BJWSA_St Helena Wastewater Treatment Plant, Sangster Village, South Carolina

BJWSA_St Helena is a municipal wastewater treatment plant located in Sangster Village, Beaufort County, South Carolina, United States. The plant serves a population of approximately 6,000 residents and is part of the Beaufort-Jasper Water and Sewer Authority (BJWSA) system. Its location near the coast places it in a sensitive environmental zone. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the South Carolina Department of Health and Environmental Control (DHEC). For a plant serving around 6,000 people, secondary treatment is typically required, with possible additional nutrient removal to protect downstream waters. The plant's treated effluent likely discharges into a tributary of the Broad River or directly into the coastal waters of the Atlantic Ocean. The surrounding area includes tidal creeks and salt marshes that support diverse aquatic life, including shellfish and migratory birds. The plant plays a key role in protecting water quality in the sensitive Lowcountry ecosystem.

The plant is situated in the Lowcountry region of South Carolina, within the Broad River watershed. The Broad River flows into Port Royal Sound, which is part of the Atlantic Ocean. This coastal area features extensive salt marshes and tidal creeks that provide critical habitat for fish, shrimp, and crabs. Nutrient pollution from wastewater can lead to algal blooms and hypoxia, threatening the ecological health of these estuarine environments.