Sylvan Lake Resort Wastewater Treatment Plant - South Dakota, USA

Sylvan Lake Resort wastewater treatment plant is located in Custer County, South Dakota, United States, serving a small population of approximately 1,024 people. The plant is situated near Sylvan Lake in the Black Hills region, a popular recreational area. As a small-scale facility, it provides essential wastewater services to the resort community. The plant employs advanced treatment processes, ensuring high-quality effluent. With a designed capacity of 416.39 m³/day and a current discharge volume of 378.54 m³/day, it operates near its capacity. Under the US Clean Water Act, such facilities are regulated through the National Pollutant Discharge Elimination System (NPDES) permitting program, which sets effluent limits to protect water quality. The treated wastewater is discharged into the local watershed, which ultimately drains into the Missouri River basin. The Black Hills region is ecologically sensitive, supporting diverse aquatic life and providing habitat for species such as trout. The advanced treatment helps minimize nutrient and pollutant loading, protecting downstream water bodies and recreational uses.

The plant discharges into the Sylvan Lake watershed, part of the larger Missouri River basin. The Black Hills region features cold-water streams that support trout populations and other sensitive aquatic species. Advanced treatment reduces the risk of eutrophication and maintains water quality for downstream ecosystems and recreational activities.