Depoe Bay STP - Wastewater Treatment Plant in Depoe Bay, Oregon

Depoe Bay STP is a municipal wastewater treatment facility located in Depoe Bay, Oregon, United States. The plant serves a population of about 4,472 residents in this coastal community along the Pacific Ocean. As a small-scale facility, it plays a key role in managing local wastewater and protecting the surrounding environment. The plant has a designed capacity of 1.00 million gallons per day. Under the U.S. Clean Water Act, facilities of this size are typically required to meet secondary treatment standards through National Pollutant Discharge Elimination System (NPDES) permits issued by the Oregon Department of Environmental Quality. These permits set effluent limits to protect water quality. The treated effluent is discharged into the Pacific Ocean, as Depoe Bay is situated directly on the Oregon coast. The plant's operations are critical for maintaining the health of nearshore marine ecosystems, including habitats for fish, shellfish, and marine mammals. The local watershed drains into the ocean via small coastal streams and the Depoe Bay estuary.

Depoe Bay STP discharges treated wastewater into the Pacific Ocean via the Depoe Bay estuary, a small coastal inlet. The receiving waters support diverse marine life, including salmon, rockfish, and seabirds. The plant's location on the Oregon coast means its effluent enters a dynamic marine environment where dilution and dispersion are influenced by tides and currents. Protecting this coastal ecosystem from nutrient pollution and pathogens is essential for maintaining water quality and supporting local fisheries and tourism.