Kingston STP - Secondary Wastewater Treatment Plant in Kingston, Washington

Kingston STP is a municipal wastewater treatment plant located in Kingston, Washington, United States. It serves a small population of 1,871 residents in this coastal community on the Kitsap Peninsula. The plant is situated near the shores of Puget Sound, an ecologically significant marine water body. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 1,741.28 million gallons per year and an actual discharge volume of 435.32 million gallons per year, the plant operates well below its capacity. As a small facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting administered by the Washington State Department of Ecology. Treated effluent from Kingston STP discharges into Puget Sound, a major estuary of the Pacific Ocean. Puget Sound supports diverse marine life, including salmon, orcas, and shellfish. The plant's coastal location means its discharge must meet stringent water quality standards to protect the sensitive marine ecosystem and recreational uses of the sound.

Kingston STP discharges treated wastewater into Puget Sound, a large estuary connected to the Pacific Ocean via the Strait of Juan de Fuca. Puget Sound is a critical habitat for salmon, steelhead, and southern resident killer whales, and supports extensive shellfish beds. The plant's coastal location requires careful management to prevent nutrient enrichment and protect water quality in this ecologically sensitive marine environment.