ESTILL STP Wastewater Treatment Plant, Luray, South Carolina

ESTILL STP is a municipal wastewater treatment plant located in Luray, South Carolina, serving a population of about 6,000. The facility is part of the region's wastewater infrastructure, handling domestic sewage from the local community. Under the US Clean Water Act, plants of this scale are typically required to provide secondary treatment, which involves biological processes to remove organic matter and suspended solids. The National Pollutant Discharge Elimination System (NPDES) permit program regulates discharges to ensure compliance with water quality standards. The plant's treated effluent is discharged into local waterways that drain into the broader Savannah River basin, eventually reaching the Atlantic Ocean. The facility plays a role in protecting downstream aquatic ecosystems from untreated sewage.

The plant discharges into tributaries of the Savannah River, which flows into the Atlantic Ocean near Savannah, Georgia. The downstream environment includes estuarine habitats that support diverse fish and wildlife, including migratory species. Protecting water quality in this watershed is important for maintaining ecological balance and recreational uses.