Overview The Lakota Wastewater T reatment Plant is the larger of two plants in the Lakehaven utility district in Washington State. The 10 MGD facility serves a mostly residential community between the cities of Seattle and T acoma, and it discharges effluent into Puget Sound. After upgrading to a UV system for its primary disinfection needs, the plant retained its chlorine system to treat recycled water and to serve as a backup continge

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