Connell STP Wastewater Treatment Plant, Connell, Washington

Connell STP is a municipal wastewater treatment plant located in Connell, Washington, a small city in Franklin County. The plant serves a population of about 5,150 residents, placing it in the small-to-medium agglomeration category typical of rural inland communities in the Pacific Northwest. As a U.S. facility, Connell STP operates under the Clean Water Act, administered by the Washington State Department of Ecology. Plants of this scale are generally required to meet secondary treatment standards, with NPDES permits specifying effluent limits for biochemical oxygen demand, total suspended solids, and other parameters. The plant's treatment process and capacity details are not publicly available in this dataset, but typical facilities of this size use activated sludge or lagoon systems. The plant discharges to a local waterway that ultimately drains into the Columbia River Basin, one of the largest river systems in North America. The Columbia River flows to the Pacific Ocean, supporting diverse aquatic life including salmon runs and other migratory species. The plant's operations are subject to state water quality standards to protect downstream uses and ecosystems.

Connell STP discharges into a tributary of the Columbia River Basin, which flows through eastern Washington before reaching the Pacific Ocean. The region is semi-arid, and the river system supports critical habitat for salmon, steelhead, and other native fish species. Downstream water quality is managed under the Clean Water Act to protect aquatic life and recreational uses.