Ninety Six STP Wastewater Treatment Plant, Greenwood County, South Carolina

Ninety Six STP is a wastewater treatment facility located on Amusement Drive in Greenwood County, South Carolina, serving a population of about 3,800 residents. The plant is part of the local municipal wastewater infrastructure managed by the county. As a US facility, Ninety Six STP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the South Carolina Department of Health and Environmental Control. For a plant serving a small community of this size, secondary treatment is the standard requirement under federal regulations. The plant discharges treated effluent into local waterways within the Saluda River basin, which ultimately flows into the Congaree River and then the Atlantic Ocean via the Santee River system. The surrounding area features forested watersheds and agricultural lands, and the plant plays a role in protecting downstream water quality.

The plant's treated effluent enters the Saluda River watershed, part of the larger Santee River basin that drains into the Atlantic Ocean. This region supports diverse aquatic life, including fish species such as striped bass and American shad, and provides habitat for migratory birds. The watershed is ecologically sensitive due to its role in maintaining water quality for downstream ecosystems.