ERIN STP - Wastewater Treatment Plant in Cumberland City, Tennessee

ERIN STP is a municipal wastewater treatment plant located in Cumberland City, Stewart County, Tennessee. It serves a population of about 2,824 people, typical of a small community in the rural Middle Tennessee region. The plant's designed capacity is 1.00 million gallons per day, indicating it is sized for modest flows. As a U.S. facility, ERIN STP operates under the Clean Water Act, administered by the Tennessee Department of Environment and Conservation. Plants of this scale are generally required to meet secondary treatment standards, with permits specifying effluent limits for biochemical oxygen demand, total suspended solids, and other parameters. Typical small plants in this region use activated sludge or lagoon systems. The plant discharges to a receiving water body, likely a tributary of the Cumberland River, which flows into the Ohio River and ultimately the Mississippi River. This watershed supports diverse aquatic life and is important for regional water quality. The plant's operation helps protect downstream ecosystems and public health in the Cumberland River basin.

ERIN STP discharges into a local waterway that is part of the Cumberland River watershed. The Cumberland River flows through Tennessee and Kentucky before joining the Ohio River, a major tributary of the Mississippi River. This basin supports diverse aquatic species, including several fish and mussel species. The plant's effluent must meet state water quality standards to protect these downstream ecosystems, particularly in the context of nutrient management and dissolved oxygen levels.