Endicott S_T Facility Wastewater Treatment Plant, Endicott, Washington

The Endicott S_T Facility is a municipal wastewater treatment plant located in Endicott, Washington, United States. It serves a small population of 360 residents in the rural community of Whitman County. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater. With a designed capacity of 567.81 volume units and a discharge volume of 567.81, the facility operates at full capacity. As a small plant, it is subject to state and federal permitting under the National Pollutant Discharge Elimination System (NPDES). The treated effluent is discharged into a local water body, likely a tributary of the Palouse River, which flows into the Snake River and ultimately the Columbia River. The plant plays a key role in protecting local water quality and downstream ecosystems in the Columbia River basin.

The plant discharges into a receiving water body within the Columbia River basin, which drains into the Pacific Ocean. The downstream environment includes the Palouse River and Snake River, supporting diverse aquatic life and agricultural water use. Protecting water quality in this region is important for salmonid habitats and irrigation.