Fisherman Bay STP - Lopez Village, Washington Wastewater Treatment Plant

Fisherman Bay STP is a municipal wastewater treatment plant located in Lopez Village, Washington, United States. It serves a population of approximately 2,076 residents in the San Juan Islands region. The plant provides secondary treatment, a standard level for communities of this size under U.S. regulations. The plant has a designed capacity of 185.48 volume units and a reported discharge volume of 128.70 volume units, indicating operational headroom. As a U.S. facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Washington State Department of Ecology, which set effluent limits to protect water quality. Treated effluent from the plant discharges into the marine waters of the Salish Sea, specifically near Fisherman Bay. This coastal environment supports diverse aquatic life, including salmon, orcas, and shellfish. The plant's performance is critical to maintaining water quality in this ecologically sensitive archipelago.

The plant discharges into the marine waters of the Salish Sea, a complex estuary system that includes the Strait of Juan de Fuca and Puget Sound. This region supports critical habitats for salmon, orcas, and shellfish. The coastal location requires careful management to prevent nutrient enrichment and protect marine biodiversity.