LAKOTA STP Wastewater Treatment Plant, Federal Way, Washington

LAKOTA STP is a municipal wastewater treatment plant serving the Lakota area of Federal Way, Washington, United States. The facility handles wastewater for an estimated population of 50,050, placing it in the medium agglomeration category. Its location in King County places it within the regulatory framework of the Washington State Department of Ecology and the U.S. Environmental Protection Agency's Clean Water Act. As a plant serving over 10,000 people, LAKOTA STP is subject to National Pollutant Discharge Elimination System (NPDES) permitting requirements. Under the Clean Water Act, such facilities are expected to provide at least secondary treatment to meet water quality standards. The plant's designed capacity is 1.00 million gallons per day, indicating its scale within the regional infrastructure. The plant's treated effluent ultimately reaches Puget Sound, a major estuarine system of the Pacific Northwest. Puget Sound supports diverse marine life, including salmon, orcas, and shellfish. The plant's proximity to the coast underscores the importance of effective treatment to protect this ecologically sensitive marine environment from nutrient pollution and pathogens.

LAKOTA STP discharges into the Puget Sound watershed, which drains into the Salish Sea and then the Pacific Ocean. Puget Sound is a critical habitat for endangered species such as Chinook salmon and Southern Resident killer whales. The plant's coastal location means its effluent can directly affect marine water quality, making nutrient removal and pathogen control essential for preserving the sound's ecological health.