Marshall WWTP - Secondary Treatment Plant in Marshall, North Carolina

Marshall WWTP is a municipal wastewater treatment facility located in Marshall, Madison County, North Carolina. The plant serves a small population of 750 residents, providing essential sanitation services for this rural Appalachian community. Its location in the French Broad River basin places it within a region known for its mountainous terrain and water quality sensitivity. The plant employs secondary treatment, which is the standard biological treatment process required by the US Clean Water Act for municipal facilities. With a designed capacity of 1514.16 megaliters per year, the plant operates well below its capacity, treating approximately 227.13 megaliters annually. As a US facility, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the North Carolina Department of Environmental Quality, which sets effluent limits to protect water quality. The treated effluent from Marshall WWTP discharges into a tributary of the French Broad River, which flows northwest through the Appalachian Mountains before joining the Tennessee River and ultimately the Mississippi River system. The receiving waters support diverse aquatic life, including native fish species, and are important for recreation and drinking water supplies downstream. The plant's secondary treatment helps reduce nutrient loads and organic pollutants, contributing to the ecological health of the French Broad River watershed.

Marshall WWTP discharges into a tributary of the French Broad River, which flows through the Blue Ridge Mountains and joins the Tennessee River, part of the Mississippi River basin. The watershed supports diverse aquatic ecosystems, including native trout and mussel species, and provides drinking water for downstream communities. The plant's secondary treatment helps protect water quality in this ecologically sensitive mountainous region.