Vader S_T Facility Wastewater Treatment Plant, Vader, Washington

Vader S_T Facility is a municipal wastewater treatment plant located on C Street in Vader, Lewis County, Washington. It serves a small population of 625 residents, reflecting the rural character of the surrounding area in the Pacific Northwest. The plant provides secondary treatment, the standard required by the US Clean Water Act for municipal facilities. With a designed capacity of 492.10 megaliters and an annual discharge volume of 454.25 megaliters, it operates at a high utilization rate. The plant is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Washington State Department of Ecology. The treated effluent is discharged into a local waterway that ultimately drains into the Columbia River basin and then to the Pacific Ocean. The facility plays a key role in protecting water quality in the region, supporting aquatic life and downstream ecosystems in the Cowlitz River watershed.

The plant discharges into a tributary of the Cowlitz River, which flows into the Columbia River and eventually reaches the Pacific Ocean. This watershed supports diverse aquatic species, including salmon runs, and the treatment plant helps maintain water quality standards for fish habitat and recreational use.