population of about 11,774. The facility is part of the region's wastewater infrastructure, managing residential and commercial flows from the surrounding community. As a plant of this scale in the United States, Arrow Wood STP is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Louisiana Department of Environmental Quality. Plants serving populations of this size commonly employ secondary treatment, including biological processes and disinfection, to meet state and federal effluent standards. The treated wastewater from Arrow Wood STP is discharged into local water bodies that drain into the Lake Pontchartrain Basin, an ecologically significant estuary. This basin supports diverse aquatic life and is a critical habitat for fish and migratory birds. The plant's operations help protect water quality in this sensitive coastal watershed, which ultimately connects to the Gulf of Mexico.

Arrow Wood STP discharges into streams within the Lake Pontchartrain Basin, a large estuarine system that drains into the Gulf of Mexico. The basin supports diverse aquatic habitats, including wetlands and marshes that provide nursery grounds for fish and shellfish. Protecting water quality in this watershed is essential for maintaining the ecological health of the estuary and the broader Gulf Coast ecosystem.